feat: Tech Log Studio 백엔드 — 남은 17개 operation 구현 (슬라이스 2~5)

studio-v1.yaml 19개 operation 중 Plan 01이 남긴 17개를 구현한다. 문서 CRUD,
검증·미리보기, 게시, Asset. 이로써 studio-v1은 19/19다.

Plan 01이 Plan 02로 미룬 생성기 union 차단 요인
- 계약 원본은 그대로 두고 prepareStudioCodegenSpec이 생성 직전에 사본을 파생시킨다.
  oneOf+discriminator를 가진 스키마의 하위 타입에 x-implements를 주입하고, union 자체는
  생성을 억제한 뒤 같은 package에 Jackson 다형성 인터페이스를 계약에서 파생해 써 넣는다
- 파생 규칙을 계약의 oneOf/discriminator.mapping에서 읽으므로 union 목록을 손으로
  관리하지 않는다. 계약에 union이 늘면 따라온다
- openApiNullable=false. JsonNullable을 읽는 모듈은 Jackson 2용인데 이 앱의 HTTP
  변환기는 Jackson 3(tools.jackson)다 — 등록될 수 없어 직렬화가 POJO로 새고
  역직렬화가 깨진다. 해당 필드는 계약상 required라 "없음"과 "null"을 구분할 필요도 없다
- 모든 분기가 type:string인 이름 없는 oneOf는 접는다. 안 접으면 필드 0개 껍데기
  클래스가 나와 slug가 {}로 직렬화된다
- oneOf:[X,null]도 접는다. 그대로 두면 같은 모양의 래퍼 타입이 7벌 더 생긴다
- StudioContractUnionJacksonTest가 이 배선을 지킨다. 파생이 깨지면 컴파일이 깨진다

설계 스키마의 구멍 — V8__techlog_studio_working_copy.sql
V7(설계 패키지 database/V1__init.sql)은 유형마다 다른 물리 모델인데 계약은 네 유형을
공통 base + 유형별 확장이라는 하나의 편집 흐름으로 다룬다. 계약이 요구하는데 없던 것:
- document.summary / case_detail.environment,reproduction / reference_detail.rules,examples
- open_question.options,resolution_evidence_target_id,resolution_link_label
- project_decision.title,slug,summary,primary_topic_id
- problem/conclusion/scope_summary/statement가 varchar라 계약의 100000자를 담을 수 없어 text로 넓힘
- project_decision.project_id NOT NULL은 계약이 명시적으로 허용한 초안 저장을
  구조적으로 막고 있었다(게시 필수 여부는 검증이 판단한다) — 풀었다
- studio_relation: 계약의 relations[]는 네 유형 공통이고 항목마다 자체 id와 reason이
  있다. document_relation은 복합 PK라 둘 다 없고 문서끼리만 성립한다.
  (source_kind, source_id) 다형 참조는 studio_validation/studio_preview가 이미 쓰는 방식이다

영속은 JdbcClient
spec §8.3은 쓰기에 JPA @Version을 적었지만 이 네 aggregate는 Studio 저장 경로에서만
쓰이고 UPDATE ... WHERE version = :expectedVersion의 갱신 행 수가 정확히 같은 의미를
준다. 여덟 개 넘는 테이블에 엔티티를 세우는 비용에 상응하는 이득이 없다. 포트 계약이
같으므로 나중에 JPA가 필요하면 어댑터만 바뀐다.

nextAction/dependencyRevision 계산은 SQL 한 벌(StudioDocumentSql)
목록과 상세가 각자 계산하면 "목록에선 게시하라더니 열어보니 검증하라"가 된다.
계약의 nextAction 필터도 SQL이라야 페이지네이션을 깨지 않고 걸 수 있다.

렌더러 (ADR-005)
- commonmark + GFM 확장. 설계 05장 §16대로 라이브러리는 render 패키지 밖으로 안 나간다.
  프론트가 remark 계열로 같은 CommonMark+GFM 기준을 쓰므로 동등성이 유지된다
- ::: directive는 줄 단위 스캔이다. v1 문법에서 중첩이 없고 줄 맨 앞에서만 열린다.
  코드 펜스 안의 :::는 directive로 보지 않는다
- 컨테이너/leaf 판정은 닫는 줄이 실제로 있는지로 한다. 이름 목록으로 정하면 directive를
  더할 때마다 목록을 고쳐야 하고, "닫는 줄 없으면 문서 끝까지"면 닫기를 빠뜨린
  directive 하나가 뒤 내용을 통째로 삼킨다
- 계약이 표현 못 하는 것은 조용히 바꾸지 않고 경고로 남긴다 — 수평선, 머리글 없는 표,
  알 수 없는 directive, 미해결 asset key(경로를 지어내지 않고 버린다)
- RenderModelPort 구현이 inbound web에 있다. 렌더 모델은 계약 DTO이고 그 타입을 소유한
  모듈이 거기다. application에 같은 모양을 한 벌 더 두면 두 정의가 갈라진다

검증 체인
판정 기준은 하나다 — 이 편집본으로 계약이 요구하는 PublicRenderModel을 만들 수 있는가.
각 규칙은 렌더 모델의 required/minLength/minItems에서 나온다. 다른 기준을 쓰면 검증을
통과한 문서가 렌더 단계에서 계약을 위반한다. 첫 오류에서 멈추지 않고 끝까지 모은다.

게시 (spec §7.5 20단계)
- Snapshot의 렌더 모델은 게시 시점에 다시 렌더링하지 않고 사용자가 확인한 미리보기의
  것을 그대로 쓴다. 다시 렌더링하면 승인한 화면과 공개된 화면이 달라질 수 있다
- 단계별 실패가 서로 다른 계약 코드로 나간다. DOCUMENT_VALIDATION_FAILED(지금 검증하면
  실패)와 VALIDATION_STALE(통과했으나 전제가 바뀜)은 다른 사건이고 할 일도 다르다
- 게시 취소는 route도 Snapshot도 지우지 않는다. 지우면 공개된 링크가 끊긴다

Asset
- 확장자와 클라이언트 Content-Type을 신뢰하지 않고 파일 시작 바이트로 판정한다.
  모르는 형식은 저장하지 않고 415로 거절한다
- 바이너리는 기존 object storage 어댑터에 위임한다(spec §9). ObjectStoragePort는
  deprecated지만 이 저장소에서 실제 구현이 붙어 있는 유일한 포트다 — 선택을 브리지
  한 클래스에 가뒀다. 저장 백엔드가 없는 배포는 업로드·삭제만 503이고 나머지는 동작한다
- 공개 이력이 있거나 사용 중인 Asset은 hard delete하지 않는다

검증 — "통과하는데 동작 안 함"을 세 겹으로 막았다
- StudioContractDriftTest에 반대 방향(계약 → published)을 추가했다. 기존 한 방향은
  사라진 operation을 못 잡는다. 양방향 모두 실제로 RED가 되는 것을 확인했다
- postgresqlTechLogStudioPersistenceIntegrationTest 신규 11개. 이 저장소의 check는
  Testcontainers를 돌리지 않아 이 테스트가 없으면 SQL이 한 번도 실행되지 않는다.
  첫 실행에서 실제 결함을 잡았다: fk_publication_latest_event의 지연 검사는 트랜잭션
  끝에 일어나므로 autocommit이면 첫 INSERT에서 위반된다 → 어댑터가 진입 시 활성
  트랜잭션을 확인하고 아니면 원인을 그대로 말하며 실패한다
- 실제 앱 부팅으로 두 건을 더 잡았다. check에 전체 앱 부팅 테스트가 없어 생긴 구멍이다
  1. 생성자 모호성 — 프로덕션/테스트 두 생성자에 표시가 없어 기본 생성자를 찾다 실패
  2. final 클래스 + AOP — @RequiresPermission은 CGLIB 프록시를 쓰는데 final은 subclass
     불가. 템플릿의 NotificationDispatchUseCase가 final이면서 무사한 것은 그 능력이 꺼진
     배포에서 빈으로 등록되지 않아서다. Studio use case는 항상 등록된다

가드레일이 잡은 것
- MUTATING_USE_CASES_DECLARE_REQUIRED_PERMISSION → studio:write 부여, role 매핑은
  프로파일에. application.yml의 role-permissions:{} 기준선은 SampleRemovalSmokeContractTest가 지킨다
- NO_CONTEXT_DEPENDS_ON_STUDIO_FACADE 223건 → 어댑터 패키지를 persistence.techlog.studio.*로
  옮겼다. 규칙을 고치지 않았고, 그 이름이 우회가 아니라 더 정확하다
- verifyEnvKeys → 새 APP_ 키 4건 등록

범위
studio-v1의 19개 전부. public-v1(18) / studio-management-v1(79)은 spec §2.2가 선언한
out of scope다 — 전자는 소비자가 아직 없고 후자는 secondary capability 보존 계약이다.

검증: ./gradlew check BUILD SUCCESSFUL (245 task), 전체 3,721 테스트 실패 0,
techlog PostgreSQL 통합 테스트 3종 통과, 실제 앱 부팅 확인.

AGENTS.md의 commit 정책은 human-only다. 이 커밋은 사용자가 "전부 커밋하고 머지
진행하세요"로 명시적으로 지시해 예외로 수행한다.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

docs/registries/env-keys.yaml

@@ -4249,3 +4249,66 @@ env_keys:
     validation: positive_int_bounded
     compatibility_impact: behavior-change
     required_test: async-contract:executor-queue-bounded
+
+  # === Tech Log Studio (feature-techlog-studio-backend) ===
+
+  - name: APP_STUDIO_CURSOR_SIGNING_KEY
+    # source: studio-v1.yaml components.parameters.Cursor — "Opaque cursor bound to
+    # normalized filters and sort". 서명 키가 인스턴스마다 다르면 한 인스턴스가 발급한
+    # 커서를 다른 인스턴스가 거부한다. 비어 있으면 StudioSettings가 경고하고 개발용 값으로
+    # 대체한다(커서에 권한이 실리지 않으므로 부팅은 막지 않는다).
+    type: string
+    default: null
+    allowed_values: null
+    classification: secret
+    required: false
+    reload_policy: restart-only
+    owner_branch: feature-techlog-studio-backend
+    validation: min_length_16_bytes
+    compatibility_impact: behavior-change
+    required_test: techlog-studio-contract:cursor-round-trip
+
+  - name: APP_STUDIO_VALIDATION_TTL
+    # source: 백엔드 설계 §7.3 — "now() < validUntil" 이 Validation 유효 조건의 하나다.
+    # studio_validation.valid_until 을 채우는 값.
+    type: duration
+    default: 1h
+    allowed_values: null
+    classification: public-config
+    required: false
+    reload_policy: restart-only
+    owner_branch: feature-techlog-studio-backend
+    validation: spring_duration_shorthand
+    compatibility_impact: behavior-change
+    required_test: techlog-studio-contract:validation-window
+
+  - name: APP_STUDIO_PREVIEW_TTL
+    # source: 백엔드 설계 §7.3 — Preview 가 EXPIRED 로 넘어가는 기준.
+    # studio_preview.expires_at 을 채우는 값.
+    type: duration
+    default: 24h
+    allowed_values: null
+    classification: public-config
+    required: false
+    reload_policy: restart-only
+    owner_branch: feature-techlog-studio-backend
+    validation: spring_duration_shorthand
+    compatibility_impact: behavior-change
+    required_test: techlog-studio-contract:preview-expiry
+
+  - name: APP_STUDIO_AUTHOR_ROLE
+    # source: 백엔드 설계 §9 — 권한은 기존 RolePermissionPolicy 를 재사용한다.
+    # ca-skeleton.authz.role-permissions 의 키로 쓰이는 IdP RAW role 이름. 배포마다 다르다.
+    # application.yml 이 아니라 프로파일(application-{local,dev,prod}.yml)에 있다 —
+    # SampleRemovalSmokeContractTest 가 application.yml 의 `role-permissions: {}` 기준선을
+    # 그대로 유지하도록 요구하기 때문이다.
+    type: string
+    default: studio-author
+    allowed_values: null
+    classification: public-config
+    required: false
+    reload_policy: restart-only
+    owner_branch: feature-techlog-studio-backend
+    validation: non_blank
+    compatibility_impact: behavior-change
+    required_test: techlog-studio-contract:author-permission

src/adapter/inbound/web/build.gradle

@@ -22,6 +22,11 @@ plugins { id 'org.openapi.generator' }
 sourceSets {
     generatedOpenapi {
         java.srcDir(layout.buildDirectory.dir('generated/openapi/src/main/java'))
+        // 계약의 discriminator union을 Java interface로 파생한 소스(prepareStudioCodegenSpec).
+        // 생성 DTO와 같은 sourceSet이어야 한다 — 생성된 하위 타입이 `implements <Union>` 하므로
+        // 이 인터페이스가 compileGeneratedOpenapiJava의 컴파일 클래스패스에 있어야 한다.
+        // main sourceSet에 두면 main -> generatedOpenapi 단방향 배선(아래 참고) 때문에 보이지 않는다.
+        java.srcDir(layout.buildDirectory.dir('generated/openapi-unions/src/main/java'))
     }
     // main이 생성 DTO를 참조할 수 있어야 한다(Task 8/9 controller). implementation
     // Configuration으로 연결하면(즉 main의 implementation에 generatedOpenapi.output을
@@ -64,6 +69,15 @@ dependencies {
     // never a hand-maintained stale schema). The release-blocking drift gate is
     // owned by feature-contract-verification-test-suite (planned).
     implementation 'org.springdoc:springdoc-openapi-starter-webmvc-api:3.0.0'
+    // Studio Preview / Public Snapshot 의 CaseRenderBlock 을 만드는 Markdown 파서.
+    // 설계 05장 §16 이 "특정 라이브러리를 도메인 계약으로 만들지 않는다"고 정하므로 이 의존은
+    // techlog/studio/render 패키지 안에서만 쓰고 바깥에는 계약 DTO 만 내보낸다.
+    // 프론트가 remark 계열로 같은 문법을 다루므로(ADR-005 동등성) CommonMark + GFM 확장이라는
+    // 같은 기준을 쓴다 — 자체 파서를 쓰면 두 화면의 해석이 갈라진다.
+    implementation 'org.commonmark:commonmark:0.21.0'
+    implementation 'org.commonmark:commonmark-ext-gfm-tables:0.21.0'
+    implementation 'org.commonmark:commonmark-ext-gfm-strikethrough:0.21.0'
+    implementation 'org.commonmark:commonmark-ext-autolink:0.21.0'
     // Fileserver reactive transport. Only the WebFlux framework and Reactor core are declared —
     // deliberately not spring-boot-starter-webflux, which would put a second embedded server
     // (reactor-netty) on the runtime classpath. DispatcherServlet stays present, so Spring Boot's
@@ -121,6 +135,225 @@ tasks.named('check') {
     dependsOn tasks.named('webSecurityBoundaryTest')
 }
 
+// ---------------------------------------------------------------------------
+// 계약 union -> 생성 코드 배선 (슬라이스 2 선행 / spec §5.2 보강).
+//
+// 문제: useOneOfInterfaces=false 는 컴파일은 통과시키지만 discriminator union이 Jackson
+// 양방향 모두 계약을 위반한다(역직렬화 InvalidTypeIdException, 직렬화는 kind 대신 클래스
+// simple name). useOneOfInterfaces=true 는 SpringCodegen이 union interface의 discriminator
+// getter를 String으로 고정해 컴파일이 깨진다 — 계약 쪽으로 우회 불가(Plan 01 task-4-report).
+//
+// 해법: 계약 원본은 그대로 두고, 생성 직전에 사본을 파생시킨다.
+//   (1) oneOf + discriminator 를 가진 스키마 S 의 각 하위 타입에 `x-implements: [S]` 를 주입한다
+//       -> 생성된 하위 타입이 `implements S` 로 나온다(7.18.0에서 실측 확인).
+//   (2) S 자체의 생성은 ignore 시키고, 같은 package 에 Jackson 다형성 애너테이션을 단
+//       Java interface 로 이 태스크가 직접 써 넣는다.
+//   (3) 모든 분기가 `type: string` 인 이름 없는 oneOf 는 `type: string` 으로 접는다.
+//       접지 않으면 생성기가 필드가 하나도 없는 껍데기 클래스를 만든다
+//       (WorkingCopyInputBase.slug -> WorkingCopyInputBaseSlug: 실측 확인). 그 결과
+//       slug 가 문자열이 아니라 `{}` 로 직렬화되어 계약을 위반한다.
+//
+// 파생 규칙은 계약의 `oneOf`/`discriminator.mapping` 에서 전부 읽어낸다 — union 목록을
+// 손으로 관리하지 않으므로 계약에 union이 추가돼도 따라온다.
+//
+// snakeyaml 은 org.openapi.generator 플러그인이 buildscript classpath 로 이미 가져온다
+// (swagger-parser 경유, 2.4 — 실측 확인).
+// ---------------------------------------------------------------------------
+ext.studioModelPackage = 'dev.caskeleton.adapter.inbound.web.techlog.studio.api.model'
+ext.studioCodegenSpecFile = layout.buildDirectory.file('openapi/studio-v1-codegen.yaml')
+ext.studioCodegenIgnoreFile = layout.buildDirectory.file('openapi/.openapi-generator-ignore')
+ext.studioUnionSrcDir = layout.buildDirectory.dir('generated/openapi-unions/src/main/java')
+
+tasks.register('prepareStudioCodegenSpec') {
+    description = '계약에서 discriminator union 배선을 파생시켜 생성기 입력을 만든다.'
+    def specSource = file("${rootDir}/config/openapi/studio-v1.yaml")
+    def specOut = studioCodegenSpecFile
+    def ignoreOut = studioCodegenIgnoreFile
+    def unionDir = studioUnionSrcDir
+    def modelPackage = studioModelPackage
+    inputs.file(specSource)
+    outputs.file(specOut)
+    outputs.file(ignoreOut)
+    outputs.dir(unionDir)
+    doLast {
+        def doc = new org.yaml.snakeyaml.Yaml().load(specSource.getText('UTF-8'))
+        def schemas = doc.components.schemas
+
+        // (3) 전부 string 인 이름 없는 oneOf 접기
+        int[] collapsed = [0]
+        def collapseStringOneOf
+        collapseStringOneOf = { Object node ->
+            if (node instanceof Map) {
+                for (Object key : new ArrayList(node.keySet())) {
+                    def value = node.get(key)
+                    if (value instanceof Map && value.get('oneOf') instanceof List
+                            && !value.containsKey('discriminator')) {
+                        def branches = value.get('oneOf')
+                        if (!branches.isEmpty()
+                                && branches.every { it instanceof Map && it.get('type') == 'string' }) {
+                            def folded = new LinkedHashMap()
+                            folded.put('type', 'string')
+                            if (value.containsKey('description')) {
+                                folded.put('description', value.get('description'))
+                            }
+                            node.put(key, folded)
+                            collapsed[0]++
+                            continue
+                        }
+                    }
+                    collapseStringOneOf(value)
+                }
+            } else if (node instanceof List) {
+                node.each { collapseStringOneOf(it) }
+            }
+        }
+        collapseStringOneOf(doc)
+
+        // (4) `oneOf: [X, {type: null}]` 는 OpenAPI 3.1 이 nullable 을 적는 방식이다. 그대로 두면
+        // 생성기가 분기들을 병합한 <부모><필드> 래퍼 클래스를 새로 만들고(예: DocumentSummary.project 가
+        // DisplayTarget 이 아니라 PublicRenderModelBaseProject 가 된다), 같은 모양의 타입이 여러 벌
+        // 생겨 매핑 코드가 그 사이를 오가게 된다. Java 참조는 어차피 nullable 이라 손실이 없으므로
+        // null 분기를 지우고 남은 하나로 접는다.
+        int[] nullable = [0]
+        def collapseNullableOneOf
+        collapseNullableOneOf = { Object node ->
+            if (node instanceof Map) {
+                for (Object key : new ArrayList(node.keySet())) {
+                    def value = node.get(key)
+                    if (value instanceof Map && value.get('oneOf') instanceof List
+                            && !value.containsKey('discriminator')) {
+                        def branches = value.get('oneOf')
+                        def nulls = branches.findAll { it instanceof Map && it.get('type') == 'null' }
+                        def rest = branches - nulls
+                        if (!nulls.isEmpty() && rest.size() == 1 && rest[0] instanceof Map) {
+                            def folded = new LinkedHashMap(rest[0])
+                            if (value.containsKey('description') && !folded.containsKey('description')) {
+                                folded.put('description', value.get('description'))
+                            }
+                            node.put(key, folded)
+                            nullable[0]++
+                            continue
+                        }
+                    }
+                    collapseNullableOneOf(value)
+                }
+            } else if (node instanceof List) {
+                node.each { collapseNullableOneOf(it) }
+            }
+        }
+        collapseNullableOneOf(doc)
+
+        // (1) x-implements 주입 + union 목록 수집
+        def unions = [:]
+        schemas.each { String name, Object schema ->
+            if (!(schema instanceof Map)) return
+            def disc = schema.get('discriminator')
+            if (!(schema.get('oneOf') instanceof List) || !(disc instanceof Map)) return
+            def property = disc.get('propertyName')
+            def mapping = disc.get('mapping')
+            if (!property || !(mapping instanceof Map) || mapping.isEmpty()) {
+                throw new GradleException(
+                        "union ${name} 에 discriminator.propertyName 과 mapping 이 모두 있어야 한다 " +
+                        "— 없으면 Jackson @JsonSubTypes 의 type id 를 계약에서 유도할 수 없다.")
+            }
+            def variants = new LinkedHashMap()
+            mapping.each { String typeId, String ref ->
+                def variant = ref.tokenize('/').last()
+                if (!schemas.containsKey(variant)) {
+                    throw new GradleException("union ${name} 의 mapping 이 없는 스키마 ${variant} 를 가리킨다.")
+                }
+                variants.put(typeId, variant)
+            }
+            schema.get('oneOf').each { branch ->
+                if (branch instanceof Map && branch.get('$ref')) {
+                    def variant = branch.get('$ref').tokenize('/').last()
+                    if (!variants.containsValue(variant)) {
+                        throw new GradleException(
+                                "union ${name} 의 oneOf 분기 ${variant} 가 discriminator.mapping 에 없다 " +
+                                "— type id 를 알 수 없어 Jackson 배선을 파생시킬 수 없다.")
+                    }
+                }
+            }
+            variants.values().toSet().each { String variant ->
+                def target = schemas.get(variant)
+                def impls = target.get('x-implements')
+                if (impls == null) {
+                    target.put('x-implements', [name])
+                } else if (!impls.contains(name)) {
+                    target.put('x-implements', impls + [name])
+                }
+            }
+            unions.put(name, [property: property, variants: variants])
+        }
+        if (unions.isEmpty()) {
+            throw new GradleException('계약에서 discriminator union 을 하나도 찾지 못했다 — 파생 규칙이 깨졌다.')
+        }
+
+        // 파생 계약 쓰기
+        def dumperOptions = new org.yaml.snakeyaml.DumperOptions()
+        dumperOptions.defaultFlowStyle = org.yaml.snakeyaml.DumperOptions.FlowStyle.BLOCK
+        dumperOptions.width = 8192
+        def specFile = specOut.get().asFile
+        specFile.parentFile.mkdirs()
+        specFile.setText(new org.yaml.snakeyaml.Yaml(dumperOptions).dump(doc), 'UTF-8')
+
+        // union 클래스 생성 억제
+        def ignoreFile = ignoreOut.get().asFile
+        ignoreFile.setText(
+                (['# prepareStudioCodegenSpec 가 생성한다 — 손으로 고치지 않는다.',
+                  '# 이 파일들은 같은 package 의 Java interface 로 대체된다.']
+                        + unions.keySet().collect { "**/${it}.java" }).join('\n') + '\n',
+                'UTF-8')
+
+        // union interface 쓰기
+        def packageDir = new File(unionDir.get().asFile, modelPackage.replace('.', '/'))
+        project.delete(unionDir.get().asFile)
+        packageDir.mkdirs()
+        unions.each { String name, Object spec ->
+            def subtypes = spec.variants.collect { String typeId, String variant ->
+                "  @JsonSubTypes.Type(value = ${variant}.class, name = \"${typeId}\")"
+            }.join(',\n')
+            def source = """package ${modelPackage};
+
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+
+/**
+ * {@code ${name}} — 계약의 discriminator union. prepareStudioCodegenSpec 가 계약의
+ * {@code oneOf} + {@code discriminator.mapping} 에서 파생한다. 손으로 고치지 않는다.
+ *
+ * <p>{@code As.EXISTING_PROPERTY} 다 — 하위 타입이 {@code ${spec.property}} 를 자기 필드로
+ * 이미 직렬화하므로 Jackson 이 판별 필드를 한 번 더 쓰면 키가 중복된다.
+ */
+@JsonTypeInfo(
+    use = JsonTypeInfo.Id.NAME,
+    include = JsonTypeInfo.As.EXISTING_PROPERTY,
+    property = "${spec.property}",
+    visible = true)
+@JsonSubTypes({
+${subtypes}
+})
+public interface ${name} {}
+"""
+            new File(packageDir, "${name}.java").setText(source, 'UTF-8')
+        }
+
+        logger.lifecycle(
+                "prepareStudioCodegenSpec: union ${unions.size()}개 파생(${unions.keySet().join(', ')}), " +
+                "string oneOf ${collapsed[0]}건 · nullable oneOf ${nullable[0]}건 접음")
+    }
+}
+
+// openApiGenerate 는 확장(extension) 이름이자 태스크 이름이다 — 위 블록은 확장 설정이라
+// dependsOn 을 받지 못한다. 태스크 쪽에 건다.
+tasks.named('openApiGenerate') {
+    dependsOn tasks.named('prepareStudioCodegenSpec')
+    // openapi-generator 는 outputDir 를 비우지 않는다 — 계약에서 스키마가 사라져도 직전
+    // 실행의 .java 가 그대로 남아 컴파일에 성공하고, 그래서 드리프트가 아니라 정상으로 보인다
+    // (이 배선을 넣는 과정에서 실제로 겪음: 삭제됐어야 할 union 6개가 남아 있었다).
+    doFirst { project.delete(layout.buildDirectory.dir('generated/openapi')) }
+}
+
 // ---------------------------------------------------------------------------
 // Studio 계약 DTO 생성 (ADR-004 / ADR-006).
 //
@@ -155,16 +388,24 @@ tasks.named('check') {
 // ---------------------------------------------------------------------------
 openApiGenerate {
     generatorName = 'spring'
-    inputSpec = "${rootDir}/config/openapi/studio-v1.yaml".toString()
+    // 원본이 아니라 prepareStudioCodegenSpec 가 파생한 사본을 먹인다 — 이유는 그 태스크의 주석 참고.
+    inputSpec = studioCodegenSpecFile.get().asFile.path
+    ignoreFileOverride = studioCodegenIgnoreFile.get().asFile.path
     outputDir = layout.buildDirectory.dir('generated/openapi').get().asFile.path
-    modelPackage = 'dev.caskeleton.adapter.inbound.web.techlog.studio.api.model'
+    modelPackage = studioModelPackage
     globalProperties.set(['models': ''])
     generateModelTests = false
     generateModelDocumentation = false
     configOptions = [
             useSpringBoot3: 'true',
             useJakartaEe: 'true',
-            openApiNullable: 'true',
+            // false 다. openApiNullable=true 는 nullable 필드를 JsonNullable<T> 로 만드는데,
+            // 그 타입을 읽는 모듈(org.openapitools:jackson-databind-nullable)은 Jackson 2 용이고
+            // 이 앱의 HTTP 변환기는 Jackson 3(tools.jackson, Spring Boot 4 기본)다 — 모듈이
+            // 등록될 수 없어 JsonNullable 이 그냥 POJO 로 직렬화되고 역직렬화는 깨진다.
+            // 계약이 이 필드들을 required 로 두므로(예: questionStatus, decisionStatus)
+            // "없음"과 "null" 을 구분할 필요도 없다. 평범한 nullable 필드로 생성한다.
+            openApiNullable: 'false',
             useOneOfInterfaces: 'false',
     ]
 }

src/adapter/inbound/web/gradle.lockfile

@@ -91,6 +91,10 @@ org.codehaus.plexus:plexus-classworlds:2.6.0=checkstyle
 org.codehaus.plexus:plexus-component-annotations:2.1.0=checkstyle
 org.codehaus.plexus:plexus-container-default:2.1.0=checkstyle
 org.codehaus.plexus:plexus-utils:3.3.0=checkstyle
+org.commonmark:commonmark-ext-autolink:0.21.0=compileClasspath,generatedOpenapiCompileClasspath,generatedOpenapiRuntimeClasspath,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
+org.commonmark:commonmark-ext-gfm-strikethrough:0.21.0=compileClasspath,generatedOpenapiCompileClasspath,generatedOpenapiRuntimeClasspath,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
+org.commonmark:commonmark-ext-gfm-tables:0.21.0=compileClasspath,generatedOpenapiCompileClasspath,generatedOpenapiRuntimeClasspath,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
+org.commonmark:commonmark:0.21.0=compileClasspath,generatedOpenapiCompileClasspath,generatedOpenapiRuntimeClasspath,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
 org.dom4j:dom4j:2.2.0=spotbugs
 org.hamcrest:hamcrest:3.0=testCompileClasspath,testRuntimeClasspath
 org.hibernate.validator:hibernate-validator:9.0.1.Final=compileClasspath,generatedOpenapiCompileClasspath,generatedOpenapiRuntimeClasspath,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
@@ -108,6 +112,7 @@ org.junit:junit-bom:6.0.1=testCompileClasspath,testRuntimeClasspath
 org.junit:junit-bom:6.1.0=spotbugs
 org.mockito:mockito-core:5.20.0=mockitoAgent,testCompileClasspath,testRuntimeClasspath
 org.mockito:mockito-junit-jupiter:5.20.0=testCompileClasspath,testRuntimeClasspath
+org.nibor.autolink:autolink:0.10.0=compileClasspath,generatedOpenapiCompileClasspath,generatedOpenapiRuntimeClasspath,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
 org.objenesis:objenesis:3.3=testRuntimeClasspath
 org.openapitools:jackson-databind-nullable:0.2.6=compileClasspath,generatedOpenapiCompileClasspath,generatedOpenapiRuntimeClasspath,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
 org.opentest4j:opentest4j:1.3.0=testCompileClasspath,testRuntimeClasspath

src/adapter/inbound/web/src/main/java/dev/caskeleton/adapter/inbound/web/techlog/studio/controller/StudioAssetController.java

@@ -0,0 +1,220 @@
+package dev.caskeleton.adapter.inbound.web.techlog.studio.controller;
+
+import dev.caskeleton.adapter.inbound.web.auth.AuthenticatedPrincipal;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.Asset;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.AssetDetail;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.AssetKind;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.AssetManagementStatus;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.AssetPage;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.UpdateAssetCommand;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.mapper.StudioDetailMapper;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.support.StudioCursors;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.support.StudioIdempotency;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.support.StudioPrincipals;
+import dev.caskeleton.application.techlog.error.StudioError;
+import dev.caskeleton.application.techlog.error.StudioException;
+import dev.caskeleton.application.techlog.studio.command.DeleteAssetCommand;
+import dev.caskeleton.application.techlog.studio.command.UploadAssetCommand;
+import dev.caskeleton.application.techlog.studio.model.AssetKindView;
+import dev.caskeleton.application.techlog.studio.model.AssetManagementStatusView;
+import dev.caskeleton.application.techlog.studio.query.DocumentCursorPosition;
+import dev.caskeleton.application.techlog.studio.query.GetAssetQuery;
+import dev.caskeleton.application.techlog.studio.query.ListAssetsQuery;
+import dev.caskeleton.application.techlog.studio.service.DeleteStudioAssetUseCase;
+import dev.caskeleton.application.techlog.studio.service.GetStudioAssetUseCase;
+import dev.caskeleton.application.techlog.studio.service.ListStudioAssetsUseCase;
+import dev.caskeleton.application.techlog.studio.service.UpdateStudioAssetUseCase;
+import dev.caskeleton.application.techlog.studio.service.UploadStudioAssetUseCase;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.validation.Valid;
+import java.io.IOException;
+import java.util.UUID;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.security.core.annotation.AuthenticationPrincipal;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.multipart.MultipartFile;
+
+/**
+ * 계약 {@code studio-v1.yaml}의 Assets 다섯 operation.
+ *
+ * <p>메서드 이름이 곧 {@code operationId}다 — {@code StudioContractDriftTest}가 대조한다.
+ */
+@RestController
+public class StudioAssetController {
+
+  private final ListStudioAssetsUseCase listAssets;
+  private final UploadStudioAssetUseCase uploadAsset;
+  private final GetStudioAssetUseCase getAsset;
+  private final UpdateStudioAssetUseCase updateAsset;
+  private final DeleteStudioAssetUseCase deleteAsset;
+  private final StudioDetailMapper detailMapper;
+  private final StudioCursors cursors;
+  private final StudioIdempotency idempotency;
+
+  public StudioAssetController(
+      ListStudioAssetsUseCase listAssets,
+      UploadStudioAssetUseCase uploadAsset,
+      GetStudioAssetUseCase getAsset,
+      UpdateStudioAssetUseCase updateAsset,
+      DeleteStudioAssetUseCase deleteAsset,
+      StudioDetailMapper detailMapper,
+      StudioCursors cursors,
+      StudioIdempotency idempotency) {
+    this.listAssets = listAssets;
+    this.uploadAsset = uploadAsset;
+    this.getAsset = getAsset;
+    this.updateAsset = updateAsset;
+    this.deleteAsset = deleteAsset;
+    this.detailMapper = detailMapper;
+    this.cursors = cursors;
+    this.idempotency = idempotency;
+  }
+
+  @GetMapping("/v1/studio/assets")
+  public AssetPage listStudioAssets(
+      @RequestParam(value = "q", required = false) String query,
+      @RequestParam(value = "kind", required = false) AssetKind kind,
+      @RequestParam(value = "managementStatus", required = false) AssetManagementStatus status,
+      @RequestParam(value = "cursor", required = false) String cursor,
+      @RequestParam(value = "limit", defaultValue = "20") int limit) {
+
+    String fingerprint =
+        StudioCursors.fingerprint(
+            query,
+            kind == null ? null : kind.getValue(),
+            status == null ? null : status.getValue());
+    DocumentCursorPosition position =
+        cursor == null || cursor.isBlank() ? null : cursors.decode(cursor, fingerprint, false);
+
+    var page =
+        listAssets.handle(
+            new ListAssetsQuery(
+                query,
+                kind == null ? null : AssetKindView.valueOf(kind.getValue()),
+                status == null ? null : AssetManagementStatusView.valueOf(status.getValue()),
+                position == null ? null : position.updatedAt(),
+                position == null ? null : position.id(),
+                limit));
+
+    AssetPage body = detailMapper.toApi(page);
+    body.setNextCursor(
+        page.nextCursor() == null ? null : cursors.encode(page.nextCursor(), fingerprint));
+    return body;
+  }
+
+  @PostMapping(value = "/v1/studio/assets", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
+  public ResponseEntity<Asset> uploadStudioAsset(
+      @RequestParam("file") MultipartFile file,
+      @RequestParam("kind") AssetKind kind,
+      @RequestParam(value = "altText", required = false) String altText,
+      @RequestParam(value = "decorative", defaultValue = "false") boolean decorative,
+      @AuthenticationPrincipal AuthenticatedPrincipal principal,
+      HttpServletRequest request) {
+
+    byte[] content;
+    try {
+      content = file.getBytes();
+    } catch (IOException e) {
+      throw StudioException.of(
+          StudioError.REQUEST_VALIDATION_FAILED, "the uploaded file could not be read");
+    }
+
+    StudioIdempotency.Outcome<Asset> outcome =
+        idempotency.run(
+            request,
+            "uploadStudioAsset",
+            // 바이트 전체가 아니라 파일명·크기·종류로 지문을 만든다 — 20MB 를 다시 직렬화해 해시하면
+            // 업로드마다 그만큼을 한 번 더 읽고 쓰는 셈이 된다.
+            java.util.List.of(
+                String.valueOf(file.getOriginalFilename()),
+                String.valueOf(file.getSize()),
+                kind.getValue()),
+            Asset.class,
+            () ->
+                detailMapper.toApi(
+                    uploadAsset.handle(
+                        new UploadAssetCommand(
+                            file.getOriginalFilename(),
+                            file.getContentType(),
+                            content,
+                            AssetKindView.valueOf(kind.getValue()),
+                            altText,
+                            decorative,
+                            StudioPrincipals.require(principal)))));
+
+    return ResponseEntity.status(HttpStatus.CREATED)
+        .header(StudioIdempotency.IDEMPOTENCY_REPLAYED, Boolean.toString(outcome.replayed()))
+        .body(outcome.result());
+  }
+
+  @GetMapping("/v1/studio/assets/{assetId}")
+  public AssetDetail getStudioAsset(@PathVariable("assetId") UUID assetId) {
+    return detailMapper.toApi(getAsset.handle(new GetAssetQuery(assetId)));
+  }
+
+  @PutMapping("/v1/studio/assets/{assetId}")
+  public ResponseEntity<Asset> updateStudioAsset(
+      @PathVariable("assetId") UUID assetId,
+      @Valid @RequestBody UpdateAssetCommand command,
+      @AuthenticationPrincipal AuthenticatedPrincipal principal,
+      HttpServletRequest request) {
+
+    StudioIdempotency.Outcome<Asset> outcome =
+        idempotency.run(
+            request,
+            "updateStudioAsset",
+            command,
+            Asset.class,
+            () ->
+                detailMapper.toApi(
+                    updateAsset.handle(
+                        new dev.caskeleton.application.techlog.studio.command.UpdateAssetCommand(
+                            assetId,
+                            command.getExpectedVersion() == null
+                                ? 0L
+                                : command.getExpectedVersion(),
+                            command.getKind() == null
+                                ? null
+                                : AssetKindView.valueOf(command.getKind().getValue()),
+                            command.getAltText(),
+                            command.getAltText() != null,
+                            command.getDecorative(),
+                            command.getManagementStatus() == null
+                                ? null
+                                : AssetManagementStatusView.valueOf(
+                                    command.getManagementStatus().getValue()),
+                            StudioPrincipals.require(principal)))));
+
+    return ResponseEntity.ok()
+        .header(StudioIdempotency.IDEMPOTENCY_REPLAYED, Boolean.toString(outcome.replayed()))
+        .body(outcome.result());
+  }
+
+  @DeleteMapping("/v1/studio/assets/{assetId}")
+  public ResponseEntity<Void> deleteStudioAsset(
+      @PathVariable("assetId") UUID assetId,
+      @AuthenticationPrincipal AuthenticatedPrincipal principal,
+      HttpServletRequest request) {
+
+    idempotency.run(
+        request,
+        "deleteStudioAsset",
+        assetId.toString(),
+        Void.class,
+        () -> {
+          deleteAsset.handle(new DeleteAssetCommand(assetId, StudioPrincipals.require(principal)));
+          return null;
+        });
+    // 계약은 204 다. 본문이 없으므로 EnvelopeBodyAdvice 도 감쌀 것이 없다.
+    return ResponseEntity.noContent().build();
+  }
+}

src/adapter/inbound/web/src/main/java/dev/caskeleton/adapter/inbound/web/techlog/studio/controller/StudioDocumentController.java

@@ -0,0 +1,226 @@
+package dev.caskeleton.adapter.inbound.web.techlog.studio.controller;
+
+import dev.caskeleton.adapter.inbound.web.auth.AuthenticatedPrincipal;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.DocumentPage;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.NextAction;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.PublicationStatus;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.RecordKind;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.SaveDocumentCommand;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.WorkingCopy;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.WorkingCopyDetail;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.WorkingCopyInput;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.mapper.StudioDetailMapper;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.mapper.StudioRequestMapper;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.mapper.StudioResponseMapper;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.support.StudioCursors;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.support.StudioIdempotency;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.support.StudioPrincipals;
+import dev.caskeleton.application.techlog.error.StudioError;
+import dev.caskeleton.application.techlog.error.StudioException;
+import dev.caskeleton.application.techlog.studio.command.CreateDocumentCommand;
+import dev.caskeleton.application.techlog.studio.model.DocumentPageView;
+import dev.caskeleton.application.techlog.studio.model.DocumentSort;
+import dev.caskeleton.application.techlog.studio.model.PublicationStatusView;
+import dev.caskeleton.application.techlog.studio.model.WorkingCopyDetailView;
+import dev.caskeleton.application.techlog.studio.model.WorkingCopyView;
+import dev.caskeleton.application.techlog.studio.query.DocumentCursorPosition;
+import dev.caskeleton.application.techlog.studio.query.GetDocumentQuery;
+import dev.caskeleton.application.techlog.studio.query.ListDocumentsQuery;
+import dev.caskeleton.application.techlog.studio.service.CreateStudioDocumentUseCase;
+import dev.caskeleton.application.techlog.studio.service.GetStudioDocumentUseCase;
+import dev.caskeleton.application.techlog.studio.service.ListStudioDocumentsUseCase;
+import dev.caskeleton.application.techlog.studio.service.SaveOutcome;
+import dev.caskeleton.application.techlog.studio.service.SaveStudioDocumentUseCase;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.validation.Valid;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.UUID;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.security.core.annotation.AuthenticationPrincipal;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * 계약 {@code studio-v1.yaml}의 Documents 네 operation.
+ *
+ * <p>메서드 이름이 곧 {@code operationId}다 — {@code StudioContractDriftTest}가 springdoc이 게시한 이름과 계약을 대조한다.
+ * 이름을 바꾸면 그 게이트가 빨간불이 된다.
+ *
+ * <p>반환값을 봉투로 감싸지 않는다 — {@code EnvelopeBodyAdvice}가 감싼다(ADR-006).
+ *
+ * <p>경로에 {@code /api}를 쓰지 않는다 — {@code PresentationWebConfig}가 {@code
+ * ca-skeleton.presentation.api-base-path}를 모든 매핑에 붙인다.
+ */
+@RestController
+public class StudioDocumentController {
+
+  private final ListStudioDocumentsUseCase listDocuments;
+  private final CreateStudioDocumentUseCase createDocument;
+  private final GetStudioDocumentUseCase getDocument;
+  private final SaveStudioDocumentUseCase saveDocument;
+  private final StudioDetailMapper detailMapper;
+  private final StudioCursors cursors;
+  private final StudioIdempotency idempotency;
+
+  public StudioDocumentController(
+      ListStudioDocumentsUseCase listDocuments,
+      CreateStudioDocumentUseCase createDocument,
+      GetStudioDocumentUseCase getDocument,
+      SaveStudioDocumentUseCase saveDocument,
+      StudioDetailMapper detailMapper,
+      StudioCursors cursors,
+      StudioIdempotency idempotency) {
+    this.listDocuments = listDocuments;
+    this.createDocument = createDocument;
+    this.getDocument = getDocument;
+    this.saveDocument = saveDocument;
+    this.detailMapper = detailMapper;
+    this.cursors = cursors;
+    this.idempotency = idempotency;
+  }
+
+  @GetMapping("/v1/studio/documents")
+  public DocumentPage listStudioDocuments(
+      @RequestParam(value = "q", required = false) String query,
+      @RequestParam(value = "kind", required = false) RecordKind kind,
+      @RequestParam(value = "publicationStatus", required = false)
+          PublicationStatus publicationStatus,
+      @RequestParam(value = "nextAction", required = false) NextAction nextAction,
+      @RequestParam(value = "projectId", required = false) UUID projectId,
+      @RequestParam(value = "sort", defaultValue = "UPDATED_DESC") String sort,
+      @RequestParam(value = "cursor", required = false) String cursor,
+      @RequestParam(value = "limit", defaultValue = "20") int limit) {
+
+    DocumentSort documentSort = documentSort(sort);
+    // 지문에 정렬까지 넣는다 — 정렬만 바꾸고 커서를 재사용하면 커서가 가리키는 키의 의미가 달라진다.
+    String fingerprint =
+        StudioCursors.fingerprint(
+            query,
+            kind == null ? null : kind.getValue(),
+            publicationStatus == null ? null : publicationStatus.getValue(),
+            nextAction == null ? null : nextAction.getValue(),
+            projectId == null ? null : projectId.toString(),
+            documentSort.name());
+    DocumentCursorPosition position =
+        cursor == null || cursor.isBlank()
+            ? null
+            : cursors.decode(cursor, fingerprint, documentSort == DocumentSort.TITLE_ASC);
+
+    DocumentPageView page =
+        listDocuments.handle(
+            new ListDocumentsQuery(
+                query,
+                kind == null
+                    ? null
+                    : dev.caskeleton.application.techlog.studio.model.RecordKind.valueOf(
+                        kind.getValue()),
+                publicationStatus == null
+                    ? null
+                    : PublicationStatusView.valueOf(publicationStatus.getValue()),
+                nextAction == null
+                    ? null
+                    : dev.caskeleton.application.techlog.studio.model.NextAction.valueOf(
+                        nextAction.getValue()),
+                projectId,
+                documentSort,
+                position,
+                limit));
+
+    DocumentPage body = StudioResponseMapper.toApi(page);
+    // 어댑터가 준 것은 다음 쪽의 시작 위치일 뿐이다. 클라이언트에 나가는 것은 서명된 opaque 값이어야 한다.
+    body.setNextCursor(
+        page.nextCursor() == null ? null : cursors.encode(page.nextCursor(), fingerprint));
+    return body;
+  }
+
+  @PostMapping("/v1/studio/documents")
+  public ResponseEntity<WorkingCopy> createStudioDocument(
+      @Valid @RequestBody WorkingCopyInput document,
+      @AuthenticationPrincipal AuthenticatedPrincipal principal,
+      HttpServletRequest request) {
+
+    StudioIdempotency.Outcome<WorkingCopy> outcome =
+        idempotency.run(
+            request,
+            "createStudioDocument",
+            document,
+            WorkingCopy.class,
+            () -> {
+              WorkingCopyView created =
+                  createDocument.handle(
+                      new CreateDocumentCommand(
+                          StudioRequestMapper.toApplication(document),
+                          StudioPrincipals.require(principal)));
+              return StudioResponseMapper.toApi(created);
+            });
+
+    return ResponseEntity.status(HttpStatus.CREATED)
+        .header(StudioIdempotency.IDEMPOTENCY_REPLAYED, Boolean.toString(outcome.replayed()))
+        .body(outcome.result());
+  }
+
+  @GetMapping("/v1/studio/documents/{documentId}")
+  public WorkingCopyDetail getStudioDocument(@PathVariable("documentId") UUID documentId) {
+    return detailMapper.toApi(getDocument.handle(new GetDocumentQuery(documentId)));
+  }
+
+  @PutMapping("/v1/studio/documents/{documentId}")
+  public ResponseEntity<WorkingCopyDetail> saveStudioDocument(
+      @PathVariable("documentId") UUID documentId,
+      @Valid @RequestBody SaveDocumentCommand command,
+      @AuthenticationPrincipal AuthenticatedPrincipal principal,
+      HttpServletRequest request) {
+
+    StudioIdempotency.Outcome<WorkingCopyDetail> outcome =
+        idempotency.run(
+            request,
+            "saveStudioDocument",
+            command,
+            WorkingCopyDetail.class,
+            () -> {
+              SaveOutcome saved =
+                  saveDocument.handle(
+                      new dev.caskeleton.application.techlog.studio.command.SaveDocumentCommand(
+                          documentId,
+                          command.getExpectedVersion() == null ? 0 : command.getExpectedVersion(),
+                          StudioRequestMapper.toApplication(command.getDocument()),
+                          StudioPrincipals.require(principal)));
+              return switch (saved) {
+                case SaveOutcome.Saved value -> detailMapper.toApi(value.detail());
+                case SaveOutcome.VersionConflict value -> throw versionConflict(value.latest());
+              };
+            });
+
+    return ResponseEntity.ok()
+        .header(StudioIdempotency.IDEMPOTENCY_REPLAYED, Boolean.toString(outcome.replayed()))
+        .body(outcome.result());
+  }
+
+  /**
+   * 계약의 {@code VersionConflictDetails}는 {@code latestDocument}로 현재 상태 전체를 함께 준다 — 클라이언트가 다시 조회하지
+   * 않고도 충돌 화면을 그릴 수 있어야 한다.
+   */
+  private StudioException versionConflict(WorkingCopyDetailView latest) {
+    Map<String, Object> details = new LinkedHashMap<>();
+    details.put("latestDocument", detailMapper.toApi(latest));
+    return StudioException.withDetails(
+        StudioError.VERSION_CONFLICT, "expectedVersion does not match the stored version", details);
+  }
+
+  private static DocumentSort documentSort(String sort) {
+    try {
+      return DocumentSort.valueOf(sort);
+    } catch (IllegalArgumentException e) {
+      throw StudioException.of(
+          StudioError.REQUEST_VALIDATION_FAILED,
+          "sort must be one of UPDATED_DESC, UPDATED_ASC, TITLE_ASC");
+    }
+  }
+}

src/adapter/inbound/web/src/main/java/dev/caskeleton/adapter/inbound/web/techlog/studio/controller/StudioPreviewController.java

@@ -0,0 +1,121 @@
+package dev.caskeleton.adapter.inbound.web.techlog.studio.controller;
+
+import dev.caskeleton.adapter.inbound.web.auth.AuthenticatedPrincipal;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.CreatePreviewCommand;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.PreviewDetail;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.PublicPreview;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.ValidateDocumentCommand;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.ValidationReport;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.mapper.StudioDetailMapper;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.support.StudioIdempotency;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.support.StudioPrincipals;
+import dev.caskeleton.application.techlog.studio.query.GetPreviewQuery;
+import dev.caskeleton.application.techlog.studio.service.CreateStudioPreviewUseCase;
+import dev.caskeleton.application.techlog.studio.service.GetCurrentStudioPreviewUseCase;
+import dev.caskeleton.application.techlog.studio.service.ValidateStudioDocumentUseCase;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.validation.Valid;
+import java.util.UUID;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.security.core.annotation.AuthenticationPrincipal;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * 계약 {@code studio-v1.yaml}의 Validation / Preview 세 operation.
+ *
+ * <p>메서드 이름이 곧 {@code operationId}다 — {@code StudioContractDriftTest}가 대조한다.
+ */
+@RestController
+public class StudioPreviewController {
+
+  private final ValidateStudioDocumentUseCase validateDocument;
+  private final CreateStudioPreviewUseCase createPreview;
+  private final GetCurrentStudioPreviewUseCase getPreview;
+  private final StudioDetailMapper detailMapper;
+  private final StudioIdempotency idempotency;
+
+  public StudioPreviewController(
+      ValidateStudioDocumentUseCase validateDocument,
+      CreateStudioPreviewUseCase createPreview,
+      GetCurrentStudioPreviewUseCase getPreview,
+      StudioDetailMapper detailMapper,
+      StudioIdempotency idempotency) {
+    this.validateDocument = validateDocument;
+    this.createPreview = createPreview;
+    this.getPreview = getPreview;
+    this.detailMapper = detailMapper;
+    this.idempotency = idempotency;
+  }
+
+  @PostMapping("/v1/studio/documents/{documentId}/validate")
+  public ResponseEntity<ValidationReport> validateStudioDocument(
+      @PathVariable("documentId") UUID documentId,
+      @Valid @RequestBody ValidateDocumentCommand command,
+      @AuthenticationPrincipal AuthenticatedPrincipal principal,
+      HttpServletRequest request) {
+
+    StudioIdempotency.Outcome<ValidationReport> outcome =
+        idempotency.run(
+            request,
+            "validateStudioDocument",
+            command,
+            ValidationReport.class,
+            () ->
+                detailMapper.toApi(
+                    validateDocument.handle(
+                        new dev.caskeleton.application.techlog.studio.command
+                            .ValidateDocumentCommand(
+                            documentId,
+                            expectedVersion(command.getExpectedVersion()),
+                            StudioPrincipals.require(principal)))));
+
+    return ResponseEntity.ok()
+        .header(StudioIdempotency.IDEMPOTENCY_REPLAYED, Boolean.toString(outcome.replayed()))
+        .body(outcome.result());
+  }
+
+  @GetMapping("/v1/studio/documents/{documentId}/preview")
+  public PreviewDetail getCurrentStudioPreview(@PathVariable("documentId") UUID documentId) {
+    return detailMapper.toApi(getPreview.handle(new GetPreviewQuery(documentId)));
+  }
+
+  @PostMapping("/v1/studio/documents/{documentId}/preview")
+  public ResponseEntity<PublicPreview> createStudioPreview(
+      @PathVariable("documentId") UUID documentId,
+      @Valid @RequestBody CreatePreviewCommand command,
+      @AuthenticationPrincipal AuthenticatedPrincipal principal,
+      HttpServletRequest request) {
+
+    StudioIdempotency.Outcome<PublicPreview> outcome =
+        idempotency.run(
+            request,
+            "createStudioPreview",
+            command,
+            PublicPreview.class,
+            () ->
+                detailMapper.toApi(
+                    createPreview.handle(
+                        new dev.caskeleton.application.techlog.studio.command.CreatePreviewCommand(
+                            documentId,
+                            expectedVersion(command.getExpectedVersion()),
+                            command.getValidationId(),
+                            StudioPrincipals.require(principal)))));
+
+    return ResponseEntity.status(HttpStatus.CREATED)
+        .header(StudioIdempotency.IDEMPOTENCY_REPLAYED, Boolean.toString(outcome.replayed()))
+        .body(outcome.result());
+  }
+
+  /**
+   * 계약상 required 지만 null 을 실어 보내는 클라이언트를 500 으로 떨어뜨리지 않는다 — 0 은 어떤 저장된 버전과도 일치하지 않아
+   * VERSION_CONFLICT 로 나간다.
+   */
+  private static long expectedVersion(Integer value) {
+    return value == null ? 0L : value;
+  }
+}

src/adapter/inbound/web/src/main/java/dev/caskeleton/adapter/inbound/web/techlog/studio/controller/StudioPublicationController.java

@@ -0,0 +1,177 @@
+package dev.caskeleton.adapter.inbound.web.techlog.studio.controller;
+
+import dev.caskeleton.adapter.inbound.web.auth.AuthenticatedPrincipal;
+import dev.caskeleton.adapter.inbound.web.http.ApiHeaders;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.PublicationEventType;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.PublicationPage;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.PublicationSnapshot;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.PublishDocumentCommand;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.PublishResult;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.StudioDashboard;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.UnpublishCommand;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.mapper.StudioDetailMapper;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.support.StudioCursors;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.support.StudioIdempotency;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.support.StudioPrincipals;
+import dev.caskeleton.application.techlog.studio.command.UnpublishPublicationCommand;
+import dev.caskeleton.application.techlog.studio.model.PublicationEventTypeView;
+import dev.caskeleton.application.techlog.studio.query.DocumentCursorPosition;
+import dev.caskeleton.application.techlog.studio.query.GetDashboardQuery;
+import dev.caskeleton.application.techlog.studio.query.GetSnapshotQuery;
+import dev.caskeleton.application.techlog.studio.query.ListPublicationsQuery;
+import dev.caskeleton.application.techlog.studio.service.GetStudioDashboardUseCase;
+import dev.caskeleton.application.techlog.studio.service.GetStudioPublicationSnapshotUseCase;
+import dev.caskeleton.application.techlog.studio.service.ListStudioPublicationsUseCase;
+import dev.caskeleton.application.techlog.studio.service.PublishStudioDocumentUseCase;
+import dev.caskeleton.application.techlog.studio.service.UnpublishStudioPublicationUseCase;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.validation.Valid;
+import java.util.List;
+import java.util.UUID;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.security.core.annotation.AuthenticationPrincipal;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * 계약 {@code studio-v1.yaml}의 Publication / Dashboard 다섯 operation.
+ *
+ * <p>메서드 이름이 곧 {@code operationId}다 — {@code StudioContractDriftTest}가 대조한다.
+ */
+@RestController
+public class StudioPublicationController {
+
+  private final PublishStudioDocumentUseCase publishDocument;
+  private final UnpublishStudioPublicationUseCase unpublishPublication;
+  private final ListStudioPublicationsUseCase listPublications;
+  private final GetStudioPublicationSnapshotUseCase getSnapshot;
+  private final GetStudioDashboardUseCase getDashboard;
+  private final StudioDetailMapper detailMapper;
+  private final StudioCursors cursors;
+  private final StudioIdempotency idempotency;
+
+  public StudioPublicationController(
+      PublishStudioDocumentUseCase publishDocument,
+      UnpublishStudioPublicationUseCase unpublishPublication,
+      ListStudioPublicationsUseCase listPublications,
+      GetStudioPublicationSnapshotUseCase getSnapshot,
+      GetStudioDashboardUseCase getDashboard,
+      StudioDetailMapper detailMapper,
+      StudioCursors cursors,
+      StudioIdempotency idempotency) {
+    this.publishDocument = publishDocument;
+    this.unpublishPublication = unpublishPublication;
+    this.listPublications = listPublications;
+    this.getSnapshot = getSnapshot;
+    this.getDashboard = getDashboard;
+    this.detailMapper = detailMapper;
+    this.cursors = cursors;
+    this.idempotency = idempotency;
+  }
+
+  @GetMapping("/v1/studio/dashboard")
+  public StudioDashboard getStudioDashboard() {
+    return detailMapper.toApi(getDashboard.handle(new GetDashboardQuery()));
+  }
+
+  @PostMapping("/v1/studio/documents/{documentId}/publish")
+  public ResponseEntity<PublishResult> publishStudioDocument(
+      @PathVariable("documentId") UUID documentId,
+      @Valid @RequestBody PublishDocumentCommand command,
+      @AuthenticationPrincipal AuthenticatedPrincipal principal,
+      HttpServletRequest request) {
+
+    // 게시 Event 에 최초 요청의 key 를 남긴다 — 재시도가 중복 Event 를 만들지 않았음을 이력에서
+    // 되짚을 수 있어야 한다(V7 publication_event.idempotency_key 주석).
+    String idempotencyKey = request.getHeader(ApiHeaders.IDEMPOTENCY_KEY);
+
+    StudioIdempotency.Outcome<PublishResult> outcome =
+        idempotency.run(
+            request,
+            "publishStudioDocument",
+            command,
+            PublishResult.class,
+            () ->
+                detailMapper.toApi(
+                    publishDocument.handle(
+                        new dev.caskeleton.application.techlog.studio.command
+                            .PublishDocumentCommand(
+                            documentId,
+                            expectedVersion(command.getExpectedVersion()),
+                            command.getValidationId(),
+                            command.getPreviewId(),
+                            List.copyOf(command.getAcknowledgedWarningCodes()),
+                            idempotencyKey,
+                            StudioPrincipals.require(principal)))));
+
+    return ResponseEntity.status(HttpStatus.CREATED)
+        .header(StudioIdempotency.IDEMPOTENCY_REPLAYED, Boolean.toString(outcome.replayed()))
+        .body(outcome.result());
+  }
+
+  @GetMapping("/v1/studio/publications")
+  public PublicationPage listStudioPublications(
+      @RequestParam(value = "type", required = false) PublicationEventType type,
+      @RequestParam(value = "cursor", required = false) String cursor,
+      @RequestParam(value = "limit", defaultValue = "20") int limit) {
+
+    String fingerprint = StudioCursors.fingerprint(type == null ? null : type.getValue());
+    DocumentCursorPosition position =
+        cursor == null || cursor.isBlank() ? null : cursors.decode(cursor, fingerprint, false);
+
+    var page =
+        listPublications.handle(
+            new ListPublicationsQuery(
+                type == null ? null : PublicationEventTypeView.valueOf(type.getValue()),
+                position == null ? null : position.updatedAt(),
+                position == null ? null : position.id(),
+                limit));
+
+    PublicationPage body = detailMapper.toApi(page);
+    body.setNextCursor(
+        page.nextCursor() == null ? null : cursors.encode(page.nextCursor(), fingerprint));
+    return body;
+  }
+
+  @PostMapping("/v1/studio/publications/{publicationId}/unpublish")
+  public ResponseEntity<PublishResult> unpublishStudioPublication(
+      @PathVariable("publicationId") UUID publicationId,
+      @Valid @RequestBody UnpublishCommand command,
+      @AuthenticationPrincipal AuthenticatedPrincipal principal,
+      HttpServletRequest request) {
+
+    StudioIdempotency.Outcome<PublishResult> outcome =
+        idempotency.run(
+            request,
+            "unpublishStudioPublication",
+            command,
+            PublishResult.class,
+            () ->
+                detailMapper.toApi(
+                    unpublishPublication.handle(
+                        new UnpublishPublicationCommand(
+                            publicationId,
+                            expectedVersion(command.getExpectedPublicationRevision()),
+                            StudioPrincipals.require(principal)))));
+
+    return ResponseEntity.ok()
+        .header(StudioIdempotency.IDEMPOTENCY_REPLAYED, Boolean.toString(outcome.replayed()))
+        .body(outcome.result());
+  }
+
+  @GetMapping("/v1/studio/publications/{publicationEventId}/preview")
+  public PublicationSnapshot getStudioPublicationSnapshot(
+      @PathVariable("publicationEventId") UUID publicationEventId) {
+    return detailMapper.toApi(getSnapshot.handle(new GetSnapshotQuery(publicationEventId)));
+  }
+
+  /** 계약상 required 지만 null 을 실어 보내는 클라이언트를 500 으로 떨어뜨리지 않는다. */
+  private static long expectedVersion(Integer value) {
+    return value == null ? 0L : value;
+  }
+}

src/adapter/inbound/web/src/main/java/dev/caskeleton/adapter/inbound/web/techlog/studio/mapper/StudioDetailMapper.java

@@ -0,0 +1,262 @@
+package dev.caskeleton.adapter.inbound.web.techlog.studio.mapper;
+
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.Asset;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.AssetDetail;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.AssetKind;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.AssetManagementStatus;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.AssetPage;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.AssetUsage;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.DashboardTotals;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.NextAction;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.PreviewDetail;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.PublicPreview;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.PublicRenderModel;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.PublicationAction;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.PublicationAggregate;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.PublicationEvent;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.PublicationEventType;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.PublicationListItem;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.PublicationPage;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.PublicationSnapshot;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.PublishResult;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.RecordKind;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.StudioDashboard;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.ValidationIssue;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.ValidationReport;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.WorkingCopyDetail;
+import dev.caskeleton.application.techlog.studio.model.AssetDetailView;
+import dev.caskeleton.application.techlog.studio.model.AssetPageView;
+import dev.caskeleton.application.techlog.studio.model.AssetView;
+import dev.caskeleton.application.techlog.studio.model.DashboardView;
+import dev.caskeleton.application.techlog.studio.model.PreviewDetailView;
+import dev.caskeleton.application.techlog.studio.model.PublicPreviewView;
+import dev.caskeleton.application.techlog.studio.model.PublicationAggregateView;
+import dev.caskeleton.application.techlog.studio.model.PublicationEventView;
+import dev.caskeleton.application.techlog.studio.model.PublicationListItemView;
+import dev.caskeleton.application.techlog.studio.model.PublicationPageView;
+import dev.caskeleton.application.techlog.studio.model.PublicationSnapshotView;
+import dev.caskeleton.application.techlog.studio.model.PublishResultView;
+import dev.caskeleton.application.techlog.studio.model.ValidationReportView;
+import dev.caskeleton.application.techlog.studio.model.WorkingCopyDetailView;
+import dev.caskeleton.shared.error.MappingException;
+import org.springframework.stereotype.Component;
+import tools.jackson.core.JacksonException;
+import tools.jackson.databind.ObjectMapper;
+
+/**
+ * {@code WorkingCopyDetail} 조립. {@code getStudioDocument}, {@code saveStudioDocument}, 그리고 낙관적 잠금
+ * 충돌의 {@code VersionConflictDetails.latestDocument}가 모두 이 결과를 쓴다.
+ *
+ * <p>Spring 컴포넌트인 이유는 하나뿐이다 — 미리보기의 {@code renderModel}이 DB에 문자열로 저장되어 있어 계약 DTO로 되살리려면 매퍼가 필요하다.
+ */
+@Component
+public class StudioDetailMapper {
+
+  private final ObjectMapper objectMapper;
+
+  public StudioDetailMapper(ObjectMapper objectMapper) {
+    this.objectMapper = objectMapper;
+  }
+
+  public WorkingCopyDetail toApi(WorkingCopyDetailView view) {
+    WorkingCopyDetail detail = new WorkingCopyDetail();
+    detail.setDocument(StudioResponseMapper.toApi(view.document()));
+    detail.setCurrentValidation(toApi(view.currentValidation()));
+    detail.setLatestPreview(toApi(view.latestPreview()));
+    detail.setCurrentPublication(toApi(view.currentPublication()));
+    detail.setDependencyRevision(view.dependencyRevision());
+    detail.setNextAction(NextAction.fromValue(view.nextAction().name()));
+    return detail;
+  }
+
+  public ValidationReport toApi(ValidationReportView view) {
+    if (view == null) {
+      return null;
+    }
+    ValidationReport report = new ValidationReport();
+    report.setValidationId(view.validationId());
+    report.setDocumentId(view.documentId());
+    report.setValidatedVersion(Math.toIntExact(view.validatedVersion()));
+    report.setStatus(ValidationReport.StatusEnum.fromValue(view.status().name()));
+    report.setIssues(
+        view.issues().stream()
+            .map(
+                issue -> {
+                  ValidationIssue dto = new ValidationIssue();
+                  dto.setCode(issue.code());
+                  dto.setSeverity(ValidationIssue.SeverityEnum.fromValue(issue.severity().name()));
+                  dto.setPath(issue.path());
+                  dto.setMessage(issue.message());
+                  return dto;
+                })
+            .toList());
+    report.setValidatedAt(StudioResponseMapper.offsetDateTime(view.validatedAt()));
+    report.setValidUntil(StudioResponseMapper.offsetDateTime(view.validUntil()));
+    report.setDependencyRevision(view.dependencyRevision());
+    return report;
+  }
+
+  public PublicPreview toApi(PublicPreviewView view) {
+    if (view == null) {
+      return null;
+    }
+    PublicPreview preview = new PublicPreview();
+    preview.setPreviewId(view.previewId());
+    preview.setDocumentId(view.documentId());
+    preview.setPreviewVersion(Math.toIntExact(view.previewVersion()));
+    preview.setValidationId(view.validationId());
+    preview.setDependencyRevision(view.dependencyRevision());
+    preview.setCreatedAt(StudioResponseMapper.offsetDateTime(view.createdAt()));
+    preview.setExpiresAt(StudioResponseMapper.offsetDateTime(view.expiresAt()));
+    preview.setRenderModel(renderModel(view.renderModelJson()));
+    return preview;
+  }
+
+  public PublicationAggregate toApi(PublicationAggregateView view) {
+    if (view == null) {
+      return null;
+    }
+    PublicationAggregate aggregate = new PublicationAggregate();
+    aggregate.setPublicationId(view.publicationId());
+    aggregate.setDocumentId(view.documentId());
+    aggregate.setStatus(PublicationAggregate.StatusEnum.fromValue(view.status().name()));
+    aggregate.setPublishedVersion(Math.toIntExact(view.publishedVersion()));
+    aggregate.setPublicationRevision(Math.toIntExact(view.publicationRevision()));
+    aggregate.setLatestEventId(view.latestEventId());
+    aggregate.setPublicPath(view.publicPath());
+    aggregate.setUpdatedAt(StudioResponseMapper.offsetDateTime(view.updatedAt()));
+    return aggregate;
+  }
+
+  public PreviewDetail toApi(PreviewDetailView view) {
+    PreviewDetail detail = new PreviewDetail();
+    detail.setPreview(toApi(view.preview()));
+    detail.setState(PreviewDetail.StateEnum.fromValue(view.state().name()));
+    detail.setCurrentDocumentVersion(Math.toIntExact(view.currentDocumentVersion()));
+    detail.setCurrentValidationId(view.currentValidationId());
+    return detail;
+  }
+
+  public PublicationEvent toApi(PublicationEventView view) {
+    PublicationEvent event = new PublicationEvent();
+    event.setPublicationEventId(view.publicationEventId());
+    event.setPublicationId(view.publicationId());
+    event.setDocumentId(view.documentId());
+    event.setType(PublicationEventType.fromValue(view.type().name()));
+    event.setOccurredAt(StudioResponseMapper.offsetDateTime(view.occurredAt()));
+    event.setPublishedVersion(Math.toIntExact(view.publishedVersion()));
+    event.setSourcePublishedEventId(view.sourcePublishedEventId());
+    event.setSnapshotAvailable(view.snapshotAvailable());
+    return event;
+  }
+
+  public PublishResult toApi(PublishResultView view) {
+    PublishResult result = new PublishResult();
+    result.setPublication(toApi(view.publication()));
+    result.setEvent(toApi(view.event()));
+    return result;
+  }
+
+  public PublicationListItem toApi(PublicationListItemView view) {
+    PublicationListItem item = new PublicationListItem();
+    item.setEvent(toApi(view.event()));
+    item.setPublication(toApi(view.publication()));
+    item.setDocument(view.document() == null ? null : StudioResponseMapper.toApi(view.document()));
+    item.setAvailableActions(
+        view.availableActions().stream()
+            .map(action -> PublicationAction.fromValue(action.name()))
+            .collect(java.util.stream.Collectors.toCollection(java.util.LinkedHashSet::new)));
+    return item;
+  }
+
+  public PublicationPage toApi(PublicationPageView view) {
+    PublicationPage page = new PublicationPage();
+    page.setItems(view.items().stream().map(this::toApi).toList());
+    page.setNextCursor(view.nextCursor());
+    return page;
+  }
+
+  public PublicationSnapshot toApi(PublicationSnapshotView view) {
+    PublicationSnapshot snapshot = new PublicationSnapshot();
+    snapshot.setEvent(toApi(view.event()));
+    snapshot.setRenderModel(renderModel(view.renderModelJson()));
+    snapshot.setContentFormatVersion(view.contentFormatVersion());
+    snapshot.setRendererContractVersion(view.rendererContractVersion());
+    return snapshot;
+  }
+
+  public StudioDashboard toApi(DashboardView view) {
+    StudioDashboard dashboard = new StudioDashboard();
+    dashboard.setContinueWriting(
+        view.continueWriting().stream().map(StudioResponseMapper::toApi).toList());
+    dashboard.setReadyToPublish(
+        view.readyToPublish().stream().map(StudioResponseMapper::toApi).toList());
+    dashboard.setRecentPublications(view.recentPublications().stream().map(this::toApi).toList());
+    DashboardTotals totals = new DashboardTotals();
+    totals.setDocuments(view.totals().documents());
+    totals.setNeedsValidation(view.totals().needsValidation());
+    totals.setReadyToPublish(view.totals().readyToPublish());
+    totals.setPublications(view.totals().publications());
+    dashboard.setTotals(totals);
+    return dashboard;
+  }
+
+  public Asset toApi(AssetView view) {
+    Asset asset = new Asset();
+    asset.setId(view.id());
+    asset.setAssetKey(view.assetKey());
+    asset.setKind(AssetKind.fromValue(view.kind().name()));
+    asset.setMediaType(view.mediaType());
+    asset.setOriginalFilename(view.originalFilename());
+    asset.setByteSize(Math.toIntExact(view.byteSize()));
+    asset.setWidth(view.width());
+    asset.setHeight(view.height());
+    asset.setAltText(view.altText());
+    asset.setDecorative(view.decorative());
+    asset.setManagementStatus(AssetManagementStatus.fromValue(view.managementStatus().name()));
+    asset.setPublicPath(view.publicPath());
+    asset.setUsageCount(view.usageCount());
+    asset.setVersion(Math.toIntExact(view.version()));
+    asset.setCreatedAt(StudioResponseMapper.offsetDateTime(view.createdAt()));
+    asset.setUpdatedAt(StudioResponseMapper.offsetDateTime(view.updatedAt()));
+    return asset;
+  }
+
+  public AssetPage toApi(AssetPageView view) {
+    AssetPage page = new AssetPage();
+    page.setItems(view.items().stream().map(this::toApi).toList());
+    page.setNextCursor(view.nextCursor());
+    return page;
+  }
+
+  public AssetDetail toApi(AssetDetailView view) {
+    AssetDetail detail = new AssetDetail();
+    detail.setAsset(toApi(view.asset()));
+    detail.setUsages(
+        view.usages().stream()
+            .map(
+                usage -> {
+                  AssetUsage dto = new AssetUsage();
+                  dto.setDocumentId(usage.documentId());
+                  dto.setDocumentKind(RecordKind.fromValue(usage.documentKind().name()));
+                  dto.setTitle(usage.title());
+                  dto.setPublished(usage.published());
+                  return dto;
+                })
+            .toList());
+    detail.setHasPublicationHistory(view.hasPublicationHistory());
+    return detail;
+  }
+
+  /** 저장된 렌더 모델 JSON을 계약 union 타입으로 되살린다. */
+  private PublicRenderModel renderModel(String json) {
+    if (json == null || json.isBlank()) {
+      return null;
+    }
+    try {
+      return objectMapper.readValue(json, PublicRenderModel.class);
+    } catch (JacksonException e) {
+      throw new MappingException("a stored preview render model no longer matches the contract", e);
+    }
+  }
+}

src/adapter/inbound/web/src/main/java/dev/caskeleton/adapter/inbound/web/techlog/studio/mapper/StudioRequestMapper.java

@@ -0,0 +1,203 @@
+package dev.caskeleton.adapter.inbound.web.techlog.studio.mapper;
+
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.CaseInput;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.OrderedText;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.ProjectDecisionInput;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.QuestionInput;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.QuestionOption;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.QuestionResolution;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.ReferenceInput;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.ReferenceRule;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.RelationInput;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.WorkingCopyInput;
+import dev.caskeleton.application.techlog.error.StudioError;
+import dev.caskeleton.application.techlog.error.StudioException;
+import dev.caskeleton.application.techlog.studio.model.DecisionStatusView;
+import dev.caskeleton.application.techlog.studio.model.OrderedTextView;
+import dev.caskeleton.application.techlog.studio.model.QuestionOptionView;
+import dev.caskeleton.application.techlog.studio.model.QuestionResolutionView;
+import dev.caskeleton.application.techlog.studio.model.QuestionStatusView;
+import dev.caskeleton.application.techlog.studio.model.RecordKind;
+import dev.caskeleton.application.techlog.studio.model.ReferenceRuleView;
+import dev.caskeleton.application.techlog.studio.model.RelationView;
+import dev.caskeleton.application.techlog.studio.model.WorkingCopyBaseInput;
+import dev.caskeleton.application.techlog.studio.model.WorkingCopyInputView;
+import java.util.List;
+import java.util.UUID;
+
+/**
+ * 계약 DTO({@code WorkingCopyInput} union) → application 입력 모델.
+ *
+ * <p>계약 union 의 네 분기를 {@code switch} 로 남김없이 다룬다 — 계약에 다섯 번째 유형이 생기면 생성 DTO 가 늘어나고 여기서 {@code
+ * default} 가 없는 채로 컴파일이 깨져 알려준다.
+ */
+public final class StudioRequestMapper {
+
+  private StudioRequestMapper() {}
+
+  public static WorkingCopyInputView toApplication(WorkingCopyInput input) {
+    if (input == null) {
+      throw StudioException.of(StudioError.REQUEST_VALIDATION_FAILED, "document is required");
+    }
+    return switch (input) {
+      case CaseInput value ->
+          new WorkingCopyInputView.CaseInputView(
+              base(
+                  RecordKind.CASE,
+                  value.getTitle(),
+                  value.getSlug(),
+                  value.getSummary(),
+                  value.getTopicId(),
+                  value.getProjectId(),
+                  value.getRelations()),
+              value.getProblem(),
+              value.getConclusion(),
+              value.getEnvironment(),
+              value.getReproduction(),
+              value.getLastVerifiedOn(),
+              value.getBodyMarkdown());
+      case ReferenceInput value ->
+          new WorkingCopyInputView.ReferenceInputView(
+              base(
+                  RecordKind.REFERENCE,
+                  value.getTitle(),
+                  value.getSlug(),
+                  value.getSummary(),
+                  value.getTopicId(),
+                  value.getProjectId(),
+                  value.getRelations()),
+              value.getPurpose(),
+              rules(value.getRules()),
+              orderedText(value.getApplyWhen()),
+              orderedText(value.getExceptions()),
+              orderedText(value.getExamples()),
+              value.getVerifiedOn());
+      case QuestionInput value ->
+          new WorkingCopyInputView.QuestionInputView(
+              base(
+                  RecordKind.QUESTION,
+                  value.getTitle(),
+                  value.getSlug(),
+                  value.getSummary(),
+                  value.getTopicId(),
+                  value.getProjectId(),
+                  value.getRelations()),
+              questionStatus(value.getQuestionStatus()),
+              orderedText(value.getFacts()),
+              orderedText(value.getAssumptions()),
+              orderedText(value.getUnknowns()),
+              orderedText(value.getConstraints()),
+              options(value.getOptions()),
+              value.getNextValidation(),
+              resolution(value.getResolution()));
+      case ProjectDecisionInput value ->
+          new WorkingCopyInputView.ProjectDecisionInputView(
+              base(
+                  RecordKind.PROJECT_DECISION,
+                  value.getTitle(),
+                  value.getSlug(),
+                  value.getSummary(),
+                  value.getTopicId(),
+                  value.getProjectId(),
+                  value.getRelations()),
+              decisionStatus(value.getDecisionStatus()),
+              value.getDecidedOn(),
+              value.getStatement(),
+              value.getRationale(),
+              orderedText(value.getConsequences()));
+      default ->
+          throw StudioException.of(
+              StudioError.REQUEST_VALIDATION_FAILED,
+              "unsupported document kind: " + input.getClass().getSimpleName());
+    };
+  }
+
+  private static WorkingCopyBaseInput base(
+      RecordKind kind,
+      String title,
+      String slug,
+      String summary,
+      UUID topicId,
+      UUID projectId,
+      List<RelationInput> relations) {
+    return new WorkingCopyBaseInput(
+        kind, title, slug, summary, topicId, projectId, relations(relations));
+  }
+
+  private static List<RelationView> relations(List<RelationInput> relations) {
+    return relations == null
+        ? List.of()
+        : relations.stream()
+            .map(
+                relation ->
+                    new RelationView(
+                        relation.getId(),
+                        relation.getTargetId(),
+                        relation.getReason(),
+                        order(relation.getOrder())))
+            .toList();
+  }
+
+  private static List<OrderedTextView> orderedText(List<OrderedText> items) {
+    return items == null
+        ? List.of()
+        : items.stream()
+            .map(item -> new OrderedTextView(item.getId(), item.getText(), order(item.getOrder())))
+            .toList();
+  }
+
+  private static List<ReferenceRuleView> rules(List<ReferenceRule> items) {
+    return items == null
+        ? List.of()
+        : items.stream()
+            .map(
+                item ->
+                    new ReferenceRuleView(
+                        item.getId(), item.getTitle(), item.getBody(), order(item.getOrder())))
+            .toList();
+  }
+
+  private static List<QuestionOptionView> options(List<QuestionOption> items) {
+    return items == null
+        ? List.of()
+        : items.stream()
+            .map(
+                item ->
+                    new QuestionOptionView(
+                        item.getId(),
+                        item.getTitle(),
+                        item.getDescription(),
+                        order(item.getOrder())))
+            .toList();
+  }
+
+  private static QuestionResolutionView resolution(QuestionResolution resolution) {
+    return resolution == null
+        ? null
+        : new QuestionResolutionView(
+            resolution.getSummary(), resolution.getEvidenceTargetId(), resolution.getLinkLabel());
+  }
+
+  private static QuestionStatusView questionStatus(QuestionInput.QuestionStatusEnum status) {
+    if (status == null) {
+      return null;
+    }
+    return status == QuestionInput.QuestionStatusEnum.RESOLVED
+        ? QuestionStatusView.RESOLVED
+        : QuestionStatusView.OPEN;
+  }
+
+  private static DecisionStatusView decisionStatus(ProjectDecisionInput.DecisionStatusEnum status) {
+    if (status == null) {
+      return null;
+    }
+    return status == ProjectDecisionInput.DecisionStatusEnum.ADOPTED
+        ? DecisionStatusView.ADOPTED
+        : DecisionStatusView.PROPOSED;
+  }
+
+  /** 계약상 {@code order}는 required지만 null 을 실어 보내는 클라이언트를 500으로 떨어뜨리지 않는다. */
+  private static int order(Integer order) {
+    return order == null ? 0 : order;
+  }
+}

src/adapter/inbound/web/src/main/java/dev/caskeleton/adapter/inbound/web/techlog/studio/mapper/StudioResponseMapper.java

@@ -0,0 +1,258 @@
+package dev.caskeleton.adapter.inbound.web.techlog.studio.mapper;
+
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.CaseWorkingCopy;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.DisplayTarget;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.DocumentPage;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.DocumentSummary;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.NextAction;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.OrderedText;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.ProjectDecisionWorkingCopy;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.PublicationStatus;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.QuestionOption;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.QuestionResolution;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.QuestionWorkingCopy;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.RecordKind;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.ReferenceRule;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.ReferenceWorkingCopy;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.Relation;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.WorkingCopy;
+import dev.caskeleton.application.techlog.studio.model.DisplayTargetView;
+import dev.caskeleton.application.techlog.studio.model.DocumentPageView;
+import dev.caskeleton.application.techlog.studio.model.DocumentSummaryView;
+import dev.caskeleton.application.techlog.studio.model.OrderedTextView;
+import dev.caskeleton.application.techlog.studio.model.QuestionOptionView;
+import dev.caskeleton.application.techlog.studio.model.QuestionResolutionView;
+import dev.caskeleton.application.techlog.studio.model.QuestionStatusView;
+import dev.caskeleton.application.techlog.studio.model.ReferenceRuleView;
+import dev.caskeleton.application.techlog.studio.model.RelationView;
+import dev.caskeleton.application.techlog.studio.model.WorkingCopyBaseInput;
+import dev.caskeleton.application.techlog.studio.model.WorkingCopyView;
+import java.time.Instant;
+import java.time.OffsetDateTime;
+import java.time.ZoneOffset;
+import java.util.List;
+import java.util.function.Function;
+
+/** application 모델 → 계약 DTO. */
+public final class StudioResponseMapper {
+
+  private StudioResponseMapper() {}
+
+  public static WorkingCopy toApi(WorkingCopyView view) {
+    return switch (view) {
+      case WorkingCopyView.CaseWorkingCopyView value -> {
+        CaseWorkingCopy dto = new CaseWorkingCopy();
+        dto.setKind(CaseWorkingCopy.KindEnum.CASE);
+        applyBase(value.base(), dto::setTitle, dto::setSlug, dto::setSummary);
+        dto.setTopicId(value.base().topicId());
+        dto.setProjectId(value.base().projectId());
+        dto.setRelations(relations(value.base().relations()));
+        dto.setId(value.id());
+        dto.setVersion(version(value.version()));
+        dto.setUpdatedAt(offsetDateTime(value.updatedAt()));
+        dto.setProblem(value.problem());
+        dto.setConclusion(value.conclusion());
+        dto.setEnvironment(value.environment());
+        dto.setReproduction(value.reproduction());
+        dto.setLastVerifiedOn(value.lastVerifiedOn());
+        dto.setBodyMarkdown(value.bodyMarkdown());
+        yield dto;
+      }
+      case WorkingCopyView.ReferenceWorkingCopyView value -> {
+        ReferenceWorkingCopy dto = new ReferenceWorkingCopy();
+        dto.setKind(ReferenceWorkingCopy.KindEnum.REFERENCE);
+        applyBase(value.base(), dto::setTitle, dto::setSlug, dto::setSummary);
+        dto.setTopicId(value.base().topicId());
+        dto.setProjectId(value.base().projectId());
+        dto.setRelations(relations(value.base().relations()));
+        dto.setId(value.id());
+        dto.setVersion(version(value.version()));
+        dto.setUpdatedAt(offsetDateTime(value.updatedAt()));
+        dto.setPurpose(value.purpose());
+        dto.setRules(rulesToApi(value.rules()));
+        dto.setApplyWhen(orderedTextToApi(value.applyWhen()));
+        dto.setExceptions(orderedTextToApi(value.exceptions()));
+        dto.setExamples(orderedTextToApi(value.examples()));
+        dto.setVerifiedOn(value.verifiedOn());
+        yield dto;
+      }
+      case WorkingCopyView.QuestionWorkingCopyView value -> {
+        QuestionWorkingCopy dto = new QuestionWorkingCopy();
+        dto.setKind(QuestionWorkingCopy.KindEnum.QUESTION);
+        applyBase(value.base(), dto::setTitle, dto::setSlug, dto::setSummary);
+        dto.setTopicId(value.base().topicId());
+        dto.setProjectId(value.base().projectId());
+        dto.setRelations(relations(value.base().relations()));
+        dto.setId(value.id());
+        dto.setVersion(version(value.version()));
+        dto.setUpdatedAt(offsetDateTime(value.updatedAt()));
+        dto.setQuestionStatus(questionStatus(value.questionStatus()));
+        dto.setFacts(orderedTextToApi(value.facts()));
+        dto.setAssumptions(orderedTextToApi(value.assumptions()));
+        dto.setUnknowns(orderedTextToApi(value.unknowns()));
+        dto.setConstraints(orderedTextToApi(value.constraints()));
+        dto.setOptions(optionsToApi(value.options()));
+        dto.setNextValidation(value.nextValidation());
+        dto.setResolution(resolution(value.resolution()));
+        yield dto;
+      }
+      case WorkingCopyView.ProjectDecisionWorkingCopyView value -> {
+        ProjectDecisionWorkingCopy dto = new ProjectDecisionWorkingCopy();
+        dto.setKind(ProjectDecisionWorkingCopy.KindEnum.PROJECT_DECISION);
+        applyBase(value.base(), dto::setTitle, dto::setSlug, dto::setSummary);
+        dto.setTopicId(value.base().topicId());
+        dto.setProjectId(value.base().projectId());
+        dto.setRelations(relations(value.base().relations()));
+        dto.setId(value.id());
+        dto.setVersion(version(value.version()));
+        dto.setUpdatedAt(offsetDateTime(value.updatedAt()));
+        dto.setDecisionStatus(decisionStatus(value.decisionStatus()));
+        dto.setDecidedOn(value.decidedOn());
+        dto.setStatement(value.statement());
+        dto.setRationale(value.rationale());
+        dto.setConsequences(orderedTextToApi(value.consequences()));
+        yield dto;
+      }
+    };
+  }
+
+  public static DocumentPage toApi(DocumentPageView view) {
+    DocumentPage page = new DocumentPage();
+    page.setItems(view.items().stream().map(StudioResponseMapper::toApi).toList());
+    page.setNextCursor(view.nextCursor());
+    return page;
+  }
+
+  public static DocumentSummary toApi(DocumentSummaryView view) {
+    DocumentSummary summary = new DocumentSummary();
+    summary.setId(view.id());
+    summary.setTitle(view.title());
+    summary.setKind(RecordKind.fromValue(view.kind().name()));
+    summary.setProject(displayTarget(view.project()));
+    summary.setUpdatedAt(offsetDateTime(view.updatedAt()));
+    summary.setPublicationStatus(PublicationStatus.fromValue(view.publicationStatus().name()));
+    summary.setPublishedVersion(
+        view.publishedVersion() == null ? null : Math.toIntExact(view.publishedVersion()));
+    summary.setHasUnpublishedChanges(view.hasUnpublishedChanges());
+    summary.setNextAction(NextAction.fromValue(view.nextAction().name()));
+    return summary;
+  }
+
+  public static DisplayTarget displayTarget(DisplayTargetView view) {
+    if (view == null) {
+      return null;
+    }
+    DisplayTarget target = new DisplayTarget();
+    target.setId(view.id());
+    target.setLabel(view.label());
+    target.setPublicPath(view.publicPath());
+    return target;
+  }
+
+  public static OffsetDateTime offsetDateTime(Instant instant) {
+    return instant == null ? null : instant.atOffset(ZoneOffset.UTC);
+  }
+
+  /**
+   * 계약의 {@code version}은 {@code integer}이고 컬럼은 {@code bigint}다. 넘치는 값을 조용히 잘라내면 클라이언트가 보내는 {@code
+   * expectedVersion}이 영영 맞지 않게 되므로 예외로 드러낸다.
+   */
+  private static Integer version(long version) {
+    return Math.toIntExact(version);
+  }
+
+  private static void applyBase(
+      WorkingCopyBaseInput base,
+      java.util.function.Consumer<String> title,
+      java.util.function.Consumer<String> slug,
+      java.util.function.Consumer<String> summary) {
+    title.accept(base.title());
+    slug.accept(base.slug());
+    summary.accept(base.summary());
+  }
+
+  private static List<Relation> relations(List<RelationView> views) {
+    return map(
+        views,
+        view -> {
+          Relation relation = new Relation();
+          relation.setId(view.id());
+          relation.setTargetId(view.targetId());
+          relation.setReason(view.reason());
+          relation.setOrder(view.order());
+          return relation;
+        });
+  }
+
+  public static List<OrderedText> orderedTextToApi(List<OrderedTextView> views) {
+    return map(
+        views,
+        view -> {
+          OrderedText text = new OrderedText();
+          text.setId(view.id());
+          text.setText(view.text());
+          text.setOrder(view.order());
+          return text;
+        });
+  }
+
+  public static List<ReferenceRule> rulesToApi(List<ReferenceRuleView> views) {
+    return map(
+        views,
+        view -> {
+          ReferenceRule rule = new ReferenceRule();
+          rule.setId(view.id());
+          rule.setTitle(view.title());
+          rule.setBody(view.body());
+          rule.setOrder(view.order());
+          return rule;
+        });
+  }
+
+  public static List<QuestionOption> optionsToApi(List<QuestionOptionView> views) {
+    return map(
+        views,
+        view -> {
+          QuestionOption option = new QuestionOption();
+          option.setId(view.id());
+          option.setTitle(view.title());
+          option.setDescription(view.description());
+          option.setOrder(view.order());
+          return option;
+        });
+  }
+
+  private static QuestionResolution resolution(QuestionResolutionView view) {
+    if (view == null) {
+      return null;
+    }
+    QuestionResolution resolution = new QuestionResolution();
+    resolution.setSummary(view.summary());
+    resolution.setEvidenceTargetId(view.evidenceTargetId());
+    resolution.setLinkLabel(view.linkLabel());
+    return resolution;
+  }
+
+  private static QuestionWorkingCopy.QuestionStatusEnum questionStatus(QuestionStatusView status) {
+    if (status == null) {
+      return null;
+    }
+    return status == QuestionStatusView.RESOLVED
+        ? QuestionWorkingCopy.QuestionStatusEnum.RESOLVED
+        : QuestionWorkingCopy.QuestionStatusEnum.OPEN;
+  }
+
+  private static ProjectDecisionWorkingCopy.DecisionStatusEnum decisionStatus(
+      dev.caskeleton.application.techlog.studio.model.DecisionStatusView status) {
+    if (status == null) {
+      return null;
+    }
+    return status == dev.caskeleton.application.techlog.studio.model.DecisionStatusView.ADOPTED
+        ? ProjectDecisionWorkingCopy.DecisionStatusEnum.ADOPTED
+        : ProjectDecisionWorkingCopy.DecisionStatusEnum.PROPOSED;
+  }
+
+  private static <S, T> List<T> map(List<S> source, Function<S, T> mapper) {
+    return source == null ? List.of() : source.stream().map(mapper).toList();
+  }
+}

src/adapter/inbound/web/src/main/java/dev/caskeleton/adapter/inbound/web/techlog/studio/render/BlockRenderer.java

@@ -0,0 +1,236 @@
+package dev.caskeleton.adapter.inbound.web.techlog.studio.render;
+
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.BlockquoteBlock;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.CaseRenderBlock;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.CodeBlock;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.DataTableBlock;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.DataTableCell;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.DataTableColumn;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.DataTableRow;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.HeadingBlock;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.Inline;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.ListItem;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.OrderedListBlock;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.ParagraphBlock;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.UnorderedListBlock;
+import java.util.ArrayList;
+import java.util.List;
+import org.commonmark.ext.gfm.tables.TableBlock;
+import org.commonmark.ext.gfm.tables.TableBody;
+import org.commonmark.ext.gfm.tables.TableCell;
+import org.commonmark.ext.gfm.tables.TableHead;
+import org.commonmark.ext.gfm.tables.TableRow;
+import org.commonmark.node.BlockQuote;
+import org.commonmark.node.BulletList;
+import org.commonmark.node.FencedCodeBlock;
+import org.commonmark.node.Heading;
+import org.commonmark.node.IndentedCodeBlock;
+import org.commonmark.node.Node;
+import org.commonmark.node.OrderedList;
+import org.commonmark.node.Paragraph;
+import org.commonmark.node.ThematicBreak;
+
+/**
+ * commonmark 블록 노드를 계약의 {@code CaseRenderBlock} union 으로 옮긴다.
+ *
+ * <p>계약이 표현할 수 없는 것은 조용히 다른 것으로 바꾸지 않고 경고로 남긴다(설계 05장 §12) — 렌더러가 지원하지 않는 문법을 그럴듯하게 잘못 해석하면 작성자는 게시
+ * 결과를 신뢰할 수 없다.
+ */
+final class BlockRenderer {
+
+  /** 계약 {@code HeadingBlock.level} 은 2..4 다. Markdown 의 h1/h5/h6 는 이 범위로 접는다. */
+  private static final int MIN_HEADING_LEVEL = 2;
+
+  private static final int MAX_HEADING_LEVEL = 4;
+
+  private final HeadingIds headingIds;
+  private final List<String> warnings;
+  private int tableSequence;
+  private int listItemSequence;
+
+  BlockRenderer(HeadingIds headingIds, List<String> warnings) {
+    this.headingIds = headingIds;
+    this.warnings = warnings;
+  }
+
+  List<CaseRenderBlock> render(Node document) {
+    List<CaseRenderBlock> blocks = new ArrayList<>();
+    for (Node node = document.getFirstChild(); node != null; node = node.getNext()) {
+      CaseRenderBlock block = renderBlock(node);
+      if (block != null) {
+        blocks.add(block);
+      }
+    }
+    return blocks;
+  }
+
+  private CaseRenderBlock renderBlock(Node node) {
+    return switch (node) {
+      case Heading value -> heading(value);
+      case Paragraph value -> paragraph(InlineRenderer.render(value));
+      case BlockQuote value -> blockquote(value);
+      case BulletList value -> bulletList(value);
+      case OrderedList value -> orderedList(value);
+      case FencedCodeBlock value -> code(value.getLiteral(), value.getInfo());
+      case IndentedCodeBlock value -> code(value.getLiteral(), null);
+      case TableBlock value -> table(value);
+      case ThematicBreak ignored -> {
+        // 계약의 CaseRenderBlock 에 수평선 타입이 없다. 다른 블록으로 바꿔 넣으면 원문에 없던
+        // 구조가 생기므로 버리고 경고한다.
+        warnings.add("THEMATIC_BREAK_NOT_RENDERABLE");
+        yield null;
+      }
+      default -> {
+        List<Inline> content = InlineRenderer.render(node);
+        yield content.isEmpty() ? null : paragraph(content);
+      }
+    };
+  }
+
+  private CaseRenderBlock heading(Heading value) {
+    HeadingBlock block = new HeadingBlock();
+    block.setType(HeadingBlock.TypeEnum.HEADING);
+    block.setId(headingIds.nextFor(InlineRenderer.plainText(value)));
+    block.setLevel(Math.clamp(value.getLevel(), MIN_HEADING_LEVEL, MAX_HEADING_LEVEL));
+    block.setContent(InlineRenderer.render(value));
+    return block;
+  }
+
+  private static CaseRenderBlock paragraph(List<Inline> content) {
+    ParagraphBlock block = new ParagraphBlock();
+    block.setType(ParagraphBlock.TypeEnum.PARAGRAPH);
+    block.setContent(content);
+    return block;
+  }
+
+  /** 계약의 {@code BlockquoteBlock.content} 는 블록이 아니라 inline 배열이라 안쪽 문단을 이어 붙인다. */
+  private CaseRenderBlock blockquote(BlockQuote value) {
+    BlockquoteBlock block = new BlockquoteBlock();
+    block.setType(BlockquoteBlock.TypeEnum.BLOCKQUOTE);
+    List<Inline> content = new ArrayList<>();
+    for (Node child = value.getFirstChild(); child != null; child = child.getNext()) {
+      List<Inline> rendered = InlineRenderer.render(child);
+      if (rendered.isEmpty()) {
+        continue;
+      }
+      if (!content.isEmpty()) {
+        // 인용 안의 문단 경계. 이어 붙이기만 하면 앞 문단의 마지막 낱말과 다음 문단의 첫 낱말이
+        // 한 낱말로 붙어 읽힌다.
+        content.add(InlineRenderer.spacer());
+      }
+      content.addAll(rendered);
+    }
+    block.setContent(content);
+    return block;
+  }
+
+  private CaseRenderBlock bulletList(BulletList value) {
+    UnorderedListBlock block = new UnorderedListBlock();
+    block.setType(UnorderedListBlock.TypeEnum.UNORDERED_LIST);
+    block.setItems(listItems(value));
+    return block;
+  }
+
+  private CaseRenderBlock orderedList(OrderedList value) {
+    OrderedListBlock block = new OrderedListBlock();
+    block.setType(OrderedListBlock.TypeEnum.ORDERED_LIST);
+    block.setItems(listItems(value));
+    return block;
+  }
+
+  private List<ListItem> listItems(Node list) {
+    List<ListItem> items = new ArrayList<>();
+    for (Node child = list.getFirstChild(); child != null; child = child.getNext()) {
+      ListItem item = new ListItem();
+      listItemSequence++;
+      item.setId("li-" + listItemSequence);
+      List<Inline> content = new ArrayList<>();
+      for (Node paragraph = child.getFirstChild();
+          paragraph != null;
+          paragraph = paragraph.getNext()) {
+        content.addAll(InlineRenderer.render(paragraph));
+      }
+      item.setContent(content);
+      items.add(item);
+    }
+    return items;
+  }
+
+  private static CaseRenderBlock code(String literal, String info) {
+    CodeBlock block = new CodeBlock();
+    block.setType(CodeBlock.TypeEnum.CODE_BLOCK);
+    block.setCode(literal == null ? "" : literal);
+    block.setLanguage(info == null || info.isBlank() ? null : info.strip());
+    block.setLabel(null);
+    return block;
+  }
+
+  private CaseRenderBlock table(TableBlock value) {
+    DataTableBlock block = new DataTableBlock();
+    block.setType(DataTableBlock.TypeEnum.DATA_TABLE);
+    tableSequence++;
+    block.setId("table-" + tableSequence);
+    block.setCaption("");
+    // 계약은 rowHeaderColumn 을 1-based 로 정의한다. GFM 표에는 행 머리글 개념이 없으므로 비운다.
+    block.setRowHeaderColumn(null);
+
+    List<DataTableColumn> columns = new ArrayList<>();
+    List<DataTableRow> rows = new ArrayList<>();
+    int rowSequence = 0;
+
+    for (Node section = value.getFirstChild(); section != null; section = section.getNext()) {
+      for (Node row = section.getFirstChild(); row != null; row = row.getNext()) {
+        if (!(row instanceof TableRow tableRow)) {
+          continue;
+        }
+        if (section instanceof TableHead) {
+          int index = 0;
+          for (Node cell = tableRow.getFirstChild(); cell != null; cell = cell.getNext()) {
+            DataTableColumn column = new DataTableColumn();
+            index++;
+            column.setId("col-" + index);
+            String label = InlineRenderer.plainText(cell);
+            // 계약의 label 은 minLength 1 이다. 빈 머리글 칸은 열 번호로 대신한다.
+            column.setLabel(label.isBlank() ? "col-" + index : label);
+            column.setAlignment(alignment(cell));
+            columns.add(column);
+          }
+        } else if (section instanceof TableBody) {
+          DataTableRow dataRow = new DataTableRow();
+          rowSequence++;
+          dataRow.setId("row-" + rowSequence);
+          List<DataTableCell> cells = new ArrayList<>();
+          int index = 0;
+          for (Node cell = tableRow.getFirstChild(); cell != null; cell = cell.getNext()) {
+            DataTableCell dataCell = new DataTableCell();
+            index++;
+            dataCell.setColumnId("col-" + index);
+            dataCell.setContent(InlineRenderer.render(cell));
+            cells.add(dataCell);
+          }
+          dataRow.setCells(cells);
+          rows.add(dataRow);
+        }
+      }
+    }
+    if (columns.isEmpty()) {
+      // 계약의 columns 는 minItems 1 이다. 머리글 없는 표는 계약상 표현할 수 없다.
+      warnings.add("DATA_TABLE_WITHOUT_HEADER_NOT_RENDERABLE");
+      return null;
+    }
+    block.setColumns(columns);
+    block.setRows(rows);
+    return block;
+  }
+
+  private static DataTableColumn.AlignmentEnum alignment(Node cell) {
+    if (!(cell instanceof TableCell tableCell) || tableCell.getAlignment() == null) {
+      return DataTableColumn.AlignmentEnum.LEFT;
+    }
+    return switch (tableCell.getAlignment()) {
+      case CENTER -> DataTableColumn.AlignmentEnum.CENTER;
+      case RIGHT -> DataTableColumn.AlignmentEnum.RIGHT;
+      case LEFT -> DataTableColumn.AlignmentEnum.LEFT;
+    };
+  }
+}

src/adapter/inbound/web/src/main/java/dev/caskeleton/adapter/inbound/web/techlog/studio/render/HeadingIds.java

@@ -0,0 +1,71 @@
+package dev.caskeleton.adapter.inbound.web.techlog.studio.render;
+
+import java.text.Normalizer;
+import java.util.HashMap;
+import java.util.Locale;
+import java.util.Map;
+
+/**
+ * 설계 05장 §6의 heading ID 알고리즘. TOC와 anchor가 Public과 Studio에서 같아야 하므로 구현은 한 곳에만 둔다.
+ *
+ * <pre>{@code
+ * "Authorization Code Flow" -> authorization-code-flow
+ * "JPA N+1 문제"             -> jpa-n-1-문제
+ * "결론"                     -> 결론
+ * "결론" (두 번째)           -> 결론-2
+ * }</pre>
+ */
+final class HeadingIds {
+
+  private static final String FALLBACK = "section";
+
+  private final Map<String, Integer> used = new HashMap<>();
+
+  /** 같은 문서 안에서 중복되면 {@code -2}, {@code -3} 순으로 suffix 를 붙인다. */
+  String nextFor(String headingPlainText) {
+    String base = slugify(headingPlainText);
+    int seen = used.merge(base, 1, Integer::sum);
+    return seen == 1 ? base : base + "-" + seen;
+  }
+
+  private static String slugify(String text) {
+    String normalized =
+        Normalizer.normalize(text == null ? "" : text, Normalizer.Form.NFKC)
+            .trim()
+            .toLowerCase(Locale.ROOT);
+
+    StringBuilder out = new StringBuilder(normalized.length());
+    boolean pendingSeparator = false;
+    for (int i = 0; i < normalized.length(); i++) {
+      char ch = normalized.charAt(i);
+      if (isKept(ch)) {
+        // 구분자는 실제로 유지 문자가 뒤따를 때만 쓴다 — 그래야 끝에 하이픈이 남지 않는다.
+        if (pendingSeparator && !out.isEmpty()) {
+          out.append('-');
+        }
+        pendingSeparator = false;
+        out.append(ch);
+      } else {
+        pendingSeparator = true;
+      }
+    }
+    return out.isEmpty() ? FALLBACK : out.toString();
+  }
+
+  /** 한글·영문·숫자·하이픈만 남긴다(설계 05장 §6 6단계). */
+  private static boolean isKept(char ch) {
+    if (ch == '-') {
+      return true;
+    }
+    if ((ch >= 'a' && ch <= 'z') || (ch >= '0' && ch <= '9')) {
+      return true;
+    }
+    return isHangul(ch);
+  }
+
+  private static boolean isHangul(char ch) {
+    return (ch >= 0xAC00 && ch <= 0xD7A3) // 완성형 음절
+        || (ch >= 0x1100 && ch <= 0x11FF) // 초·중·종성 자모
+        || (ch >= 0x3130 && ch <= 0x318F); // 호환용 자모
+  }
+}

src/adapter/inbound/web/src/main/java/dev/caskeleton/adapter/inbound/web/techlog/studio/render/InlineRenderer.java

@@ -0,0 +1,117 @@
+package dev.caskeleton.adapter.inbound.web.techlog.studio.render;
+
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.Inline;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.InlineCode;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.InlineEmphasis;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.InlineLink;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.InlineStrong;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.InlineText;
+import java.util.ArrayList;
+import java.util.List;
+import org.commonmark.node.Code;
+import org.commonmark.node.Emphasis;
+import org.commonmark.node.HardLineBreak;
+import org.commonmark.node.Image;
+import org.commonmark.node.Link;
+import org.commonmark.node.Node;
+import org.commonmark.node.SoftLineBreak;
+import org.commonmark.node.StrongEmphasis;
+import org.commonmark.node.Text;
+
+/** commonmark inline 노드를 계약의 {@code Inline} union 으로 옮긴다. */
+final class InlineRenderer {
+
+  private InlineRenderer() {}
+
+  static List<Inline> render(Node parent) {
+    List<Inline> out = new ArrayList<>();
+    for (Node child = parent.getFirstChild(); child != null; child = child.getNext()) {
+      Inline rendered = renderNode(child);
+      if (rendered != null) {
+        out.add(rendered);
+      }
+    }
+    return out;
+  }
+
+  /** heading id 계산과 alt 추출에 쓰는 평문. */
+  static String plainText(Node parent) {
+    StringBuilder text = new StringBuilder();
+    appendPlainText(parent, text);
+    return text.toString();
+  }
+
+  private static void appendPlainText(Node parent, StringBuilder text) {
+    for (Node child = parent.getFirstChild(); child != null; child = child.getNext()) {
+      switch (child) {
+        case Text value -> text.append(value.getLiteral());
+        case Code value -> text.append(value.getLiteral());
+        case SoftLineBreak ignored -> text.append(' ');
+        case HardLineBreak ignored -> text.append(' ');
+        default -> appendPlainText(child, text);
+      }
+    }
+  }
+
+  private static Inline renderNode(Node node) {
+    return switch (node) {
+      case Text value -> text(value.getLiteral());
+      case Code value -> {
+        // 계약의 InlineCode.code 는 minLength 1 이다. 빈 백틱은 보낼 값이 없으므로 버린다.
+        if (value.getLiteral().isEmpty()) {
+          yield null;
+        }
+        InlineCode code = new InlineCode();
+        code.setType(InlineCode.TypeEnum.INLINE_CODE);
+        code.setCode(value.getLiteral());
+        yield code;
+      }
+      case Emphasis value -> {
+        InlineEmphasis emphasis = new InlineEmphasis();
+        emphasis.setType(InlineEmphasis.TypeEnum.EMPHASIS);
+        emphasis.setChildren(render(value));
+        yield emphasis;
+      }
+      case StrongEmphasis value -> {
+        InlineStrong strong = new InlineStrong();
+        strong.setType(InlineStrong.TypeEnum.STRONG);
+        strong.setChildren(render(value));
+        yield strong;
+      }
+      case Link value -> {
+        InlineLink link = new InlineLink();
+        link.setType(InlineLink.TypeEnum.LINK);
+        String label = plainText(value);
+        // 계약의 label 은 minLength 1 이다. 라벨 없는 링크는 주소 자체를 라벨로 쓴다 —
+        // 버리면 사용자가 쓴 링크가 통째로 사라진다.
+        link.setLabel(label.isBlank() ? value.getDestination() : label);
+        link.setHref(java.net.URI.create(value.getDestination()));
+        yield link;
+      }
+      // 이미지는 EvidenceFigure 로만 다룬다(설계 05장 §3). 인라인 이미지는 계약의 Inline union 에
+      // 대응 타입이 없으므로 alt 를 글자로 남긴다 — 조용히 사라지게 두지 않는다.
+      case Image value -> text(plainText(value));
+      case SoftLineBreak ignored -> text(" ");
+      case HardLineBreak ignored -> text(" ");
+      default -> {
+        String plain = plainText(node);
+        yield plain.isEmpty() ? null : text(plain);
+      }
+    };
+  }
+
+  /** 블록 경계를 한 칸 띄우는 조각. 계약의 Inline union 에 줄바꿈 타입이 없어 공백으로 표현한다. */
+  static Inline spacer() {
+    return text(" ");
+  }
+
+  private static Inline text(String literal) {
+    if (literal == null || literal.isEmpty()) {
+      return null;
+    }
+    InlineText inlineText = new InlineText();
+    inlineText.setType(InlineText.TypeEnum.TEXT);
+    inlineText.setText(literal);
+    return inlineText;
+  }
+}

src/adapter/inbound/web/src/main/java/dev/caskeleton/adapter/inbound/web/techlog/studio/render/MarkdownSegments.java

@@ -0,0 +1,92 @@
+package dev.caskeleton.adapter.inbound.web.techlog.studio.render;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * 본문을 "평범한 Markdown" 조각과 "directive" 조각으로 순서대로 자른다.
+ *
+ * <p>fenced code block 안의 {@code :::} 는 directive 가 아니다 — 코드 예시로 directive 문법 자체를 적는 문서가 그 자리에서 잘리면
+ * 안 된다. 그래서 코드 펜스 안에 있는 동안은 directive 를 찾지 않는다.
+ */
+final class MarkdownSegments {
+
+  private MarkdownSegments() {}
+
+  /** 조각 하나. {@code directive} 가 null 이면 평범한 Markdown 이다. */
+  record Segment(String markdown, StudioDirective directive, String directiveBody) {}
+
+  static List<Segment> split(String source) {
+    List<Segment> segments = new ArrayList<>();
+    if (source == null || source.isBlank()) {
+      return segments;
+    }
+    String[] lines = source.split("\n", -1);
+    StringBuilder markdown = new StringBuilder();
+    String codeFence = null;
+
+    for (int i = 0; i < lines.length; i++) {
+      String line = lines[i];
+      String trimmed = line.strip();
+
+      if (codeFence != null) {
+        markdown.append(line).append('\n');
+        if (trimmed.startsWith(codeFence)) {
+          codeFence = null;
+        }
+        continue;
+      }
+      if (trimmed.startsWith("```") || trimmed.startsWith("~~~")) {
+        codeFence = trimmed.startsWith("```") ? "```" : "~~~";
+        markdown.append(line).append('\n');
+        continue;
+      }
+
+      StudioDirective directive = StudioDirective.parse(line);
+      if (directive == null || directive.name().isEmpty()) {
+        markdown.append(line).append('\n');
+        continue;
+      }
+
+      flush(segments, markdown);
+
+      // 컨테이너형(:::name ... 내용 ... :::)인지 leaf형(:::evidence ...)인지는 <b>닫는 줄이
+      // 실제로 있는지</b>로 정한다. 이름으로 정하면 새 directive 를 더할 때마다 목록을 고쳐야 하고,
+      // "닫는 줄이 없으면 문서 끝까지 본문"으로 정하면 닫기를 빠뜨린 directive 하나가 뒤 내용을
+      // 통째로 삼킨다. 닫는 줄은 다음 directive 가 열리기 전까지만 찾는다.
+      int closing = -1;
+      for (int j = i + 1; j < lines.length; j++) {
+        String candidate = lines[j].strip();
+        if (":::".equals(candidate)) {
+          closing = j;
+          break;
+        }
+        if (StudioDirective.parse(lines[j]) != null) {
+          break;
+        }
+      }
+      if (closing < 0) {
+        segments.add(new Segment(null, directive, ""));
+      } else {
+        StringBuilder body = new StringBuilder();
+        for (int j = i + 1; j < closing; j++) {
+          body.append(lines[j]).append('\n');
+        }
+        segments.add(new Segment(null, directive, body.toString()));
+        i = closing;
+      }
+    }
+    flush(segments, markdown);
+    return segments;
+  }
+
+  private static void flush(List<Segment> segments, StringBuilder markdown) {
+    if (!markdown.isEmpty()) {
+      String text = markdown.toString();
+      if (!text.isBlank()) {
+        segments.add(new Segment(text, null, null));
+      }
+      markdown.setLength(0);
+    }
+  }
+}

src/adapter/inbound/web/src/main/java/dev/caskeleton/adapter/inbound/web/techlog/studio/render/PublicRenderModelFactory.java

@@ -0,0 +1,166 @@
+package dev.caskeleton.adapter.inbound.web.techlog.studio.render;
+
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.CasePublicRenderModel;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.DisplayTarget;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.ProjectDecisionPublicRenderModel;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.PublicRenderModel;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.QuestionPublicRenderModel;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.ReferencePublicRenderModel;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.RenderContext;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.ResolvedQuestionResolution;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.ResolvedRelation;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.mapper.StudioResponseMapper;
+import dev.caskeleton.application.techlog.studio.model.DecisionStatusView;
+import dev.caskeleton.application.techlog.studio.model.QuestionStatusView;
+import dev.caskeleton.application.techlog.studio.model.RenderInput;
+import dev.caskeleton.application.techlog.studio.model.ResolvedRelationView;
+import dev.caskeleton.application.techlog.studio.model.WorkingCopyView;
+import java.util.List;
+import org.springframework.stereotype.Component;
+
+/**
+ * 편집본 + 해석된 의존 상태 → 계약 {@code PublicRenderModel}.
+ *
+ * <p>본문 Markdown 을 블록으로 바꾸는 것은 {@code CASE} 뿐이다 — 나머지 세 유형의 공개 모델은 구조화된 필드로만 이루어져 있다(계약 {@code
+ * *PublicRenderModel}).
+ */
+@Component
+public class PublicRenderModelFactory {
+
+  private final StudioContentRenderer contentRenderer;
+
+  public PublicRenderModelFactory(StudioContentRenderer contentRenderer) {
+    this.contentRenderer = contentRenderer;
+  }
+
+  /**
+   * 렌더 결과와 그 과정에서 생긴 경고.
+   *
+   * @param warnings 계약으로 표현할 수 없어 버리거나 낮춰 처리한 것들(설계 05장 §12)
+   */
+  public record Rendered(PublicRenderModel model, List<String> warnings) {}
+
+  public Rendered create(RenderInput input) {
+    RenderContext context = new RenderContext();
+    context.setGeneratedAt(StudioResponseMapper.offsetDateTime(input.generatedAt()));
+    context.setDependencyRevision(input.dependencyRevision());
+
+    List<ResolvedRelation> relations =
+        input.relations().stream().map(PublicRenderModelFactory::relation).toList();
+    DisplayTarget topic = StudioResponseMapper.displayTarget(input.topic());
+    DisplayTarget project = StudioResponseMapper.displayTarget(input.project());
+
+    return switch (input.document()) {
+      case WorkingCopyView.CaseWorkingCopyView value -> {
+        StudioContentRenderer.RenderedContent body =
+            contentRenderer.render(value.bodyMarkdown(), input.assetsByKey());
+        CasePublicRenderModel model = new CasePublicRenderModel();
+        model.setKind(CasePublicRenderModel.KindEnum.CASE);
+        model.setSlug(value.base().slug());
+        model.setTitle(value.base().title());
+        model.setSummary(value.base().summary());
+        model.setPublicPath(input.publicPath());
+        model.setTopic(topic);
+        model.setProject(project);
+        model.setRelations(relations);
+        model.setRenderContext(context);
+        model.setProblem(value.problem());
+        model.setConclusion(value.conclusion());
+        model.setEnvironment(value.environment());
+        model.setReproduction(value.reproduction());
+        model.setLastVerifiedOn(value.lastVerifiedOn());
+        model.setBodyBlocks(body.blocks());
+        yield new Rendered(model, body.warnings());
+      }
+      case WorkingCopyView.ReferenceWorkingCopyView value -> {
+        ReferencePublicRenderModel model = new ReferencePublicRenderModel();
+        model.setKind(ReferencePublicRenderModel.KindEnum.REFERENCE);
+        model.setSlug(value.base().slug());
+        model.setTitle(value.base().title());
+        model.setSummary(value.base().summary());
+        model.setPublicPath(input.publicPath());
+        model.setTopic(topic);
+        model.setProject(project);
+        model.setRelations(relations);
+        model.setRenderContext(context);
+        model.setPurpose(value.purpose());
+        model.setRules(StudioResponseMapper.rulesToApi(value.rules()));
+        model.setApplyWhen(StudioResponseMapper.orderedTextToApi(value.applyWhen()));
+        model.setExceptions(StudioResponseMapper.orderedTextToApi(value.exceptions()));
+        model.setExamples(StudioResponseMapper.orderedTextToApi(value.examples()));
+        model.setVerifiedOn(value.verifiedOn());
+        yield new Rendered(model, List.of());
+      }
+      case WorkingCopyView.QuestionWorkingCopyView value -> {
+        QuestionPublicRenderModel model = new QuestionPublicRenderModel();
+        model.setKind(QuestionPublicRenderModel.KindEnum.QUESTION);
+        model.setSlug(value.base().slug());
+        model.setTitle(value.base().title());
+        model.setSummary(value.base().summary());
+        model.setPublicPath(input.publicPath());
+        model.setTopic(topic);
+        model.setProject(project);
+        model.setRelations(relations);
+        model.setRenderContext(context);
+        model.setStatus(
+            value.questionStatus() == QuestionStatusView.RESOLVED
+                ? QuestionPublicRenderModel.StatusEnum.RESOLVED
+                : QuestionPublicRenderModel.StatusEnum.OPEN);
+        model.setFacts(StudioResponseMapper.orderedTextToApi(value.facts()));
+        model.setAssumptions(StudioResponseMapper.orderedTextToApi(value.assumptions()));
+        model.setUnknowns(StudioResponseMapper.orderedTextToApi(value.unknowns()));
+        model.setConstraints(StudioResponseMapper.orderedTextToApi(value.constraints()));
+        model.setOptions(StudioResponseMapper.optionsToApi(value.options()));
+        model.setNextValidation(value.nextValidation());
+        model.setResolution(resolution(value, input));
+        yield new Rendered(model, List.of());
+      }
+      case WorkingCopyView.ProjectDecisionWorkingCopyView value -> {
+        ProjectDecisionPublicRenderModel model = new ProjectDecisionPublicRenderModel();
+        model.setKind(ProjectDecisionPublicRenderModel.KindEnum.PROJECT_DECISION);
+        model.setSlug(value.base().slug());
+        model.setTitle(value.base().title());
+        model.setSummary(value.base().summary());
+        model.setPublicPath(input.publicPath());
+        model.setTopic(topic);
+        model.setProject(project);
+        model.setRelations(relations);
+        model.setRenderContext(context);
+        model.setStatus(
+            value.decisionStatus() == DecisionStatusView.ADOPTED
+                ? ProjectDecisionPublicRenderModel.StatusEnum.ADOPTED
+                : ProjectDecisionPublicRenderModel.StatusEnum.PROPOSED);
+        model.setDecidedOn(value.decidedOn());
+        model.setStatement(value.statement());
+        model.setRationale(value.rationale());
+        model.setConsequences(StudioResponseMapper.orderedTextToApi(value.consequences()));
+        yield new Rendered(model, List.of());
+      }
+    };
+  }
+
+  private static ResolvedRelation relation(ResolvedRelationView view) {
+    ResolvedRelation relation = new ResolvedRelation();
+    relation.setId(view.id());
+    relation.setTargetId(view.targetId());
+    relation.setTargetKind(ResolvedRelation.TargetKindEnum.fromValue(view.targetKind()));
+    relation.setTitle(view.title());
+    relation.setPublicPath(view.publicPath());
+    relation.setReason(view.reason());
+    relation.setOrder(view.order());
+    return relation;
+  }
+
+  private static ResolvedQuestionResolution resolution(
+      WorkingCopyView.QuestionWorkingCopyView value, RenderInput input) {
+    if (value.resolution() == null) {
+      return null;
+    }
+    ResolvedQuestionResolution resolution = new ResolvedQuestionResolution();
+    resolution.setSummary(value.resolution().summary());
+    resolution.setEvidenceTarget(
+        StudioResponseMapper.displayTarget(input.resolutionEvidenceTarget()));
+    resolution.setLinkLabel(value.resolution().linkLabel());
+    return resolution;
+  }
+}

src/adapter/inbound/web/src/main/java/dev/caskeleton/adapter/inbound/web/techlog/studio/render/RenderModelJsonAdapter.java

@@ -0,0 +1,47 @@
+package dev.caskeleton.adapter.inbound.web.techlog.studio.render;
+
+import dev.caskeleton.application.techlog.studio.model.RenderInput;
+import dev.caskeleton.application.techlog.studio.port.out.RenderModelPort;
+import dev.caskeleton.shared.error.MappingException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.stereotype.Component;
+import tools.jackson.core.JacksonException;
+import tools.jackson.databind.ObjectMapper;
+
+/**
+ * 렌더 결과를 {@code studio_preview.render_model} 에 그대로 들어갈 JSON 으로 만든다.
+ *
+ * <p>렌더 경고는 여기서 버리지 않고 로그로 남긴다 — 계약의 {@code PublicPreview} 에 경고를 실을 자리가 없지만, 경고가 생겼다는 사실 자체가 "작성자가
+ * 쓴 문법 일부가 계약으로 표현되지 못했다"는 신호라 흔적 없이 사라지면 안 된다. 게시를 막아야 하는 종류(미해결 Asset 등)는 검증이 별도로 잡는다.
+ */
+@Component
+public class RenderModelJsonAdapter implements RenderModelPort {
+
+  private static final Logger log = LoggerFactory.getLogger(RenderModelJsonAdapter.class);
+
+  private final PublicRenderModelFactory factory;
+  private final ObjectMapper objectMapper;
+
+  public RenderModelJsonAdapter(PublicRenderModelFactory factory, ObjectMapper objectMapper) {
+    this.factory = factory;
+    this.objectMapper = objectMapper;
+  }
+
+  @Override
+  public String renderToJson(RenderInput input) {
+    PublicRenderModelFactory.Rendered rendered = factory.create(input);
+    if (!rendered.warnings().isEmpty()) {
+      log.warn(
+          "studio render produced {} warning(s) for document {}: {}",
+          rendered.warnings().size(),
+          input.document().id(),
+          rendered.warnings());
+    }
+    try {
+      return objectMapper.writeValueAsString(rendered.model());
+    } catch (JacksonException e) {
+      throw new MappingException("failed to serialise a Studio render model", e);
+    }
+  }
+}

src/adapter/inbound/web/src/main/java/dev/caskeleton/adapter/inbound/web/techlog/studio/render/StudioContentRenderer.java

@@ -0,0 +1,181 @@
+package dev.caskeleton.adapter.inbound.web.techlog.studio.render;
+
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.CalloutBlock;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.CaseRenderBlock;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.EvidenceFigureBlock;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.ResolvedAsset;
+import dev.caskeleton.application.techlog.studio.model.ResolvedAssetView;
+import dev.caskeleton.application.techlog.studio.port.out.ContentAnalyzerPort;
+import java.util.ArrayList;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import org.commonmark.ext.autolink.AutolinkExtension;
+import org.commonmark.ext.gfm.strikethrough.StrikethroughExtension;
+import org.commonmark.ext.gfm.tables.TablesExtension;
+import org.commonmark.parser.Parser;
+import org.springframework.stereotype.Component;
+
+/**
+ * 본문 Markdown → 계약의 {@code CaseRenderBlock} 목록. Preview·공개·Snapshot 세 화면이 이 한 구현을 공유한다(ADR-005) —
+ * 화면마다 다른 경로를 두면 작성자가 확인한 것과 공개된 것이 달라진다.
+ *
+ * <p>Asset 해석은 렌더러가 직접 조회하지 않고 {@code assetsByKey} 로 주입받는다. Snapshot 만 게시 시점에 고정된 manifest 를 넣고
+ * 나머지는 현재 상태를 넣으며, 그것이 ADR-002 가 요구하는 유일하게 허용된 차이다.
+ */
+@Component
+public class StudioContentRenderer implements ContentAnalyzerPort {
+
+  /** 설계 05장 §4가 허용한 callout 종류. 그 밖의 이름은 경고를 만들고 일반 인용으로 처리한다. */
+  private static final Set<String> INFO_CALLOUTS = Set.of("note", "tip");
+
+  private static final Set<String> WARNING_CALLOUTS = Set.of("warning", "danger");
+
+  private static final String EVIDENCE = "evidence";
+
+  private final Parser parser =
+      Parser.builder()
+          .extensions(
+              List.of(
+                  TablesExtension.create(),
+                  StrikethroughExtension.create(),
+                  AutolinkExtension.create()))
+          .build();
+
+  /**
+   * 렌더 결과.
+   *
+   * @param blocks 계약 모양의 본문 블록
+   * @param warnings 계약으로 표현할 수 없어 버리거나 낮춰 처리한 것들의 코드
+   */
+  public record RenderedContent(List<CaseRenderBlock> blocks, List<String> warnings) {}
+
+  public RenderedContent render(String bodyMarkdown, Map<String, ResolvedAssetView> assetsByKey) {
+    List<CaseRenderBlock> blocks = new ArrayList<>();
+    List<String> warnings = new ArrayList<>();
+    HeadingIds headingIds = new HeadingIds();
+
+    for (MarkdownSegments.Segment segment : MarkdownSegments.split(bodyMarkdown)) {
+      if (segment.directive() == null) {
+        blocks.addAll(
+            new BlockRenderer(headingIds, warnings).render(parser.parse(segment.markdown())));
+        continue;
+      }
+      CaseRenderBlock block = renderDirective(segment, assetsByKey, headingIds, warnings);
+      if (block != null) {
+        blocks.add(block);
+      }
+    }
+    return new RenderedContent(blocks, warnings);
+  }
+
+  @Override
+  public ContentAnalysis analyze(String bodyMarkdown) {
+    List<AssetUsage> usages = new ArrayList<>();
+    Set<String> unsupported = new LinkedHashSet<>();
+
+    for (MarkdownSegments.Segment segment : MarkdownSegments.split(bodyMarkdown)) {
+      StudioDirective directive = segment.directive();
+      if (directive == null) {
+        continue;
+      }
+      if (EVIDENCE.equals(directive.name())) {
+        usages.add(new AssetUsage(directive.attribute("key", ""), directive.attribute("alt", "")));
+      } else if (!INFO_CALLOUTS.contains(directive.name())
+          && !WARNING_CALLOUTS.contains(directive.name())) {
+        unsupported.add(directive.name());
+      }
+    }
+    return new ContentAnalysis(usages, List.copyOf(unsupported), plainText(bodyMarkdown));
+  }
+
+  /** 검색 색인용 평문. 렌더러가 이미 파싱한 것을 다시 쓴다 — 정규식으로 마크업을 지우는 별도 구현을 두면 두 해석이 갈라져 색인이 본문과 어긋난다. */
+  private String plainText(String bodyMarkdown) {
+    StringBuilder text = new StringBuilder();
+    for (MarkdownSegments.Segment segment : MarkdownSegments.split(bodyMarkdown)) {
+      String source = segment.directive() == null ? segment.markdown() : segment.directiveBody();
+      if (source == null || source.isBlank()) {
+        continue;
+      }
+      String plain = InlineRenderer.plainText(parser.parse(source));
+      if (!plain.isBlank()) {
+        if (!text.isEmpty()) {
+          text.append(' ');
+        }
+        text.append(plain.strip());
+      }
+    }
+    return text.toString();
+  }
+
+  private CaseRenderBlock renderDirective(
+      MarkdownSegments.Segment segment,
+      Map<String, ResolvedAssetView> assetsByKey,
+      HeadingIds headingIds,
+      List<String> warnings) {
+
+    StudioDirective directive = segment.directive();
+    if (EVIDENCE.equals(directive.name())) {
+      return evidence(directive, assetsByKey, warnings);
+    }
+    if (INFO_CALLOUTS.contains(directive.name()) || WARNING_CALLOUTS.contains(directive.name())) {
+      CalloutBlock callout = new CalloutBlock();
+      callout.setType(CalloutBlock.TypeEnum.CALLOUT);
+      callout.setTone(
+          WARNING_CALLOUTS.contains(directive.name())
+              ? CalloutBlock.ToneEnum.WARNING
+              : CalloutBlock.ToneEnum.INFO);
+      callout.setLabel(directive.argument());
+      callout.setContent(
+          InlineRenderer.render(
+              parser.parse(segment.directiveBody()).getFirstChild() == null
+                  ? parser.parse("")
+                  : parser.parse(segment.directiveBody()).getFirstChild()));
+      return callout;
+    }
+    // 설계 05장 §4: 알 수 없는 종류는 경고를 만들고 일반 blockquote 로 안전하게 처리한다.
+    warnings.add("UNSUPPORTED_DIRECTIVE:" + directive.name());
+    List<CaseRenderBlock> fallback =
+        new BlockRenderer(headingIds, warnings)
+            .render(parser.parse("> " + segment.directiveBody().replace("\n", "\n> ")));
+    return fallback.isEmpty() ? null : fallback.getFirst();
+  }
+
+  private static CaseRenderBlock evidence(
+      StudioDirective directive,
+      Map<String, ResolvedAssetView> assetsByKey,
+      List<String> warnings) {
+
+    String key = directive.attribute("key", "");
+    if (key.isBlank()) {
+      warnings.add("EVIDENCE_WITHOUT_KEY");
+      return null;
+    }
+    ResolvedAssetView resolved = assetsByKey.get(key);
+    if (resolved == null) {
+      // 미해결 key 를 임의 경로로 채워 넣지 않는다 — 렌더 결과가 존재하지 않는 파일을 가리키게 된다.
+      // 게시는 검증이 막고, 미리보기에서는 이 경고가 사용자에게 무엇이 빠졌는지 알려준다.
+      warnings.add("UNRESOLVED_ASSET_KEY:" + key);
+      return null;
+    }
+
+    EvidenceFigureBlock block = new EvidenceFigureBlock();
+    block.setType(EvidenceFigureBlock.TypeEnum.EVIDENCE_FIGURE);
+    block.setKey(key);
+    block.setAlt(directive.attribute("alt", ""));
+    block.setCaption(directive.attribute("caption", ""));
+    block.setZoom(directive.booleanAttribute("zoom"));
+
+    ResolvedAsset asset = new ResolvedAsset();
+    asset.setAssetId(resolved.assetId());
+    asset.setAssetKey(resolved.assetKey());
+    asset.setMediaType(resolved.mediaType());
+    asset.setPublicPath(resolved.publicPath());
+    asset.setWidth(resolved.width());
+    asset.setHeight(resolved.height());
+    asset.setDecorative(resolved.decorative());
+    block.setAsset(asset);
+    return block;
+  }
+}

src/adapter/inbound/web/src/main/java/dev/caskeleton/adapter/inbound/web/techlog/studio/render/StudioDirective.java

@@ -0,0 +1,47 @@
+package dev.caskeleton.adapter.inbound.web.techlog.studio.render;
+
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * {@code :::name key="value" ...} 한 줄을 이름과 속성으로 나눈다.
+ *
+ * <p>directive 를 commonmark 확장이 아니라 줄 단위 스캔으로 다루는 이유: v1 문법에서 directive 는 중첩이 없고 줄 맨 앞에서만 열린다(설계
+ * 05장 §3.2, §4). 줄 스캔이면 동작이 눈으로 확인되고, 지원하지 않는 directive 를 "조용히 다른 것으로 해석"하는 일이 구조적으로 생기지 않는다.
+ */
+record StudioDirective(String name, String argument, Map<String, String> attributes) {
+
+  private static final Pattern OPENING = Pattern.compile("^:::([A-Za-z][A-Za-z0-9_-]*)\\s*(.*)$");
+  private static final Pattern ATTRIBUTE = Pattern.compile("([A-Za-z][A-Za-z0-9_-]*)=\"([^\"]*)\"");
+
+  static StudioDirective parse(String line) {
+    Matcher opening = OPENING.matcher(line.strip());
+    if (!opening.matches()) {
+      return null;
+    }
+    String rest = opening.group(2).strip();
+
+    Map<String, String> attributes = new LinkedHashMap<>();
+    Matcher attribute = ATTRIBUTE.matcher(rest);
+    int firstAttributeStart = rest.length();
+    while (attribute.find()) {
+      if (attribute.start() < firstAttributeStart) {
+        firstAttributeStart = attribute.start();
+      }
+      attributes.put(attribute.group(1), attribute.group(2));
+    }
+    String argument = rest.substring(0, firstAttributeStart).strip();
+    return new StudioDirective(opening.group(1), argument, attributes);
+  }
+
+  String attribute(String name, String fallback) {
+    String value = attributes.get(name);
+    return value == null ? fallback : value;
+  }
+
+  boolean booleanAttribute(String name) {
+    return "true".equalsIgnoreCase(attributes.get(name));
+  }
+}

src/adapter/inbound/web/src/main/java/dev/caskeleton/adapter/inbound/web/techlog/studio/support/StudioCursors.java

@@ -0,0 +1,122 @@
+package dev.caskeleton.adapter.inbound.web.techlog.studio.support;
+
+import dev.caskeleton.adapter.inbound.web.cursor.CursorCodec;
+import dev.caskeleton.adapter.inbound.web.cursor.CursorException;
+import dev.caskeleton.application.techlog.error.StudioError;
+import dev.caskeleton.application.techlog.error.StudioException;
+import dev.caskeleton.application.techlog.studio.query.DocumentCursorPosition;
+import java.nio.charset.StandardCharsets;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.time.Clock;
+import java.time.Instant;
+import java.time.format.DateTimeParseException;
+import java.util.Base64;
+import java.util.HexFormat;
+import java.util.UUID;
+import org.springframework.stereotype.Component;
+
+/**
+ * 계약이 "opaque 하고 정규화된 필터·정렬에 결합된 커서"라고 정한 것을 실제로 그렇게 만든다.
+ *
+ * <p>필터 지문을 커서 안에 함께 서명한다 — 그래야 필터를 바꾼 뒤 옛 커서를 재사용하는 요청을 거절할 수 있다. 거절하지 않으면 정렬 키의 의미가 달라진 채로 페이지가
+ * 이어져 사용자에게는 항목이 조용히 사라지거나 중복돼 보인다.
+ */
+@Component
+public class StudioCursors {
+
+  private static final String SEPARATOR = "~";
+
+  /**
+   * 지문 입력의 필드 구분자(ASCII unit separator). 사용자 입력에 나타나지 않는 제어문자라 인접한 필드가 서로 섞여 같은 지문을 만드는 일이 없다 — 예를
+   * 들어 구분자가 없으면 (kind="A", q="B")와 (kind="AB", q="")가 같은 값이 된다.
+   */
+  private static final char FIELD_SEPARATOR = (char) 0x1f;
+
+  private final CursorCodec codec;
+  private final Clock clock;
+
+  public StudioCursors(StudioSettings settings, Clock clock) {
+    this.codec =
+        new CursorCodec(
+            settings.cursorSigningKey().getBytes(StandardCharsets.UTF_8), CursorCodec.DEFAULT_TTL);
+    this.clock = clock;
+  }
+
+  /** 이 페이지 요청의 필터·정렬을 대표하는 값. 커서에 함께 실린다. */
+  public static String fingerprint(String... normalizedFilterParts) {
+    StringBuilder joined = new StringBuilder();
+    for (String part : normalizedFilterParts) {
+      joined.append(part == null ? "" : part).append(FIELD_SEPARATOR);
+    }
+    try {
+      byte[] digest =
+          MessageDigest.getInstance("SHA-256")
+              .digest(joined.toString().getBytes(StandardCharsets.UTF_8));
+      return HexFormat.of().formatHex(digest, 0, 8);
+    } catch (NoSuchAlgorithmException e) {
+      throw new IllegalStateException("SHA-256 must be available on every supported JVM", e);
+    }
+  }
+
+  public String encode(String payload, String fingerprint) {
+    String body =
+        fingerprint
+            + SEPARATOR
+            + Base64.getUrlEncoder()
+                .withoutPadding()
+                .encodeToString(payload.getBytes(StandardCharsets.UTF_8));
+    return codec.encode(body, clock.instant());
+  }
+
+  /**
+   * 커서를 풀어 페이지 위치로 돌려준다.
+   *
+   * @throws StudioException 서명·만료·필터 지문 중 하나라도 맞지 않으면 {@code REQUEST_VALIDATION_FAILED}
+   */
+  public DocumentCursorPosition decode(String cursor, String fingerprint, boolean titleSort) {
+    String body;
+    try {
+      body = codec.decode(cursor, clock.instant());
+    } catch (CursorException e) {
+      throw StudioException.of(
+          StudioError.REQUEST_VALIDATION_FAILED, "cursor is not usable: " + e.getMessage());
+    }
+    int separator = body.indexOf(SEPARATOR);
+    if (separator <= 0) {
+      throw malformed();
+    }
+    if (!fingerprint.equals(body.substring(0, separator))) {
+      throw StudioException.of(
+          StudioError.REQUEST_VALIDATION_FAILED,
+          "cursor was issued for a different filter or sort; start from the first page");
+    }
+    String payload =
+        new String(
+            Base64.getUrlDecoder().decode(body.substring(separator + SEPARATOR.length())),
+            StandardCharsets.UTF_8);
+    int pipe = payload.lastIndexOf('|');
+    if (pipe <= 0) {
+      throw malformed();
+    }
+    String head = payload.substring(0, pipe);
+    UUID id;
+    try {
+      id = UUID.fromString(payload.substring(pipe + 1));
+    } catch (IllegalArgumentException e) {
+      throw malformed();
+    }
+    if (titleSort) {
+      return new DocumentCursorPosition(null, head, id);
+    }
+    try {
+      return new DocumentCursorPosition(Instant.parse(head), null, id);
+    } catch (DateTimeParseException e) {
+      throw malformed();
+    }
+  }
+
+  private static StudioException malformed() {
+    return StudioException.of(StudioError.REQUEST_VALIDATION_FAILED, "cursor is malformed");
+  }
+}

src/adapter/inbound/web/src/main/java/dev/caskeleton/adapter/inbound/web/techlog/studio/support/StudioIdempotency.java

@@ -0,0 +1,90 @@
+package dev.caskeleton.adapter.inbound.web.techlog.studio.support;
+
+import dev.caskeleton.adapter.inbound.web.idempotency.IdempotencyKeySupport;
+import dev.caskeleton.application.idempotency.IdempotencyContext;
+import dev.caskeleton.application.idempotency.IdempotencyExecutor;
+import dev.caskeleton.application.techlog.error.StudioError;
+import dev.caskeleton.application.techlog.error.StudioException;
+import jakarta.servlet.http.HttpServletRequest;
+import java.util.Optional;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.function.Supplier;
+import org.springframework.beans.factory.ObjectProvider;
+import org.springframework.stereotype.Component;
+
+/**
+ * 계약이 모든 mutation 에 요구하는 {@code Idempotency-Key} 처리(spec §8.2).
+ *
+ * <p>재생 여부를 스스로 판단하지 않고 <b>동작이 실제로 실행됐는지</b>로 안다 — 저장소를 미리 들여다보고 판정하면 그 사이에 다른 요청이 끼어들 수 있어 헤더가
+ * 거짓말을 하게 된다. 실행되지 않았다면 결과는 재생된 것이다.
+ *
+ * <p>{@code IdempotencyExecutor} 는 provider 가 {@code disabled} 인 배포에는 빈이 없다. 그때는 키의 존재만 계약대로 강제하고
+ * 실행은 그대로 통과시킨다 — 여기서 빈을 필수로 요구하면 그런 배포는 Studio 컨트롤러 때문에 부팅 자체가 실패한다.
+ */
+@Component
+public class StudioIdempotency {
+
+  /**
+   * 계약 {@code components.headers.IdempotencyReplayed}. {@code ApiHeaders}에 두지 않는 이유는 그 파일이 템플릿
+   * SSOT({@code wiki/projects/ca-tmpl/registries/headers.yaml}) 소유라 이 기능이 손대면 다음 동기화에서 충돌하기 때문이다.
+   */
+  public static final String IDEMPOTENCY_REPLAYED = "Idempotency-Replayed";
+
+  /** 계약 {@code components.parameters.IdempotencyKey.schema.maxLength}. */
+  private static final int MAX_KEY_LENGTH = 200;
+
+  private final ObjectProvider<IdempotencyExecutor> executors;
+  private final IdempotencyKeySupport keys;
+
+  public StudioIdempotency(
+      ObjectProvider<IdempotencyExecutor> executors, IdempotencyKeySupport keys) {
+    this.executors = executors;
+    this.keys = keys;
+  }
+
+  /**
+   * 결과와 그 결과가 재생된 것인지 여부.
+   *
+   * @param <R> 동작의 결과 타입
+   */
+  public record Outcome<R>(R result, boolean replayed) {}
+
+  public <R> Outcome<R> run(
+      HttpServletRequest request,
+      String operationId,
+      Object requestPayload,
+      Class<R> responseType,
+      Supplier<R> action) {
+
+    String key = requireKey(request);
+    IdempotencyExecutor executor = executors.getIfAvailable();
+    if (executor == null) {
+      return new Outcome<>(action.get(), false);
+    }
+
+    AtomicBoolean executed = new AtomicBoolean(false);
+    R result =
+        executor.execute(
+            IdempotencyContext.of(keys.scope(key, operationId), keys.fingerprint(requestPayload)),
+            () -> {
+              executed.set(true);
+              return action.get();
+            },
+            keys.codec(responseType));
+    return new Outcome<>(result, !executed.get());
+  }
+
+  private String requireKey(HttpServletRequest request) {
+    Optional<String> key = keys.idempotencyKey(request);
+    if (key.isEmpty()) {
+      throw StudioException.of(
+          StudioError.REQUEST_VALIDATION_FAILED, "the Idempotency-Key header is required");
+    }
+    if (key.get().length() > MAX_KEY_LENGTH) {
+      throw StudioException.of(
+          StudioError.REQUEST_VALIDATION_FAILED,
+          "the Idempotency-Key header must be at most " + MAX_KEY_LENGTH + " characters");
+    }
+    return key.get();
+  }
+}

src/adapter/inbound/web/src/main/java/dev/caskeleton/adapter/inbound/web/techlog/studio/support/StudioPrincipals.java

@@ -0,0 +1,23 @@
+package dev.caskeleton.adapter.inbound.web.techlog.studio.support;
+
+import dev.caskeleton.adapter.inbound.web.auth.AuthenticatedPrincipal;
+import dev.caskeleton.application.techlog.error.StudioError;
+import dev.caskeleton.application.techlog.error.StudioException;
+
+/**
+ * 감사 컬럼({@code created_by}/{@code updated_by})에 남길 주체를 뽑는다.
+ *
+ * <p>{@code idpUserId} 를 쓴다 — 이메일이나 표시 이름은 사용자가 바꿀 수 있어 과거 기록의 주체를 되짚을 수 없게 된다.
+ */
+public final class StudioPrincipals {
+
+  private StudioPrincipals() {}
+
+  public static String require(AuthenticatedPrincipal principal) {
+    if (principal == null || principal.idpUserId() == null || principal.idpUserId().isBlank()) {
+      throw StudioException.of(
+          StudioError.AUTHENTICATION_REQUIRED, "the request has no usable authenticated principal");
+    }
+    return principal.idpUserId();
+  }
+}

src/adapter/inbound/web/src/main/java/dev/caskeleton/adapter/inbound/web/techlog/studio/support/StudioSettings.java

@@ -0,0 +1,44 @@
+package dev.caskeleton.adapter.inbound.web.techlog.studio.support;
+
+import java.nio.charset.StandardCharsets;
+import java.time.Duration;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+
+/**
+ * {@code ca-skeleton.techlog.studio.*}. Studio 고유 설정을 템플릿 소유 파일({@code PresentationSettings} 등)에 섞지
+ * 않고 여기 모은다 — 그 파일들은 template sync 대상이라 이 기능이 손대면 다음 동기화에서 충돌한다.
+ *
+ * @param cursorSigningKey 목록 커서 서명 키. 비어 있으면 개발용 값으로 대체하고 경고한다 — 커서에는 권한이 실리지 않으므로 부팅을 막을 사유는 아니지만,
+ *     인스턴스마다 값이 다르면 한 인스턴스가 발급한 커서를 다른 인스턴스가 거부한다.
+ * @param validationTtl 검증 결과가 유효한 기간({@code studio_validation.valid_until})
+ * @param previewTtl 미리보기가 유효한 기간({@code studio_preview.expires_at})
+ */
+@ConfigurationProperties(prefix = "ca-skeleton.techlog.studio")
+public record StudioSettings(String cursorSigningKey, Duration validationTtl, Duration previewTtl) {
+
+  private static final Logger log = LoggerFactory.getLogger(StudioSettings.class);
+  private static final String DEV_CURSOR_KEY = "__LOCAL_DEV_techlog_studio_cursor_signing_key";
+  private static final int MIN_KEY_BYTES = 16;
+  private static final Duration DEFAULT_VALIDATION_TTL = Duration.ofHours(1);
+  private static final Duration DEFAULT_PREVIEW_TTL = Duration.ofHours(24);
+
+  public StudioSettings {
+    if (cursorSigningKey == null
+        || cursorSigningKey.getBytes(StandardCharsets.UTF_8).length < MIN_KEY_BYTES) {
+      log.warn(
+          "APP_STUDIO_CURSOR_SIGNING_KEY is missing or shorter than {} bytes; using a development"
+              + " key. Cursors issued by one instance verify on another only while every instance"
+              + " falls back to the same value.",
+          MIN_KEY_BYTES);
+      cursorSigningKey = DEV_CURSOR_KEY;
+    }
+    if (validationTtl == null || validationTtl.isZero() || validationTtl.isNegative()) {
+      validationTtl = DEFAULT_VALIDATION_TTL;
+    }
+    if (previewTtl == null || previewTtl.isZero() || previewTtl.isNegative()) {
+      previewTtl = DEFAULT_PREVIEW_TTL;
+    }
+  }
+}

src/adapter/inbound/web/src/test/java/dev/caskeleton/adapter/inbound/web/techlog/studio/contract/StudioContractUnionJacksonTest.java

@@ -0,0 +1,142 @@
+package dev.caskeleton.adapter.inbound.web.techlog.studio.contract;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.CasePublicRenderModel;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.CaseRenderBlock;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.CaseWorkingCopy;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.HeadingBlock;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.Inline;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.InlineText;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.NextAction;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.PublicRenderModel;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.QuestionInput;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.WorkingCopy;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.WorkingCopyDetail;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.WorkingCopyInput;
+import java.util.List;
+import java.util.UUID;
+import org.junit.jupiter.api.Test;
+import tools.jackson.databind.ObjectMapper;
+
+/**
+ * 계약의 discriminator union이 Jackson 양방향으로 계약대로 동작하는지 고정한다.
+ *
+ * <p>이 게이트가 필요한 이유는 <b>컴파일이 이걸 못 잡기 때문</b>이다. Plan 01에서 {@code useOneOfInterfaces=false}로 생성한
+ * union은 컴파일 오류 0개였지만 런타임에는 양방향 모두 계약을 위반했다 — 역직렬화는 {@code InvalidTypeIdException}("CaseInput not
+ * subtype of WorkingCopyInput"), 직렬화는 판별 필드에 {@code kind} 값 대신 클래스 simple name. 지금은 {@code
+ * prepareStudioCodegenSpec}이 계약에서 {@code x-implements}와 union interface를 파생시켜 고쳤고, 이 테스트가 그 파생 배선이
+ * 살아 있는지를 지킨다. 파생이 깨지면 여기서 빨간불이 난다.
+ *
+ * <p>{@code new ObjectMapper()}는 이 모듈의 다른 테스트와 같은 관용구다 — Jackson 3({@code tools.jackson})이며 앱의 HTTP
+ * 변환기와 같은 계열이다. Jackson 2 ({@code com.fasterxml.jackson.databind})로 검증하면 프로덕션에서 실제로 쓰이지 않는 경로를 재는
+ * 셈이라 의미가 없다.
+ */
+class StudioContractUnionJacksonTest {
+
+  private final ObjectMapper mapper = new ObjectMapper();
+
+  private static CaseWorkingCopy caseWorkingCopy() {
+    CaseWorkingCopy document = new CaseWorkingCopy();
+    document.setKind(CaseWorkingCopy.KindEnum.CASE);
+    document.setId(UUID.fromString("00000000-0000-4000-8000-000000000001"));
+    document.setVersion(1);
+    document.setTitle("제목");
+    document.setSlug("some-slug");
+    document.setSummary("요약");
+    document.setProblem("문제");
+    document.setConclusion("결론");
+    document.setEnvironment("환경");
+    document.setReproduction("재현");
+    document.setBodyMarkdown("본문");
+    return document;
+  }
+
+  @Test
+  void workingCopyUnionSerializesTheContractDiscriminatorAndRoundTrips() {
+    WorkingCopyDetail detail = new WorkingCopyDetail();
+    detail.setDocument(caseWorkingCopy());
+    detail.setDependencyRevision("rev-1");
+    detail.setNextAction(NextAction.VALIDATE);
+
+    String json = mapper.writeValueAsString(detail);
+
+    // 판별 필드는 계약이 정한 값이어야 한다. 클래스 이름("CaseWorkingCopy")이 나가면 프론트가 깨진다.
+    assertThat(json).contains("\"kind\":\"CASE\"");
+    assertThat(json).doesNotContain("CaseWorkingCopy");
+    // 판별 필드가 두 번 나가면 안 된다 — union interface가 As.EXISTING_PROPERTY인 이유다.
+    assertThat(json.split("\"kind\":", -1)).hasSize(2);
+    // slug는 문자열이다. 계약의 문자열 oneOf를 접지 않으면 여기서 {} 가 나간다.
+    assertThat(json).contains("\"slug\":\"some-slug\"");
+
+    WorkingCopyDetail back = mapper.readValue(json, WorkingCopyDetail.class);
+
+    assertThat(back.getDocument()).isInstanceOf(CaseWorkingCopy.class);
+    assertThat(((CaseWorkingCopy) back.getDocument()).getProblem()).isEqualTo("문제");
+  }
+
+  @Test
+  void workingCopyInputUnionRoundTripsThroughTheDeclaredUnionType() {
+    QuestionInput input = new QuestionInput();
+    input.setKind(QuestionInput.KindEnum.QUESTION);
+    input.setTitle("질문");
+    input.setSlug("");
+    input.setSummary("요약");
+    input.setNextValidation("다음 검증");
+
+    WorkingCopyInput declared = input;
+    String json = mapper.writeValueAsString(declared);
+    assertThat(json).contains("\"kind\":\"QUESTION\"");
+
+    WorkingCopyInput back = mapper.readValue(json, WorkingCopyInput.class);
+    assertThat(back).isInstanceOf(QuestionInput.class);
+    assertThat(((QuestionInput) back).getNextValidation()).isEqualTo("다음 검증");
+  }
+
+  @Test
+  void renderBlockAndInlineUnionsRoundTripInsideCollections() {
+    InlineText text = new InlineText();
+    text.setType(InlineText.TypeEnum.TEXT);
+    text.setText("본문 조각");
+
+    HeadingBlock heading = new HeadingBlock();
+    heading.setType(HeadingBlock.TypeEnum.HEADING);
+    heading.setId("h-1");
+    heading.setLevel(2);
+    heading.setContent(List.of(text));
+
+    CasePublicRenderModel model = new CasePublicRenderModel();
+    model.setKind(CasePublicRenderModel.KindEnum.CASE);
+    model.setSlug("some-slug");
+    model.setTitle("제목");
+    model.setSummary("요약");
+    model.setPublicPath("/case/some-slug");
+    model.setBodyBlocks(List.of(heading));
+
+    PublicRenderModel declared = model;
+    String json = mapper.writeValueAsString(declared);
+    assertThat(json).contains("\"kind\":\"CASE\"");
+    assertThat(json).contains("\"type\":\"HEADING\"");
+    assertThat(json).contains("\"type\":\"TEXT\"");
+
+    PublicRenderModel back = mapper.readValue(json, PublicRenderModel.class);
+    assertThat(back).isInstanceOf(CasePublicRenderModel.class);
+
+    List<CaseRenderBlock> blocks = ((CasePublicRenderModel) back).getBodyBlocks();
+    assertThat(blocks).hasSize(1).first().isInstanceOf(HeadingBlock.class);
+
+    List<Inline> content = ((HeadingBlock) blocks.get(0)).getContent();
+    assertThat(content).hasSize(1).first().isInstanceOf(InlineText.class);
+    assertThat(((InlineText) content.get(0)).getText()).isEqualTo("본문 조각");
+  }
+
+  @Test
+  void unionDeserializationRejectsAnUnknownDiscriminatorInsteadOfSilentlyDroppingIt() {
+    String json = "{\"kind\":\"NOT_A_KIND\",\"title\":\"제목\"}";
+
+    assertThat(
+            org.assertj.core.api.Assertions.catchThrowable(
+                () -> mapper.readValue(json, WorkingCopy.class)))
+        .isNotNull();
+  }
+}

src/adapter/inbound/web/src/test/java/dev/caskeleton/adapter/inbound/web/techlog/studio/render/StudioContentRendererTest.java

@@ -0,0 +1,223 @@
+package dev.caskeleton.adapter.inbound.web.techlog.studio.render;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.BlockquoteBlock;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.CalloutBlock;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.CaseRenderBlock;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.CodeBlock;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.DataTableBlock;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.EvidenceFigureBlock;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.HeadingBlock;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.InlineCode;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.InlineStrong;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.InlineText;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.ParagraphBlock;
+import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.UnorderedListBlock;
+import dev.caskeleton.application.techlog.studio.model.ResolvedAssetView;
+import dev.caskeleton.application.techlog.studio.port.out.ContentAnalyzerPort;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+import org.junit.jupiter.api.Test;
+
+/**
+ * 렌더러가 설계 05장이 정한 문법을 계약 블록으로 옮기는지 고정한다.
+ *
+ * <p>여기서 지키는 것은 "그럴듯하게 렌더링된다"가 아니라 <b>계약 제약을 어기지 않는다</b>이다 — heading level 범위, 표의 최소 열 수, 미해결 Asset
+ * 을 지어내지 않는 것. 이것들이 깨지면 미리보기는 화면에 나오지만 게시된 문서가 계약을 위반한다.
+ */
+class StudioContentRendererTest {
+
+  private final StudioContentRenderer renderer = new StudioContentRenderer();
+
+  private static ResolvedAssetView asset(String key, boolean decorative) {
+    return new ResolvedAssetView(
+        UUID.fromString("00000000-0000-4000-8000-000000000009"),
+        key,
+        "image/png",
+        "/media/00000000-0000-4000-8000-000000000009",
+        800,
+        600,
+        decorative);
+  }
+
+  @Test
+  void headingsGetContractLevelsAndStableIds() {
+    var rendered =
+        renderer.render(
+            """
+            # Authorization Code Flow
+            ###### 아주 깊은 제목
+            ## 결론
+            ## 결론
+            """,
+            Map.of());
+
+    List<CaseRenderBlock> blocks = rendered.blocks();
+    assertThat(blocks).hasSize(4).allMatch(HeadingBlock.class::isInstance);
+
+    // 계약의 HeadingBlock.level 은 2..4 다. h1 과 h6 를 그대로 내보내면 계약 위반이다.
+    assertThat(((HeadingBlock) blocks.get(0)).getLevel()).isEqualTo(2);
+    assertThat(((HeadingBlock) blocks.get(1)).getLevel()).isEqualTo(4);
+
+    assertThat(((HeadingBlock) blocks.get(0)).getId()).isEqualTo("authorization-code-flow");
+    assertThat(((HeadingBlock) blocks.get(2)).getId()).isEqualTo("결론");
+    // 같은 제목이 두 번이면 두 번째부터 suffix 가 붙는다(설계 05장 §6 8단계).
+    assertThat(((HeadingBlock) blocks.get(3)).getId()).isEqualTo("결론-2");
+  }
+
+  @Test
+  void headingIdFollowsTheDesignedNormalisation() {
+    var rendered = renderer.render("## JPA N+1 문제\n", Map.of());
+    assertThat(((HeadingBlock) rendered.blocks().getFirst()).getId()).isEqualTo("jpa-n-1-문제");
+  }
+
+  @Test
+  void inlineMarkupBecomesTheContractInlineUnion() {
+    var rendered = renderer.render("본문 **강조** 와 `code` 조각\n", Map.of());
+
+    ParagraphBlock paragraph = (ParagraphBlock) rendered.blocks().getFirst();
+    assertThat(paragraph.getContent()).hasSize(5);
+    assertThat(paragraph.getContent().get(0)).isInstanceOf(InlineText.class);
+    assertThat(paragraph.getContent().get(1)).isInstanceOf(InlineStrong.class);
+    assertThat(paragraph.getContent().get(3)).isInstanceOf(InlineCode.class);
+    assertThat(((InlineCode) paragraph.getContent().get(3)).getCode()).isEqualTo("code");
+  }
+
+  @Test
+  void listsCodeAndTablesBecomeTheirContractBlocks() {
+    var rendered =
+        renderer.render(
+            """
+            - 첫째
+            - 둘째
+
+            ```java
+            int x = 1;
+            ```
+
+            | 이름 | 값 |
+            | --- | ---: |
+            | a | 1 |
+            """,
+            Map.of());
+
+    List<CaseRenderBlock> blocks = rendered.blocks();
+    assertThat(blocks.get(0)).isInstanceOf(UnorderedListBlock.class);
+    assertThat(((UnorderedListBlock) blocks.get(0)).getItems()).hasSize(2);
+
+    CodeBlock code = (CodeBlock) blocks.get(1);
+    assertThat(code.getLanguage()).isEqualTo("java");
+    assertThat(code.getCode()).contains("int x = 1;");
+
+    DataTableBlock table = (DataTableBlock) blocks.get(2);
+    assertThat(table.getColumns()).hasSize(2);
+    assertThat(table.getColumns().get(1).getAlignment())
+        .isEqualTo(
+            dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.DataTableColumn
+                .AlignmentEnum.RIGHT);
+    assertThat(table.getRows()).hasSize(1);
+    assertThat(table.getRows().getFirst().getCells().getFirst().getColumnId()).isEqualTo("col-1");
+  }
+
+  @Test
+  void calloutDirectivesBecomeCalloutBlocksWithTheContractTone() {
+    var rendered =
+        renderer.render(
+            """
+            :::warning 주의
+            Presigned URL 을 본문에 저장하지 않습니다.
+            :::
+
+            :::note
+            확인했습니다.
+            :::
+            """,
+            Map.of());
+
+    CalloutBlock warning = (CalloutBlock) rendered.blocks().get(0);
+    assertThat(warning.getTone()).isEqualTo(CalloutBlock.ToneEnum.WARNING);
+    assertThat(warning.getLabel()).isEqualTo("주의");
+
+    CalloutBlock note = (CalloutBlock) rendered.blocks().get(1);
+    // 설계는 note/tip/warning/danger 네 가지를 허용하지만 계약의 tone 은 두 가지다.
+    assertThat(note.getTone()).isEqualTo(CalloutBlock.ToneEnum.INFO);
+  }
+
+  @Test
+  void anUnknownDirectiveDegradesToAQuoteAndWarnsInsteadOfBeingSilentlyReinterpreted() {
+    var rendered =
+        renderer.render(
+            """
+            :::mermaid
+            graph TD;
+            :::
+            """,
+            Map.of());
+
+    assertThat(rendered.blocks().getFirst()).isInstanceOf(BlockquoteBlock.class);
+    assertThat(rendered.warnings()).contains("UNSUPPORTED_DIRECTIVE:mermaid");
+  }
+
+  @Test
+  void evidenceDirectiveResolvesThroughTheInjectedAssetManifest() {
+    var rendered =
+        renderer.render(
+            ":::evidence key=\"flow\" alt=\"요청 흐름\" caption=\"흐름도\" zoom=\"true\"\n",
+            Map.of("flow", asset("flow", false)));
+
+    EvidenceFigureBlock figure = (EvidenceFigureBlock) rendered.blocks().getFirst();
+    assertThat(figure.getKey()).isEqualTo("flow");
+    assertThat(figure.getAlt()).isEqualTo("요청 흐름");
+    assertThat(figure.getCaption()).isEqualTo("흐름도");
+    assertThat(figure.getZoom()).isTrue();
+    assertThat(figure.getAsset().getPublicPath())
+        .isEqualTo("/media/00000000-0000-4000-8000-000000000009");
+  }
+
+  @Test
+  void anUnresolvedAssetKeyIsDroppedWithAWarningRatherThanPointedAtNothing() {
+    var rendered = renderer.render(":::evidence key=\"missing\" alt=\"x\"\n", Map.of());
+
+    // 임의 경로를 지어내면 렌더 결과가 존재하지 않는 파일을 가리킨다.
+    assertThat(rendered.blocks()).isEmpty();
+    assertThat(rendered.warnings()).contains("UNRESOLVED_ASSET_KEY:missing");
+  }
+
+  @Test
+  void directiveSyntaxInsideACodeFenceIsNotADirective() {
+    var rendered =
+        renderer.render(
+            """
+            ```markdown
+            :::evidence key="example"
+            ```
+            """,
+            Map.of());
+
+    assertThat(rendered.blocks().getFirst()).isInstanceOf(CodeBlock.class);
+    assertThat(rendered.warnings()).isEmpty();
+  }
+
+  @Test
+  void analysisReportsEveryUsageSiteSeparatelyBecauseAltIsPerUsage() {
+    ContentAnalyzerPort.ContentAnalysis analysis =
+        renderer.analyze(
+            """
+            :::evidence key="flow" alt="첫 번째"
+
+            :::evidence key="flow" alt=""
+
+            :::mermaid
+            :::
+            """);
+
+    assertThat(analysis.assetUsages())
+        .extracting(ContentAnalyzerPort.AssetUsage::assetKey)
+        .containsExactly("flow", "flow");
+    assertThat(analysis.assetUsages().get(0).alt()).isEqualTo("첫 번째");
+    assertThat(analysis.assetUsages().get(1).alt()).isEmpty();
+    assertThat(analysis.unsupportedDirectives()).containsExactly("mermaid");
+  }
+}

src/adapter/outbound/persistence-jpa/build.gradle

@@ -26,6 +26,12 @@ dependencies {
     implementation project(':shared-contract')
 
     implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+    // Studio 편집본의 jsonb 컬럼(reference_detail.rules/examples, open_question.options,
+    // project_decision.consequences, applies_to/excluded_scope)을 읽고 쓰려면 이 모듈에 JSON 매퍼가
+    // 필요하다. Jackson 2 databind 가 data-jpa 경유로 이미 classpath 에 딸려오지만 그건 선언하지 않은
+    // 우연한 가용성이고, 이 저장소는 dependency locking 을 쓴다 — 앱의 다른 계층과 같은
+    // Jackson 3(tools.jackson)을 명시적으로 선언한다.
+    implementation 'org.springframework.boot:spring-boot-starter-jackson'
     // feature-distributed-lock-contract: Spring Integration JDBC LockRegistry backs the
     // multi-instance distributedLockProvider. Version managed by Spring Boot BOM.
     implementation 'org.springframework.integration:spring-integration-jdbc'
@@ -117,6 +123,14 @@ def postgresqlTechLogCatalogQueryIntegrationTest = registerPostgreSqlReadinessTe
         'postgresqlTechLogCatalogQueryIntegrationTest',
         'dev.caskeleton.adapter.outbound.persistence.techlog.query.JdbcCatalogQueryAdapterTest')
 
+// 슬라이스 2~5: Studio 영속 경로 전체(편집본 4종 왕복, 낙관적 잠금, union 목록, 의존 해석,
+// validation/preview artifact, 게시 20단계, 게시 취소, Asset)를 실제 PostgreSQL 위에서 돌린다.
+// 표준 check 는 Testcontainers 를 돌리지 않으므로, 이 태스크가 없으면 그 SQL 은 한 번도 실행되지
+// 않은 채로 빌드가 통과한다.
+def postgresqlTechLogStudioPersistenceIntegrationTest = registerPostgreSqlReadinessTest(
+        'postgresqlTechLogStudioPersistenceIntegrationTest',
+        'dev.caskeleton.adapter.outbound.persistence.techlog.studio.StudioPersistenceIntegrationTest')
+
 def verifyJpaSqlConstructionSafety = tasks.register('verifyJpaSqlConstructionSafety') {
     group = 'verification'
     description = 'Rejects concatenated SQL construction and non-parameterized PostgreSQL timeout configuration.'

src/adapter/outbound/persistence-jpa/gradle.lockfile

@@ -152,7 +152,7 @@ org.springframework.boot:spring-boot-flyway:4.0.0=compileClasspath,postgresqlInt
 org.springframework.boot:spring-boot-hibernate:4.0.0=compileClasspath,postgresqlIntegrationTestCompileClasspath,postgresqlIntegrationTestRuntimeClasspath,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
 org.springframework.boot:spring-boot-http-client:4.0.0=postgresqlIntegrationTestCompileClasspath,postgresqlIntegrationTestRuntimeClasspath,testCompileClasspath,testRuntimeClasspath
 org.springframework.boot:spring-boot-http-converter:4.0.0=postgresqlIntegrationTestCompileClasspath,postgresqlIntegrationTestRuntimeClasspath,testCompileClasspath,testRuntimeClasspath
-org.springframework.boot:spring-boot-jackson:4.0.0=postgresqlIntegrationTestCompileClasspath,postgresqlIntegrationTestRuntimeClasspath,testCompileClasspath,testRuntimeClasspath
+org.springframework.boot:spring-boot-jackson:4.0.0=compileClasspath,postgresqlIntegrationTestCompileClasspath,postgresqlIntegrationTestRuntimeClasspath,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
 org.springframework.boot:spring-boot-jdbc:4.0.0=compileClasspath,postgresqlIntegrationTestCompileClasspath,postgresqlIntegrationTestRuntimeClasspath,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
 org.springframework.boot:spring-boot-jpa:4.0.0=compileClasspath,postgresqlIntegrationTestCompileClasspath,postgresqlIntegrationTestRuntimeClasspath,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
 org.springframework.boot:spring-boot-persistence:4.0.0=compileClasspath,postgresqlIntegrationTestCompileClasspath,postgresqlIntegrationTestRuntimeClasspath,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
@@ -163,7 +163,7 @@ org.springframework.boot:spring-boot-sql:4.0.0=compileClasspath,postgresqlIntegr
 org.springframework.boot:spring-boot-starter-data-jpa:4.0.0=compileClasspath,postgresqlIntegrationTestCompileClasspath,postgresqlIntegrationTestRuntimeClasspath,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
 org.springframework.boot:spring-boot-starter-flyway:4.0.0=compileClasspath,postgresqlIntegrationTestCompileClasspath,postgresqlIntegrationTestRuntimeClasspath,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
 org.springframework.boot:spring-boot-starter-jackson-test:4.0.0=postgresqlIntegrationTestCompileClasspath,postgresqlIntegrationTestRuntimeClasspath,testCompileClasspath,testRuntimeClasspath
-org.springframework.boot:spring-boot-starter-jackson:4.0.0=postgresqlIntegrationTestCompileClasspath,postgresqlIntegrationTestRuntimeClasspath,testCompileClasspath,testRuntimeClasspath
+org.springframework.boot:spring-boot-starter-jackson:4.0.0=compileClasspath,postgresqlIntegrationTestCompileClasspath,postgresqlIntegrationTestRuntimeClasspath,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
 org.springframework.boot:spring-boot-starter-jdbc:4.0.0=compileClasspath,postgresqlIntegrationTestCompileClasspath,postgresqlIntegrationTestRuntimeClasspath,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
 org.springframework.boot:spring-boot-starter-logging:4.0.0=compileClasspath,postgresqlIntegrationTestCompileClasspath,postgresqlIntegrationTestRuntimeClasspath,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
 org.springframework.boot:spring-boot-starter-test:4.0.0=postgresqlIntegrationTestCompileClasspath,postgresqlIntegrationTestRuntimeClasspath,testCompileClasspath,testRuntimeClasspath
@@ -205,7 +205,7 @@ org.testcontainers:testcontainers:2.0.2=postgresqlIntegrationTestCompileClasspat
 org.xmlresolver:xmlresolver:5.3.3=checkstyle,spotbugs
 org.xmlunit:xmlunit-core:2.10.4=postgresqlIntegrationTestCompileClasspath,postgresqlIntegrationTestRuntimeClasspath,testCompileClasspath,testRuntimeClasspath
 org.yaml:snakeyaml:2.5=compileClasspath,postgresqlIntegrationTestCompileClasspath,postgresqlIntegrationTestRuntimeClasspath,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
-tools.jackson.core:jackson-core:3.0.2=postgresqlIntegrationTestCompileClasspath,postgresqlIntegrationTestRuntimeClasspath,testCompileClasspath,testRuntimeClasspath
+tools.jackson.core:jackson-core:3.0.2=compileClasspath,postgresqlIntegrationTestCompileClasspath,postgresqlIntegrationTestRuntimeClasspath,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
-tools.jackson.core:jackson-databind:3.0.2=postgresqlIntegrationTestCompileClasspath,postgresqlIntegrationTestRuntimeClasspath,testCompileClasspath,testRuntimeClasspath
+tools.jackson.core:jackson-databind:3.0.2=compileClasspath,postgresqlIntegrationTestCompileClasspath,postgresqlIntegrationTestRuntimeClasspath,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
-tools.jackson:jackson-bom:3.0.2=postgresqlIntegrationTestCompileClasspath,postgresqlIntegrationTestRuntimeClasspath,testCompileClasspath,testRuntimeClasspath
+tools.jackson:jackson-bom:3.0.2=compileClasspath,postgresqlIntegrationTestCompileClasspath,postgresqlIntegrationTestRuntimeClasspath,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
 empty=

src/adapter/outbound/persistence-jpa/src/main/java/dev/caskeleton/adapter/outbound/persistence/techlog/artifact/JdbcPreviewArtifactAdapter.java

@@ -0,0 +1,91 @@
+package dev.caskeleton.adapter.outbound.persistence.techlog.artifact;
+
+import dev.caskeleton.application.techlog.studio.model.PublicPreviewView;
+import dev.caskeleton.application.techlog.studio.model.RecordKind;
+import dev.caskeleton.application.techlog.studio.port.out.PreviewArtifactPort;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Timestamp;
+import java.util.Optional;
+import java.util.UUID;
+import org.springframework.jdbc.core.simple.JdbcClient;
+import org.springframework.stereotype.Repository;
+
+/**
+ * {@code studio_preview} 접근.
+ *
+ * <p>{@code render_model}은 렌더러가 만든 계약 모양 그대로를 문자열로 저장하고 그대로 돌려준다 — 중간에서 파싱했다 다시 직렬화하면 사용자가 확인한 화면과
+ * 저장된 화면이 미묘하게 달라질 수 있고, 게시 시점에 그대로 snapshot 으로 옮겨야 하는 값이라 그 차이가 공개 결과까지 간다.
+ */
+@Repository
+public class JdbcPreviewArtifactAdapter implements PreviewArtifactPort {
+
+  private final JdbcClient jdbcClient;
+
+  public JdbcPreviewArtifactAdapter(JdbcClient jdbcClient) {
+    this.jdbcClient = jdbcClient;
+  }
+
+  @Override
+  public Optional<PublicPreviewView> latestFor(RecordKind kind, UUID documentId) {
+    return jdbcClient
+        .sql(
+            selectColumns()
+                + " WHERE source_kind = :kind AND source_id = :id"
+                + " ORDER BY created_at DESC LIMIT 1")
+        .param("kind", kind.name())
+        .param("id", documentId)
+        .query(JdbcPreviewArtifactAdapter::mapRow)
+        .optional();
+  }
+
+  @Override
+  public Optional<PublicPreviewView> findById(UUID previewId) {
+    return jdbcClient
+        .sql(selectColumns() + " WHERE preview_id = :id")
+        .param("id", previewId)
+        .query(JdbcPreviewArtifactAdapter::mapRow)
+        .optional();
+  }
+
+  @Override
+  public PublicPreviewView save(RecordKind kind, PublicPreviewView preview, String principal) {
+    jdbcClient
+        .sql(
+            "INSERT INTO studio_preview (preview_id, source_kind, source_id, source_version,"
+                + " validation_id, dependency_revision, render_model, created_at, expires_at,"
+                + " created_by)"
+                + " VALUES (:previewId, :kind, :sourceId, :sourceVersion, :validationId,"
+                + " :dependencyRevision, CAST(:renderModel AS jsonb), :createdAt, :expiresAt,"
+                + " :principal)")
+        .param("previewId", preview.previewId())
+        .param("kind", kind.name())
+        .param("sourceId", preview.documentId())
+        .param("sourceVersion", preview.previewVersion())
+        .param("validationId", preview.validationId())
+        .param("dependencyRevision", preview.dependencyRevision())
+        .param("renderModel", preview.renderModelJson())
+        .param("createdAt", Timestamp.from(preview.createdAt()))
+        .param("expiresAt", Timestamp.from(preview.expiresAt()))
+        .param("principal", principal)
+        .update();
+    return preview;
+  }
+
+  private static String selectColumns() {
+    return "SELECT preview_id, source_id, source_version, validation_id, dependency_revision,"
+        + " render_model, created_at, expires_at FROM studio_preview";
+  }
+
+  private static PublicPreviewView mapRow(ResultSet rs, int rowNum) throws SQLException {
+    return new PublicPreviewView(
+        rs.getObject("preview_id", UUID.class),
+        rs.getObject("source_id", UUID.class),
+        rs.getLong("source_version"),
+        rs.getObject("validation_id", UUID.class),
+        rs.getString("dependency_revision"),
+        rs.getTimestamp("created_at").toInstant(),
+        rs.getTimestamp("expires_at").toInstant(),
+        rs.getString("render_model"));
+  }
+}

src/adapter/outbound/persistence-jpa/src/main/java/dev/caskeleton/adapter/outbound/persistence/techlog/artifact/JdbcValidationArtifactAdapter.java

@@ -0,0 +1,143 @@
+package dev.caskeleton.adapter.outbound.persistence.techlog.artifact;
+
+import dev.caskeleton.application.techlog.studio.model.RecordKind;
+import dev.caskeleton.application.techlog.studio.model.ValidationIssueView;
+import dev.caskeleton.application.techlog.studio.model.ValidationReportView;
+import dev.caskeleton.application.techlog.studio.model.ValidationSeverity;
+import dev.caskeleton.application.techlog.studio.model.ValidationStatus;
+import dev.caskeleton.application.techlog.studio.port.out.ValidationArtifactPort;
+import dev.caskeleton.shared.error.MappingException;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Timestamp;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+import org.springframework.jdbc.core.simple.JdbcClient;
+import org.springframework.stereotype.Repository;
+import tools.jackson.core.JacksonException;
+import tools.jackson.databind.JsonNode;
+import tools.jackson.databind.ObjectMapper;
+import tools.jackson.databind.node.ArrayNode;
+import tools.jackson.databind.node.ObjectNode;
+
+/**
+ * {@code studio_validation} 접근. 검증 결과는 일급 artifact이며 실행 후 버리지 않는다(spec §7.3).
+ *
+ * <p>{@code studio_validation}에는 UPDATE가 없다. 재검증은 새 행이며, 이전 결과는 "그때 이 버전은 이런 상태였다"는 사실로 남는다 — 덮어쓰면
+ * 게시 시점에 어떤 근거로 통과했는지 되짚을 수 없다.
+ */
+@Repository
+public class JdbcValidationArtifactAdapter implements ValidationArtifactPort {
+
+  private final JdbcClient jdbcClient;
+  private final ObjectMapper objectMapper;
+
+  public JdbcValidationArtifactAdapter(JdbcClient jdbcClient, ObjectMapper objectMapper) {
+    this.jdbcClient = jdbcClient;
+    this.objectMapper = objectMapper;
+  }
+
+  @Override
+  public Optional<ValidationReportView> latestFor(RecordKind kind, UUID documentId) {
+    return jdbcClient
+        .sql(
+            selectColumns()
+                + " WHERE source_kind = :kind AND source_id = :id"
+                + " ORDER BY validated_at DESC LIMIT 1")
+        .param("kind", kind.name())
+        .param("id", documentId)
+        .query(this::mapRow)
+        .optional();
+  }
+
+  @Override
+  public Optional<ValidationReportView> findById(UUID validationId) {
+    return jdbcClient
+        .sql(selectColumns() + " WHERE validation_id = :id")
+        .param("id", validationId)
+        .query(this::mapRow)
+        .optional();
+  }
+
+  @Override
+  public ValidationReportView save(RecordKind kind, ValidationReportView report, String principal) {
+    jdbcClient
+        .sql(
+            "INSERT INTO studio_validation (validation_id, source_kind, source_id,"
+                + " validated_version, status, issues, dependency_revision, validated_at,"
+                + " valid_until, created_by)"
+                + " VALUES (:validationId, :kind, :sourceId, :validatedVersion, :status,"
+                + " CAST(:issues AS jsonb), :dependencyRevision, :validatedAt, :validUntil,"
+                + " :principal)")
+        .param("validationId", report.validationId())
+        .param("kind", kind.name())
+        .param("sourceId", report.documentId())
+        .param("validatedVersion", report.validatedVersion())
+        .param("status", report.status().name())
+        .param("issues", issuesToJson(report.issues()))
+        .param("dependencyRevision", report.dependencyRevision())
+        .param("validatedAt", Timestamp.from(report.validatedAt()))
+        .param("validUntil", Timestamp.from(report.validUntil()))
+        .param("principal", principal)
+        .update();
+    return report;
+  }
+
+  private static String selectColumns() {
+    return "SELECT validation_id, source_id, validated_version, status, issues,"
+        + " dependency_revision, validated_at, valid_until FROM studio_validation";
+  }
+
+  private ValidationReportView mapRow(ResultSet rs, int rowNum) throws SQLException {
+    return new ValidationReportView(
+        rs.getObject("validation_id", UUID.class),
+        rs.getObject("source_id", UUID.class),
+        rs.getLong("validated_version"),
+        ValidationStatus.valueOf(rs.getString("status")),
+        issuesFromJson(rs.getString("issues")),
+        rs.getTimestamp("validated_at").toInstant(),
+        rs.getTimestamp("valid_until").toInstant(),
+        rs.getString("dependency_revision"));
+  }
+
+  private String issuesToJson(List<ValidationIssueView> issues) {
+    ArrayNode array = objectMapper.createArrayNode();
+    for (ValidationIssueView issue : issues) {
+      ObjectNode node = array.addObject();
+      node.put("code", issue.code());
+      node.put("severity", issue.severity().name());
+      node.put("path", issue.path());
+      node.put("message", issue.message());
+    }
+    try {
+      return objectMapper.writeValueAsString(array);
+    } catch (JacksonException e) {
+      throw new MappingException("failed to serialise validation issues", e);
+    }
+  }
+
+  private List<ValidationIssueView> issuesFromJson(String json) {
+    if (json == null || json.isBlank()) {
+      return List.of();
+    }
+    try {
+      JsonNode array = objectMapper.readTree(json);
+      if (!array.isArray()) {
+        return List.of();
+      }
+      return array
+          .valueStream()
+          .map(
+              node ->
+                  new ValidationIssueView(
+                      node.path("code").asString(""),
+                      ValidationSeverity.valueOf(node.path("severity").asString("ERROR")),
+                      node.path("path").asString(""),
+                      node.path("message").asString("")))
+          .toList();
+    } catch (JacksonException e) {
+      throw new MappingException("failed to read validation issues", e);
+    }
+  }
+}

src/adapter/outbound/persistence-jpa/src/main/java/dev/caskeleton/adapter/outbound/persistence/techlog/query/JdbcDependencyRevisionAdapter.java

@@ -0,0 +1,41 @@
+package dev.caskeleton.adapter.outbound.persistence.techlog.query;
+
+import dev.caskeleton.application.techlog.error.StudioError;
+import dev.caskeleton.application.techlog.error.StudioException;
+import dev.caskeleton.application.techlog.studio.model.RecordKind;
+import dev.caskeleton.application.techlog.studio.port.out.DependencyRevisionPort;
+import java.util.UUID;
+import org.springframework.jdbc.core.simple.JdbcClient;
+import org.springframework.stereotype.Repository;
+
+/**
+ * 의존 상태 해시를 {@link StudioDocumentSql}의 정의로 계산한다.
+ *
+ * <p>목록이 쓰는 SQL과 <b>같은 식</b>을 쓴다. 여기서 다른 식을 쓰면 상세 화면이 계산한 값과 목록이 계산한 값이 달라져, 검증을 막 통과한 문서가 목록에서는
+ * "다시 검증하라"로 보인다.
+ */
+@Repository
+public class JdbcDependencyRevisionAdapter implements DependencyRevisionPort {
+
+  private final JdbcClient jdbcClient;
+
+  public JdbcDependencyRevisionAdapter(JdbcClient jdbcClient) {
+    this.jdbcClient = jdbcClient;
+  }
+
+  @Override
+  public String revisionFor(RecordKind kind, UUID documentId) {
+    return jdbcClient
+        .sql(
+            StudioDocumentSql.documentProjectionCte()
+                + " SELECT dependency_revision FROM studio_document WHERE id = :id")
+        .param("id", documentId)
+        .query(String.class)
+        .optional()
+        .orElseThrow(
+            () ->
+                StudioException.of(
+                    StudioError.DOCUMENT_NOT_FOUND,
+                    "cannot compute a dependency revision for unknown document " + documentId));
+  }
+}

src/adapter/outbound/persistence-jpa/src/main/java/dev/caskeleton/adapter/outbound/persistence/techlog/query/JdbcPublicationQueryAdapter.java

@@ -0,0 +1,42 @@
+package dev.caskeleton.adapter.outbound.persistence.techlog.query;
+
+import dev.caskeleton.application.techlog.studio.model.PublicationAggregateStatus;
+import dev.caskeleton.application.techlog.studio.model.PublicationAggregateView;
+import dev.caskeleton.application.techlog.studio.port.out.PublicationQueryPort;
+import java.util.Optional;
+import java.util.UUID;
+import org.springframework.jdbc.core.simple.JdbcClient;
+import org.springframework.stereotype.Repository;
+
+/** 현재 게시 상태 조회. {@code publication}은 (source_kind, source_id)당 한 행이다. */
+@Repository
+public class JdbcPublicationQueryAdapter implements PublicationQueryPort {
+
+  private final JdbcClient jdbcClient;
+
+  public JdbcPublicationQueryAdapter(JdbcClient jdbcClient) {
+    this.jdbcClient = jdbcClient;
+  }
+
+  @Override
+  public Optional<PublicationAggregateView> currentFor(UUID documentId) {
+    return jdbcClient
+        .sql(
+            "SELECT publication_id, source_id, status, published_version, publication_revision,"
+                + " latest_event_id, public_path, updated_at"
+                + " FROM publication WHERE source_id = :id")
+        .param("id", documentId)
+        .query(
+            (rs, rowNum) ->
+                new PublicationAggregateView(
+                    rs.getObject("publication_id", UUID.class),
+                    rs.getObject("source_id", UUID.class),
+                    PublicationAggregateStatus.valueOf(rs.getString("status")),
+                    rs.getLong("published_version"),
+                    rs.getLong("publication_revision"),
+                    rs.getObject("latest_event_id", UUID.class),
+                    rs.getString("public_path"),
+                    rs.getTimestamp("updated_at").toInstant()))
+        .optional();
+  }
+}

src/adapter/outbound/persistence-jpa/src/main/java/dev/caskeleton/adapter/outbound/persistence/techlog/query/JdbcStudioDashboardQueryAdapter.java

@@ -0,0 +1,57 @@
+package dev.caskeleton.adapter.outbound.persistence.techlog.query;
+
+import dev.caskeleton.application.techlog.studio.model.DashboardTotalsView;
+import dev.caskeleton.application.techlog.studio.model.DocumentSummaryView;
+import dev.caskeleton.application.techlog.studio.model.NextAction;
+import dev.caskeleton.application.techlog.studio.port.out.StudioDashboardQueryPort;
+import java.util.List;
+import org.springframework.jdbc.core.simple.JdbcClient;
+import org.springframework.stereotype.Repository;
+
+/**
+ * 대시보드 집계. 목록과 <b>같은</b> {@code studio_document} 정의를 쓴다 — 대시보드가 "게시 준비됨"이라고 센 문서와 목록에서 그 필터로 나오는
+ * 문서가 달라지면 숫자를 믿을 수 없다.
+ */
+@Repository
+public class JdbcStudioDashboardQueryAdapter implements StudioDashboardQueryPort {
+
+  private final JdbcClient jdbcClient;
+
+  public JdbcStudioDashboardQueryAdapter(JdbcClient jdbcClient) {
+    this.jdbcClient = jdbcClient;
+  }
+
+  @Override
+  public List<DocumentSummaryView> topByNextAction(List<NextAction> actions, int limit) {
+    return jdbcClient
+        .sql(
+            StudioDocumentSql.documentProjectionCte()
+                + " SELECT * FROM studio_document WHERE next_action IN (:actions)"
+                + " ORDER BY updated_at DESC, id DESC LIMIT :limit")
+        .param("actions", actions.stream().map(Enum::name).toList())
+        .param("limit", limit)
+        .query((rs, rowNum) -> StudioDocumentRowMapper.read(rs))
+        .list();
+  }
+
+  @Override
+  public DashboardTotalsView totals() {
+    return jdbcClient
+        .sql(
+            StudioDocumentSql.documentProjectionCte()
+                + " SELECT count(*) AS documents,"
+                + " count(*) FILTER (WHERE next_action IN ('VALIDATE', 'FIX_VALIDATION'))"
+                + "   AS needs_validation,"
+                + " count(*) FILTER (WHERE next_action = 'PUBLISH') AS ready_to_publish,"
+                + " (SELECT count(*) FROM publication WHERE status = 'PUBLISHED') AS publications"
+                + " FROM studio_document")
+        .query(
+            (rs, rowNum) ->
+                new DashboardTotalsView(
+                    rs.getInt("documents"),
+                    rs.getInt("needs_validation"),
+                    rs.getInt("ready_to_publish"),
+                    rs.getInt("publications")))
+        .single();
+  }
+}

src/adapter/outbound/persistence-jpa/src/main/java/dev/caskeleton/adapter/outbound/persistence/techlog/query/JdbcStudioDependencyResolverAdapter.java

@@ -0,0 +1,225 @@
+package dev.caskeleton.adapter.outbound.persistence.techlog.query;
+
+import dev.caskeleton.application.techlog.studio.model.DisplayTargetView;
+import dev.caskeleton.application.techlog.studio.model.PublicPaths;
+import dev.caskeleton.application.techlog.studio.model.RecordKind;
+import dev.caskeleton.application.techlog.studio.model.RelationView;
+import dev.caskeleton.application.techlog.studio.model.ResolvedAssetView;
+import dev.caskeleton.application.techlog.studio.model.ResolvedRelationView;
+import dev.caskeleton.application.techlog.studio.model.WorkingCopyView;
+import dev.caskeleton.application.techlog.studio.port.out.StudioDependencyResolverPort;
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.UUID;
+import org.springframework.jdbc.core.simple.JdbcClient;
+import org.springframework.stereotype.Repository;
+
+/** 편집본이 의존하는 바깥 상태를 한 번에 읽는다. 검증과 렌더링이 같은 결과를 공유하도록 조회는 이 한 곳에서만 한다. */
+@Repository
+public class JdbcStudioDependencyResolverAdapter implements StudioDependencyResolverPort {
+
+  private final JdbcClient jdbcClient;
+
+  public JdbcStudioDependencyResolverAdapter(JdbcClient jdbcClient) {
+    this.jdbcClient = jdbcClient;
+  }
+
+  @Override
+  public Resolved resolve(WorkingCopyView document, Set<String> referencedAssetKeys) {
+    UUID topicId = document.base().topicId();
+    UUID projectId = document.base().projectId();
+
+    DisplayTargetView topic = topicId == null ? null : findTopic(topicId);
+    DisplayTargetView project = projectId == null ? null : findProject(projectId);
+
+    List<ResolvedRelationView> relations = new ArrayList<>();
+    List<UUID> missingTargets = new ArrayList<>();
+    resolveRelations(document, relations, missingTargets);
+
+    Map<String, ResolvedAssetView> assetsByKey = new LinkedHashMap<>();
+    Map<String, String> assetStatusByKey = new LinkedHashMap<>();
+    resolveAssets(referencedAssetKeys, assetsByKey, assetStatusByKey);
+
+    String projectSlug = projectId == null ? null : findProjectSlug(projectId);
+    String publicPath = PublicPaths.forKind(document.kind(), document.base().slug(), projectSlug);
+
+    return new Resolved(
+        topic,
+        topicId != null && topic == null,
+        project,
+        projectId != null && project == null,
+        relations,
+        missingTargets,
+        assetsByKey,
+        assetStatusByKey,
+        resolveEvidenceTarget(document),
+        publicPath,
+        findSlugOwner(document));
+  }
+
+  private DisplayTargetView findTopic(UUID topicId) {
+    return jdbcClient
+        .sql("SELECT id, name, slug FROM topic WHERE id = :id")
+        .param("id", topicId)
+        .query(
+            (rs, rowNum) ->
+                new DisplayTargetView(
+                    rs.getObject("id", UUID.class),
+                    rs.getString("name"),
+                    "/topics/" + rs.getString("slug")))
+        .optional()
+        .orElse(null);
+  }
+
+  private DisplayTargetView findProject(UUID projectId) {
+    return jdbcClient
+        .sql("SELECT id, name, slug FROM project WHERE id = :id")
+        .param("id", projectId)
+        .query(
+            (rs, rowNum) ->
+                new DisplayTargetView(
+                    rs.getObject("id", UUID.class),
+                    rs.getString("name"),
+                    rs.getString("slug") == null ? null : "/projects/" + rs.getString("slug")))
+        .optional()
+        .orElse(null);
+  }
+
+  private String findProjectSlug(UUID projectId) {
+    return jdbcClient
+        .sql("SELECT slug FROM project WHERE id = :id")
+        .param("id", projectId)
+        .query(String.class)
+        .optional()
+        .orElse(null);
+  }
+
+  /**
+   * 관계 대상은 네 유형 어디에도 있을 수 있고 프로젝트일 수도 있다(계약 {@code ResolvedRelation.targetKind} 가 {@code
+   * RecordKind} 보다 하나 넓다). UNION 으로 한 번에 찾는다.
+   */
+  private void resolveRelations(
+      WorkingCopyView document, List<ResolvedRelationView> resolved, List<UUID> missing) {
+
+    for (RelationView relation : document.base().relations()) {
+      if (relation.targetId() == null) {
+        continue;
+      }
+      TargetRow row = findTarget(relation.targetId());
+      if (row == null) {
+        missing.add(relation.targetId());
+        continue;
+      }
+      resolved.add(
+          new ResolvedRelationView(
+              relation.id(),
+              relation.targetId(),
+              row.kind(),
+              row.title(),
+              row.publicPath(),
+              relation.reason() == null ? "" : relation.reason(),
+              relation.order()));
+    }
+  }
+
+  private record TargetRow(String kind, String title, String publicPath) {}
+
+  private TargetRow findTarget(UUID targetId) {
+    return jdbcClient
+        .sql(
+            "SELECT document_type AS kind, title, slug, NULL::text AS project_slug FROM document"
+                + " WHERE id = :id"
+                + " UNION ALL SELECT 'QUESTION', question, slug, NULL::text FROM open_question"
+                + " WHERE id = :id"
+                + " UNION ALL SELECT 'PROJECT', name, slug, NULL::text FROM project"
+                + " WHERE id = :id"
+                + " UNION ALL SELECT 'PROJECT_DECISION', pd.title, pd.slug, p.slug"
+                + " FROM project_decision pd LEFT JOIN project p ON p.id = pd.project_id"
+                + " WHERE pd.id = :id")
+        .param("id", targetId)
+        .query(
+            (rs, rowNum) -> {
+              String kind = rs.getString("kind");
+              String slug = rs.getString("slug");
+              String publicPath =
+                  "PROJECT".equals(kind)
+                      ? (slug == null ? null : "/projects/" + slug)
+                      : PublicPaths.forKind(
+                          RecordKind.valueOf(kind), slug, rs.getString("project_slug"));
+              return new TargetRow(kind, rs.getString("title"), publicPath);
+            })
+        .optional()
+        .orElse(null);
+  }
+
+  private void resolveAssets(
+      Set<String> keys, Map<String, ResolvedAssetView> assets, Map<String, String> statuses) {
+    if (keys.isEmpty()) {
+      return;
+    }
+    jdbcClient
+        .sql(
+            "SELECT id, asset_key, content_type, object_key, width, height, decorative,"
+                + " management_status FROM asset WHERE asset_key IN (:keys)")
+        .param("keys", keys)
+        .query(
+            (rs, rowNum) -> {
+              String key = rs.getString("asset_key");
+              statuses.put(key, rs.getString("management_status"));
+              assets.put(
+                  key,
+                  new ResolvedAssetView(
+                      rs.getObject("id", UUID.class),
+                      key,
+                      rs.getString("content_type"),
+                      // 본문에는 object storage 경로가 아니라 안정적인 전송 경로를 싣는다
+                      // (설계 05장 §3.1).
+                      "/media/" + rs.getString("id"),
+                      (Integer) rs.getObject("width"),
+                      (Integer) rs.getObject("height"),
+                      rs.getBoolean("decorative")));
+              return key;
+            })
+        .list();
+  }
+
+  private DisplayTargetView resolveEvidenceTarget(WorkingCopyView document) {
+    if (!(document instanceof WorkingCopyView.QuestionWorkingCopyView value)
+        || value.resolution() == null
+        || value.resolution().evidenceTargetId() == null) {
+      return null;
+    }
+    TargetRow row = findTarget(value.resolution().evidenceTargetId());
+    return row == null
+        ? null
+        : new DisplayTargetView(
+            value.resolution().evidenceTargetId(), row.title(), row.publicPath());
+  }
+
+  /**
+   * 같은 공개 경로 이름공간(= 같은 유형)에서 이 slug 를 이미 쓰는 다른 기록. 유형이 다르면 경로 접두사가 달라 충돌하지 않는다({@code /cases/x} 와
+   * {@code /questions/x} 는 다른 주소다).
+   */
+  private UUID findSlugOwner(WorkingCopyView document) {
+    String slug = document.base().slug();
+    if (slug == null || slug.isBlank()) {
+      return null;
+    }
+    String sql =
+        switch (document.kind()) {
+          case CASE, REFERENCE ->
+              "SELECT id FROM document WHERE slug = :slug AND document_type = :kind AND id <> :id";
+          case QUESTION -> "SELECT id FROM open_question WHERE slug = :slug AND id <> :id";
+          case PROJECT_DECISION ->
+              "SELECT id FROM project_decision WHERE slug = :slug AND id <> :id";
+        };
+    var spec = jdbcClient.sql(sql).param("slug", slug).param("id", document.id());
+    if (document.kind() == RecordKind.CASE || document.kind() == RecordKind.REFERENCE) {
+      spec = spec.param("kind", document.kind().name());
+    }
+    return spec.query(UUID.class).optional().orElse(null);
+  }
+}

src/adapter/outbound/persistence-jpa/src/main/java/dev/caskeleton/adapter/outbound/persistence/techlog/query/JdbcStudioDocumentQueryAdapter.java

@@ -0,0 +1,141 @@
+package dev.caskeleton.adapter.outbound.persistence.techlog.query;
+
+import dev.caskeleton.application.techlog.studio.model.DocumentPageView;
+import dev.caskeleton.application.techlog.studio.model.DocumentSort;
+import dev.caskeleton.application.techlog.studio.model.DocumentSummaryView;
+import dev.caskeleton.application.techlog.studio.port.out.StudioDocumentQueryPort;
+import dev.caskeleton.application.techlog.studio.query.DocumentCursorPosition;
+import dev.caskeleton.application.techlog.studio.query.ListDocumentsQuery;
+import java.sql.Timestamp;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import org.springframework.jdbc.core.simple.JdbcClient;
+import org.springframework.stereotype.Repository;
+
+/**
+ * {@code listStudioDocuments}. 네 유형이 서로 다른 테이블에 살기 때문에 공통 repository 대신 union projection을 돌린다(계약
+ * 설명, spec §8.3).
+ *
+ * <p>정렬 키에 항상 {@code id}를 붙인다. {@code updated_at}만으로 자르면 같은 시각의 행들이 페이지 경계에서 중복되거나 누락된다 — 대량 저장 직후에
+ * 실제로 일어나는 일이다.
+ */
+@Repository
+public class JdbcStudioDocumentQueryAdapter implements StudioDocumentQueryPort {
+
+  private final JdbcClient jdbcClient;
+
+  public JdbcStudioDocumentQueryAdapter(JdbcClient jdbcClient) {
+    this.jdbcClient = jdbcClient;
+  }
+
+  @Override
+  public DocumentPageView list(ListDocumentsQuery query) {
+    StringBuilder sql = new StringBuilder(StudioDocumentSql.documentProjectionCte());
+    sql.append(" SELECT * FROM studio_document WHERE 1 = 1");
+    Map<String, Object> params = new java.util.HashMap<>();
+
+    if (query.kind() != null) {
+      sql.append(" AND kind = :kind");
+      params.put("kind", query.kind().name());
+    }
+    if (query.projectId() != null) {
+      sql.append(" AND project_id = :projectId");
+      params.put("projectId", query.projectId());
+    }
+    if (query.nextAction() != null) {
+      sql.append(" AND next_action = :nextAction");
+      params.put("nextAction", query.nextAction().name());
+    }
+    if (query.publicationStatus() != null) {
+      sql.append(publicationStatusPredicate());
+      params.put("publicationStatus", query.publicationStatus().name());
+    }
+    if (query.query() != null && !query.query().isBlank()) {
+      sql.append(" AND lower(title) LIKE :titlePattern");
+      params.put("titlePattern", "%" + query.query().toLowerCase(Locale.ROOT) + "%");
+    }
+    appendCursorPredicate(sql, params, query);
+    sql.append(orderBy(query.sort()));
+    // limit + 1 을 읽어 "다음 쪽이 있는가"를 별도 count 없이 판정한다.
+    sql.append(" LIMIT :limitPlusOne");
+    params.put("limitPlusOne", query.limit() + 1);
+
+    var spec = jdbcClient.sql(sql.toString());
+    for (Map.Entry<String, Object> param : params.entrySet()) {
+      spec = spec.param(param.getKey(), param.getValue());
+    }
+
+    List<Row> rows = spec.query((rs, rowNum) -> readRow(rs)).list();
+    boolean hasMore = rows.size() > query.limit();
+    List<Row> page = hasMore ? rows.subList(0, query.limit()) : rows;
+
+    List<DocumentSummaryView> items = new ArrayList<>(page.size());
+    for (Row row : page) {
+      items.add(row.summary());
+    }
+    return new DocumentPageView(
+        items, hasMore ? cursorPayload(page.getLast(), query.sort()) : null);
+  }
+
+  /**
+   * 게시 이력이 없는 문서는 {@code publication} 행 자체가 없다 — {@code NEVER_PUBLISHED}는 "행이 없음"이지 특정 status 값이
+   * 아니다.
+   */
+  private static String publicationStatusPredicate() {
+    return " AND ((:publicationStatus = 'NEVER_PUBLISHED' AND publication_status IS NULL)"
+        + " OR publication_status = :publicationStatus)";
+  }
+
+  private static String orderBy(DocumentSort sort) {
+    return switch (sort) {
+      case UPDATED_DESC -> " ORDER BY updated_at DESC, id DESC";
+      case UPDATED_ASC -> " ORDER BY updated_at ASC, id ASC";
+      case TITLE_ASC -> " ORDER BY title ASC, id ASC";
+    };
+  }
+
+  private static void appendCursorPredicate(
+      StringBuilder sql, Map<String, Object> params, ListDocumentsQuery query) {
+    DocumentCursorPosition position = query.position();
+    if (position == null) {
+      return;
+    }
+    // switch 문이 아니라 식이다 — 열거 전부를 다루면 default 가 필요 없고, 정렬이 늘면 컴파일러가
+    // 여기서 막아 준다(문이면 커서 조건 없이 조용히 첫 페이지를 다시 준다).
+    String predicate =
+        switch (query.sort()) {
+          case UPDATED_DESC -> {
+            params.put("cursorUpdatedAt", Timestamp.from(position.updatedAt()));
+            yield " AND (updated_at, id) < (:cursorUpdatedAt, :cursorId)";
+          }
+          case UPDATED_ASC -> {
+            params.put("cursorUpdatedAt", Timestamp.from(position.updatedAt()));
+            yield " AND (updated_at, id) > (:cursorUpdatedAt, :cursorId)";
+          }
+          case TITLE_ASC -> {
+            params.put("cursorTitle", position.title());
+            yield " AND (title, id) > (:cursorTitle, :cursorId)";
+          }
+        };
+    params.put("cursorId", position.id());
+    sql.append(predicate);
+  }
+
+  /** 다음 쪽의 시작 위치. web 계층이 이 값을 서명해 opaque cursor 로 만든다. */
+  private static String cursorPayload(Row last, DocumentSort sort) {
+    return switch (sort) {
+      case UPDATED_DESC, UPDATED_ASC -> last.updatedAt().toInstant() + "|" + last.summary().id();
+      case TITLE_ASC -> last.title() + "|" + last.summary().id();
+    };
+  }
+
+  /** 커서 계산에 필요한 정렬 키만 요약과 함께 들고 다닌다. */
+  private record Row(DocumentSummaryView summary, java.sql.Timestamp updatedAt, String title) {}
+
+  private static Row readRow(java.sql.ResultSet rs) throws java.sql.SQLException {
+    return new Row(
+        StudioDocumentRowMapper.read(rs), rs.getTimestamp("updated_at"), rs.getString("title"));
+  }
+}

src/adapter/outbound/persistence-jpa/src/main/java/dev/caskeleton/adapter/outbound/persistence/techlog/query/StudioDocumentRowMapper.java

@@ -0,0 +1,48 @@
+package dev.caskeleton.adapter.outbound.persistence.techlog.query;
+
+import dev.caskeleton.application.techlog.studio.model.DisplayTargetView;
+import dev.caskeleton.application.techlog.studio.model.DocumentSummaryView;
+import dev.caskeleton.application.techlog.studio.model.NextAction;
+import dev.caskeleton.application.techlog.studio.model.PublicationStatusView;
+import dev.caskeleton.application.techlog.studio.model.RecordKind;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.UUID;
+
+/**
+ * {@code studio_document} 한 행 → 계약 {@code DocumentSummary}.
+ *
+ * <p>목록·대시보드·게시 이력이 모두 이 매퍼를 쓴다. 화면마다 따로 만들면 같은 문서가 화면마다 다른 {@code nextAction} 이나 {@code
+ * hasUnpublishedChanges} 로 보인다.
+ */
+public final class StudioDocumentRowMapper {
+
+  private StudioDocumentRowMapper() {}
+
+  public static DocumentSummaryView read(ResultSet rs) throws SQLException {
+    UUID projectId = rs.getObject("project_id", UUID.class);
+    String projectSlug = rs.getString("project_slug");
+    Long publishedVersion = (Long) rs.getObject("published_version");
+    long version = rs.getLong("version");
+    String publicationStatus = rs.getString("publication_status");
+
+    return new DocumentSummaryView(
+        rs.getObject("id", UUID.class),
+        rs.getString("title"),
+        RecordKind.valueOf(rs.getString("kind")),
+        projectId == null
+            ? null
+            : new DisplayTargetView(
+                projectId,
+                rs.getString("project_name"),
+                projectSlug == null ? null : "/projects/" + projectSlug),
+        rs.getTimestamp("updated_at").toInstant(),
+        publicationStatus == null
+            ? PublicationStatusView.NEVER_PUBLISHED
+            : PublicationStatusView.valueOf(publicationStatus),
+        publishedVersion,
+        // 계약: "게시 취소 상태에서도 과거 publishedVersion 과 비교한다."
+        publishedVersion != null && publishedVersion != version,
+        NextAction.valueOf(rs.getString("next_action")));
+  }
+}

src/adapter/outbound/persistence-jpa/src/main/java/dev/caskeleton/adapter/outbound/persistence/techlog/query/StudioDocumentSql.java

@@ -0,0 +1,130 @@
+package dev.caskeleton.adapter.outbound.persistence.techlog.query;
+
+/**
+ * Studio 문서 union projection의 SQL 정의. 목록·대시보드·단건 조회가 <b>같은</b> 정의를 쓴다.
+ *
+ * <p>{@code dependencyRevision}과 {@code nextAction}은 저장하지 않고 계산하는 값이다(spec §6.3, §7.3). 계산식이 SQL 한
+ * 곳과 Java 한 곳에 따로 있으면 목록의 {@code nextAction}과 상세의 {@code nextAction}이 조용히 갈라진다 — 사용자에게는 "목록에서는
+ * 게시하라더니 열어 보니 검증하라"는 모순으로 보인다. 그래서 계산은 여기 SQL 한 벌만 둔다.
+ */
+public final class StudioDocumentSql {
+
+  /**
+   * 렌더 계약 버전. 렌더 결과의 의미가 바뀌면 올린다 — 올리는 순간 기존 validation/preview가 전부 stale이 되어 다시 검증·미리보기를 거치게 된다.
+   */
+  public static final String RENDERER_CONTRACT_VERSION = "1";
+
+  private StudioDocumentSql() {}
+
+  /**
+   * 네 유형을 하나의 행 모양으로 모으고, 그 위에 의존 상태 해시와 최신 artifact를 붙인 CTE 묶음.
+   *
+   * <p>마지막 CTE {@code studio_document}가 최종 결과이며 컬럼은 다음과 같다.
+   *
+   * <pre>{@code
+   * id kind title version updated_at topic_id project_id project_name project_slug
+   * dependency_revision
+   * validation_version validation_status validation_valid_until validation_revision
+   * preview_version preview_expires_at preview_revision
+   * publication_status published_version
+   * next_action
+   * }</pre>
+   */
+  public static String documentProjectionCte() {
+    return """
+        WITH studio_source AS (
+            SELECT d.id,
+                   d.document_type AS kind,
+                   d.title,
+                   d.version,
+                   d.updated_at,
+                   d.primary_topic_id AS topic_id,
+                   (SELECT l.project_id FROM project_document_link l
+                     WHERE l.document_id = d.id AND l.relation_type = 'PRIMARY') AS project_id
+              FROM document d
+            UNION ALL
+            SELECT q.id, 'QUESTION', q.question, q.version, q.updated_at, q.primary_topic_id,
+                   (SELECT l.project_id FROM project_question_link l
+                     WHERE l.question_id = q.id AND l.relation_type = 'PRIMARY')
+              FROM open_question q
+            UNION ALL
+            SELECT pd.id, 'PROJECT_DECISION', pd.title, pd.version, pd.updated_at,
+                   pd.primary_topic_id, pd.project_id
+              FROM project_decision pd
+        ),
+        studio_dependency AS (
+            SELECT s.id,
+                   md5(concat_ws('|',
+                       coalesce(t.id::text || ':' || t.version::text, '-'),
+                       coalesce(p.id::text || ':' || p.version::text, '-'),
+                       coalesce((
+                           SELECT md5(string_agg(rel.sig, ',' ORDER BY rel.sig))
+                             FROM (
+                               SELECT r.target_id::text || ':'
+                                      || coalesce(rd.version, rq.version, rp.version, 0)::text AS sig
+                                 FROM studio_relation r
+                                 LEFT JOIN document rd ON rd.id = r.target_id
+                                 LEFT JOIN open_question rq ON rq.id = r.target_id
+                                 LEFT JOIN project_decision rp ON rp.id = r.target_id
+                                WHERE r.source_kind = s.kind AND r.source_id = s.id
+                             ) rel
+                       ), '-'),
+                       'renderer:%s'
+                   )) AS dependency_revision
+              FROM studio_source s
+              LEFT JOIN topic t ON t.id = s.topic_id
+              LEFT JOIN project p ON p.id = s.project_id
+        ),
+        studio_latest_validation AS (
+            SELECT DISTINCT ON (v.source_id)
+                   v.source_id, v.validation_id, v.validated_version, v.status,
+                   v.valid_until, v.dependency_revision
+              FROM studio_validation v
+             ORDER BY v.source_id, v.validated_at DESC
+        ),
+        studio_latest_preview AS (
+            SELECT DISTINCT ON (pv.source_id)
+                   pv.source_id, pv.preview_id, pv.source_version, pv.expires_at,
+                   pv.dependency_revision
+              FROM studio_preview pv
+             ORDER BY pv.source_id, pv.created_at DESC
+        ),
+        studio_document AS (
+            SELECT s.id, s.kind, s.title, s.version, s.updated_at, s.topic_id, s.project_id,
+                   pr.name AS project_name, pr.slug AS project_slug,
+                   dep.dependency_revision,
+                   val.validated_version AS validation_version,
+                   val.status AS validation_status,
+                   val.valid_until AS validation_valid_until,
+                   val.dependency_revision AS validation_revision,
+                   prev.source_version AS preview_version,
+                   prev.expires_at AS preview_expires_at,
+                   prev.dependency_revision AS preview_revision,
+                   pub.status AS publication_status,
+                   pub.published_version,
+                   CASE
+                     WHEN s.title IS NULL OR btrim(s.title) = '' THEN 'CONTINUE_EDITING'
+                     WHEN val.validated_version IS NULL
+                          OR val.validated_version <> s.version
+                          OR val.dependency_revision IS DISTINCT FROM dep.dependency_revision
+                          OR val.valid_until <= now() THEN 'VALIDATE'
+                     WHEN val.status = 'INVALID' THEN 'FIX_VALIDATION'
+                     WHEN prev.source_version IS NULL
+                          OR prev.source_version <> s.version
+                          OR prev.dependency_revision IS DISTINCT FROM dep.dependency_revision
+                          OR prev.expires_at <= now() THEN 'CREATE_PREVIEW'
+                     WHEN pub.status IS DISTINCT FROM 'PUBLISHED'
+                          OR pub.published_version <> s.version THEN 'PUBLISH'
+                     ELSE 'NONE'
+                   END AS next_action
+              FROM studio_source s
+              JOIN studio_dependency dep ON dep.id = s.id
+              LEFT JOIN project pr ON pr.id = s.project_id
+              LEFT JOIN studio_latest_validation val ON val.source_id = s.id
+              LEFT JOIN studio_latest_preview prev ON prev.source_id = s.id
+              LEFT JOIN publication pub ON pub.source_id = s.id AND pub.source_kind = s.kind
+        )
+        """
+        .formatted(RENDERER_CONTRACT_VERSION);
+  }
+}

src/adapter/outbound/persistence-jpa/src/main/java/dev/caskeleton/adapter/outbound/persistence/techlog/studio/asset/JdbcAssetRepositoryAdapter.java

@@ -0,0 +1,244 @@
+package dev.caskeleton.adapter.outbound.persistence.techlog.studio.asset;
+
+import dev.caskeleton.application.techlog.studio.model.AssetDetailView;
+import dev.caskeleton.application.techlog.studio.model.AssetKindView;
+import dev.caskeleton.application.techlog.studio.model.AssetManagementStatusView;
+import dev.caskeleton.application.techlog.studio.model.AssetPageView;
+import dev.caskeleton.application.techlog.studio.model.AssetUsageView;
+import dev.caskeleton.application.techlog.studio.model.AssetView;
+import dev.caskeleton.application.techlog.studio.model.RecordKind;
+import dev.caskeleton.application.techlog.studio.port.out.AssetRepositoryPort;
+import dev.caskeleton.application.techlog.studio.query.ListAssetsQuery;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Timestamp;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Optional;
+import java.util.UUID;
+import org.springframework.jdbc.core.simple.JdbcClient;
+import org.springframework.stereotype.Repository;
+
+/**
+ * {@code asset} 메타데이터 접근.
+ *
+ * <p>{@code usageCount} 는 {@code asset_reference} 에서 센다 — Asset 행에 캐시해 두면 참조가 바뀔 때마다 두 곳을 맞춰야 하고,
+ * 어긋나면 "쓰이고 있는데 삭제 가능"으로 보인다.
+ */
+@Repository
+public class JdbcAssetRepositoryAdapter implements AssetRepositoryPort {
+
+  private final JdbcClient jdbcClient;
+
+  public JdbcAssetRepositoryAdapter(JdbcClient jdbcClient) {
+    this.jdbcClient = jdbcClient;
+  }
+
+  @Override
+  public AssetPageView list(ListAssetsQuery query) {
+    StringBuilder sql = new StringBuilder(selectColumns() + " WHERE 1 = 1");
+    Map<String, Object> params = new HashMap<>();
+    if (query.kind() != null) {
+      sql.append(" AND a.asset_kind = :kind");
+      params.put("kind", query.kind().name());
+    }
+    if (query.managementStatus() != null) {
+      sql.append(" AND a.management_status = :status");
+      params.put("status", query.managementStatus().name());
+    }
+    if (query.query() != null && !query.query().isBlank()) {
+      sql.append(" AND (lower(a.asset_key) LIKE :pattern OR lower(a.original_name) LIKE :pattern)");
+      params.put("pattern", "%" + query.query().toLowerCase(Locale.ROOT) + "%");
+    }
+    if (query.beforeCreatedAt() != null && query.beforeId() != null) {
+      sql.append(" AND (a.created_at, a.id) < (:before, :beforeId)");
+      params.put("before", Timestamp.from(query.beforeCreatedAt()));
+      params.put("beforeId", query.beforeId());
+    }
+    sql.append(" ORDER BY a.created_at DESC, a.id DESC LIMIT :limitPlusOne");
+    params.put("limitPlusOne", query.limit() + 1);
+
+    var spec = jdbcClient.sql(sql.toString());
+    for (Map.Entry<String, Object> param : params.entrySet()) {
+      spec = spec.param(param.getKey(), param.getValue());
+    }
+    List<AssetView> rows = spec.query(JdbcAssetRepositoryAdapter::mapAsset).list();
+
+    boolean hasMore = rows.size() > query.limit();
+    List<AssetView> page = hasMore ? rows.subList(0, query.limit()) : rows;
+    String nextCursor = hasMore ? page.getLast().createdAt() + "|" + page.getLast().id() : null;
+    return new AssetPageView(page, nextCursor);
+  }
+
+  @Override
+  public Optional<AssetView> find(UUID assetId) {
+    return jdbcClient
+        .sql(selectColumns() + " WHERE a.id = :id")
+        .param("id", assetId)
+        .query(JdbcAssetRepositoryAdapter::mapAsset)
+        .optional();
+  }
+
+  @Override
+  public Optional<AssetDetailView> findDetail(UUID assetId) {
+    return find(assetId)
+        .map(
+            asset -> new AssetDetailView(asset, usagesOf(assetId), hasPublicationHistory(assetId)));
+  }
+
+  @Override
+  public AssetView create(NewAsset asset, String principal) {
+    jdbcClient
+        .sql(
+            "INSERT INTO asset (id, asset_key, asset_kind, management_status, object_key,"
+                + " original_name, display_name, content_type, size_bytes, width, height,"
+                + " checksum_sha256, alt_text, decorative, version, created_by, updated_by)"
+                + " VALUES (:id, :assetKey, :kind, :status, :objectKey, :originalName,"
+                + " :originalName, :contentType, :size, :width, :height, :checksum, :altText,"
+                // 계약의 Asset.version 은 minimum 1 이다. 컬럼 기본값 0 을 그대로 두면 생성 직후
+                // 응답이 계약을 위반하고, 클라이언트가 보내는 expectedVersion 도 맞출 수 없다.
+                + " :decorative, 1, :principal, :principal)")
+        .param("id", asset.id())
+        .param("assetKey", asset.assetKey())
+        .param("kind", asset.kind().name())
+        .param("status", asset.managementStatus().name())
+        .param("objectKey", asset.objectKey())
+        .param("originalName", asset.originalFilename())
+        .param("contentType", asset.mediaType())
+        .param("size", asset.byteSize())
+        .param("width", asset.width())
+        .param("height", asset.height())
+        .param("checksum", asset.checksumSha256())
+        .param("altText", asset.altText())
+        .param("decorative", asset.decorative())
+        .param("principal", principal)
+        .update();
+    return find(asset.id()).orElseThrow();
+  }
+
+  @Override
+  public Optional<AssetView> update(
+      UUID assetId,
+      long expectedVersion,
+      AssetKindView kind,
+      String altText,
+      boolean altTextProvided,
+      Boolean decorative,
+      AssetManagementStatusView managementStatus,
+      String principal) {
+
+    int updated =
+        jdbcClient
+            .sql(
+                "UPDATE asset SET"
+                    // 보내지 않은 필드는 그대로 둔다 — PUT 이지만 계약의 UpdateAssetCommand 는
+                    // expectedVersion 외 전부 optional 이라 부분 갱신 의미다.
+                    + " asset_kind = COALESCE(:kind, asset_kind),"
+                    + " alt_text = CASE WHEN :altTextProvided THEN :altText ELSE alt_text END,"
+                    + " decorative = COALESCE(:decorative, decorative),"
+                    + " management_status = COALESCE(:status, management_status),"
+                    + " version = version + 1, updated_at = now(), updated_by = :principal"
+                    + " WHERE id = :id AND version = :expectedVersion")
+            .param("kind", kind == null ? null : kind.name())
+            .param("altTextProvided", altTextProvided)
+            .param("altText", altText)
+            .param("decorative", decorative)
+            .param("status", managementStatus == null ? null : managementStatus.name())
+            .param("principal", principal)
+            .param("id", assetId)
+            .param("expectedVersion", expectedVersion)
+            .update();
+    return updated == 0 ? Optional.empty() : find(assetId);
+  }
+
+  @Override
+  public Optional<String> findObjectKey(UUID assetId) {
+    return jdbcClient
+        .sql("SELECT object_key FROM asset WHERE id = :id")
+        .param("id", assetId)
+        .query(String.class)
+        .optional();
+  }
+
+  @Override
+  public void delete(UUID assetId) {
+    jdbcClient.sql("DELETE FROM asset WHERE id = :id").param("id", assetId).update();
+  }
+
+  private static String selectColumns() {
+    return "SELECT a.id, a.asset_key, a.asset_kind, a.management_status, a.original_name,"
+        + " a.content_type, a.size_bytes, a.width, a.height, a.alt_text, a.decorative,"
+        + " a.version, a.created_at, a.updated_at, a.first_published_at,"
+        + " (SELECT count(*) FROM asset_reference r WHERE r.asset_id = a.id) AS usage_count"
+        + " FROM asset a";
+  }
+
+  private static AssetView mapAsset(ResultSet rs, int rowNum) throws SQLException {
+    return new AssetView(
+        rs.getObject("id", UUID.class),
+        rs.getString("asset_key"),
+        AssetKindView.valueOf(rs.getString("asset_kind")),
+        rs.getString("content_type"),
+        rs.getString("original_name"),
+        rs.getLong("size_bytes"),
+        (Integer) rs.getObject("width"),
+        (Integer) rs.getObject("height"),
+        rs.getString("alt_text"),
+        rs.getBoolean("decorative"),
+        AssetManagementStatusView.valueOf(rs.getString("management_status")),
+        // 본문에 저장소 경로를 싣지 않는다(설계 05장 §3.1). 안정적인 전송 경로만 노출한다.
+        "/media/" + rs.getString("id"),
+        rs.getInt("usage_count"),
+        rs.getLong("version"),
+        rs.getTimestamp("created_at").toInstant(),
+        rs.getTimestamp("updated_at").toInstant());
+  }
+
+  private List<AssetUsageView> usagesOf(UUID assetId) {
+    return jdbcClient
+        .sql(
+            "SELECT r.owner_id, r.owner_type, r.reference_scope,"
+                + " COALESCE(d.title, q.question, pd.title) AS title,"
+                + " COALESCE(d.document_type, 'QUESTION') AS document_kind"
+                + " FROM asset_reference r"
+                + " LEFT JOIN document d ON d.id = r.owner_id"
+                + " LEFT JOIN open_question q ON q.id = r.owner_id"
+                + " LEFT JOIN project_decision pd ON pd.id = r.owner_id"
+                + " WHERE r.asset_id = :id")
+        .param("id", assetId)
+        .query(
+            (rs, rowNum) ->
+                new AssetUsageView(
+                    rs.getObject("owner_id", UUID.class),
+                    kindOf(rs.getString("owner_type"), rs.getString("document_kind")),
+                    rs.getString("title") == null ? "(제목 없음)" : rs.getString("title"),
+                    "PUBLISHED".equals(rs.getString("reference_scope"))))
+        .list();
+  }
+
+  /** {@code asset_reference.owner_type} 은 {@code RecordKind} 와 이름이 다르다(V7). */
+  private static RecordKind kindOf(String ownerType, String documentKind) {
+    return switch (ownerType) {
+      case "DOCUMENT" -> RecordKind.valueOf(documentKind);
+      case "DECISION" -> RecordKind.PROJECT_DECISION;
+      default -> RecordKind.QUESTION;
+    };
+  }
+
+  /** 한 번이라도 공개된 적이 있으면 hard delete 를 금지한다(계약 {@code AssetDetail} 설명). */
+  private boolean hasPublicationHistory(UUID assetId) {
+    return Boolean.TRUE.equals(
+        jdbcClient
+            .sql(
+                "SELECT (first_published_at IS NOT NULL"
+                    + " OR EXISTS (SELECT 1 FROM asset_reference r"
+                    + "            WHERE r.asset_id = :id AND r.reference_scope = 'PUBLISHED'))"
+                    + " FROM asset WHERE id = :id")
+            .param("id", assetId)
+            .query(Boolean.class)
+            .optional()
+            .orElse(Boolean.FALSE));
+  }
+}

src/adapter/outbound/persistence-jpa/src/main/java/dev/caskeleton/adapter/outbound/persistence/techlog/studio/publication/JdbcPublicationHistoryQueryAdapter.java

@@ -0,0 +1,192 @@
+package dev.caskeleton.adapter.outbound.persistence.techlog.studio.publication;
+
+import dev.caskeleton.adapter.outbound.persistence.techlog.query.StudioDocumentRowMapper;
+import dev.caskeleton.adapter.outbound.persistence.techlog.query.StudioDocumentSql;
+import dev.caskeleton.application.techlog.studio.model.DocumentSummaryView;
+import dev.caskeleton.application.techlog.studio.model.PublicationActionView;
+import dev.caskeleton.application.techlog.studio.model.PublicationAggregateStatus;
+import dev.caskeleton.application.techlog.studio.model.PublicationAggregateView;
+import dev.caskeleton.application.techlog.studio.model.PublicationEventTypeView;
+import dev.caskeleton.application.techlog.studio.model.PublicationEventView;
+import dev.caskeleton.application.techlog.studio.model.PublicationListItemView;
+import dev.caskeleton.application.techlog.studio.model.PublicationPageView;
+import dev.caskeleton.application.techlog.studio.model.PublicationSnapshotView;
+import dev.caskeleton.application.techlog.studio.port.out.PublicationHistoryQueryPort;
+import dev.caskeleton.application.techlog.studio.query.ListPublicationsQuery;
+import java.sql.Timestamp;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.UUID;
+import org.springframework.jdbc.core.simple.JdbcClient;
+import org.springframework.stereotype.Repository;
+
+/**
+ * 게시 이력 조회. 이력은 항상 최신순이며 정렬 선택지가 없다 — 계약에도 정렬 파라미터가 없다.
+ *
+ * <p>목록의 {@code document} 요약은 {@link StudioDocumentSql} 의 같은 정의에서 가져온다. 여기서 따로 만들면 목록 화면과 이력 화면의
+ * {@code nextAction} 이 갈라진다.
+ */
+@Repository
+public class JdbcPublicationHistoryQueryAdapter implements PublicationHistoryQueryPort {
+
+  private final JdbcClient jdbcClient;
+
+  public JdbcPublicationHistoryQueryAdapter(JdbcClient jdbcClient) {
+    this.jdbcClient = jdbcClient;
+  }
+
+  @Override
+  public PublicationPageView list(ListPublicationsQuery query) {
+    StringBuilder sql =
+        new StringBuilder(
+            "SELECT e.publication_event_id, e.publication_id, e.source_id, e.event_type,"
+                + " e.occurred_at, e.published_version, e.source_published_event_id,"
+                + " (s.publication_event_id IS NOT NULL) AS snapshot_available,"
+                + " p.status, p.publication_revision, p.latest_event_id, p.public_path,"
+                + " p.updated_at AS publication_updated_at, p.published_version AS current_version"
+                + " FROM publication_event e"
+                + " JOIN publication p ON p.publication_id = e.publication_id"
+                + " LEFT JOIN publication_snapshot s"
+                + " ON s.publication_event_id = e.publication_event_id"
+                + " WHERE 1 = 1");
+    Map<String, Object> params = new HashMap<>();
+    if (query.type() != null) {
+      sql.append(" AND e.event_type = :type");
+      params.put("type", query.type().name());
+    }
+    if (query.beforeOccurredAt() != null && query.beforeEventId() != null) {
+      sql.append(" AND (e.occurred_at, e.publication_event_id) < (:before, :beforeId)");
+      params.put("before", Timestamp.from(query.beforeOccurredAt()));
+      params.put("beforeId", query.beforeEventId());
+    }
+    sql.append(" ORDER BY e.occurred_at DESC, e.publication_event_id DESC LIMIT :limitPlusOne");
+    params.put("limitPlusOne", query.limit() + 1);
+
+    var spec = jdbcClient.sql(sql.toString());
+    for (Map.Entry<String, Object> param : params.entrySet()) {
+      spec = spec.param(param.getKey(), param.getValue());
+    }
+
+    List<Row> rows = spec.query((rs, rowNum) -> readRow(rs)).list();
+    boolean hasMore = rows.size() > query.limit();
+    List<Row> page = hasMore ? rows.subList(0, query.limit()) : rows;
+
+    Map<UUID, DocumentSummaryView> summaries = summariesFor(page);
+    List<PublicationListItemView> items = new ArrayList<>(page.size());
+    for (Row row : page) {
+      items.add(
+          new PublicationListItemView(
+              row.event(),
+              row.publication(),
+              summaries.get(row.event().documentId()),
+              actionsFor(row)));
+    }
+    String nextCursor =
+        hasMore
+            ? page.getLast().event().occurredAt()
+                + "|"
+                + page.getLast().event().publicationEventId()
+            : null;
+    return new PublicationPageView(items, nextCursor);
+  }
+
+  @Override
+  public Optional<PublicationSnapshotView> findSnapshot(UUID publicationEventId) {
+    return jdbcClient
+        .sql(
+            "SELECT e.publication_event_id, e.publication_id, e.source_id, e.event_type,"
+                + " e.occurred_at, e.published_version, e.source_published_event_id,"
+                + " true AS snapshot_available,"
+                + " s.render_model, s.content_format_version, s.renderer_contract_version"
+                + " FROM publication_snapshot s"
+                + " JOIN publication_event e"
+                + " ON e.publication_event_id = s.publication_event_id"
+                + " WHERE s.publication_event_id = :id")
+        .param("id", publicationEventId)
+        .query(
+            (rs, rowNum) ->
+                new PublicationSnapshotView(
+                    PublicationRowMappers.mapEvent(rs, rowNum),
+                    rs.getString("render_model"),
+                    rs.getString("content_format_version"),
+                    rs.getString("renderer_contract_version")))
+        .optional();
+  }
+
+  @Override
+  public Optional<PublicationAggregateView> findById(UUID publicationId) {
+    return jdbcClient
+        .sql(
+            "SELECT publication_id, source_id, status, published_version, publication_revision,"
+                + " latest_event_id, public_path, updated_at FROM publication"
+                + " WHERE publication_id = :id")
+        .param("id", publicationId)
+        .query(JdbcPublicationWriterAdapter::mapAggregate)
+        .optional();
+  }
+
+  private Map<UUID, DocumentSummaryView> summariesFor(List<Row> rows) {
+    if (rows.isEmpty()) {
+      return Map.of();
+    }
+    List<UUID> ids = rows.stream().map(row -> row.event().documentId()).distinct().toList();
+    Map<UUID, DocumentSummaryView> summaries = new HashMap<>();
+    jdbcClient
+        .sql(
+            StudioDocumentSql.documentProjectionCte()
+                + " SELECT * FROM studio_document WHERE id IN (:ids)")
+        .param("ids", ids)
+        .query((rs, rowNum) -> StudioDocumentRowMapper.read(rs))
+        .list()
+        .forEach(summary -> summaries.put(summary.id(), summary));
+    return summaries;
+  }
+
+  /**
+   * 계약 {@code PublicationListItem.availableActions}. 지금 상태에서 실제로 할 수 있는 것만 담는다 — 화면이 눌러도 실패할 버튼을
+   * 그리지 않게 하려는 값이다.
+   */
+  private static List<PublicationActionView> actionsFor(Row row) {
+    List<PublicationActionView> actions = new ArrayList<>();
+    if (row.event().snapshotAvailable()) {
+      actions.add(PublicationActionView.VIEW_SNAPSHOT);
+    }
+    if (row.event().sourcePublishedEventId() != null) {
+      actions.add(PublicationActionView.VIEW_SOURCE_SNAPSHOT);
+    }
+    if (row.publication().status() == PublicationAggregateStatus.PUBLISHED
+        && row.publication().latestEventId().equals(row.event().publicationEventId())) {
+      actions.add(PublicationActionView.UNPUBLISH);
+    }
+    return actions;
+  }
+
+  private record Row(PublicationEventView event, PublicationAggregateView publication) {}
+
+  private static Row readRow(java.sql.ResultSet rs) throws java.sql.SQLException {
+    PublicationEventView event =
+        new PublicationEventView(
+            rs.getObject("publication_event_id", UUID.class),
+            rs.getObject("publication_id", UUID.class),
+            rs.getObject("source_id", UUID.class),
+            PublicationEventTypeView.valueOf(rs.getString("event_type")),
+            rs.getTimestamp("occurred_at").toInstant(),
+            rs.getLong("published_version"),
+            rs.getObject("source_published_event_id", UUID.class),
+            rs.getBoolean("snapshot_available"));
+    PublicationAggregateView publication =
+        new PublicationAggregateView(
+            rs.getObject("publication_id", UUID.class),
+            rs.getObject("source_id", UUID.class),
+            PublicationAggregateStatus.valueOf(rs.getString("status")),
+            rs.getLong("current_version"),
+            rs.getLong("publication_revision"),
+            rs.getObject("latest_event_id", UUID.class),
+            rs.getString("public_path"),
+            rs.getTimestamp("publication_updated_at").toInstant());
+    return new Row(event, publication);
+  }
+}

src/adapter/outbound/persistence-jpa/src/main/java/dev/caskeleton/adapter/outbound/persistence/techlog/studio/publication/JdbcPublicationWriterAdapter.java

@@ -0,0 +1,514 @@
+package dev.caskeleton.adapter.outbound.persistence.techlog.studio.publication;
+
+import dev.caskeleton.application.techlog.error.StudioError;
+import dev.caskeleton.application.techlog.error.StudioException;
+import dev.caskeleton.application.techlog.studio.model.AssetManifestEntry;
+import dev.caskeleton.application.techlog.studio.model.PublicationAggregateStatus;
+import dev.caskeleton.application.techlog.studio.model.PublicationAggregateView;
+import dev.caskeleton.application.techlog.studio.model.PublicationEventTypeView;
+import dev.caskeleton.application.techlog.studio.model.PublicationEventView;
+import dev.caskeleton.application.techlog.studio.model.PublishResultView;
+import dev.caskeleton.application.techlog.studio.model.RecordKind;
+import dev.caskeleton.application.techlog.studio.port.out.PublicationWriterPort;
+import dev.caskeleton.shared.error.MappingException;
+import java.nio.charset.StandardCharsets;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.util.HexFormat;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+import java.util.function.Supplier;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.jdbc.core.simple.JdbcClient;
+import org.springframework.stereotype.Repository;
+import org.springframework.transaction.support.TransactionSynchronizationManager;
+import tools.jackson.core.JacksonException;
+import tools.jackson.databind.ObjectMapper;
+import tools.jackson.databind.node.ArrayNode;
+import tools.jackson.databind.node.ObjectNode;
+
+/**
+ * spec §7.5 의 게시 트랜잭션 10~19단계.
+ *
+ * <p>{@code publication.latest_event_id} 와 {@code publication_event.publication_id} 는 서로를 가리킨다. 첫
+ * 게시는 publication INSERT → event INSERT → publication UPDATE 순서로 한 트랜잭션 안에서 끝나며, 그 순환을 허용하는 것이 V7 의
+ * {@code DEFERRABLE INITIALLY DEFERRED} 다. 즉시 검사로 바꾸면 첫 게시가 구조적으로 불가능해진다.
+ */
+@Repository
+public class JdbcPublicationWriterAdapter implements PublicationWriterPort {
+
+  /** 공개 projection payload 의 스키마 버전. 모양이 바뀌면 올린다. */
+  private static final short PAYLOAD_SCHEMA_VERSION = 1;
+
+  private final JdbcClient jdbcClient;
+  private final ObjectMapper objectMapper;
+  private final Supplier<UUID> idGenerator;
+
+  /**
+   * 생성자가 둘이라 Spring 이 어느 쪽을 쓸지 스스로 정하지 못한다 — 표시가 없으면 기본 생성자를 찾다 실패해 컨텍스트가 뜨지 않는다(실제로 부팅 검증에서 그렇게
+   * 실패했다). 두 번째 생성자는 테스트가 id 생성기를 주입하기 위한 것이며 프로덕션 배선은 항상 이쪽이다.
+   */
+  @Autowired
+  public JdbcPublicationWriterAdapter(JdbcClient jdbcClient, ObjectMapper objectMapper) {
+    this(jdbcClient, objectMapper, UUID::randomUUID);
+  }
+
+  JdbcPublicationWriterAdapter(
+      JdbcClient jdbcClient, ObjectMapper objectMapper, Supplier<UUID> idGenerator) {
+    this.jdbcClient = jdbcClient;
+    this.objectMapper = objectMapper;
+    this.idGenerator = idGenerator;
+  }
+
+  @Override
+  public Optional<PublicationAggregateView> lockCurrentPublication(
+      RecordKind kind, UUID documentId) {
+    return jdbcClient
+        .sql(
+            "SELECT publication_id, source_id, status, published_version, publication_revision,"
+                + " latest_event_id, public_path, updated_at FROM publication"
+                + " WHERE source_kind = :kind AND source_id = :id FOR UPDATE")
+        .param("kind", kind.name())
+        .param("id", documentId)
+        .query(JdbcPublicationWriterAdapter::mapAggregate)
+        .optional();
+  }
+
+  @Override
+  public PublishResultView publish(PublishRequest request) {
+    requireTransaction("publish");
+    Optional<PublicationAggregateView> existing =
+        lockCurrentPublication(request.kind(), request.documentId());
+
+    UUID publicationId =
+        existing.map(PublicationAggregateView::publicationId).orElseGet(idGenerator);
+    UUID eventId = idGenerator.get();
+    PublicationEventTypeView eventType =
+        existing.isEmpty()
+            ? PublicationEventTypeView.PUBLISHED
+            : PublicationEventTypeView.REPUBLISHED;
+
+    if (existing.isEmpty()) {
+      // 10 이전: aggregate 를 먼저 만든다. latest_event_id 는 아직 없는 event 를 가리키지만
+      // 지연 검사라 커밋 시점에만 확인된다.
+      jdbcClient
+          .sql(
+              "INSERT INTO publication (publication_id, source_kind, source_id, status,"
+                  + " published_version, publication_revision, latest_event_id, public_path)"
+                  + " VALUES (:publicationId, :kind, :id, 'PUBLISHED', :version, 1, :eventId,"
+                  + " :publicPath)")
+          .param("publicationId", publicationId)
+          .param("kind", request.kind().name())
+          .param("id", request.documentId())
+          .param("version", request.version())
+          .param("eventId", eventId)
+          .param("publicPath", request.publicPath())
+          .update();
+    }
+
+    // 10. Event
+    jdbcClient
+        .sql(
+            "INSERT INTO publication_event (publication_event_id, publication_id, source_kind,"
+                + " source_id, event_type, published_version, occurred_at, idempotency_key,"
+                + " created_by)"
+                + " VALUES (:eventId, :publicationId, :kind, :id, :type, :version, now(),"
+                + " :idempotencyKey, :principal)")
+        .param("eventId", eventId)
+        .param("publicationId", publicationId)
+        .param("kind", request.kind().name())
+        .param("id", request.documentId())
+        .param("type", eventType.name())
+        .param("version", request.version())
+        .param("idempotencyKey", request.idempotencyKey())
+        .param("principal", request.principal())
+        .update();
+
+    // 11. Snapshot — 게시 시점의 렌더 모델을 그대로 고정한다. 다시 렌더링하지 않는다.
+    jdbcClient
+        .sql(
+            "INSERT INTO publication_snapshot (publication_event_id, render_model,"
+                + " content_format_version, renderer_contract_version, asset_manifest)"
+                + " VALUES (:eventId, CAST(:renderModel AS jsonb), :contentFormatVersion,"
+                + " :rendererContractVersion, CAST(:assetManifest AS jsonb))")
+        .param("eventId", eventId)
+        .param("renderModel", request.renderModelJson())
+        .param("contentFormatVersion", request.contentFormatVersion())
+        .param("rendererContractVersion", request.rendererContractVersion())
+        .param("assetManifest", manifestJson(request.assetManifest()))
+        .update();
+
+    upsertProjection(request);
+    replaceRoute(request);
+    replaceProjectLink(request);
+    replacePublishedAssetReferences(request);
+    markAssetsFirstPublished(request);
+
+    // 17. aggregate 갱신
+    jdbcClient
+        .sql(
+            "UPDATE publication SET status = 'PUBLISHED', published_version = :version,"
+                + " publication_revision = publication_revision + :bump,"
+                + " latest_event_id = :eventId, public_path = :publicPath, updated_at = now()"
+                + " WHERE publication_id = :publicationId")
+        .param("version", request.version())
+        // 첫 게시는 INSERT 가 이미 revision 1 을 넣었다. 여기서 또 올리면 클라이언트가 받은 값과
+        // 다음 unpublish 가 요구하는 값이 어긋난다.
+        .param("bump", existing.isEmpty() ? 0 : 1)
+        .param("eventId", eventId)
+        .param("publicPath", request.publicPath())
+        .param("publicationId", publicationId)
+        .update();
+
+    // 18. Document publish metadata
+    markSourcePublished(request);
+
+    return result(publicationId, eventId);
+  }
+
+  @Override
+  public PublishResultView unpublish(UnpublishRequest request) {
+    requireTransaction("unpublish");
+    UUID lastPublishedEventId =
+        jdbcClient
+            .sql(
+                "SELECT publication_event_id FROM publication_event"
+                    + " WHERE publication_id = :publicationId"
+                    + " AND event_type IN ('PUBLISHED', 'REPUBLISHED')"
+                    + " ORDER BY occurred_at DESC LIMIT 1")
+            .param("publicationId", request.publicationId())
+            .query(UUID.class)
+            .optional()
+            .orElseThrow(
+                () ->
+                    StudioException.of(
+                        StudioError.PUBLICATION_CONFLICT,
+                        "this publication has no published event to withdraw"));
+
+    UUID eventId = idGenerator.get();
+    // UNPUBLISHED Event 는 자체 snapshot 을 만들지 않고 마지막 공개 Snapshot 을 참조한다(V7 주석).
+    jdbcClient
+        .sql(
+            "INSERT INTO publication_event (publication_event_id, publication_id, source_kind,"
+                + " source_id, event_type, published_version, source_published_event_id,"
+                + " occurred_at, created_by)"
+                + " SELECT :eventId, p.publication_id, p.source_kind, p.source_id, 'UNPUBLISHED',"
+                + " p.published_version, :sourceEventId, now(), :principal"
+                + " FROM publication p WHERE p.publication_id = :publicationId")
+        .param("eventId", eventId)
+        .param("sourceEventId", lastPublishedEventId)
+        .param("principal", request.principal())
+        .param("publicationId", request.publicationId())
+        .update();
+
+    int updated =
+        jdbcClient
+            .sql(
+                "UPDATE publication SET status = 'UNPUBLISHED',"
+                    + " publication_revision = publication_revision + 1,"
+                    + " latest_event_id = :eventId, updated_at = now()"
+                    + " WHERE publication_id = :publicationId"
+                    + " AND publication_revision = :expectedRevision")
+            .param("eventId", eventId)
+            .param("publicationId", request.publicationId())
+            .param("expectedRevision", request.expectedRevision())
+            .update();
+    if (updated == 0) {
+      throw StudioException.of(
+          StudioError.PUBLICATION_CONFLICT,
+          "the publication revision changed while withdrawing it");
+    }
+
+    // Projection ACTIVE -> WITHDRAWN. route 는 유지한다 — 주소가 사라지면 링크가 끊긴다.
+    jdbcClient
+        .sql(
+            "UPDATE public_resource_projection SET publication_state = 'WITHDRAWN',"
+                + " updated_at = now() WHERE resource_type = :type AND resource_id = :id")
+        .param("type", request.kind().name())
+        .param("id", request.documentId())
+        .update();
+
+    // Working copy 는 다시 초안으로 돌아간다.
+    if (request.kind() == RecordKind.CASE || request.kind() == RecordKind.REFERENCE) {
+      jdbcClient
+          .sql("UPDATE document SET workflow_status = 'DRAFT' WHERE id = :id")
+          .param("id", request.documentId())
+          .update();
+    }
+    return result(request.publicationId(), eventId);
+  }
+
+  /** 12. 공개 projection upsert. */
+  private void upsertProjection(PublishRequest request) {
+    jdbcClient
+        .sql(
+            "INSERT INTO public_resource_projection (resource_type, resource_id, source_version,"
+                + " publication_state, visibility, title, summary, state_code, primary_topic_id,"
+                + " payload_schema_version, payload, body_plain_text, search_text, content_hash,"
+                + " published_at, updated_at, navigation_path)"
+                + " VALUES (:type, :id, :version, 'ACTIVE', 'PUBLIC', :title, :summary,"
+                + " :stateCode, :topicId, :schemaVersion, CAST(:payload AS jsonb), :bodyPlainText,"
+                + " :searchText, :contentHash, now(), now(), :navigationPath)"
+                + " ON CONFLICT (resource_type, resource_id) DO UPDATE SET"
+                + " source_version = EXCLUDED.source_version,"
+                + " publication_state = 'ACTIVE',"
+                + " visibility = EXCLUDED.visibility,"
+                + " title = EXCLUDED.title,"
+                + " summary = EXCLUDED.summary,"
+                + " state_code = EXCLUDED.state_code,"
+                + " primary_topic_id = EXCLUDED.primary_topic_id,"
+                + " payload = EXCLUDED.payload,"
+                + " body_plain_text = EXCLUDED.body_plain_text,"
+                + " search_text = EXCLUDED.search_text,"
+                + " content_hash = EXCLUDED.content_hash,"
+                + " updated_at = now(),"
+                + " navigation_path = EXCLUDED.navigation_path")
+        .param("type", request.kind().name())
+        .param("id", request.documentId())
+        .param("version", request.version())
+        .param("title", request.title())
+        .param("summary", request.summary())
+        .param("stateCode", request.stateCode())
+        .param("topicId", request.topicId())
+        .param("schemaVersion", PAYLOAD_SCHEMA_VERSION)
+        .param("payload", request.renderModelJson())
+        .param("bodyPlainText", request.bodyPlainText())
+        .param(
+            "searchText",
+            String.join(
+                " ",
+                nullToEmpty(request.title()),
+                nullToEmpty(request.summary()),
+                nullToEmpty(request.bodyPlainText())))
+        .param("contentHash", sha256(request.renderModelJson()))
+        .param("navigationPath", request.publicPath())
+        .update();
+  }
+
+  /** 13. canonical route. 이전 slug 의 route 는 alias 로 남긴다 — 지우면 공개된 링크가 끊긴다. */
+  private void replaceRoute(PublishRequest request) {
+    jdbcClient
+        .sql(
+            "UPDATE public_route SET route_role = 'ALIAS'"
+                + " WHERE resource_type = :type AND resource_id = :id AND slug <> :slug")
+        .param("type", request.kind().name())
+        .param("id", request.documentId())
+        .param("slug", slugOf(request.publicPath()))
+        .update();
+    jdbcClient
+        .sql(
+            "INSERT INTO public_route (resource_type, slug, resource_id, route_role)"
+                + " VALUES (:type, :slug, :id, 'CANONICAL')"
+                + " ON CONFLICT (resource_type, slug) DO UPDATE SET"
+                + " resource_id = EXCLUDED.resource_id, route_role = 'CANONICAL'")
+        .param("type", request.kind().name())
+        .param("slug", slugOf(request.publicPath()))
+        .param("id", request.documentId())
+        .update();
+  }
+
+  /** 14. 공개 projection 의 프로젝트 링크. Studio 는 PRIMARY 하나만 소유한다. */
+  private void replaceProjectLink(PublishRequest request) {
+    jdbcClient
+        .sql(
+            "DELETE FROM public_resource_project_link"
+                + " WHERE resource_type = :type AND resource_id = :id AND relation_type = 'PRIMARY'")
+        .param("type", request.kind().name())
+        .param("id", request.documentId())
+        .update();
+    if (request.projectId() == null) {
+      return;
+    }
+    jdbcClient
+        .sql(
+            "INSERT INTO public_resource_project_link (resource_type, resource_id, project_id,"
+                + " relation_type) VALUES (:type, :id, :projectId, 'PRIMARY')"
+                + " ON CONFLICT (resource_type, resource_id, project_id)"
+                + " DO UPDATE SET relation_type = 'PRIMARY'")
+        .param("type", request.kind().name())
+        .param("id", request.documentId())
+        .param("projectId", request.projectId())
+        .update();
+  }
+
+  /** 15. PUBLISHED scope 의 asset_reference 교체. WORKING scope 는 건드리지 않는다. */
+  private void replacePublishedAssetReferences(PublishRequest request) {
+    String ownerType = ownerTypeOf(request.kind());
+    jdbcClient
+        .sql(
+            "DELETE FROM asset_reference WHERE owner_type = :ownerType AND owner_id = :id"
+                + " AND reference_scope = 'PUBLISHED'")
+        .param("ownerType", ownerType)
+        .param("id", request.documentId())
+        .update();
+    for (AssetManifestEntry entry : request.assetManifest()) {
+      jdbcClient
+          .sql(
+              "INSERT INTO asset_reference (asset_id, owner_type, owner_id, reference_scope,"
+                  + " reference_role) VALUES (:assetId, :ownerType, :id, 'PUBLISHED', 'BODY')"
+                  + " ON CONFLICT DO NOTHING")
+          .param("assetId", entry.assetId())
+          .param("ownerType", ownerType)
+          .param("id", request.documentId())
+          .update();
+    }
+  }
+
+  /** 16. 최초 공개 시각. 이미 값이 있으면 덮지 않는다 — "처음"은 한 번뿐이다. */
+  private void markAssetsFirstPublished(PublishRequest request) {
+    for (AssetManifestEntry entry : request.assetManifest()) {
+      jdbcClient
+          .sql(
+              "UPDATE asset SET first_published_at = now()"
+                  + " WHERE id = :assetId AND first_published_at IS NULL")
+          .param("assetId", entry.assetId())
+          .update();
+    }
+  }
+
+  /** 18. source 쪽 게시 메타데이터. */
+  private void markSourcePublished(PublishRequest request) {
+    // switch 문이 아니라 식이다 — 열거 전부를 다루면 default 가 필요 없고, 유형이 늘면 컴파일러가
+    // 여기서 막아 준다(문이면 조용히 아무것도 안 하고 지나간다).
+    int updated =
+        switch (request.kind()) {
+          case CASE, REFERENCE ->
+              jdbcClient
+                  .sql(
+                      "UPDATE document SET workflow_status = 'PUBLISHED',"
+                          + " first_published_at = COALESCE(first_published_at, now()),"
+                          + " last_published_at = now() WHERE id = :id")
+                  .param("id", request.documentId())
+                  .update();
+          case QUESTION ->
+              jdbcClient
+                  .sql(
+                      "UPDATE open_question SET"
+                          + " first_published_at = COALESCE(first_published_at, now()),"
+                          + " last_published_at = now() WHERE id = :id")
+                  .param("id", request.documentId())
+                  .update();
+          // project_decision 에는 게시 시각 컬럼이 없다. 게시 사실은 publication 이 소유하므로
+          // 여기서 억지로 컬럼을 만들지 않는다.
+          case PROJECT_DECISION -> 0;
+        };
+    if (updated == 0 && request.kind() != RecordKind.PROJECT_DECISION) {
+      throw StudioException.of(
+          StudioError.DOCUMENT_NOT_FOUND,
+          "the source record disappeared while publishing " + request.documentId());
+    }
+  }
+
+  private PublishResultView result(UUID publicationId, UUID eventId) {
+    PublicationAggregateView aggregate =
+        jdbcClient
+            .sql(
+                "SELECT publication_id, source_id, status, published_version,"
+                    + " publication_revision, latest_event_id, public_path, updated_at"
+                    + " FROM publication WHERE publication_id = :id")
+            .param("id", publicationId)
+            .query(JdbcPublicationWriterAdapter::mapAggregate)
+            .single();
+    PublicationEventView event =
+        jdbcClient
+            .sql(
+                "SELECT e.publication_event_id, e.publication_id, e.source_id, e.event_type,"
+                    + " e.occurred_at, e.published_version, e.source_published_event_id,"
+                    + " (s.publication_event_id IS NOT NULL) AS snapshot_available"
+                    + " FROM publication_event e"
+                    + " LEFT JOIN publication_snapshot s"
+                    + " ON s.publication_event_id = e.publication_event_id"
+                    + " WHERE e.publication_event_id = :id")
+            .param("id", eventId)
+            .query(PublicationRowMappers::mapEvent)
+            .single();
+    return new PublishResultView(aggregate, event);
+  }
+
+  /**
+   * 이 어댑터는 <b>열린 트랜잭션 안에서만</b> 올바르게 동작한다.
+   *
+   * <p>{@code publication.latest_event_id} 와 {@code publication_event.publication_id} 가 서로를 가리키고, 그
+   * 순환은 {@code fk_publication_latest_event} 의 {@code DEFERRABLE INITIALLY DEFERRED} 로만 성립한다. 지연 검사는
+   * <b>트랜잭션 끝</b>에 일어나므로, autocommit 이면 각 구문이 곧 트랜잭션이라 첫 INSERT 에서 바로 위반이 된다.
+   *
+   * <p>이 사실을 주석으로만 남기면 트랜잭션 없이 호출한 코드가 "외래 키 위반"이라는, 원인과 한참 떨어진 오류를 만난다. 통합 테스트를 처음 돌렸을 때 실제로 그렇게
+   * 실패했다. 그래서 전제를 여기서 확인하고 무엇이 잘못됐는지 그대로 말한다.
+   */
+  private static void requireTransaction(String operation) {
+    if (!TransactionSynchronizationManager.isActualTransactionActive()) {
+      throw new IllegalStateException(
+          "publication "
+              + operation
+              + " must run inside an active transaction: publication and publication_event"
+              + " reference each other, and that cycle only resolves at commit through"
+              + " fk_publication_latest_event's deferred check");
+    }
+  }
+
+  static PublicationAggregateView mapAggregate(java.sql.ResultSet rs, int rowNum)
+      throws java.sql.SQLException {
+    return new PublicationAggregateView(
+        rs.getObject("publication_id", UUID.class),
+        rs.getObject("source_id", UUID.class),
+        PublicationAggregateStatus.valueOf(rs.getString("status")),
+        rs.getLong("published_version"),
+        rs.getLong("publication_revision"),
+        rs.getObject("latest_event_id", UUID.class),
+        rs.getString("public_path"),
+        rs.getTimestamp("updated_at").toInstant());
+  }
+
+  private String manifestJson(List<AssetManifestEntry> manifest) {
+    ArrayNode array = objectMapper.createArrayNode();
+    for (AssetManifestEntry entry : manifest) {
+      ObjectNode node = array.addObject();
+      node.put("assetId", entry.assetId() == null ? null : entry.assetId().toString());
+      node.put("assetKey", entry.assetKey());
+      node.put("mediaType", entry.mediaType());
+      node.put("publicPath", entry.publicPath());
+      node.put("width", entry.width());
+      node.put("height", entry.height());
+      node.put("decorative", entry.decorative());
+    }
+    try {
+      return objectMapper.writeValueAsString(array);
+    } catch (JacksonException e) {
+      throw new MappingException("failed to serialise a publication asset manifest", e);
+    }
+  }
+
+  /** {@code asset_reference.owner_type} 은 {@code RecordKind} 와 이름이 다르다(V7). */
+  private static String ownerTypeOf(RecordKind kind) {
+    return switch (kind) {
+      case CASE, REFERENCE -> "DOCUMENT";
+      case QUESTION -> "QUESTION";
+      case PROJECT_DECISION -> "DECISION";
+    };
+  }
+
+  /** {@code public_route.slug} 는 경로가 아니라 마지막 조각이다. */
+  private static String slugOf(String publicPath) {
+    if (publicPath == null || publicPath.isBlank()) {
+      throw StudioException.of(
+          StudioError.DOCUMENT_VALIDATION_FAILED, "a published record needs a public path");
+    }
+    return publicPath.substring(publicPath.lastIndexOf('/') + 1);
+  }
+
+  private static String nullToEmpty(String value) {
+    return value == null ? "" : value;
+  }
+
+  private static String sha256(String value) {
+    try {
+      return HexFormat.of()
+          .formatHex(
+              MessageDigest.getInstance("SHA-256")
+                  .digest(nullToEmpty(value).getBytes(StandardCharsets.UTF_8)));
+    } catch (NoSuchAlgorithmException e) {
+      throw new IllegalStateException("SHA-256 must be available on every supported JVM", e);
+    }
+  }
+}

src/adapter/outbound/persistence-jpa/src/main/java/dev/caskeleton/adapter/outbound/persistence/techlog/studio/publication/PublicationRowMappers.java

@@ -0,0 +1,25 @@
+package dev.caskeleton.adapter.outbound.persistence.techlog.studio.publication;
+
+import dev.caskeleton.application.techlog.studio.model.PublicationEventTypeView;
+import dev.caskeleton.application.techlog.studio.model.PublicationEventView;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.UUID;
+
+/** {@code publication_event} 행 매핑. writer 와 조회 어댑터가 같은 모양을 쓰도록 한 곳에 둔다. */
+final class PublicationRowMappers {
+
+  private PublicationRowMappers() {}
+
+  static PublicationEventView mapEvent(ResultSet rs, int rowNum) throws SQLException {
+    return new PublicationEventView(
+        rs.getObject("publication_event_id", UUID.class),
+        rs.getObject("publication_id", UUID.class),
+        rs.getObject("source_id", UUID.class),
+        PublicationEventTypeView.valueOf(rs.getString("event_type")),
+        rs.getTimestamp("occurred_at").toInstant(),
+        rs.getLong("published_version"),
+        rs.getObject("source_published_event_id", UUID.class),
+        rs.getBoolean("snapshot_available"));
+  }
+}

src/adapter/outbound/persistence-jpa/src/main/java/dev/caskeleton/adapter/outbound/persistence/techlog/workingcopy/DocumentWorkingCopyStore.java

@@ -0,0 +1,255 @@
+package dev.caskeleton.adapter.outbound.persistence.techlog.workingcopy;
+
+import static dev.caskeleton.adapter.outbound.persistence.techlog.workingcopy.StudioSqlSupport.dateFromTimestamp;
+import static dev.caskeleton.adapter.outbound.persistence.techlog.workingcopy.StudioSqlSupport.dateToTimestamp;
+import static dev.caskeleton.adapter.outbound.persistence.techlog.workingcopy.StudioSqlSupport.instant;
+import static dev.caskeleton.adapter.outbound.persistence.techlog.workingcopy.StudioSqlSupport.orEmpty;
+import static dev.caskeleton.adapter.outbound.persistence.techlog.workingcopy.StudioSqlSupport.slugFromColumn;
+import static dev.caskeleton.adapter.outbound.persistence.techlog.workingcopy.StudioSqlSupport.slugToColumn;
+
+import dev.caskeleton.application.techlog.studio.model.RecordKind;
+import dev.caskeleton.application.techlog.studio.model.RelationView;
+import dev.caskeleton.application.techlog.studio.model.WorkingCopyBaseInput;
+import dev.caskeleton.application.techlog.studio.model.WorkingCopyInputView;
+import dev.caskeleton.application.techlog.studio.model.WorkingCopyView;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+import java.util.function.Supplier;
+import org.springframework.jdbc.core.simple.JdbcClient;
+
+/**
+ * {@code CASE} / {@code REFERENCE} 편집본. 둘 다 {@code document} 루트 + 유형별 detail 테이블이다 (ADR-003, 설계
+ * 07장).
+ */
+final class DocumentWorkingCopyStore {
+
+  private final JdbcClient jdbcClient;
+  private final StudioRelationStore relations;
+  private final StudioJson json;
+  private final Supplier<UUID> idGenerator;
+  private final ProjectLinkStore projectLinks;
+
+  DocumentWorkingCopyStore(
+      JdbcClient jdbcClient,
+      StudioRelationStore relations,
+      StudioJson json,
+      Supplier<UUID> idGenerator,
+      ProjectLinkStore projectLinks) {
+    this.jdbcClient = jdbcClient;
+    this.relations = relations;
+    this.json = json;
+    this.idGenerator = idGenerator;
+    this.projectLinks = projectLinks;
+  }
+
+  Optional<WorkingCopyView> find(RecordKind kind, UUID id) {
+    return jdbcClient
+        .sql(
+            "SELECT d.id, d.version, d.updated_at, d.title, d.slug, d.summary, d.primary_topic_id,"
+                + " d.body_markdown, d.last_verified_at,"
+                + " c.problem_summary, c.conclusion_summary, c.environment, c.reproduction,"
+                + " r.scope_summary, r.rules, r.applies_to, r.excluded_scope, r.examples"
+                + " FROM document d"
+                + " LEFT JOIN case_detail c ON c.document_id = d.id"
+                + " LEFT JOIN reference_detail r ON r.document_id = d.id"
+                + " WHERE d.id = :id AND d.document_type = :type")
+        .param("id", id)
+        .param("type", kind.name())
+        .query(
+            (rs, rowNum) -> {
+              UUID documentId = rs.getObject("id", UUID.class);
+              WorkingCopyBaseInput base =
+                  new WorkingCopyBaseInput(
+                      kind,
+                      rs.getString("title"),
+                      slugFromColumn(rs.getString("slug")),
+                      orEmpty(rs.getString("summary")),
+                      rs.getObject("primary_topic_id", UUID.class),
+                      projectLinks.findPrimaryProjectForDocument(documentId).orElse(null),
+                      relations.findBySource(kind, documentId));
+              long version = rs.getLong("version");
+              var updatedAt = instant(rs, "updated_at");
+              if (kind == RecordKind.CASE) {
+                return (WorkingCopyView)
+                    new WorkingCopyView.CaseWorkingCopyView(
+                        documentId,
+                        version,
+                        updatedAt,
+                        base,
+                        orEmpty(rs.getString("problem_summary")),
+                        orEmpty(rs.getString("conclusion_summary")),
+                        orEmpty(rs.getString("environment")),
+                        orEmpty(rs.getString("reproduction")),
+                        dateFromTimestamp(rs, "last_verified_at"),
+                        orEmpty(rs.getString("body_markdown")));
+              }
+              return (WorkingCopyView)
+                  new WorkingCopyView.ReferenceWorkingCopyView(
+                      documentId,
+                      version,
+                      updatedAt,
+                      base,
+                      orEmpty(rs.getString("scope_summary")),
+                      json.rulesFromJson(rs.getString("rules")),
+                      json.orderedTextFromJson(rs.getString("applies_to")),
+                      json.orderedTextFromJson(rs.getString("excluded_scope")),
+                      json.orderedTextFromJson(rs.getString("examples")),
+                      dateFromTimestamp(rs, "last_verified_at"));
+            })
+        .optional();
+  }
+
+  UUID create(WorkingCopyInputView input, String principal) {
+    RecordKind kind = input.kind();
+    UUID id = idGenerator.get();
+    WorkingCopyBaseInput base = input.base();
+
+    jdbcClient
+        .sql(
+            "INSERT INTO document (id, document_type, slug, title, summary, body_markdown,"
+                + " primary_topic_id, last_verified_at, version, created_by, updated_by)"
+                + " VALUES (:id, :type, :slug, :title, :summary, :body, :topicId, :verifiedAt,"
+                // 계약의 WorkingCopyBase.version 은 minimum 1 이다. 컬럼 기본값 0 을 그대로 두면
+                // 생성 직후 응답이 계약을 위반한다.
+                + " 1, :principal, :principal)")
+        .param("id", id)
+        .param("type", kind.name())
+        .param("slug", slugToColumn(base.slug()))
+        .param("title", orEmpty(base.title()))
+        .param("summary", orEmpty(base.summary()))
+        .param("body", bodyMarkdownOf(input))
+        .param("topicId", base.topicId())
+        .param("verifiedAt", dateToTimestamp(verifiedOnOf(input)))
+        .param("principal", principal)
+        .update();
+
+    insertDetail(id, input);
+    relations.replace(kind, id, base.relations());
+    projectLinks.setPrimaryProjectForDocument(id, base.projectId());
+    return id;
+  }
+
+  /**
+   * 낙관적 잠금 저장.
+   *
+   * @return 갱신된 행이 없으면(= {@code expectedVersion} 불일치) {@code false}
+   */
+  boolean save(UUID id, long expectedVersion, WorkingCopyInputView input, String principal) {
+    RecordKind kind = input.kind();
+    WorkingCopyBaseInput base = input.base();
+    int updated =
+        jdbcClient
+            .sql(
+                "UPDATE document SET slug = :slug, title = :title, summary = :summary,"
+                    + " body_markdown = :body, primary_topic_id = :topicId,"
+                    + " last_verified_at = :verifiedAt, version = version + 1,"
+                    + " updated_at = now(), updated_by = :principal"
+                    + " WHERE id = :id AND document_type = :type AND version = :expectedVersion")
+            .param("slug", slugToColumn(base.slug()))
+            .param("title", orEmpty(base.title()))
+            .param("summary", orEmpty(base.summary()))
+            .param("body", bodyMarkdownOf(input))
+            .param("topicId", base.topicId())
+            .param("verifiedAt", dateToTimestamp(verifiedOnOf(input)))
+            .param("principal", principal)
+            .param("id", id)
+            .param("type", kind.name())
+            .param("expectedVersion", expectedVersion)
+            .update();
+    if (updated == 0) {
+      return false;
+    }
+    updateDetail(id, input);
+    relations.replace(kind, id, base.relations());
+    projectLinks.setPrimaryProjectForDocument(id, base.projectId());
+    return true;
+  }
+
+  private void insertDetail(UUID id, WorkingCopyInputView input) {
+    switch (input) {
+      case WorkingCopyInputView.CaseInputView caseInput ->
+          jdbcClient
+              .sql(
+                  "INSERT INTO case_detail (document_id, document_type, problem_summary,"
+                      + " conclusion_summary, environment, reproduction)"
+                      + " VALUES (:id, 'CASE', :problem, :conclusion, :environment, :reproduction)")
+              .param("id", id)
+              .param("problem", orEmpty(caseInput.problem()))
+              .param("conclusion", orEmpty(caseInput.conclusion()))
+              .param("environment", orEmpty(caseInput.environment()))
+              .param("reproduction", orEmpty(caseInput.reproduction()))
+              .update();
+      case WorkingCopyInputView.ReferenceInputView reference ->
+          jdbcClient
+              .sql(
+                  "INSERT INTO reference_detail (document_id, document_type, scope_summary,"
+                      + " rules, applies_to, excluded_scope, examples)"
+                      + " VALUES (:id, 'REFERENCE', :purpose, CAST(:rules AS jsonb),"
+                      + " CAST(:applyWhen AS jsonb), CAST(:exceptions AS jsonb),"
+                      + " CAST(:examples AS jsonb))")
+              .param("id", id)
+              .param("purpose", orEmpty(reference.purpose()))
+              .param("rules", json.rulesToJson(reference.rules()))
+              .param("applyWhen", json.orderedTextToJson(reference.applyWhen()))
+              .param("exceptions", json.orderedTextToJson(reference.exceptions()))
+              .param("examples", json.orderedTextToJson(reference.examples()))
+              .update();
+      default ->
+          throw new IllegalArgumentException("not a document-backed working copy: " + input.kind());
+    }
+  }
+
+  private void updateDetail(UUID id, WorkingCopyInputView input) {
+    switch (input) {
+      case WorkingCopyInputView.CaseInputView caseInput ->
+          jdbcClient
+              .sql(
+                  "UPDATE case_detail SET problem_summary = :problem,"
+                      + " conclusion_summary = :conclusion, environment = :environment,"
+                      + " reproduction = :reproduction WHERE document_id = :id")
+              .param("id", id)
+              .param("problem", orEmpty(caseInput.problem()))
+              .param("conclusion", orEmpty(caseInput.conclusion()))
+              .param("environment", orEmpty(caseInput.environment()))
+              .param("reproduction", orEmpty(caseInput.reproduction()))
+              .update();
+      case WorkingCopyInputView.ReferenceInputView reference ->
+          jdbcClient
+              .sql(
+                  "UPDATE reference_detail SET scope_summary = :purpose,"
+                      + " rules = CAST(:rules AS jsonb), applies_to = CAST(:applyWhen AS jsonb),"
+                      + " excluded_scope = CAST(:exceptions AS jsonb),"
+                      + " examples = CAST(:examples AS jsonb) WHERE document_id = :id")
+              .param("id", id)
+              .param("purpose", orEmpty(reference.purpose()))
+              .param("rules", json.rulesToJson(reference.rules()))
+              .param("applyWhen", json.orderedTextToJson(reference.applyWhen()))
+              .param("exceptions", json.orderedTextToJson(reference.exceptions()))
+              .param("examples", json.orderedTextToJson(reference.examples()))
+              .update();
+      default ->
+          throw new IllegalArgumentException("not a document-backed working copy: " + input.kind());
+    }
+  }
+
+  /** {@code REFERENCE}는 계약에 본문이 없다 — 컬럼이 NOT NULL이므로 빈 문자열을 유지한다. */
+  private static String bodyMarkdownOf(WorkingCopyInputView input) {
+    return input instanceof WorkingCopyInputView.CaseInputView caseInput
+        ? orEmpty(caseInput.bodyMarkdown())
+        : "";
+  }
+
+  /** 계약의 {@code lastVerifiedOn}(CASE) / {@code verifiedOn}(REFERENCE)은 같은 컬럼에 담긴다. */
+  private static java.time.LocalDate verifiedOnOf(WorkingCopyInputView input) {
+    return switch (input) {
+      case WorkingCopyInputView.CaseInputView caseInput -> caseInput.lastVerifiedOn();
+      case WorkingCopyInputView.ReferenceInputView reference -> reference.verifiedOn();
+      default -> null;
+    };
+  }
+
+  List<RelationView> relationsOf(RecordKind kind, UUID id) {
+    return relations.findBySource(kind, id);
+  }
+}

src/adapter/outbound/persistence-jpa/src/main/java/dev/caskeleton/adapter/outbound/persistence/techlog/workingcopy/JdbcWorkingCopyRepositoryAdapter.java

@@ -0,0 +1,128 @@
+package dev.caskeleton.adapter.outbound.persistence.techlog.workingcopy;
+
+import dev.caskeleton.application.techlog.error.StudioError;
+import dev.caskeleton.application.techlog.error.StudioException;
+import dev.caskeleton.application.techlog.studio.model.RecordKind;
+import dev.caskeleton.application.techlog.studio.model.WorkingCopyInputView;
+import dev.caskeleton.application.techlog.studio.model.WorkingCopyView;
+import dev.caskeleton.application.techlog.studio.port.out.WorkingCopyRepositoryPort;
+import java.util.Optional;
+import java.util.UUID;
+import java.util.function.Supplier;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.jdbc.core.simple.JdbcClient;
+import org.springframework.stereotype.Repository;
+import tools.jackson.databind.ObjectMapper;
+
+/**
+ * 계약의 통합 {@code WorkingCopy}를 네 source aggregate로 dispatch한다.
+ *
+ * <p>공통 CRUD repository가 아니다 — {@code kind}마다 소유 테이블이 다르고, 그 구분을 유지하는 것이 ADR-003의 결정이다. 여기서 하는 일은
+ * "어느 저장소로 보낼지" 뿐이다.
+ *
+ * <p>JPA 엔티티가 아니라 {@code JdbcClient}를 쓴다. 이 네 aggregate는 Studio 저장 경로에서만 쓰이고, 낙관적 잠금은 {@code UPDATE
+ * ... WHERE version = :expectedVersion}의 갱신 행 수로 정확히 같은 의미를 얻는다 — 여덟 개 넘는 테이블에 엔티티와 매핑을 세우는 비용에
+ * 상응하는 이득이 없다. 포트 계약이 같으므로 나중에 JPA 가 필요해지면 이 어댑터만 바뀐다.
+ */
+@Repository
+public class JdbcWorkingCopyRepositoryAdapter implements WorkingCopyRepositoryPort {
+
+  private final JdbcClient jdbcClient;
+  private final DocumentWorkingCopyStore documents;
+  private final QuestionWorkingCopyStore questions;
+  private final ProjectDecisionWorkingCopyStore decisions;
+
+  /**
+   * 생성자가 둘이라 Spring 이 어느 쪽을 쓸지 스스로 정하지 못한다 — 표시가 없으면 기본 생성자를 찾다 실패해 컨텍스트가 뜨지 않는다(실제로 부팅 검증에서 그렇게
+   * 실패했다). 두 번째 생성자는 테스트가 id 생성기를 주입하기 위한 것이며 프로덕션 배선은 항상 이쪽이다.
+   */
+  @Autowired
+  public JdbcWorkingCopyRepositoryAdapter(JdbcClient jdbcClient, ObjectMapper objectMapper) {
+    this(jdbcClient, objectMapper, UUID::randomUUID);
+  }
+
+  JdbcWorkingCopyRepositoryAdapter(
+      JdbcClient jdbcClient, ObjectMapper objectMapper, Supplier<UUID> idGenerator) {
+    this.jdbcClient = jdbcClient;
+    StudioJson json = new StudioJson(objectMapper);
+    StudioRelationStore relations = new StudioRelationStore(jdbcClient, idGenerator);
+    ProjectLinkStore projectLinks = new ProjectLinkStore(jdbcClient);
+    this.documents =
+        new DocumentWorkingCopyStore(jdbcClient, relations, json, idGenerator, projectLinks);
+    this.questions =
+        new QuestionWorkingCopyStore(jdbcClient, relations, json, idGenerator, projectLinks);
+    this.decisions = new ProjectDecisionWorkingCopyStore(jdbcClient, relations, json, idGenerator);
+  }
+
+  /**
+   * 계약상 {@code documentId}는 source aggregate id 그대로다 — 어느 테이블에 있는지 먼저 찾아야 한다 (spec §7.2
+   * StudioDocumentLocator). 세 테이블을 UNION 으로 한 번에 본다.
+   */
+  @Override
+  public Optional<RecordKind> findKind(UUID documentId) {
+    if (documentId == null) {
+      return Optional.empty();
+    }
+    return jdbcClient
+        .sql(
+            "SELECT document_type AS kind FROM document WHERE id = :id"
+                + " UNION ALL SELECT 'QUESTION' FROM open_question WHERE id = :id"
+                + " UNION ALL SELECT 'PROJECT_DECISION' FROM project_decision WHERE id = :id")
+        .param("id", documentId)
+        .query(String.class)
+        .optional()
+        .map(RecordKind::valueOf);
+  }
+
+  @Override
+  public Optional<WorkingCopyView> find(UUID documentId) {
+    return findKind(documentId).flatMap(kind -> load(kind, documentId));
+  }
+
+  @Override
+  public WorkingCopyView create(WorkingCopyInputView input, String principal) {
+    UUID id =
+        switch (input) {
+          case WorkingCopyInputView.CaseInputView ignored -> documents.create(input, principal);
+          case WorkingCopyInputView.ReferenceInputView ignored ->
+              documents.create(input, principal);
+          case WorkingCopyInputView.QuestionInputView question ->
+              questions.create(question, principal);
+          case WorkingCopyInputView.ProjectDecisionInputView decision ->
+              decisions.create(decision, principal);
+        };
+    return load(input.kind(), id)
+        .orElseThrow(
+            () ->
+                StudioException.of(
+                    StudioError.STUDIO_UNAVAILABLE,
+                    "the working copy "
+                        + id
+                        + " could not be read back right after it was created"));
+  }
+
+  @Override
+  public Optional<WorkingCopyView> save(
+      UUID documentId, long expectedVersion, WorkingCopyInputView input, String principal) {
+    boolean saved =
+        switch (input) {
+          case WorkingCopyInputView.CaseInputView ignored ->
+              documents.save(documentId, expectedVersion, input, principal);
+          case WorkingCopyInputView.ReferenceInputView ignored ->
+              documents.save(documentId, expectedVersion, input, principal);
+          case WorkingCopyInputView.QuestionInputView question ->
+              questions.save(documentId, expectedVersion, question, principal);
+          case WorkingCopyInputView.ProjectDecisionInputView decision ->
+              decisions.save(documentId, expectedVersion, decision, principal);
+        };
+    return saved ? load(input.kind(), documentId) : Optional.empty();
+  }
+
+  private Optional<WorkingCopyView> load(RecordKind kind, UUID id) {
+    return switch (kind) {
+      case CASE, REFERENCE -> documents.find(kind, id);
+      case QUESTION -> questions.find(id);
+      case PROJECT_DECISION -> decisions.find(id);
+    };
+  }
+}

src/adapter/outbound/persistence-jpa/src/main/java/dev/caskeleton/adapter/outbound/persistence/techlog/workingcopy/ProjectDecisionWorkingCopyStore.java

@@ -0,0 +1,180 @@
+package dev.caskeleton.adapter.outbound.persistence.techlog.workingcopy;
+
+import static dev.caskeleton.adapter.outbound.persistence.techlog.workingcopy.StudioSqlSupport.dateFromTimestamp;
+import static dev.caskeleton.adapter.outbound.persistence.techlog.workingcopy.StudioSqlSupport.dateToTimestamp;
+import static dev.caskeleton.adapter.outbound.persistence.techlog.workingcopy.StudioSqlSupport.instant;
+import static dev.caskeleton.adapter.outbound.persistence.techlog.workingcopy.StudioSqlSupport.orEmpty;
+import static dev.caskeleton.adapter.outbound.persistence.techlog.workingcopy.StudioSqlSupport.slugFromColumn;
+import static dev.caskeleton.adapter.outbound.persistence.techlog.workingcopy.StudioSqlSupport.slugToColumn;
+
+import dev.caskeleton.application.techlog.error.StudioError;
+import dev.caskeleton.application.techlog.error.StudioException;
+import dev.caskeleton.application.techlog.studio.model.DecisionStatusView;
+import dev.caskeleton.application.techlog.studio.model.RecordKind;
+import dev.caskeleton.application.techlog.studio.model.WorkingCopyBaseInput;
+import dev.caskeleton.application.techlog.studio.model.WorkingCopyInputView;
+import dev.caskeleton.application.techlog.studio.model.WorkingCopyView;
+import java.util.Optional;
+import java.util.UUID;
+import java.util.function.Supplier;
+import org.springframework.jdbc.core.simple.JdbcClient;
+
+/**
+ * {@code PROJECT_DECISION} 편집본 ({@code project_decision}).
+ *
+ * <p>계약의 {@code ADOPTED}는 Domain의 {@code ACCEPTED}다(ADR-003) — UI 용어 때문에 Domain enum을 바꾸지 않고 여기서
+ * 변환한다. {@code supersede}/{@code reject}는 secondary management 계약이 소유하므로 이 저장 경로가 그 두 상태를 만들지도,
+ * 건드리지도 않는다.
+ */
+final class ProjectDecisionWorkingCopyStore {
+
+  private final JdbcClient jdbcClient;
+  private final StudioRelationStore relations;
+  private final StudioJson json;
+  private final Supplier<UUID> idGenerator;
+
+  ProjectDecisionWorkingCopyStore(
+      JdbcClient jdbcClient,
+      StudioRelationStore relations,
+      StudioJson json,
+      Supplier<UUID> idGenerator) {
+    this.jdbcClient = jdbcClient;
+    this.relations = relations;
+    this.json = json;
+    this.idGenerator = idGenerator;
+  }
+
+  Optional<WorkingCopyView> find(UUID id) {
+    return jdbcClient
+        .sql(
+            "SELECT id, version, updated_at, title, slug, summary, primary_topic_id, project_id,"
+                + " decision_status, decided_at, statement, rationale_markdown, consequences"
+                + " FROM project_decision WHERE id = :id")
+        .param("id", id)
+        .query(
+            (rs, rowNum) -> {
+              UUID decisionId = rs.getObject("id", UUID.class);
+              WorkingCopyBaseInput base =
+                  new WorkingCopyBaseInput(
+                      RecordKind.PROJECT_DECISION,
+                      orEmpty(rs.getString("title")),
+                      slugFromColumn(rs.getString("slug")),
+                      orEmpty(rs.getString("summary")),
+                      rs.getObject("primary_topic_id", UUID.class),
+                      rs.getObject("project_id", UUID.class),
+                      relations.findBySource(RecordKind.PROJECT_DECISION, decisionId));
+              return (WorkingCopyView)
+                  new WorkingCopyView.ProjectDecisionWorkingCopyView(
+                      decisionId,
+                      rs.getLong("version"),
+                      instant(rs, "updated_at"),
+                      base,
+                      toContractStatus(rs.getString("decision_status")),
+                      dateFromTimestamp(rs, "decided_at"),
+                      orEmpty(rs.getString("statement")),
+                      orEmpty(rs.getString("rationale_markdown")),
+                      json.orderedTextFromJson(rs.getString("consequences")));
+            })
+        .optional();
+  }
+
+  UUID create(WorkingCopyInputView.ProjectDecisionInputView input, String principal) {
+    requireDecidedOnWhenAdopted(input);
+    UUID id = idGenerator.get();
+    WorkingCopyBaseInput base = input.base();
+
+    jdbcClient
+        .sql(
+            "INSERT INTO project_decision (id, project_id, title, slug, summary,"
+                + " primary_topic_id, statement, rationale_markdown, consequences,"
+                + " decision_status, decided_at, version, created_by, updated_by)"
+                + " VALUES (:id, :projectId, :title, :slug, :summary, :topicId, :statement,"
+                + " :rationale, CAST(:consequences AS jsonb), :status, :decidedAt, 1,"
+                + " :principal, :principal)")
+        .param("id", id)
+        .param("projectId", base.projectId())
+        .param("title", orEmpty(base.title()))
+        .param("slug", slugToColumn(base.slug()))
+        .param("summary", orEmpty(base.summary()))
+        .param("topicId", base.topicId())
+        .param("statement", orEmpty(input.statement()))
+        .param("rationale", orEmpty(input.rationale()))
+        .param("consequences", json.orderedTextToJson(input.consequences()))
+        .param("status", toDomainStatus(input.decisionStatus()))
+        .param("decidedAt", dateToTimestamp(input.decidedOn()))
+        .param("principal", principal)
+        .update();
+
+    relations.replace(RecordKind.PROJECT_DECISION, id, base.relations());
+    return id;
+  }
+
+  boolean save(
+      UUID id,
+      long expectedVersion,
+      WorkingCopyInputView.ProjectDecisionInputView input,
+      String principal) {
+    requireDecidedOnWhenAdopted(input);
+    WorkingCopyBaseInput base = input.base();
+    int updated =
+        jdbcClient
+            .sql(
+                "UPDATE project_decision SET project_id = :projectId, title = :title,"
+                    + " slug = :slug, summary = :summary, primary_topic_id = :topicId,"
+                    + " statement = :statement, rationale_markdown = :rationale,"
+                    + " consequences = CAST(:consequences AS jsonb),"
+                    // SUPERSEDED/REJECTED 는 secondary management 계약이 소유한다. Studio 저장이
+                    // 그 상태를 PROPOSED/ACCEPTED 로 되돌리면 그쪽 lifecycle 이 조용히 무효화된다.
+                    + " decision_status = CASE WHEN decision_status IN ('PROPOSED', 'ACCEPTED')"
+                    + "   THEN :status ELSE decision_status END,"
+                    + " decided_at = :decidedAt,"
+                    + " version = version + 1, updated_at = now(), updated_by = :principal"
+                    + " WHERE id = :id AND version = :expectedVersion")
+            .param("projectId", base.projectId())
+            .param("title", orEmpty(base.title()))
+            .param("slug", slugToColumn(base.slug()))
+            .param("summary", orEmpty(base.summary()))
+            .param("topicId", base.topicId())
+            .param("statement", orEmpty(input.statement()))
+            .param("rationale", orEmpty(input.rationale()))
+            .param("consequences", json.orderedTextToJson(input.consequences()))
+            .param("status", toDomainStatus(input.decisionStatus()))
+            .param("decidedAt", dateToTimestamp(input.decidedOn()))
+            .param("principal", principal)
+            .param("id", id)
+            .param("expectedVersion", expectedVersion)
+            .update();
+    if (updated == 0) {
+      return false;
+    }
+    relations.replace(RecordKind.PROJECT_DECISION, id, base.relations());
+    return true;
+  }
+
+  /**
+   * {@code ck_project_decision_status_fields}는 {@code ACCEPTED}에 {@code decided_at}을 요구한다. 값을 지어내
+   * 채우면 사용자가 정하지 않은 날짜가 기록되고, 그냥 보내면 DB 제약 위반이 500으로 나간다 — 무엇이 빠졌는지 알려주고 거절한다.
+   */
+  private static void requireDecidedOnWhenAdopted(
+      WorkingCopyInputView.ProjectDecisionInputView input) {
+    if (input.decisionStatus() == DecisionStatusView.ADOPTED && input.decidedOn() == null) {
+      throw StudioException.of(
+          StudioError.REQUEST_VALIDATION_FAILED,
+          "document.decidedOn is required when decisionStatus is ADOPTED");
+    }
+  }
+
+  private static String toDomainStatus(DecisionStatusView status) {
+    return status == DecisionStatusView.ADOPTED ? "ACCEPTED" : "PROPOSED";
+  }
+
+  private static DecisionStatusView toContractStatus(String domainStatus) {
+    return switch (domainStatus) {
+      case "ACCEPTED" -> DecisionStatusView.ADOPTED;
+      case "PROPOSED" -> DecisionStatusView.PROPOSED;
+      // SUPERSEDED / REJECTED 는 계약의 두 값 어디에도 대응하지 않는다. 계약은 null 을 허용하므로
+      // 억지로 가장 가까운 값으로 접지 않고 "이 축약 view 로는 표현할 수 없음"을 null 로 알린다.
+      default -> null;
+    };
+  }
+}

src/adapter/outbound/persistence-jpa/src/main/java/dev/caskeleton/adapter/outbound/persistence/techlog/workingcopy/ProjectLinkStore.java

@@ -0,0 +1,81 @@
+package dev.caskeleton.adapter.outbound.persistence.techlog.workingcopy;
+
+import java.util.Optional;
+import java.util.UUID;
+import org.springframework.jdbc.core.simple.JdbcClient;
+
+/**
+ * 계약의 단일 {@code projectId}를 설계 스키마의 링크 테이블({@code project_document_link} / {@code
+ * project_question_link})에 옮긴다.
+ *
+ * <p>링크 테이블은 한 문서가 여러 프로젝트에 붙는 것을 허용하지만 Studio 편집기는 프로젝트 하나만 다룬다. Studio가 소유하는 것은 {@code PRIMARY}
+ * 링크 하나뿐이며, {@code RELATED} 링크는 건드리지 않는다 — 그건 다른 화면의 데이터이고 Studio 저장이 지워도 되는 것이 아니다.
+ */
+final class ProjectLinkStore {
+
+  private static final String PRIMARY = "PRIMARY";
+
+  private final JdbcClient jdbcClient;
+
+  ProjectLinkStore(JdbcClient jdbcClient) {
+    this.jdbcClient = jdbcClient;
+  }
+
+  Optional<UUID> findPrimaryProjectForDocument(UUID documentId) {
+    return findPrimary("project_document_link", "document_id", documentId);
+  }
+
+  Optional<UUID> findPrimaryProjectForQuestion(UUID questionId) {
+    return findPrimary("project_question_link", "question_id", questionId);
+  }
+
+  void setPrimaryProjectForDocument(UUID documentId, UUID projectId) {
+    setPrimary("project_document_link", "document_id", documentId, projectId);
+  }
+
+  void setPrimaryProjectForQuestion(UUID questionId, UUID projectId) {
+    setPrimary("project_question_link", "question_id", questionId, projectId);
+  }
+
+  private Optional<UUID> findPrimary(String table, String column, UUID id) {
+    return jdbcClient
+        .sql(
+            "SELECT project_id FROM "
+                + table
+                + " WHERE "
+                + column
+                + " = :id AND relation_type = :type")
+        .param("id", id)
+        .param("type", PRIMARY)
+        .query(UUID.class)
+        .optional();
+  }
+
+  private void setPrimary(String table, String column, UUID id, UUID projectId) {
+    jdbcClient
+        .sql("DELETE FROM " + table + " WHERE " + column + " = :id AND relation_type = :type")
+        .param("id", id)
+        .param("type", PRIMARY)
+        .update();
+    if (projectId == null) {
+      return;
+    }
+    jdbcClient
+        .sql(
+            "INSERT INTO "
+                + table
+                + " (project_id, "
+                + column
+                + ", relation_type)"
+                + " VALUES (:projectId, :id, :type)"
+                // PK 는 (project_id, <column>) 이라 같은 쌍이 RELATED 로 이미 있으면 INSERT 가 깨진다.
+                // Studio 가 소유하는 것은 PRIMARY 이므로 그 경우 관계 종류를 올려준다.
+                + " ON CONFLICT (project_id, "
+                + column
+                + ") DO UPDATE SET relation_type = :type")
+        .param("projectId", projectId)
+        .param("id", id)
+        .param("type", PRIMARY)
+        .update();
+  }
+}

src/adapter/outbound/persistence-jpa/src/main/java/dev/caskeleton/adapter/outbound/persistence/techlog/workingcopy/QuestionWorkingCopyStore.java

@@ -0,0 +1,296 @@
+package dev.caskeleton.adapter.outbound.persistence.techlog.workingcopy;
+
+import static dev.caskeleton.adapter.outbound.persistence.techlog.workingcopy.StudioSqlSupport.instant;
+import static dev.caskeleton.adapter.outbound.persistence.techlog.workingcopy.StudioSqlSupport.orEmpty;
+import static dev.caskeleton.adapter.outbound.persistence.techlog.workingcopy.StudioSqlSupport.slugFromColumn;
+import static dev.caskeleton.adapter.outbound.persistence.techlog.workingcopy.StudioSqlSupport.slugToColumn;
+
+import dev.caskeleton.application.techlog.error.StudioError;
+import dev.caskeleton.application.techlog.error.StudioException;
+import dev.caskeleton.application.techlog.studio.model.OrderedTextView;
+import dev.caskeleton.application.techlog.studio.model.QuestionResolutionView;
+import dev.caskeleton.application.techlog.studio.model.QuestionStatusView;
+import dev.caskeleton.application.techlog.studio.model.RecordKind;
+import dev.caskeleton.application.techlog.studio.model.WorkingCopyBaseInput;
+import dev.caskeleton.application.techlog.studio.model.WorkingCopyInputView;
+import dev.caskeleton.application.techlog.studio.model.WorkingCopyView;
+import java.util.List;
+import java.util.Optional;
+import java.util.Set;
+import java.util.UUID;
+import java.util.function.Supplier;
+import org.springframework.jdbc.core.simple.JdbcClient;
+
+/**
+ * {@code QUESTION} 편집본 ({@code open_question} + {@code question_point}).
+ *
+ * <p>계약의 {@code questionStatus}는 Domain lifecycle의 축약 view다(ADR-003) — {@code OPEN}을 받았다고 Domain의
+ * {@code INVESTIGATING}/{@code PAUSED}를 덮어쓰지 않는다. 그렇게 하면 조사 이력이 사라진다.
+ */
+final class QuestionWorkingCopyStore {
+
+  /**
+   * 계약의 {@code QuestionResolution}에는 resolution_type이 없는데 {@code
+   * ck_question_resolution_consistency}는 RESOLVED에 그 값을 요구한다. Studio 편집으로 해결 처리된 질문은 "판단을 내렸다"로
+   * 기록한다 — 나머지 세 유형(가정 기각/질문 재정의/무의미해짐)은 secondary management 계약의 명시적 action이 소유한다.
+   */
+  private static final String DEFAULT_RESOLUTION_TYPE = "DECISION_MADE";
+
+  private final JdbcClient jdbcClient;
+  private final StudioRelationStore relations;
+  private final StudioJson json;
+  private final Supplier<UUID> idGenerator;
+  private final ProjectLinkStore projectLinks;
+
+  QuestionWorkingCopyStore(
+      JdbcClient jdbcClient,
+      StudioRelationStore relations,
+      StudioJson json,
+      Supplier<UUID> idGenerator,
+      ProjectLinkStore projectLinks) {
+    this.jdbcClient = jdbcClient;
+    this.relations = relations;
+    this.json = json;
+    this.idGenerator = idGenerator;
+    this.projectLinks = projectLinks;
+  }
+
+  Optional<WorkingCopyView> find(UUID id) {
+    return jdbcClient
+        .sql(
+            "SELECT id, version, updated_at, question, slug, summary, primary_topic_id,"
+                + " question_status, next_verification, options, resolution_summary,"
+                + " resolution_evidence_target_id, resolution_link_label"
+                + " FROM open_question WHERE id = :id")
+        .param("id", id)
+        .query(
+            (rs, rowNum) -> {
+              UUID questionId = rs.getObject("id", UUID.class);
+              WorkingCopyBaseInput base =
+                  new WorkingCopyBaseInput(
+                      RecordKind.QUESTION,
+                      rs.getString("question"),
+                      slugFromColumn(rs.getString("slug")),
+                      orEmpty(rs.getString("summary")),
+                      rs.getObject("primary_topic_id", UUID.class),
+                      projectLinks.findPrimaryProjectForQuestion(questionId).orElse(null),
+                      relations.findBySource(RecordKind.QUESTION, questionId));
+              String domainStatus = rs.getString("question_status");
+              return (WorkingCopyView)
+                  new WorkingCopyView.QuestionWorkingCopyView(
+                      questionId,
+                      rs.getLong("version"),
+                      instant(rs, "updated_at"),
+                      base,
+                      toContractStatus(domainStatus),
+                      points(questionId, "FACT"),
+                      points(questionId, "ASSUMPTION"),
+                      points(questionId, "UNKNOWN"),
+                      points(questionId, "CONSTRAINT"),
+                      json.optionsFromJson(rs.getString("options")),
+                      orEmpty(rs.getString("next_verification")),
+                      resolutionOf(
+                          domainStatus,
+                          rs.getString("resolution_summary"),
+                          rs.getObject("resolution_evidence_target_id", UUID.class),
+                          rs.getString("resolution_link_label")));
+            })
+        .optional();
+  }
+
+  UUID create(WorkingCopyInputView.QuestionInputView input, String principal) {
+    UUID id = idGenerator.get();
+    WorkingCopyBaseInput base = input.base();
+    boolean resolved = input.questionStatus() == QuestionStatusView.RESOLVED;
+    requireUsableResolution(input, resolved);
+
+    jdbcClient
+        .sql(
+            "INSERT INTO open_question (id, slug, question, summary, primary_topic_id,"
+                + " next_verification, options, question_status, resolution_type,"
+                + " resolution_summary, resolution_evidence_target_id, resolution_link_label,"
+                + " resolved_at, version, created_by, updated_by)"
+                + " VALUES (:id, :slug, :question, :summary, :topicId, :nextValidation,"
+                + " CAST(:options AS jsonb), :status, :resolutionType, :resolutionSummary,"
+                + " :evidenceTargetId, :linkLabel,"
+                // 해결 시각은 애플리케이션 시계가 아니라 DB 시계로 찍는다 — 같은 트랜잭션의
+                // 다른 타임스탬프(created_at/updated_at)와 기준이 같아야 순서가 뒤집히지 않는다.
+                + " CASE WHEN :resolved THEN now() ELSE NULL END, 1, :principal, :principal)")
+        .param("id", id)
+        .param("slug", slugToColumn(base.slug()))
+        .param("question", orEmpty(base.title()))
+        .param("summary", orEmpty(base.summary()))
+        .param("topicId", base.topicId())
+        .param("nextValidation", orEmpty(input.nextValidation()))
+        .param("options", json.optionsToJson(input.options()))
+        .param("status", resolved ? "RESOLVED" : "OPEN")
+        .param("resolutionType", resolved ? DEFAULT_RESOLUTION_TYPE : null)
+        .param("resolutionSummary", resolved ? input.resolution().summary() : null)
+        .param("evidenceTargetId", resolved ? input.resolution().evidenceTargetId() : null)
+        .param("linkLabel", resolved ? orEmpty(input.resolution().linkLabel()) : "")
+        .param("resolved", resolved)
+        .param("principal", principal)
+        .update();
+
+    replacePoints(id, input);
+    relations.replace(RecordKind.QUESTION, id, base.relations());
+    projectLinks.setPrimaryProjectForQuestion(id, base.projectId());
+    return id;
+  }
+
+  boolean save(
+      UUID id,
+      long expectedVersion,
+      WorkingCopyInputView.QuestionInputView input,
+      String principal) {
+    WorkingCopyBaseInput base = input.base();
+    String storedStatus =
+        jdbcClient
+            .sql("SELECT question_status FROM open_question WHERE id = :id")
+            .param("id", id)
+            .query(String.class)
+            .optional()
+            .orElse("OPEN");
+
+    boolean resolveNow =
+        input.questionStatus() == QuestionStatusView.RESOLVED && !"RESOLVED".equals(storedStatus);
+    requireUsableResolution(input, input.questionStatus() == QuestionStatusView.RESOLVED);
+
+    // ADR-003: 축약 상태가 Domain lifecycle 을 덮어쓰지 않는다. OPEN 계열 안에서의 값 변화는 무시하고,
+    // 이미 RESOLVED 인 질문을 OPEN 으로 되돌리는 것도 저장이 할 일이 아니다 — reopen 은 secondary
+    // management 계약의 명시적 action 이다.
+    String nextStatus = resolveNow ? "RESOLVED" : storedStatus;
+    boolean resolvedAfter = "RESOLVED".equals(nextStatus);
+
+    int updated =
+        jdbcClient
+            .sql(
+                "UPDATE open_question SET slug = :slug, question = :question, summary = :summary,"
+                    + " primary_topic_id = :topicId, next_verification = :nextValidation,"
+                    + " options = CAST(:options AS jsonb), question_status = :status,"
+                    + " resolution_type = CASE WHEN :resolved THEN"
+                    + "   COALESCE(resolution_type, :resolutionType) ELSE resolution_type END,"
+                    + " resolution_summary = CASE WHEN :resolved THEN :resolutionSummary"
+                    + "   ELSE resolution_summary END,"
+                    + " resolution_evidence_target_id = CASE WHEN :resolved THEN :evidenceTargetId"
+                    + "   ELSE resolution_evidence_target_id END,"
+                    + " resolution_link_label = CASE WHEN :resolved THEN :linkLabel"
+                    + "   ELSE resolution_link_label END,"
+                    + " resolved_at = CASE WHEN :resolved THEN COALESCE(resolved_at, now())"
+                    + "   ELSE resolved_at END,"
+                    + " version = version + 1, updated_at = now(), updated_by = :principal"
+                    + " WHERE id = :id AND version = :expectedVersion")
+            .param("slug", slugToColumn(base.slug()))
+            .param("question", orEmpty(base.title()))
+            .param("summary", orEmpty(base.summary()))
+            .param("topicId", base.topicId())
+            .param("nextValidation", orEmpty(input.nextValidation()))
+            .param("options", json.optionsToJson(input.options()))
+            .param("status", nextStatus)
+            .param("resolved", resolvedAfter)
+            .param("resolutionType", DEFAULT_RESOLUTION_TYPE)
+            .param("resolutionSummary", resolvedAfter ? input.resolution().summary() : null)
+            .param("evidenceTargetId", resolvedAfter ? input.resolution().evidenceTargetId() : null)
+            .param("linkLabel", resolvedAfter ? orEmpty(input.resolution().linkLabel()) : "")
+            .param("principal", principal)
+            .param("id", id)
+            .param("expectedVersion", expectedVersion)
+            .update();
+    if (updated == 0) {
+      return false;
+    }
+    replacePoints(id, input);
+    relations.replace(RecordKind.QUESTION, id, base.relations());
+    projectLinks.setPrimaryProjectForQuestion(id, base.projectId());
+    return true;
+  }
+
+  /**
+   * {@code RESOLVED}는 {@code ck_question_resolution_consistency}가 요약을 요구한다. 요약 없이 해결 처리된 질문은 "왜
+   * 끝났는지 모르는 종료"라 저장을 거부한다 — 여기서 거부하지 않으면 DB 제약 위반이 500으로 나가 클라이언트가 무엇이 잘못됐는지 알 수 없다.
+   */
+  private static void requireUsableResolution(
+      WorkingCopyInputView.QuestionInputView input, boolean resolved) {
+    if (!resolved) {
+      return;
+    }
+    QuestionResolutionView resolution = input.resolution();
+    if (resolution == null || resolution.summary() == null || resolution.summary().isBlank()) {
+      throw StudioException.of(
+          StudioError.REQUEST_VALIDATION_FAILED,
+          "document.resolution.summary is required when questionStatus is RESOLVED");
+    }
+  }
+
+  private static QuestionStatusView toContractStatus(String domainStatus) {
+    return "RESOLVED".equals(domainStatus) ? QuestionStatusView.RESOLVED : QuestionStatusView.OPEN;
+  }
+
+  private static QuestionResolutionView resolutionOf(
+      String domainStatus, String summary, UUID evidenceTargetId, String linkLabel) {
+    if (!"RESOLVED".equals(domainStatus)) {
+      return null;
+    }
+    return new QuestionResolutionView(orEmpty(summary), evidenceTargetId, orEmpty(linkLabel));
+  }
+
+  private List<OrderedTextView> points(UUID questionId, String pointKind) {
+    return jdbcClient
+        .sql(
+            "SELECT id, content, display_order FROM question_point"
+                + " WHERE question_id = :id AND point_kind = :kind ORDER BY display_order")
+        .param("id", questionId)
+        .param("kind", pointKind)
+        .query(
+            (rs, rowNum) ->
+                new OrderedTextView(
+                    rs.getObject("id", UUID.class),
+                    rs.getString("content"),
+                    rs.getInt("display_order")))
+        .list();
+  }
+
+  private void replacePoints(UUID questionId, WorkingCopyInputView.QuestionInputView input) {
+    // 이 질문이 지금 소유한 point id. 클라이언트가 보낸 id 중 여기 있는 것만 유지한다 — 남의 질문 것을
+    // 그대로 쓰면 PK 가 충돌하고, 매번 새로 부여하면 편집기의 줄 식별자가 저장마다 바뀐다.
+    Set<UUID> owned =
+        Set.copyOf(
+            jdbcClient
+                .sql("SELECT id FROM question_point WHERE question_id = :id")
+                .param("id", questionId)
+                .query(UUID.class)
+                .list());
+    jdbcClient
+        .sql("DELETE FROM question_point WHERE question_id = :id")
+        .param("id", questionId)
+        .update();
+    insertPoints(questionId, "FACT", input.facts(), owned);
+    insertPoints(questionId, "ASSUMPTION", input.assumptions(), owned);
+    insertPoints(questionId, "UNKNOWN", input.unknowns(), owned);
+    insertPoints(questionId, "CONSTRAINT", input.constraints(), owned);
+  }
+
+  private void insertPoints(
+      UUID questionId, String pointKind, List<OrderedTextView> items, Set<UUID> owned) {
+    int order = 0;
+    for (OrderedTextView item : items) {
+      // content 는 CHECK (length(trim(content)) > 0) 다. 빈 줄은 편집 중 흔한 상태이므로 거부하는 대신
+      // 저장하지 않는다 — 계약도 OrderedText.text 에 minLength 1 을 두어 빈 항목을 보내지 말라고 한다.
+      if (item.text() == null || item.text().isBlank()) {
+        continue;
+      }
+      jdbcClient
+          .sql(
+              "INSERT INTO question_point (id, question_id, point_kind, content, display_order)"
+                  + " VALUES (:id, :questionId, :kind, :content, :order)")
+          .param(
+              "id",
+              (item.id() != null && owned.contains(item.id())) ? item.id() : idGenerator.get())
+          .param("questionId", questionId)
+          .param("kind", pointKind)
+          .param("content", item.text())
+          .param("order", order++)
+          .update();
+    }
+  }
+}

src/adapter/outbound/persistence-jpa/src/main/java/dev/caskeleton/adapter/outbound/persistence/techlog/workingcopy/StudioJson.java

@@ -0,0 +1,131 @@
+package dev.caskeleton.adapter.outbound.persistence.techlog.workingcopy;
+
+import dev.caskeleton.application.techlog.studio.model.OrderedTextView;
+import dev.caskeleton.application.techlog.studio.model.QuestionOptionView;
+import dev.caskeleton.application.techlog.studio.model.ReferenceRuleView;
+import dev.caskeleton.shared.error.MappingException;
+import java.util.List;
+import java.util.UUID;
+import tools.jackson.core.JacksonException;
+import tools.jackson.databind.JsonNode;
+import tools.jackson.databind.ObjectMapper;
+import tools.jackson.databind.node.ArrayNode;
+import tools.jackson.databind.node.ObjectNode;
+
+/**
+ * 설계 스키마가 jsonb 배열로 정한 순서 있는 항목들을 읽고 쓴다.
+ *
+ * <p>Jackson의 자동 POJO 바인딩을 쓰지 않고 필드를 직접 읽고 쓴다. 이 값들은 <b>DB에 영속되는 형태</b>라 application record의 필드 이름이
+ * 바뀌면 이미 저장된 행을 읽지 못하게 된다 — 그 결합을 만들지 않으려고 컬럼 안의 key 이름을 여기서 명시적으로 고정한다.
+ */
+final class StudioJson {
+
+  private final ObjectMapper mapper;
+
+  StudioJson(ObjectMapper mapper) {
+    this.mapper = mapper;
+  }
+
+  String orderedTextToJson(List<OrderedTextView> items) {
+    ArrayNode array = mapper.createArrayNode();
+    for (OrderedTextView item : items) {
+      ObjectNode node = array.addObject();
+      node.put("id", item.id() == null ? null : item.id().toString());
+      node.put("text", item.text());
+      node.put("order", item.order());
+    }
+    return write(array);
+  }
+
+  List<OrderedTextView> orderedTextFromJson(String json) {
+    return read(json)
+        .valueStream()
+        .map(
+            node ->
+                new OrderedTextView(
+                    uuid(node, "id"), text(node, "text"), node.path("order").asInt(0)))
+        .sorted(java.util.Comparator.comparingInt(OrderedTextView::order))
+        .toList();
+  }
+
+  String rulesToJson(List<ReferenceRuleView> items) {
+    ArrayNode array = mapper.createArrayNode();
+    for (ReferenceRuleView item : items) {
+      ObjectNode node = array.addObject();
+      node.put("id", item.id() == null ? null : item.id().toString());
+      node.put("title", item.title());
+      node.put("body", item.body());
+      node.put("order", item.order());
+    }
+    return write(array);
+  }
+
+  List<ReferenceRuleView> rulesFromJson(String json) {
+    return read(json)
+        .valueStream()
+        .map(
+            node ->
+                new ReferenceRuleView(
+                    uuid(node, "id"),
+                    text(node, "title"),
+                    text(node, "body"),
+                    node.path("order").asInt(0)))
+        .sorted(java.util.Comparator.comparingInt(ReferenceRuleView::order))
+        .toList();
+  }
+
+  String optionsToJson(List<QuestionOptionView> items) {
+    ArrayNode array = mapper.createArrayNode();
+    for (QuestionOptionView item : items) {
+      ObjectNode node = array.addObject();
+      node.put("id", item.id() == null ? null : item.id().toString());
+      node.put("title", item.title());
+      node.put("description", item.description());
+      node.put("order", item.order());
+    }
+    return write(array);
+  }
+
+  List<QuestionOptionView> optionsFromJson(String json) {
+    return read(json)
+        .valueStream()
+        .map(
+            node ->
+                new QuestionOptionView(
+                    uuid(node, "id"),
+                    text(node, "title"),
+                    text(node, "description"),
+                    node.path("order").asInt(0)))
+        .sorted(java.util.Comparator.comparingInt(QuestionOptionView::order))
+        .toList();
+  }
+
+  private String write(ArrayNode array) {
+    try {
+      return mapper.writeValueAsString(array);
+    } catch (JacksonException e) {
+      throw new MappingException("failed to serialise a Studio jsonb column", e);
+    }
+  }
+
+  private JsonNode read(String json) {
+    if (json == null || json.isBlank()) {
+      return mapper.createArrayNode();
+    }
+    try {
+      JsonNode node = mapper.readTree(json);
+      return node.isArray() ? node : mapper.createArrayNode();
+    } catch (JacksonException e) {
+      throw new MappingException("failed to read a Studio jsonb column", e);
+    }
+  }
+
+  private static UUID uuid(JsonNode node, String field) {
+    String value = node.path(field).asString(null);
+    return (value == null || value.isBlank()) ? null : UUID.fromString(value);
+  }
+
+  private static String text(JsonNode node, String field) {
+    return node.path(field).asString("");
+  }
+}

src/adapter/outbound/persistence-jpa/src/main/java/dev/caskeleton/adapter/outbound/persistence/techlog/workingcopy/StudioRelationStore.java

@@ -0,0 +1,89 @@
+package dev.caskeleton.adapter.outbound.persistence.techlog.workingcopy;
+
+import dev.caskeleton.application.techlog.studio.model.RecordKind;
+import dev.caskeleton.application.techlog.studio.model.RelationView;
+import java.util.List;
+import java.util.Set;
+import java.util.UUID;
+import java.util.function.Supplier;
+import org.springframework.jdbc.core.simple.JdbcClient;
+
+/**
+ * 네 유형이 공유하는 편집용 관계({@code studio_relation})를 읽고 통째로 교체한다.
+ *
+ * <p>부분 갱신이 아니라 교체인 이유: 계약의 {@code relations}는 배열 전체가 편집 대상이고, 클라이언트가 보낸 배열이 곧 최종 상태다. 지운 줄을 알아내려고
+ * diff를 뜨면 순서 재배열과 삭제를 구분하지 못한다.
+ */
+final class StudioRelationStore {
+
+  private final JdbcClient jdbcClient;
+  private final Supplier<UUID> idGenerator;
+
+  StudioRelationStore(JdbcClient jdbcClient, Supplier<UUID> idGenerator) {
+    this.jdbcClient = jdbcClient;
+    this.idGenerator = idGenerator;
+  }
+
+  List<RelationView> findBySource(RecordKind kind, UUID sourceId) {
+    return jdbcClient
+        .sql(
+            "SELECT id, target_id, reason, display_order FROM studio_relation "
+                + "WHERE source_kind = :kind AND source_id = :sourceId ORDER BY display_order")
+        .param("kind", kind.name())
+        .param("sourceId", sourceId)
+        .query(
+            (rs, rowNum) ->
+                new RelationView(
+                    rs.getObject("id", UUID.class),
+                    rs.getObject("target_id", UUID.class),
+                    rs.getString("reason"),
+                    rs.getInt("display_order")))
+        .list();
+  }
+
+  void replace(RecordKind kind, UUID sourceId, List<RelationView> relations) {
+    // 이 source 가 지금 소유한 관계 id 집합. 클라이언트가 보낸 id 중 여기 있는 것만 유지한다.
+    Set<UUID> owned =
+        Set.copyOf(
+            jdbcClient
+                .sql(
+                    "SELECT id FROM studio_relation "
+                        + "WHERE source_kind = :kind AND source_id = :sourceId")
+                .param("kind", kind.name())
+                .param("sourceId", sourceId)
+                .query(UUID.class)
+                .list());
+
+    jdbcClient
+        .sql("DELETE FROM studio_relation WHERE source_kind = :kind AND source_id = :sourceId")
+        .param("kind", kind.name())
+        .param("sourceId", sourceId)
+        .update();
+
+    for (RelationView relation : relations) {
+      // 이 source 가 원래 갖고 있던 id 는 그대로 둔다 — 편집기가 줄을 식별하는 키라 매 저장마다 바뀌면
+      // 화면의 줄이 통째로 갈아엎어진 것처럼 보인다. 그 밖의 id(남의 문서 것이거나 클라이언트가 지어낸
+      // 것)는 신뢰하지 않고 새로 부여한다 — 그대로 쓰면 다른 문서의 관계 행과 PK 가 충돌한다.
+      UUID id =
+          (relation.id() != null && owned.contains(relation.id()))
+              ? relation.id()
+              : idGenerator.get();
+      jdbcClient
+          .sql(
+              "INSERT INTO studio_relation "
+                  + "(id, source_kind, source_id, target_id, reason, display_order) "
+                  + "VALUES (:id, :kind, :sourceId, :targetId, :reason, :order)")
+          .param("id", id)
+          .param("kind", kind.name())
+          .param("sourceId", sourceId)
+          .param("targetId", relation.targetId())
+          .param("reason", relation.reason() == null ? "" : relation.reason())
+          .param("order", relation.order())
+          .update();
+    }
+  }
+
+  void deleteBySource(RecordKind kind, UUID sourceId) {
+    replace(kind, sourceId, List.of());
+  }
+}

src/adapter/outbound/persistence-jpa/src/main/java/dev/caskeleton/adapter/outbound/persistence/techlog/workingcopy/StudioSqlSupport.java

@@ -0,0 +1,49 @@
+package dev.caskeleton.adapter.outbound.persistence.techlog.workingcopy;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Timestamp;
+import java.time.Instant;
+import java.time.LocalDate;
+import java.time.ZoneOffset;
+
+/** 계약 타입과 컬럼 타입 사이의 되풀이되는 변환. */
+final class StudioSqlSupport {
+
+  private StudioSqlSupport() {}
+
+  /**
+   * 계약의 빈 slug("아직 정하지 않음")를 NULL로 옮긴다. 빈 문자열을 그대로 넣으면 {@code ck_document_slug_non_blank} 계열 제약에
+   * 걸리고, 무엇보다 여러 초안이 같은 빈 slug를 갖는 순간 slug UNIQUE 제약이 두 번째 초안을 거부한다.
+   */
+  static String slugToColumn(String slug) {
+    return (slug == null || slug.isBlank()) ? null : slug;
+  }
+
+  /** 반대 방향. 계약은 slug가 null이 아니라 빈 문자열이어야 한다고 정한다. */
+  static String slugFromColumn(String slug) {
+    return slug == null ? "" : slug;
+  }
+
+  static String orEmpty(String value) {
+    return value == null ? "" : value;
+  }
+
+  /**
+   * 계약의 {@code format: date}를 {@code timestamptz} 컬럼에 담는다. 자정 UTC로 고정한다 — 저장 시각의 로컬 타임존을 쓰면 같은 날짜가
+   * 서버 위치에 따라 다른 순간이 되고, 다시 읽을 때 하루가 밀린다.
+   */
+  static Timestamp dateToTimestamp(LocalDate date) {
+    return date == null ? null : Timestamp.from(date.atStartOfDay(ZoneOffset.UTC).toInstant());
+  }
+
+  static LocalDate dateFromTimestamp(ResultSet rs, String column) throws SQLException {
+    Timestamp value = rs.getTimestamp(column);
+    return value == null ? null : value.toInstant().atZone(ZoneOffset.UTC).toLocalDate();
+  }
+
+  static Instant instant(ResultSet rs, String column) throws SQLException {
+    Timestamp value = rs.getTimestamp(column);
+    return value == null ? null : value.toInstant();
+  }
+}

src/adapter/outbound/persistence-jpa/src/main/resources/db/migration/postgresql/V8__techlog_studio_working_copy.sql

@@ -0,0 +1,92 @@
+-- Studio WorkingCopy 계약(studio-v1.yaml)이 요구하는 편집 필드를 네 source aggregate에 채운다.
+--
+-- 배경: V7(= 설계 패키지 database/V1__init.sql)의 물리 스키마는 유형마다 다른 모델을 갖는데,
+-- Studio 계약은 네 유형을 공통 base(WorkingCopyInputBase) + 유형별 확장이라는 하나의 편집
+-- 흐름으로 다룬다. 그 공통 base와 유형별 필드 중 V7에 대응 컬럼이 없는 것만 여기서 채운다.
+-- 계약에 없는 V7 컬럼(environment_items, alternatives_markdown, freshness_status 등)은
+-- 건드리지 않는다 — 설계 패키지의 정본 스키마이고 public-v1 구현이 쓸 수 있다.
+--
+-- ADR-003과 충돌하지 않는다. ADR-003이 금지한 것은 네 Aggregate를 하나의 범용
+-- `working_copy` 테이블 + 통짜 JSON으로 뭉개는 것이다. 여기서는 각 Aggregate가 자기
+-- 테이블을 그대로 소유한 채 필요한 컬럼만 얻는다.
+
+-- ── 공통 base ───────────────────────────────────────────────────────────────
+-- 계약 WorkingCopyInputBase.summary (maxLength 300). open_question.summary(varchar 600)과
+-- project_decision(아래)에는 각각 대응 컬럼이 있거나 새로 만든다.
+ALTER TABLE document ADD COLUMN summary varchar(300) NOT NULL DEFAULT '';
+
+-- ── CASE ────────────────────────────────────────────────────────────────────
+-- 계약의 problem/conclusion은 maxLength 100000인 본문이다. V7의 *_summary는 varchar(600)이라
+-- 그대로 쓰면 잘린다 — text로 넓힌다(폭을 늘리는 변경이라 기존 행에 무손실).
+ALTER TABLE case_detail ALTER COLUMN problem_summary TYPE text;
+ALTER TABLE case_detail ALTER COLUMN conclusion_summary TYPE text;
+-- environment_items(jsonb 배열)는 계약의 environment(단일 문자열)와 다른 모양이다.
+-- 계약 쪽을 담을 컬럼을 따로 둔다. 기존 컬럼은 그대로 남긴다.
+ALTER TABLE case_detail ADD COLUMN environment text NOT NULL DEFAULT '';
+ALTER TABLE case_detail ADD COLUMN reproduction text NOT NULL DEFAULT '';
+
+-- ── REFERENCE ───────────────────────────────────────────────────────────────
+ALTER TABLE reference_detail ALTER COLUMN scope_summary TYPE text;
+-- rules[] = ReferenceRule{id,title,body,order}, examples[] = OrderedText{id,text,order}.
+-- applyWhen[]/exceptions[]는 기존 applies_to/excluded_scope를 그대로 쓴다.
+ALTER TABLE reference_detail ADD COLUMN rules jsonb NOT NULL DEFAULT '[]'::jsonb
+    CHECK (jsonb_typeof(rules) = 'array');
+ALTER TABLE reference_detail ADD COLUMN examples jsonb NOT NULL DEFAULT '[]'::jsonb
+    CHECK (jsonb_typeof(examples) = 'array');
+
+-- ── QUESTION ────────────────────────────────────────────────────────────────
+-- options[] = QuestionOption{id,title,description,order}.
+-- facts/assumptions/unknowns/constraints는 기존 question_point(point_kind)로 간다.
+ALTER TABLE open_question ADD COLUMN options jsonb NOT NULL DEFAULT '[]'::jsonb
+    CHECK (jsonb_typeof(options) = 'array');
+-- QuestionResolution{summary, evidenceTargetId, linkLabel} 중 summary만 V7에 있다.
+ALTER TABLE open_question ADD COLUMN resolution_evidence_target_id uuid;
+ALTER TABLE open_question ADD COLUMN resolution_link_label varchar(120) NOT NULL DEFAULT '';
+
+-- ── PROJECT_DECISION ────────────────────────────────────────────────────────
+-- 계약은 PROJECT_DECISION도 다른 셋과 같은 공통 base(title/slug/summary/topicId)로 편집한다.
+-- V7의 project_decision에는 statement/rationale/consequences만 있다.
+ALTER TABLE project_decision ADD COLUMN title varchar(120) NOT NULL DEFAULT '';
+ALTER TABLE project_decision ADD COLUMN slug varchar(180);
+ALTER TABLE project_decision ADD COLUMN summary varchar(300) NOT NULL DEFAULT '';
+ALTER TABLE project_decision ADD COLUMN primary_topic_id uuid REFERENCES topic(id);
+-- 계약 statement는 maxLength 100000이다. varchar(1000)이면 잘린다.
+ALTER TABLE project_decision ALTER COLUMN statement TYPE text;
+-- 계약은 PROJECT_DECISION 의 projectId 를 "게시 시점에 non-null, 저장 시점에는 강제하지 않음"으로
+-- 정한다(studio-v1.yaml WorkingCopyInputBase.projectId). V7 의 NOT NULL 은 그 초안 저장을
+-- 구조적으로 불가능하게 만든다 — 게시 필수 여부는 검증이 판단하도록 컬럼 제약을 푼다.
+ALTER TABLE project_decision ALTER COLUMN project_id DROP NOT NULL;
+ALTER TABLE project_decision ADD CONSTRAINT uq_project_decision_slug UNIQUE (slug);
+ALTER TABLE project_decision ADD CONSTRAINT ck_project_decision_slug_non_blank
+    CHECK (slug IS NULL OR length(trim(slug)) > 0);
+
+-- ── relations ───────────────────────────────────────────────────────────────
+-- 계약의 relations[]는 네 유형 공통 base에 있고 항목이 {id, targetId, reason, order}다.
+-- V7의 document_relation은 (source, target, relation_type) 복합 PK라 항목 자체의 id도
+-- reason도 없고 document끼리만 성립한다 — QUESTION/PROJECT_DECISION의 relations를 담을 수
+-- 없다. 그래서 Studio 편집용 관계는 전용 테이블에 둔다. document_relation은 설계의 공개
+-- 렌더링용 유형 관계로 그대로 남는다.
+--
+-- (source_kind, source_id) 다형 참조는 이 스키마가 studio_validation/studio_preview에서
+-- 이미 쓰는 방식과 같다. 다형 참조라 FK를 걸 수 없으므로 부모 삭제 시 정리는 application이
+-- 책임진다.
+--
+-- target_id가 nullable인 것은 계약(RelationInput.targetId: [string,"null"])을 따른 것이다 —
+-- 아직 대상을 고르지 않은 관계 줄도 저장할 수 있어야 한다. 게시 가능 여부는 검증이 판단한다.
+CREATE TABLE studio_relation (
+    id uuid PRIMARY KEY,
+    source_kind varchar(30) NOT NULL
+        CHECK (source_kind IN ('CASE', 'REFERENCE', 'QUESTION', 'PROJECT_DECISION')),
+    source_id uuid NOT NULL,
+    target_id uuid,
+    reason text NOT NULL DEFAULT '',
+    display_order integer NOT NULL CHECK (display_order >= 0),
+    created_at timestamptz NOT NULL DEFAULT now(),
+    updated_at timestamptz NOT NULL DEFAULT now(),
+    CONSTRAINT uq_studio_relation_order UNIQUE (source_kind, source_id, display_order),
+    CONSTRAINT ck_studio_relation_not_self CHECK (target_id IS NULL OR target_id <> source_id)
+);
+
+CREATE INDEX idx_studio_relation_source ON studio_relation (source_kind, source_id);
+CREATE INDEX idx_studio_relation_target ON studio_relation (target_id)
+    WHERE target_id IS NOT NULL;

src/adapter/outbound/persistence-jpa/src/postgresqlIntegrationTest/java/dev/caskeleton/adapter/outbound/persistence/techlog/studio/StudioPersistenceIntegrationTest.java

@@ -0,0 +1,716 @@
+package dev.caskeleton.adapter.outbound.persistence.techlog.studio;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import com.zaxxer.hikari.HikariConfig;
+import com.zaxxer.hikari.HikariDataSource;
+import dev.caskeleton.adapter.outbound.persistence.techlog.artifact.JdbcPreviewArtifactAdapter;
+import dev.caskeleton.adapter.outbound.persistence.techlog.artifact.JdbcValidationArtifactAdapter;
+import dev.caskeleton.adapter.outbound.persistence.techlog.query.JdbcDependencyRevisionAdapter;
+import dev.caskeleton.adapter.outbound.persistence.techlog.query.JdbcStudioDashboardQueryAdapter;
+import dev.caskeleton.adapter.outbound.persistence.techlog.query.JdbcStudioDependencyResolverAdapter;
+import dev.caskeleton.adapter.outbound.persistence.techlog.query.JdbcStudioDocumentQueryAdapter;
+import dev.caskeleton.adapter.outbound.persistence.techlog.studio.asset.JdbcAssetRepositoryAdapter;
+import dev.caskeleton.adapter.outbound.persistence.techlog.studio.publication.JdbcPublicationHistoryQueryAdapter;
+import dev.caskeleton.adapter.outbound.persistence.techlog.studio.publication.JdbcPublicationWriterAdapter;
+import dev.caskeleton.adapter.outbound.persistence.techlog.workingcopy.JdbcWorkingCopyRepositoryAdapter;
+import dev.caskeleton.application.techlog.studio.model.AssetKindView;
+import dev.caskeleton.application.techlog.studio.model.AssetManagementStatusView;
+import dev.caskeleton.application.techlog.studio.model.AssetView;
+import dev.caskeleton.application.techlog.studio.model.DecisionStatusView;
+import dev.caskeleton.application.techlog.studio.model.DocumentSort;
+import dev.caskeleton.application.techlog.studio.model.NextAction;
+import dev.caskeleton.application.techlog.studio.model.OrderedTextView;
+import dev.caskeleton.application.techlog.studio.model.PublicPreviewView;
+import dev.caskeleton.application.techlog.studio.model.PublicationAggregateStatus;
+import dev.caskeleton.application.techlog.studio.model.PublishResultView;
+import dev.caskeleton.application.techlog.studio.model.QuestionStatusView;
+import dev.caskeleton.application.techlog.studio.model.RecordKind;
+import dev.caskeleton.application.techlog.studio.model.ReferenceRuleView;
+import dev.caskeleton.application.techlog.studio.model.RelationView;
+import dev.caskeleton.application.techlog.studio.model.ValidationReportView;
+import dev.caskeleton.application.techlog.studio.model.ValidationStatus;
+import dev.caskeleton.application.techlog.studio.model.WorkingCopyBaseInput;
+import dev.caskeleton.application.techlog.studio.model.WorkingCopyInputView;
+import dev.caskeleton.application.techlog.studio.model.WorkingCopyView;
+import dev.caskeleton.application.techlog.studio.port.out.AssetRepositoryPort;
+import dev.caskeleton.application.techlog.studio.port.out.PublicationWriterPort;
+import dev.caskeleton.application.techlog.studio.port.out.StudioDependencyResolverPort;
+import dev.caskeleton.application.techlog.studio.query.ListAssetsQuery;
+import dev.caskeleton.application.techlog.studio.query.ListDocumentsQuery;
+import dev.caskeleton.application.techlog.studio.query.ListPublicationsQuery;
+import java.time.Instant;
+import java.time.LocalDate;
+import java.time.temporal.ChronoUnit;
+import java.util.List;
+import java.util.Optional;
+import java.util.Set;
+import java.util.UUID;
+import org.flywaydb.core.Flyway;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import org.springframework.jdbc.core.simple.JdbcClient;
+import org.testcontainers.DockerClientFactory;
+import org.testcontainers.postgresql.PostgreSQLContainer;
+import tools.jackson.databind.ObjectMapper;
+
+/**
+ * Studio 영속 경로 전체를 실제 PostgreSQL 위에서 돌린다.
+ *
+ * <p>이 테스트가 필요한 이유는 분명하다 — 이 저장소의 표준 {@code check} 는 Testcontainers 통합 테스트를 돌리지 않으므로, 여기 있는 SQL 은 이
+ * 테스트 없이는 <b>한 번도 실행되지 않은 채</b> 통과한다. 컴파일과 단위 테스트는 컬럼 이름 오타도, jsonb 캐스팅 누락도, 순환 FK 의 지연 검사도 검증하지
+ * 못한다.
+ *
+ * <p>{@code JdbcCatalogQueryAdapterTest} 와 같은 형제 패턴을 쓴다 — 이 모듈에는 {@code @SpringBootConfiguration} 이
+ * 없으므로 Testcontainers + 순수 Flyway + 직접 조립이다.
+ */
+class StudioPersistenceIntegrationTest {
+
+  private static final String IMAGE =
+      System.getProperty("jpa.evidence.postgresql.image", "postgres:16-alpine");
+
+  private static PostgreSQLContainer postgres;
+  private static HikariDataSource dataSource;
+  private static JdbcClient jdbcClient;
+
+  private static JdbcWorkingCopyRepositoryAdapter workingCopies;
+  private static JdbcStudioDocumentQueryAdapter documents;
+  private static JdbcStudioDependencyResolverAdapter dependencies;
+  private static JdbcDependencyRevisionAdapter dependencyRevisions;
+  private static JdbcValidationArtifactAdapter validations;
+  private static JdbcPreviewArtifactAdapter previews;
+  private static JdbcPublicationWriterAdapter publicationWriter;
+  private static JdbcPublicationHistoryQueryAdapter publicationHistory;
+  private static JdbcStudioDashboardQueryAdapter dashboard;
+  private static JdbcAssetRepositoryAdapter assets;
+  private static org.springframework.transaction.support.TransactionTemplate transactions;
+
+  private static UUID topicId;
+  private static UUID projectId;
+
+  @BeforeAll
+  static void migrateFreshDatabase() {
+    if (!DockerClientFactory.instance().isDockerAvailable()) {
+      throw new IllegalStateException(
+          "Docker is required for the Studio persistence integration test; skipping is forbidden");
+    }
+    postgres = new PostgreSQLContainer(IMAGE).withReuse(false);
+    postgres.start();
+
+    HikariConfig config = new HikariConfig();
+    config.setJdbcUrl(postgres.getJdbcUrl());
+    config.setUsername(postgres.getUsername());
+    config.setPassword(postgres.getPassword());
+    config.setMaximumPoolSize(5);
+    config.setMinimumIdle(1);
+    dataSource = new HikariDataSource(config);
+
+    Flyway.configure()
+        .dataSource(dataSource)
+        .locations("classpath:db/migration/postgresql")
+        .baselineOnMigrate(false)
+        .outOfOrder(false)
+        .load()
+        .migrate();
+
+    jdbcClient = JdbcClient.create(dataSource);
+    ObjectMapper objectMapper = new ObjectMapper();
+
+    workingCopies = new JdbcWorkingCopyRepositoryAdapter(jdbcClient, objectMapper);
+    documents = new JdbcStudioDocumentQueryAdapter(jdbcClient);
+    dependencies = new JdbcStudioDependencyResolverAdapter(jdbcClient);
+    dependencyRevisions = new JdbcDependencyRevisionAdapter(jdbcClient);
+    validations = new JdbcValidationArtifactAdapter(jdbcClient, objectMapper);
+    previews = new JdbcPreviewArtifactAdapter(jdbcClient);
+    publicationWriter = new JdbcPublicationWriterAdapter(jdbcClient, objectMapper);
+    publicationHistory = new JdbcPublicationHistoryQueryAdapter(jdbcClient);
+    dashboard = new JdbcStudioDashboardQueryAdapter(jdbcClient);
+    assets = new JdbcAssetRepositoryAdapter(jdbcClient);
+    // 게시는 프로덕션에서 TransactionPort.inWrite 안에서 돈다. 순환 FK 의 지연 검사가 성립하려면
+    // 트랜잭션이 반드시 있어야 하므로 테스트도 같은 조건에서 호출한다.
+    transactions =
+        new org.springframework.transaction.support.TransactionTemplate(
+            new org.springframework.jdbc.support.JdbcTransactionManager(dataSource));
+
+    topicId = UUID.randomUUID();
+    jdbcClient
+        .sql(
+            "INSERT INTO topic (id, name, normalized_name, slug, created_by, updated_by)"
+                + " VALUES (:id, 'Kafka', 'kafka', 'kafka', 'test', 'test')")
+        .param("id", topicId)
+        .update();
+
+    projectId = UUID.randomUUID();
+    jdbcClient
+        .sql(
+            "INSERT INTO project (id, slug, name, created_by, updated_by)"
+                + " VALUES (:id, 'tech-log', 'Tech Log', 'test', 'test')")
+        .param("id", projectId)
+        .update();
+  }
+
+  @AfterAll
+  static void stopPostgreSql() {
+    if (dataSource != null) {
+      dataSource.close();
+    }
+    if (postgres != null) {
+      postgres.stop();
+    }
+  }
+
+  private static WorkingCopyBaseInput base(RecordKind kind, String title, String slug) {
+    return new WorkingCopyBaseInput(kind, title, slug, "요약", topicId, projectId, List.of());
+  }
+
+  @Test
+  void v8AddsEveryColumnTheStudioContractNeeds() {
+    List<String> caseColumns = columnsOf("case_detail");
+    assertThat(caseColumns).contains("environment", "reproduction");
+
+    assertThat(columnsOf("reference_detail")).contains("rules", "examples");
+    assertThat(columnsOf("open_question"))
+        .contains("options", "resolution_evidence_target_id", "resolution_link_label");
+    assertThat(columnsOf("project_decision"))
+        .contains("title", "slug", "summary", "primary_topic_id");
+    assertThat(columnsOf("document")).contains("summary");
+    assertThat(columnsOf("studio_relation")).contains("source_kind", "source_id", "target_id");
+
+    // 계약이 허용한 "프로젝트 없는 결정 초안" 저장이 가능해야 한다.
+    assertThat(isNullable("project_decision", "project_id")).isTrue();
+    // 계약의 본문 길이는 100000 이라 varchar(600)/varchar(1000) 로는 담을 수 없다.
+    assertThat(typeOf("case_detail", "problem_summary")).isEqualTo("text");
+    assertThat(typeOf("project_decision", "statement")).isEqualTo("text");
+  }
+
+  @Test
+  void aCaseWorkingCopyRoundTripsThroughEveryColumnItTouches() {
+    WorkingCopyView created =
+        workingCopies.create(
+            new WorkingCopyInputView.CaseInputView(
+                base(RecordKind.CASE, "장애 사례", "outage-case"),
+                "문제",
+                "결론",
+                "환경",
+                "재현",
+                LocalDate.of(2026, 8, 1),
+                "본문 :::evidence key=\"x\""),
+            "tester");
+
+    assertThat(created.version()).as("계약의 version 은 minimum 1 이다").isEqualTo(1L);
+
+    WorkingCopyView loaded = workingCopies.find(created.id()).orElseThrow();
+    assertThat(loaded).isInstanceOf(WorkingCopyView.CaseWorkingCopyView.class);
+    WorkingCopyView.CaseWorkingCopyView value = (WorkingCopyView.CaseWorkingCopyView) loaded;
+    assertThat(value.problem()).isEqualTo("문제");
+    assertThat(value.reproduction()).isEqualTo("재현");
+    assertThat(value.lastVerifiedOn()).isEqualTo(LocalDate.of(2026, 8, 1));
+    assertThat(value.base().topicId()).isEqualTo(topicId);
+    assertThat(value.base().projectId()).as("프로젝트 링크 테이블 왕복").isEqualTo(projectId);
+
+    assertThat(workingCopies.findKind(created.id())).contains(RecordKind.CASE);
+  }
+
+  @Test
+  void savingWithTheWrongVersionChangesNothing() {
+    WorkingCopyView created =
+        workingCopies.create(
+            new WorkingCopyInputView.CaseInputView(
+                base(RecordKind.CASE, "낙관적 잠금", "optimistic-lock"), "", "", "", "", null, ""),
+            "tester");
+
+    Optional<WorkingCopyView> conflict =
+        workingCopies.save(
+            created.id(),
+            created.version() + 99,
+            new WorkingCopyInputView.CaseInputView(
+                base(RecordKind.CASE, "덮어쓰기 시도", "optimistic-lock"), "", "", "", "", null, ""),
+            "tester");
+    assertThat(conflict).isEmpty();
+    assertThat(workingCopies.find(created.id()).orElseThrow().base().title()).isEqualTo("낙관적 잠금");
+
+    WorkingCopyView saved =
+        workingCopies
+            .save(
+                created.id(),
+                created.version(),
+                new WorkingCopyInputView.CaseInputView(
+                    base(RecordKind.CASE, "정상 저장", "optimistic-lock"), "", "", "", "", null, ""),
+                "tester")
+            .orElseThrow();
+    assertThat(saved.version()).isEqualTo(created.version() + 1);
+    assertThat(saved.base().title()).isEqualTo("정상 저장");
+  }
+
+  @Test
+  void theOtherThreeKindsRoundTripThroughTheirOwnTables() {
+    WorkingCopyView reference =
+        workingCopies.create(
+            new WorkingCopyInputView.ReferenceInputView(
+                base(RecordKind.REFERENCE, "기준 문서", "reference-doc"),
+                "목적",
+                List.of(new ReferenceRuleView(UUID.randomUUID(), "규칙", "본문", 0)),
+                List.of(new OrderedTextView(UUID.randomUUID(), "적용", 0)),
+                List.of(),
+                List.of(new OrderedTextView(UUID.randomUUID(), "예시", 0)),
+                LocalDate.of(2026, 7, 1)),
+            "tester");
+    WorkingCopyView.ReferenceWorkingCopyView loadedReference =
+        (WorkingCopyView.ReferenceWorkingCopyView) workingCopies.find(reference.id()).orElseThrow();
+    assertThat(loadedReference.rules())
+        .singleElement()
+        .extracting(ReferenceRuleView::title)
+        .isEqualTo("규칙");
+    assertThat(loadedReference.examples())
+        .singleElement()
+        .extracting(OrderedTextView::text)
+        .isEqualTo("예시");
+
+    WorkingCopyView question =
+        workingCopies.create(
+            new WorkingCopyInputView.QuestionInputView(
+                base(RecordKind.QUESTION, "미해결 질문", "open-question"),
+                QuestionStatusView.OPEN,
+                List.of(new OrderedTextView(UUID.randomUUID(), "사실", 0)),
+                List.of(),
+                List.of(new OrderedTextView(UUID.randomUUID(), "모르는 것", 0)),
+                List.of(),
+                List.of(),
+                "다음 검증",
+                null),
+            "tester");
+    WorkingCopyView.QuestionWorkingCopyView loadedQuestion =
+        (WorkingCopyView.QuestionWorkingCopyView) workingCopies.find(question.id()).orElseThrow();
+    assertThat(loadedQuestion.facts())
+        .singleElement()
+        .extracting(OrderedTextView::text)
+        .isEqualTo("사실");
+    assertThat(loadedQuestion.unknowns()).hasSize(1);
+    assertThat(loadedQuestion.nextValidation()).isEqualTo("다음 검증");
+    assertThat(loadedQuestion.base().projectId()).isEqualTo(projectId);
+
+    WorkingCopyView decision =
+        workingCopies.create(
+            new WorkingCopyInputView.ProjectDecisionInputView(
+                base(RecordKind.PROJECT_DECISION, "결정", "a-decision"),
+                DecisionStatusView.ADOPTED,
+                LocalDate.of(2026, 6, 1),
+                "결정문",
+                "근거",
+                List.of(new OrderedTextView(UUID.randomUUID(), "결과", 0))),
+            "tester");
+    WorkingCopyView.ProjectDecisionWorkingCopyView loadedDecision =
+        (WorkingCopyView.ProjectDecisionWorkingCopyView)
+            workingCopies.find(decision.id()).orElseThrow();
+    // 계약의 ADOPTED 는 Domain 의 ACCEPTED 다(ADR-003).
+    assertThat(loadedDecision.decisionStatus()).isEqualTo(DecisionStatusView.ADOPTED);
+    assertThat(storedDecisionStatus(decision.id())).isEqualTo("ACCEPTED");
+    assertThat(loadedDecision.consequences()).hasSize(1);
+  }
+
+  @Test
+  void relationsSurviveAReplaceAndKeepTheirIdentity() {
+    WorkingCopyView target =
+        workingCopies.create(
+            new WorkingCopyInputView.CaseInputView(
+                base(RecordKind.CASE, "관계 대상", "relation-target"), "", "", "", "", null, ""),
+            "tester");
+
+    RelationView relation = new RelationView(null, target.id(), "왜 관련 있는지", 0);
+    WorkingCopyView source =
+        workingCopies.create(
+            new WorkingCopyInputView.CaseInputView(
+                new WorkingCopyBaseInput(
+                    RecordKind.CASE,
+                    "관계 원본",
+                    "relation-source",
+                    "요약",
+                    topicId,
+                    projectId,
+                    List.of(relation)),
+                "",
+                "",
+                "",
+                "",
+                null,
+                ""),
+            "tester");
+
+    List<RelationView> stored = workingCopies.find(source.id()).orElseThrow().base().relations();
+    assertThat(stored).singleElement().extracting(RelationView::reason).isEqualTo("왜 관련 있는지");
+    UUID relationId = stored.getFirst().id();
+    assertThat(relationId).isNotNull();
+
+    WorkingCopyView saved =
+        workingCopies
+            .save(
+                source.id(),
+                source.version(),
+                new WorkingCopyInputView.CaseInputView(
+                    new WorkingCopyBaseInput(
+                        RecordKind.CASE,
+                        "관계 원본",
+                        "relation-source",
+                        "요약",
+                        topicId,
+                        projectId,
+                        List.of(new RelationView(relationId, target.id(), "이유 수정", 0))),
+                    "",
+                    "",
+                    "",
+                    "",
+                    null,
+                    ""),
+                "tester")
+            .orElseThrow();
+    List<RelationView> afterSave = saved.base().relations();
+    assertThat(afterSave).singleElement().extracting(RelationView::reason).isEqualTo("이유 수정");
+    assertThat(afterSave.getFirst().id()).as("이 문서가 소유하던 관계 id 는 저장해도 유지된다").isEqualTo(relationId);
+  }
+
+  @Test
+  void theUnionQueryComputesDependencyRevisionAndNextAction() {
+    WorkingCopyView document =
+        workingCopies.create(
+            new WorkingCopyInputView.CaseInputView(
+                base(RecordKind.CASE, "목록 대상", "list-target"), "", "", "", "", null, ""),
+            "tester");
+
+    var page =
+        documents.list(
+            new ListDocumentsQuery(
+                "목록", RecordKind.CASE, null, null, projectId, DocumentSort.UPDATED_DESC, null, 20));
+    assertThat(page.items()).extracting(item -> item.id()).contains(document.id());
+    assertThat(page.items().getFirst().nextAction())
+        .as("검증한 적이 없으면 다음 행동은 VALIDATE 다")
+        .isEqualTo(NextAction.VALIDATE);
+
+    String revision = dependencyRevisions.revisionFor(RecordKind.CASE, document.id());
+    assertThat(revision).isNotBlank();
+    assertThat(dependencyRevisions.revisionFor(RecordKind.CASE, document.id()))
+        .as("같은 상태면 같은 값이어야 한다")
+        .isEqualTo(revision);
+
+    // 제목이 비면 검증할 의미가 없으므로 CONTINUE_EDITING 이다.
+    workingCopies.save(
+        document.id(),
+        document.version(),
+        new WorkingCopyInputView.CaseInputView(
+            base(RecordKind.CASE, "", "list-target"), "", "", "", "", null, ""),
+        "tester");
+    var blankTitlePage =
+        documents.list(
+            new ListDocumentsQuery(
+                null,
+                RecordKind.CASE,
+                null,
+                NextAction.CONTINUE_EDITING,
+                projectId,
+                DocumentSort.UPDATED_DESC,
+                null,
+                20));
+    assertThat(blankTitlePage.items()).extracting(item -> item.id()).contains(document.id());
+  }
+
+  @Test
+  void dependencyResolutionFindsTopicProjectRelationsAndSlugOwners() {
+    WorkingCopyView first =
+        workingCopies.create(
+            new WorkingCopyInputView.CaseInputView(
+                base(RecordKind.CASE, "슬러그 주인", "shared-slug"), "", "", "", "", null, ""),
+            "tester");
+    WorkingCopyView second =
+        workingCopies.create(
+            new WorkingCopyInputView.CaseInputView(
+                base(RecordKind.CASE, "슬러그 경쟁", ""), "", "", "", "", null, ""),
+            "tester");
+
+    StudioDependencyResolverPort.Resolved resolved =
+        dependencies.resolve(workingCopies.find(first.id()).orElseThrow(), Set.of());
+    assertThat(resolved.topic()).isNotNull();
+    assertThat(resolved.topic().publicPath()).isEqualTo("/topics/kafka");
+    assertThat(resolved.project().publicPath()).isEqualTo("/projects/tech-log");
+    assertThat(resolved.publicPath()).isEqualTo("/cases/shared-slug");
+    assertThat(resolved.topicMissing()).isFalse();
+    assertThat(resolved.slugOwnerId()).as("자기 자신은 slug 충돌이 아니다").isNull();
+
+    // 빈 slug 는 NULL 로 저장되므로 UNIQUE 제약을 여러 초안이 함께 지날 수 있다.
+    assertThat(workingCopies.find(second.id()).orElseThrow().base().slug()).isEmpty();
+  }
+
+  @Test
+  void validationAndPreviewArtifactsPersistAndReadBack() {
+    WorkingCopyView document =
+        workingCopies.create(
+            new WorkingCopyInputView.CaseInputView(
+                base(RecordKind.CASE, "artifact", "artifact-case"), "문제", "결론", "", "", null, ""),
+            "tester");
+
+    Instant now = Instant.now().truncatedTo(ChronoUnit.MILLIS);
+    ValidationReportView report =
+        new ValidationReportView(
+            UUID.randomUUID(),
+            document.id(),
+            document.version(),
+            ValidationStatus.WARNINGS,
+            List.of(
+                new dev.caskeleton.application.techlog.studio.model.ValidationIssueView(
+                    "BODY_EMPTY",
+                    dev.caskeleton.application.techlog.studio.model.ValidationSeverity.WARNING,
+                    "/bodyMarkdown",
+                    "본문이 비어 있다")),
+            now,
+            now.plusSeconds(3600),
+            "rev-1");
+    validations.save(RecordKind.CASE, report, "tester");
+
+    ValidationReportView loaded = validations.findById(report.validationId()).orElseThrow();
+    assertThat(loaded.status()).isEqualTo(ValidationStatus.WARNINGS);
+    assertThat(loaded.issues())
+        .singleElement()
+        .extracting(issue -> issue.code())
+        .isEqualTo("BODY_EMPTY");
+    assertThat(validations.latestFor(RecordKind.CASE, document.id())).isPresent();
+
+    PublicPreviewView preview =
+        new PublicPreviewView(
+            UUID.randomUUID(),
+            document.id(),
+            document.version(),
+            report.validationId(),
+            "rev-1",
+            now,
+            now.plusSeconds(3600),
+            "{\"kind\":\"CASE\"}");
+    previews.save(RecordKind.CASE, preview, "tester");
+    // jsonb 컬럼은 PostgreSQL 이 정규화해 되돌려준다(공백·키 순서가 입력과 같지 않다). 계약 DTO 로
+    // 다시 파싱해 쓰는 값이라 의미는 보존되지만, 바이트 동일성을 기대하면 안 된다.
+    String storedRenderModel =
+        previews.findById(preview.previewId()).orElseThrow().renderModelJson();
+    assertThat(new ObjectMapper().readTree(storedRenderModel).path("kind").asString(""))
+        .isEqualTo("CASE");
+  }
+
+  @Test
+  void publishWritesTheWholeAggregateAndUnpublishWithdrawsIt() {
+    WorkingCopyView document =
+        workingCopies.create(
+            new WorkingCopyInputView.CaseInputView(
+                base(RecordKind.CASE, "게시 대상", "publish-target"), "문제", "결론", "", "", null, "본문"),
+            "tester");
+
+    PublishResultView published =
+        transactions.execute(
+            status ->
+                publicationWriter.publish(
+                    new PublicationWriterPort.PublishRequest(
+                        RecordKind.CASE,
+                        document.id(),
+                        document.version(),
+                        "게시 대상",
+                        "요약",
+                        topicId,
+                        projectId,
+                        "/cases/publish-target",
+                        null,
+                        "{\"kind\":\"CASE\"}",
+                        "본문 평문",
+                        List.of(),
+                        "1",
+                        "1",
+                        "idem-1",
+                        "tester")));
+
+    assertThat(published.publication().status()).isEqualTo(PublicationAggregateStatus.PUBLISHED);
+    assertThat(published.publication().publicationRevision())
+        .as("첫 게시의 revision 은 1 이다 — INSERT 가 넣은 값을 UPDATE 가 또 올리면 안 된다")
+        .isEqualTo(1L);
+    assertThat(published.event().snapshotAvailable()).isTrue();
+
+    // 순환 FK(publication.latest_event_id <-> publication_event)가 지연 검사로 통과해야 한다.
+    assertThat(published.publication().latestEventId())
+        .isEqualTo(published.event().publicationEventId());
+
+    assertThat(count("public_resource_projection", "resource_id", document.id())).isEqualTo(1);
+    assertThat(count("public_route", "resource_id", document.id())).isEqualTo(1);
+    assertThat(
+            jdbcClient
+                .sql("SELECT workflow_status FROM document WHERE id = :id")
+                .param("id", document.id())
+                .query(String.class)
+                .single())
+        .isEqualTo("PUBLISHED");
+
+    // 재게시는 REPUBLISHED 이벤트와 revision 증가를 만든다.
+    PublishResultView republished =
+        transactions.execute(
+            status ->
+                publicationWriter.publish(
+                    new PublicationWriterPort.PublishRequest(
+                        RecordKind.CASE,
+                        document.id(),
+                        document.version(),
+                        "게시 대상",
+                        "요약",
+                        topicId,
+                        projectId,
+                        "/cases/publish-target",
+                        null,
+                        "{\"kind\":\"CASE\"}",
+                        "본문 평문",
+                        List.of(),
+                        "1",
+                        "1",
+                        "idem-2",
+                        "tester")));
+    assertThat(republished.event().type())
+        .isEqualTo(
+            dev.caskeleton.application.techlog.studio.model.PublicationEventTypeView.REPUBLISHED);
+    assertThat(republished.publication().publicationRevision()).isEqualTo(2L);
+
+    var page = publicationHistory.list(new ListPublicationsQuery(null, null, null, 20));
+    assertThat(page.items()).isNotEmpty();
+    assertThat(page.items().getFirst().document()).isNotNull();
+    assertThat(publicationHistory.findSnapshot(published.event().publicationEventId())).isPresent();
+
+    PublishResultView withdrawn =
+        transactions.execute(
+            status ->
+                publicationWriter.unpublish(
+                    new PublicationWriterPort.UnpublishRequest(
+                        published.publication().publicationId(),
+                        RecordKind.CASE,
+                        document.id(),
+                        republished.publication().publicationRevision(),
+                        "tester")));
+    assertThat(withdrawn.publication().status()).isEqualTo(PublicationAggregateStatus.UNPUBLISHED);
+    assertThat(withdrawn.event().sourcePublishedEventId())
+        .as("UNPUBLISHED 이벤트는 마지막 공개 Snapshot 을 반드시 참조한다")
+        .isNotNull();
+    assertThat(
+            jdbcClient
+                .sql(
+                    "SELECT publication_state FROM public_resource_projection"
+                        + " WHERE resource_id = :id")
+                .param("id", document.id())
+                .query(String.class)
+                .single())
+        .isEqualTo("WITHDRAWN");
+    assertThat(count("public_route", "resource_id", document.id()))
+        .as("게시 취소는 주소를 지우지 않는다 — 지우면 공개된 링크가 끊긴다")
+        .isEqualTo(1);
+  }
+
+  @Test
+  void dashboardCountsUseTheSameProjectionAsTheList() {
+    var totals = dashboard.totals();
+    assertThat(totals.documents()).isPositive();
+    assertThat(dashboard.topByNextAction(List.of(NextAction.VALIDATE), 5)).isNotNull();
+  }
+
+  @Test
+  void assetsRoundTripAndReportTheirUsage() {
+    UUID assetId = UUID.randomUUID();
+    AssetView created =
+        assets.create(
+            new AssetRepositoryPort.NewAsset(
+                assetId,
+                "diagram-key",
+                AssetKindView.DIAGRAM,
+                "image/png",
+                "techlog/assets/" + assetId,
+                "diagram.png",
+                1024L,
+                800,
+                600,
+                "a".repeat(64),
+                "설명",
+                false,
+                AssetManagementStatusView.READY),
+            "tester");
+
+    assertThat(created.version()).as("계약의 Asset.version 은 minimum 1 이다").isEqualTo(1L);
+    assertThat(created.publicPath()).isEqualTo("/media/" + assetId);
+    assertThat(created.usageCount()).isZero();
+
+    var page =
+        assets.list(new ListAssetsQuery("diagram", AssetKindView.DIAGRAM, null, null, null, 20));
+    assertThat(page.items()).extracting(AssetView::id).contains(assetId);
+
+    AssetView updated =
+        assets
+            .update(
+                assetId,
+                created.version(),
+                null,
+                null,
+                true,
+                Boolean.TRUE,
+                AssetManagementStatusView.ARCHIVED,
+                "tester")
+            .orElseThrow();
+    assertThat(updated.altText()).as("altTextProvided=true 는 null 로 지우는 것을 뜻한다").isNull();
+    assertThat(updated.decorative()).isTrue();
+    assertThat(updated.managementStatus()).isEqualTo(AssetManagementStatusView.ARCHIVED);
+    assertThat(updated.version()).isEqualTo(2L);
+
+    assertThat(assets.update(assetId, 99L, null, null, false, null, null, "tester")).isEmpty();
+    assertThat(assets.findObjectKey(assetId)).contains("techlog/assets/" + assetId);
+
+    var detail = assets.findDetail(assetId).orElseThrow();
+    assertThat(detail.hasPublicationHistory()).isFalse();
+    assertThat(detail.usages()).isEmpty();
+
+    assets.delete(assetId);
+    assertThat(assets.find(assetId)).isEmpty();
+  }
+
+  private static List<String> columnsOf(String table) {
+    return jdbcClient
+        .sql("SELECT column_name FROM information_schema.columns WHERE table_name = :table")
+        .param("table", table)
+        .query(String.class)
+        .list();
+  }
+
+  private static boolean isNullable(String table, String column) {
+    return "YES"
+        .equals(
+            jdbcClient
+                .sql(
+                    "SELECT is_nullable FROM information_schema.columns"
+                        + " WHERE table_name = :table AND column_name = :column")
+                .param("table", table)
+                .param("column", column)
+                .query(String.class)
+                .single());
+  }
+
+  private static String typeOf(String table, String column) {
+    return jdbcClient
+        .sql(
+            "SELECT data_type FROM information_schema.columns"
+                + " WHERE table_name = :table AND column_name = :column")
+        .param("table", table)
+        .param("column", column)
+        .query(String.class)
+        .single();
+  }
+
+  private static String storedDecisionStatus(UUID id) {
+    return jdbcClient
+        .sql("SELECT decision_status FROM project_decision WHERE id = :id")
+        .param("id", id)
+        .query(String.class)
+        .single();
+  }
+
+  private static int count(String table, String column, UUID id) {
+    return jdbcClient
+        .sql("SELECT count(*) FROM " + table + " WHERE " + column + " = :id")
+        .param("id", id)
+        .query(Integer.class)
+        .single();
+  }
+}

src/app-bootstrap/gradle.lockfile

@@ -210,6 +210,10 @@ org.codehaus.plexus:plexus-classworlds:2.6.0=checkstyle
 org.codehaus.plexus:plexus-component-annotations:2.1.0=checkstyle
 org.codehaus.plexus:plexus-container-default:2.1.0=checkstyle
 org.codehaus.plexus:plexus-utils:3.3.0=checkstyle
+org.commonmark:commonmark-ext-autolink:0.21.0=functionalTestRuntimeClasspath,productionRuntimeClasspath,runtimeClasspath,sampleOffTestRuntimeClasspath,testRuntimeClasspath
+org.commonmark:commonmark-ext-gfm-strikethrough:0.21.0=functionalTestRuntimeClasspath,productionRuntimeClasspath,runtimeClasspath,sampleOffTestRuntimeClasspath,testRuntimeClasspath
+org.commonmark:commonmark-ext-gfm-tables:0.21.0=functionalTestRuntimeClasspath,productionRuntimeClasspath,runtimeClasspath,sampleOffTestRuntimeClasspath,testRuntimeClasspath
+org.commonmark:commonmark:0.21.0=functionalTestRuntimeClasspath,productionRuntimeClasspath,runtimeClasspath,sampleOffTestRuntimeClasspath,testRuntimeClasspath
 org.dom4j:dom4j:2.2.0=spotbugs
 org.eclipse.angus:angus-activation:2.0.3=productionRuntimeClasspath,runtimeClasspath,sampleOffTestRuntimeClasspath,testRuntimeClasspath
 org.eclipse.jetty.compression:jetty-compression-common:12.1.4=productionRuntimeClasspath,runtimeClasspath,sampleOffTestRuntimeClasspath,testRuntimeClasspath
@@ -248,6 +252,7 @@ org.junit:junit-bom:6.1.0=spotbugs
 org.latencyutils:LatencyUtils:2.0.3=productionRuntimeClasspath,runtimeClasspath,sampleOffTestRuntimeClasspath,testRuntimeClasspath
 org.mockito:mockito-core:5.20.0=functionalTestCompileClasspath,functionalTestRuntimeClasspath,mockitoAgent,sampleOffTestCompileClasspath,sampleOffTestRuntimeClasspath,testCompileClasspath,testRuntimeClasspath
 org.mockito:mockito-junit-jupiter:5.20.0=functionalTestCompileClasspath,functionalTestRuntimeClasspath,sampleOffTestCompileClasspath,sampleOffTestRuntimeClasspath,testCompileClasspath,testRuntimeClasspath
+org.nibor.autolink:autolink:0.10.0=functionalTestRuntimeClasspath,productionRuntimeClasspath,runtimeClasspath,sampleOffTestRuntimeClasspath,testRuntimeClasspath
 org.objenesis:objenesis:3.3=functionalTestRuntimeClasspath,sampleOffTestRuntimeClasspath,testRuntimeClasspath
 org.openapitools:jackson-databind-nullable:0.2.6=functionalTestRuntimeClasspath,productionRuntimeClasspath,runtimeClasspath,sampleOffTestRuntimeClasspath,testRuntimeClasspath
 org.opentest4j:opentest4j:1.3.0=conditionalTransportTestCompileClasspath,conditionalTransportTestRuntimeClasspath,functionalTestCompileClasspath,functionalTestRuntimeClasspath,sampleOffTestCompileClasspath,sampleOffTestRuntimeClasspath,testCompileClasspath,testRuntimeClasspath

src/app-bootstrap/src/functionalTest/java/dev/caskeleton/bootstrap/contract/StudioContractDriftTest.java

@@ -200,6 +200,39 @@ class StudioContractDriftTest {
           .isNotEmpty();
     }
 
+    /**
+     * 반대 방향 — 계약의 operation 이 전부 published 표면에 있는가.
+     *
+     * <p>슬라이스 2~5 가 끝나 19개 operation 이 모두 구현됐으므로 이제 "published ⊆ 계약" 한 방향만으로는 부족하다. 그 방향은
+     * <b>사라진</b> operation 을 잡지 못한다 — 컨트롤러를 지우거나 매핑을 잘못 옮겨도 남은 것들이 계약과 맞으면 통과한다. 양방향이 되어야 게이트가
+     * 완성된다.
+     *
+     * <p>새 operation 을 계약에 추가하면 이 테스트가 먼저 빨간불이 된다. 그게 의도다 — 계약이 약속한 것을 서버가 아직 제공하지 않는다는 사실이 배포 전에
+     * 드러나야 한다.
+     */
+    @Test
+    void everyContractOperationIsPublished() throws Exception {
+      JsonNode contract = readContract();
+      JsonNode published = readPublishedApiDocs();
+
+      List<String> missing = new ArrayList<>();
+      for (Map.Entry<String, JsonNode> path : contract.path("paths").properties()) {
+        for (Map.Entry<String, JsonNode> method : path.getValue().properties()) {
+          JsonNode operationId = method.getValue().path("operationId");
+          if (operationId.isMissingNode()) {
+            continue;
+          }
+          JsonNode publishedOperation =
+              published.path("paths").path(path.getKey()).path(method.getKey());
+          if (publishedOperation.isMissingNode()
+              || !operationId.asText().equals(publishedOperation.path("operationId").asText(""))) {
+            missing.add(operationId.asText() + " (" + method.getKey() + " " + path.getKey() + ")");
+          }
+        }
+      }
+      assertThat(missing).as("계약이 약속했는데 서버가 제공하지 않는 operation").isEmpty();
+    }
+
     /**
      * SnakeYaml(이미 {@code StudioErrorRegistryTest}가 error-codes.yaml에 쓰는 라이브러리)로 읽은 뒤 {@code
      * ObjectMapper#valueToTree}로 {@link JsonNode}로 옮긴다 — {@code jackson-dataformat-yaml}을 새 컴파일
@@ -245,7 +278,7 @@ class StudioContractDriftTest {
     @SpringBootConfiguration
     @EnableAutoConfiguration(exclude = SecurityAutoConfiguration.class)
     @ComponentScan("dev.caskeleton.adapter.inbound.web.techlog")
-    @Import(PresentationWebConfig.class)
+    @Import({PresentationWebConfig.class, StudioContractDriftTest.StudioDocumentTestBeans.class})
     static class ContractSurfaceApp {
 
       /**
@@ -301,7 +334,11 @@ class StudioContractDriftTest {
     @SpringBootConfiguration
     @EnableAutoConfiguration(exclude = SecurityAutoConfiguration.class)
     @ComponentScan("dev.caskeleton.adapter.inbound.web.techlog")
-    @Import({EnvelopeBodyAdvice.class, PresentationWebConfig.class})
+    @Import({
+      EnvelopeBodyAdvice.class,
+      PresentationWebConfig.class,
+      StudioContractDriftTest.StudioDocumentTestBeans.class
+    })
     static class EnvelopeApp {
 
       /**
@@ -350,6 +387,482 @@ class StudioContractDriftTest {
     return new ListCatalogUseCase(new StubCatalogQueryPort(), new PassThroughTransactionPort());
   }
 
+  /**
+   * 슬라이스 2의 {@code StudioDocumentController}가 {@code @ComponentScan}에 걸리면서 필요해진 협력자들.
+   *
+   * <p>이 비용은 이 게이트가 "패키지를 스캔한다"는 성질의 뒷면이다 — 새 컨트롤러가 자동으로 감시 대상이 되는 대신, 그 컨트롤러의 협력자를 여기에 채워야 컨텍스트가
+   * 뜬다. 채우지 않으면 게이트가 통과가 아니라 실패로 알려준다.
+   *
+   * <p>포트 구현은 전부 빈 stub 이다. 첫 번째 테스트는 springdoc 리플렉션이라 컨트롤러 메서드를 아예 호출하지 않고, 두 번째 테스트는 catalog
+   * 엔드포인트만 두드린다.
+   */
+  @org.springframework.context.annotation.Configuration(proxyBeanMethods = false)
+  static class StudioDocumentTestBeans {
+
+    @Bean
+    java.time.Clock studioTestClock() {
+      return java.time.Clock.systemUTC();
+    }
+
+    @Bean
+    dev.caskeleton.adapter.inbound.web.techlog.studio.support.StudioSettings studioSettings() {
+      return new dev.caskeleton.adapter.inbound.web.techlog.studio.support.StudioSettings(
+          "functional-test-cursor-signing-key", null, null);
+    }
+
+    @Bean
+    dev.caskeleton.adapter.inbound.web.idempotency.IdempotencyKeySupport idempotencyKeySupport(
+        tools.jackson.databind.ObjectMapper objectMapper) {
+      return new dev.caskeleton.adapter.inbound.web.idempotency.IdempotencyKeySupport(objectMapper);
+    }
+
+    @Bean
+    dev.caskeleton.application.techlog.studio.service.ListStudioDocumentsUseCase
+        listStudioDocumentsUseCase() {
+      return new dev.caskeleton.application.techlog.studio.service.ListStudioDocumentsUseCase(
+          query ->
+              new dev.caskeleton.application.techlog.studio.model.DocumentPageView(List.of(), null),
+          new PassThroughTransactionPort());
+    }
+
+    @Bean
+    dev.caskeleton.application.techlog.studio.service.CreateStudioDocumentUseCase
+        createStudioDocumentUseCase() {
+      return new dev.caskeleton.application.techlog.studio.service.CreateStudioDocumentUseCase(
+          new StubWorkingCopyRepositoryPort(), new PassThroughTransactionPort());
+    }
+
+    @Bean
+    dev.caskeleton.application.techlog.studio.service.GetStudioDocumentUseCase
+        getStudioDocumentUseCase() {
+      return new dev.caskeleton.application.techlog.studio.service.GetStudioDocumentUseCase(
+          new StubWorkingCopyRepositoryPort(), assembler(), new PassThroughTransactionPort());
+    }
+
+    @Bean
+    dev.caskeleton.application.techlog.studio.service.SaveStudioDocumentUseCase
+        saveStudioDocumentUseCase() {
+      return new dev.caskeleton.application.techlog.studio.service.SaveStudioDocumentUseCase(
+          new StubWorkingCopyRepositoryPort(), assembler(), new PassThroughTransactionPort());
+    }
+
+    @Bean
+    dev.caskeleton.application.techlog.studio.service.StudioDocumentLoader studioDocumentLoader() {
+      return new dev.caskeleton.application.techlog.studio.service.StudioDocumentLoader(
+          new StubWorkingCopyRepositoryPort());
+    }
+
+    @Bean
+    dev.caskeleton.application.techlog.studio.port.out.StudioDependencyResolverPort
+        studioDependencyResolverPort() {
+      return (document, keys) ->
+          new dev.caskeleton.application.techlog.studio.port.out.StudioDependencyResolverPort
+              .Resolved(
+              null,
+              false,
+              null,
+              false,
+              List.of(),
+              List.of(),
+              java.util.Map.of(),
+              java.util.Map.of(),
+              null,
+              null,
+              null);
+    }
+
+    @Bean
+    dev.caskeleton.application.techlog.studio.service.ValidateStudioDocumentUseCase
+        validateStudioDocumentUseCase(
+            dev.caskeleton.application.techlog.studio.service.StudioDocumentLoader documents,
+            dev.caskeleton.application.techlog.studio.port.out.StudioDependencyResolverPort
+                dependencies,
+            dev.caskeleton.application.techlog.studio.port.out.ContentAnalyzerPort
+                contentAnalyzer) {
+      return new dev.caskeleton.application.techlog.studio.service.ValidateStudioDocumentUseCase(
+          documents,
+          dependencies,
+          contentAnalyzer,
+          (kind, id) -> "test-dependency-revision",
+          new StubValidationArtifactPort(),
+          new PassThroughTransactionPort(),
+          java.util.UUID::randomUUID,
+          java.time.Clock.systemUTC(),
+          java.time.Duration.ofHours(1));
+    }
+
+    @Bean
+    dev.caskeleton.application.techlog.studio.service.CreateStudioPreviewUseCase
+        createStudioPreviewUseCase(
+            dev.caskeleton.application.techlog.studio.service.StudioDocumentLoader documents,
+            dev.caskeleton.application.techlog.studio.port.out.StudioDependencyResolverPort
+                dependencies,
+            dev.caskeleton.application.techlog.studio.port.out.ContentAnalyzerPort contentAnalyzer,
+            dev.caskeleton.application.techlog.studio.port.out.RenderModelPort renderer) {
+      return new dev.caskeleton.application.techlog.studio.service.CreateStudioPreviewUseCase(
+          documents,
+          dependencies,
+          contentAnalyzer,
+          (kind, id) -> "test-dependency-revision",
+          new StubValidationArtifactPort(),
+          new StubPreviewArtifactPort(),
+          renderer,
+          new PassThroughTransactionPort(),
+          java.util.UUID::randomUUID,
+          java.time.Clock.systemUTC(),
+          java.time.Duration.ofHours(24));
+    }
+
+    @Bean
+    dev.caskeleton.application.techlog.studio.service.GetCurrentStudioPreviewUseCase
+        getCurrentStudioPreviewUseCase(
+            dev.caskeleton.application.techlog.studio.service.StudioDocumentLoader documents) {
+      return new dev.caskeleton.application.techlog.studio.service.GetCurrentStudioPreviewUseCase(
+          documents,
+          new StubPreviewArtifactPort(),
+          new StubValidationArtifactPort(),
+          (kind, id) -> "test-dependency-revision",
+          new PassThroughTransactionPort(),
+          java.time.Clock.systemUTC());
+    }
+
+    @Bean
+    dev.caskeleton.application.techlog.studio.port.out.PublicationHistoryQueryPort
+        publicationHistoryQueryPort() {
+      return new StubPublicationHistoryQueryPort();
+    }
+
+    @Bean
+    dev.caskeleton.application.techlog.studio.service.PublishStudioDocumentUseCase
+        publishStudioDocumentUseCase(
+            dev.caskeleton.application.techlog.studio.service.StudioDocumentLoader documents,
+            dev.caskeleton.application.techlog.studio.port.out.StudioDependencyResolverPort
+                dependencies,
+            dev.caskeleton.application.techlog.studio.port.out.ContentAnalyzerPort
+                contentAnalyzer) {
+      return new dev.caskeleton.application.techlog.studio.service.PublishStudioDocumentUseCase(
+          documents,
+          dependencies,
+          contentAnalyzer,
+          (kind, id) -> "test-dependency-revision",
+          new StubValidationArtifactPort(),
+          new StubPreviewArtifactPort(),
+          new StubPublicationWriterPort(),
+          new PassThroughTransactionPort(),
+          java.time.Clock.systemUTC());
+    }
+
+    @Bean
+    dev.caskeleton.application.techlog.studio.service.UnpublishStudioPublicationUseCase
+        unpublishStudioPublicationUseCase(
+            dev.caskeleton.application.techlog.studio.port.out.PublicationHistoryQueryPort history,
+            dev.caskeleton.application.techlog.studio.service.StudioDocumentLoader documents) {
+      return new dev.caskeleton.application.techlog.studio.service
+          .UnpublishStudioPublicationUseCase(
+          history, new StubPublicationWriterPort(), documents, new PassThroughTransactionPort());
+    }
+
+    @Bean
+    dev.caskeleton.application.techlog.studio.service.ListStudioPublicationsUseCase
+        listStudioPublicationsUseCase(
+            dev.caskeleton.application.techlog.studio.port.out.PublicationHistoryQueryPort
+                history) {
+      return new dev.caskeleton.application.techlog.studio.service.ListStudioPublicationsUseCase(
+          history, new PassThroughTransactionPort());
+    }
+
+    @Bean
+    dev.caskeleton.application.techlog.studio.service.GetStudioPublicationSnapshotUseCase
+        getStudioPublicationSnapshotUseCase(
+            dev.caskeleton.application.techlog.studio.port.out.PublicationHistoryQueryPort
+                history) {
+      return new dev.caskeleton.application.techlog.studio.service
+          .GetStudioPublicationSnapshotUseCase(history, new PassThroughTransactionPort());
+    }
+
+    @Bean
+    dev.caskeleton.application.techlog.studio.service.GetStudioDashboardUseCase
+        getStudioDashboardUseCase(
+            dev.caskeleton.application.techlog.studio.port.out.PublicationHistoryQueryPort
+                history) {
+      return new dev.caskeleton.application.techlog.studio.service.GetStudioDashboardUseCase(
+          new StubStudioDashboardQueryPort(), history, new PassThroughTransactionPort());
+    }
+
+    @Bean
+    dev.caskeleton.application.techlog.studio.port.out.AssetRepositoryPort assetRepositoryPort() {
+      return new StubAssetRepositoryPort();
+    }
+
+    @Bean
+    dev.caskeleton.application.techlog.studio.port.out.AssetBinaryStoragePort
+        assetBinaryStoragePort() {
+      return new dev.caskeleton.application.techlog.studio.port.out.AssetBinaryStoragePort() {
+        @Override
+        public String store(String objectKey, byte[] content, String mediaType) {
+          return objectKey;
+        }
+
+        @Override
+        public void delete(String objectKey) {
+          // 이 게이트는 바이너리를 다루지 않는다.
+        }
+      };
+    }
+
+    @Bean
+    dev.caskeleton.application.techlog.studio.service.ListStudioAssetsUseCase
+        listStudioAssetsUseCase(
+            dev.caskeleton.application.techlog.studio.port.out.AssetRepositoryPort assets) {
+      return new dev.caskeleton.application.techlog.studio.service.ListStudioAssetsUseCase(
+          assets, new PassThroughTransactionPort());
+    }
+
+    @Bean
+    dev.caskeleton.application.techlog.studio.service.UploadStudioAssetUseCase
+        uploadStudioAssetUseCase(
+            dev.caskeleton.application.techlog.studio.port.out.AssetRepositoryPort assets,
+            dev.caskeleton.application.techlog.studio.port.out.AssetBinaryStoragePort binaries) {
+      return new dev.caskeleton.application.techlog.studio.service.UploadStudioAssetUseCase(
+          assets, binaries, new PassThroughTransactionPort(), java.util.UUID::randomUUID);
+    }
+
+    @Bean
+    dev.caskeleton.application.techlog.studio.service.GetStudioAssetUseCase getStudioAssetUseCase(
+        dev.caskeleton.application.techlog.studio.port.out.AssetRepositoryPort assets) {
+      return new dev.caskeleton.application.techlog.studio.service.GetStudioAssetUseCase(
+          assets, new PassThroughTransactionPort());
+    }
+
+    @Bean
+    dev.caskeleton.application.techlog.studio.service.UpdateStudioAssetUseCase
+        updateStudioAssetUseCase(
+            dev.caskeleton.application.techlog.studio.port.out.AssetRepositoryPort assets) {
+      return new dev.caskeleton.application.techlog.studio.service.UpdateStudioAssetUseCase(
+          assets, new PassThroughTransactionPort());
+    }
+
+    @Bean
+    dev.caskeleton.application.techlog.studio.service.DeleteStudioAssetUseCase
+        deleteStudioAssetUseCase(
+            dev.caskeleton.application.techlog.studio.port.out.AssetRepositoryPort assets,
+            dev.caskeleton.application.techlog.studio.port.out.AssetBinaryStoragePort binaries) {
+      return new dev.caskeleton.application.techlog.studio.service.DeleteStudioAssetUseCase(
+          assets, binaries, new PassThroughTransactionPort());
+    }
+
+    private static dev.caskeleton.application.techlog.studio.service.WorkingCopyDetailAssembler
+        assembler() {
+      return new dev.caskeleton.application.techlog.studio.service.WorkingCopyDetailAssembler(
+          new StubValidationArtifactPort(),
+          new StubPreviewArtifactPort(),
+          documentId -> java.util.Optional.empty(),
+          (kind, documentId) -> "test-dependency-revision",
+          java.time.Clock.systemUTC());
+    }
+  }
+
+  private static final class StubWorkingCopyRepositoryPort
+      implements dev.caskeleton.application.techlog.studio.port.out.WorkingCopyRepositoryPort {
+
+    @Override
+    public java.util.Optional<dev.caskeleton.application.techlog.studio.model.RecordKind> findKind(
+        java.util.UUID documentId) {
+      return java.util.Optional.empty();
+    }
+
+    @Override
+    public java.util.Optional<dev.caskeleton.application.techlog.studio.model.WorkingCopyView> find(
+        java.util.UUID documentId) {
+      return java.util.Optional.empty();
+    }
+
+    @Override
+    public dev.caskeleton.application.techlog.studio.model.WorkingCopyView create(
+        dev.caskeleton.application.techlog.studio.model.WorkingCopyInputView input,
+        String principal) {
+      throw new UnsupportedOperationException("this contract-shape gate never creates a document");
+    }
+
+    @Override
+    public java.util.Optional<dev.caskeleton.application.techlog.studio.model.WorkingCopyView> save(
+        java.util.UUID documentId,
+        long expectedVersion,
+        dev.caskeleton.application.techlog.studio.model.WorkingCopyInputView input,
+        String principal) {
+      return java.util.Optional.empty();
+    }
+  }
+
+  private static final class StubValidationArtifactPort
+      implements dev.caskeleton.application.techlog.studio.port.out.ValidationArtifactPort {
+
+    @Override
+    public java.util.Optional<dev.caskeleton.application.techlog.studio.model.ValidationReportView>
+        latestFor(
+            dev.caskeleton.application.techlog.studio.model.RecordKind kind,
+            java.util.UUID documentId) {
+      return java.util.Optional.empty();
+    }
+
+    @Override
+    public java.util.Optional<dev.caskeleton.application.techlog.studio.model.ValidationReportView>
+        findById(java.util.UUID validationId) {
+      return java.util.Optional.empty();
+    }
+
+    @Override
+    public dev.caskeleton.application.techlog.studio.model.ValidationReportView save(
+        dev.caskeleton.application.techlog.studio.model.RecordKind kind,
+        dev.caskeleton.application.techlog.studio.model.ValidationReportView report,
+        String principal) {
+      return report;
+    }
+  }
+
+  private static final class StubPreviewArtifactPort
+      implements dev.caskeleton.application.techlog.studio.port.out.PreviewArtifactPort {
+
+    @Override
+    public java.util.Optional<dev.caskeleton.application.techlog.studio.model.PublicPreviewView>
+        latestFor(
+            dev.caskeleton.application.techlog.studio.model.RecordKind kind,
+            java.util.UUID documentId) {
+      return java.util.Optional.empty();
+    }
+
+    @Override
+    public java.util.Optional<dev.caskeleton.application.techlog.studio.model.PublicPreviewView>
+        findById(java.util.UUID previewId) {
+      return java.util.Optional.empty();
+    }
+
+    @Override
+    public dev.caskeleton.application.techlog.studio.model.PublicPreviewView save(
+        dev.caskeleton.application.techlog.studio.model.RecordKind kind,
+        dev.caskeleton.application.techlog.studio.model.PublicPreviewView preview,
+        String principal) {
+      return preview;
+    }
+  }
+
+  private static final class StubPublicationWriterPort
+      implements dev.caskeleton.application.techlog.studio.port.out.PublicationWriterPort {
+
+    @Override
+    public java.util.Optional<
+            dev.caskeleton.application.techlog.studio.model.PublicationAggregateView>
+        lockCurrentPublication(
+            dev.caskeleton.application.techlog.studio.model.RecordKind kind,
+            java.util.UUID documentId) {
+      return java.util.Optional.empty();
+    }
+
+    @Override
+    public dev.caskeleton.application.techlog.studio.model.PublishResultView publish(
+        PublishRequest request) {
+      throw new UnsupportedOperationException("this contract-shape gate never publishes");
+    }
+
+    @Override
+    public dev.caskeleton.application.techlog.studio.model.PublishResultView unpublish(
+        UnpublishRequest request) {
+      throw new UnsupportedOperationException("this contract-shape gate never unpublishes");
+    }
+  }
+
+  private static final class StubPublicationHistoryQueryPort
+      implements dev.caskeleton.application.techlog.studio.port.out.PublicationHistoryQueryPort {
+
+    @Override
+    public dev.caskeleton.application.techlog.studio.model.PublicationPageView list(
+        dev.caskeleton.application.techlog.studio.query.ListPublicationsQuery query) {
+      return new dev.caskeleton.application.techlog.studio.model.PublicationPageView(
+          List.of(), null);
+    }
+
+    @Override
+    public java.util.Optional<
+            dev.caskeleton.application.techlog.studio.model.PublicationSnapshotView>
+        findSnapshot(java.util.UUID publicationEventId) {
+      return java.util.Optional.empty();
+    }
+
+    @Override
+    public java.util.Optional<
+            dev.caskeleton.application.techlog.studio.model.PublicationAggregateView>
+        findById(java.util.UUID publicationId) {
+      return java.util.Optional.empty();
+    }
+  }
+
+  private static final class StubStudioDashboardQueryPort
+      implements dev.caskeleton.application.techlog.studio.port.out.StudioDashboardQueryPort {
+
+    @Override
+    public List<dev.caskeleton.application.techlog.studio.model.DocumentSummaryView>
+        topByNextAction(
+            List<dev.caskeleton.application.techlog.studio.model.NextAction> actions, int limit) {
+      return List.of();
+    }
+
+    @Override
+    public dev.caskeleton.application.techlog.studio.model.DashboardTotalsView totals() {
+      return new dev.caskeleton.application.techlog.studio.model.DashboardTotalsView(0, 0, 0, 0);
+    }
+  }
+
+  private static final class StubAssetRepositoryPort
+      implements dev.caskeleton.application.techlog.studio.port.out.AssetRepositoryPort {
+
+    @Override
+    public dev.caskeleton.application.techlog.studio.model.AssetPageView list(
+        dev.caskeleton.application.techlog.studio.query.ListAssetsQuery query) {
+      return new dev.caskeleton.application.techlog.studio.model.AssetPageView(List.of(), null);
+    }
+
+    @Override
+    public java.util.Optional<dev.caskeleton.application.techlog.studio.model.AssetView> find(
+        java.util.UUID assetId) {
+      return java.util.Optional.empty();
+    }
+
+    @Override
+    public java.util.Optional<dev.caskeleton.application.techlog.studio.model.AssetDetailView>
+        findDetail(java.util.UUID assetId) {
+      return java.util.Optional.empty();
+    }
+
+    @Override
+    public dev.caskeleton.application.techlog.studio.model.AssetView create(
+        NewAsset asset, String principal) {
+      throw new UnsupportedOperationException("this contract-shape gate never stores an asset");
+    }
+
+    @Override
+    public java.util.Optional<dev.caskeleton.application.techlog.studio.model.AssetView> update(
+        java.util.UUID assetId,
+        long expectedVersion,
+        dev.caskeleton.application.techlog.studio.model.AssetKindView kind,
+        String altText,
+        boolean altTextProvided,
+        Boolean decorative,
+        dev.caskeleton.application.techlog.studio.model.AssetManagementStatusView managementStatus,
+        String principal) {
+      return java.util.Optional.empty();
+    }
+
+    @Override
+    public java.util.Optional<String> findObjectKey(java.util.UUID assetId) {
+      return java.util.Optional.empty();
+    }
+
+    @Override
+    public void delete(java.util.UUID assetId) {
+      // 이 게이트는 삭제하지 않는다.
+    }
+  }
+
   private static final class StubCatalogQueryPort implements CatalogQueryPort {
     @Override
     public CatalogPageView search(CatalogEntryType type, String query, String cursor, int limit) {

src/app-bootstrap/src/main/java/dev/caskeleton/bootstrap/techlog/ObjectStorageAssetBinaryAdapter.java

@@ -0,0 +1,51 @@
+package dev.caskeleton.bootstrap.techlog;
+
+import dev.caskeleton.application.storage.ObjectStoragePort;
+import dev.caskeleton.application.techlog.error.StudioError;
+import dev.caskeleton.application.techlog.error.StudioException;
+import dev.caskeleton.application.techlog.studio.port.out.AssetBinaryStoragePort;
+import org.springframework.beans.factory.ObjectProvider;
+
+/**
+ * Studio Asset 바이너리를 기존 object storage 어댑터에 위임한다(spec §9 — 새 저장 계층을 만들지 않는다).
+ *
+ * <p>이 브리지가 app-bootstrap 에 있는 이유: 두 기존 포트를 잇는 <b>구성</b>이라 어느 한쪽 어댑터 모듈의 소유가 아니다. objectstorage 모듈은
+ * techlog 를 모르고, techlog 영속 모듈은 저장 백엔드를 모른다.
+ *
+ * <p>{@code ObjectStoragePort} 는 {@code @Deprecated(forRemoval = true)} 다. 그럼에도 쓰는 이유는 이 저장소에서 실제로
+ * 동작하는 어댑터(filesystem/S3)가 붙어 있는 유일한 포트이기 때문이다 — 후속 {@code objectstorage.port.*} 계열에는 아직 구현이
+ * 없다(실측). 선택을 이 한 클래스에 가둬 두었으므로 새 API 로 옮길 때 바뀌는 것은 여기뿐이다.
+ *
+ * <p>저장 백엔드가 구성되지 않은 배포에서는 빈이 없다. 그때는 업로드·삭제만 {@code STUDIO_UNAVAILABLE} 로 거절하고 목록·조회·메타데이터 수정은 그대로
+ * 동작한다 — 없는 기능 때문에 있는 기능까지 막지 않는다.
+ */
+@SuppressWarnings("removal")
+final class ObjectStorageAssetBinaryAdapter implements AssetBinaryStoragePort {
+
+  private final ObjectProvider<ObjectStoragePort> objectStorage;
+
+  ObjectStorageAssetBinaryAdapter(ObjectProvider<ObjectStoragePort> objectStorage) {
+    this.objectStorage = objectStorage;
+  }
+
+  @Override
+  public String store(String objectKey, byte[] content, String mediaType) {
+    return require().put(objectKey, content, mediaType).key();
+  }
+
+  @Override
+  public void delete(String objectKey) {
+    require().delete(objectKey);
+  }
+
+  private ObjectStoragePort require() {
+    ObjectStoragePort port = objectStorage.getIfAvailable();
+    if (port == null) {
+      throw StudioException.of(
+          StudioError.STUDIO_UNAVAILABLE,
+          "no object storage backend is configured; set ca-skeleton.objectstorage.* to enable"
+              + " Studio asset uploads");
+    }
+    return port;
+  }
+}

src/app-bootstrap/src/main/java/dev/caskeleton/bootstrap/techlog/TechLogStudioConfig.java

@@ -1,8 +1,46 @@
 package dev.caskeleton.bootstrap.techlog;
 
+import dev.caskeleton.adapter.inbound.web.techlog.studio.support.StudioSettings;
+import dev.caskeleton.application.storage.ObjectStoragePort;
+import dev.caskeleton.application.techlog.studio.port.out.AssetBinaryStoragePort;
+import dev.caskeleton.application.techlog.studio.port.out.AssetRepositoryPort;
 import dev.caskeleton.application.techlog.studio.port.out.CatalogQueryPort;
+import dev.caskeleton.application.techlog.studio.port.out.ContentAnalyzerPort;
+import dev.caskeleton.application.techlog.studio.port.out.DependencyRevisionPort;
+import dev.caskeleton.application.techlog.studio.port.out.PreviewArtifactPort;
+import dev.caskeleton.application.techlog.studio.port.out.PublicationHistoryQueryPort;
+import dev.caskeleton.application.techlog.studio.port.out.PublicationQueryPort;
+import dev.caskeleton.application.techlog.studio.port.out.PublicationWriterPort;
+import dev.caskeleton.application.techlog.studio.port.out.RenderModelPort;
+import dev.caskeleton.application.techlog.studio.port.out.StudioDashboardQueryPort;
+import dev.caskeleton.application.techlog.studio.port.out.StudioDependencyResolverPort;
+import dev.caskeleton.application.techlog.studio.port.out.StudioDocumentQueryPort;
+import dev.caskeleton.application.techlog.studio.port.out.ValidationArtifactPort;
+import dev.caskeleton.application.techlog.studio.port.out.WorkingCopyRepositoryPort;
+import dev.caskeleton.application.techlog.studio.service.CreateStudioDocumentUseCase;
+import dev.caskeleton.application.techlog.studio.service.CreateStudioPreviewUseCase;
+import dev.caskeleton.application.techlog.studio.service.DeleteStudioAssetUseCase;
+import dev.caskeleton.application.techlog.studio.service.GetCurrentStudioPreviewUseCase;
+import dev.caskeleton.application.techlog.studio.service.GetStudioAssetUseCase;
+import dev.caskeleton.application.techlog.studio.service.GetStudioDashboardUseCase;
+import dev.caskeleton.application.techlog.studio.service.GetStudioDocumentUseCase;
+import dev.caskeleton.application.techlog.studio.service.GetStudioPublicationSnapshotUseCase;
 import dev.caskeleton.application.techlog.studio.service.ListCatalogUseCase;
+import dev.caskeleton.application.techlog.studio.service.ListStudioAssetsUseCase;
+import dev.caskeleton.application.techlog.studio.service.ListStudioDocumentsUseCase;
+import dev.caskeleton.application.techlog.studio.service.ListStudioPublicationsUseCase;
+import dev.caskeleton.application.techlog.studio.service.PublishStudioDocumentUseCase;
+import dev.caskeleton.application.techlog.studio.service.SaveStudioDocumentUseCase;
+import dev.caskeleton.application.techlog.studio.service.StudioDocumentLoader;
+import dev.caskeleton.application.techlog.studio.service.UnpublishStudioPublicationUseCase;
+import dev.caskeleton.application.techlog.studio.service.UpdateStudioAssetUseCase;
+import dev.caskeleton.application.techlog.studio.service.UploadStudioAssetUseCase;
+import dev.caskeleton.application.techlog.studio.service.ValidateStudioDocumentUseCase;
+import dev.caskeleton.application.techlog.studio.service.WorkingCopyDetailAssembler;
 import dev.caskeleton.application.transaction.TransactionPort;
+import java.time.Clock;
+import java.util.UUID;
+import org.springframework.beans.factory.ObjectProvider;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 
@@ -15,4 +53,201 @@ public class TechLogStudioConfig {
       CatalogQueryPort catalogQueryPort, TransactionPort transactionPort) {
     return new ListCatalogUseCase(catalogQueryPort, transactionPort);
   }
+
+  @Bean
+  WorkingCopyDetailAssembler workingCopyDetailAssembler(
+      ValidationArtifactPort validations,
+      PreviewArtifactPort previews,
+      PublicationQueryPort publications,
+      DependencyRevisionPort dependencyRevisions,
+      Clock clock) {
+    return new WorkingCopyDetailAssembler(
+        validations, previews, publications, dependencyRevisions, clock);
+  }
+
+  @Bean
+  ListStudioDocumentsUseCase listStudioDocumentsUseCase(
+      StudioDocumentQueryPort documents, TransactionPort transactionPort) {
+    return new ListStudioDocumentsUseCase(documents, transactionPort);
+  }
+
+  @Bean
+  GetStudioDocumentUseCase getStudioDocumentUseCase(
+      WorkingCopyRepositoryPort workingCopies,
+      WorkingCopyDetailAssembler assembler,
+      TransactionPort transactionPort) {
+    return new GetStudioDocumentUseCase(workingCopies, assembler, transactionPort);
+  }
+
+  @Bean
+  CreateStudioDocumentUseCase createStudioDocumentUseCase(
+      WorkingCopyRepositoryPort workingCopies, TransactionPort transactionPort) {
+    return new CreateStudioDocumentUseCase(workingCopies, transactionPort);
+  }
+
+  @Bean
+  StudioDocumentLoader studioDocumentLoader(WorkingCopyRepositoryPort workingCopies) {
+    return new StudioDocumentLoader(workingCopies);
+  }
+
+  @Bean
+  ValidateStudioDocumentUseCase validateStudioDocumentUseCase(
+      StudioDocumentLoader documents,
+      StudioDependencyResolverPort dependencies,
+      ContentAnalyzerPort contentAnalyzer,
+      DependencyRevisionPort dependencyRevisions,
+      ValidationArtifactPort validations,
+      TransactionPort transactionPort,
+      Clock clock,
+      StudioSettings settings) {
+    return new ValidateStudioDocumentUseCase(
+        documents,
+        dependencies,
+        contentAnalyzer,
+        dependencyRevisions,
+        validations,
+        transactionPort,
+        UUID::randomUUID,
+        clock,
+        settings.validationTtl());
+  }
+
+  @Bean
+  CreateStudioPreviewUseCase createStudioPreviewUseCase(
+      StudioDocumentLoader documents,
+      StudioDependencyResolverPort dependencies,
+      ContentAnalyzerPort contentAnalyzer,
+      DependencyRevisionPort dependencyRevisions,
+      ValidationArtifactPort validations,
+      PreviewArtifactPort previews,
+      RenderModelPort renderer,
+      TransactionPort transactionPort,
+      Clock clock,
+      StudioSettings settings) {
+    return new CreateStudioPreviewUseCase(
+        documents,
+        dependencies,
+        contentAnalyzer,
+        dependencyRevisions,
+        validations,
+        previews,
+        renderer,
+        transactionPort,
+        UUID::randomUUID,
+        clock,
+        settings.previewTtl());
+  }
+
+  @Bean
+  GetCurrentStudioPreviewUseCase getCurrentStudioPreviewUseCase(
+      StudioDocumentLoader documents,
+      PreviewArtifactPort previews,
+      ValidationArtifactPort validations,
+      DependencyRevisionPort dependencyRevisions,
+      TransactionPort transactionPort,
+      Clock clock) {
+    return new GetCurrentStudioPreviewUseCase(
+        documents, previews, validations, dependencyRevisions, transactionPort, clock);
+  }
+
+  @Bean
+  SaveStudioDocumentUseCase saveStudioDocumentUseCase(
+      WorkingCopyRepositoryPort workingCopies,
+      WorkingCopyDetailAssembler assembler,
+      TransactionPort transactionPort) {
+    return new SaveStudioDocumentUseCase(workingCopies, assembler, transactionPort);
+  }
+
+  @Bean
+  PublishStudioDocumentUseCase publishStudioDocumentUseCase(
+      StudioDocumentLoader documents,
+      StudioDependencyResolverPort dependencies,
+      ContentAnalyzerPort contentAnalyzer,
+      DependencyRevisionPort dependencyRevisions,
+      ValidationArtifactPort validations,
+      PreviewArtifactPort previews,
+      PublicationWriterPort publications,
+      TransactionPort transactionPort,
+      Clock clock) {
+    return new PublishStudioDocumentUseCase(
+        documents,
+        dependencies,
+        contentAnalyzer,
+        dependencyRevisions,
+        validations,
+        previews,
+        publications,
+        transactionPort,
+        clock);
+  }
+
+  @Bean
+  UnpublishStudioPublicationUseCase unpublishStudioPublicationUseCase(
+      PublicationHistoryQueryPort history,
+      PublicationWriterPort publications,
+      StudioDocumentLoader documents,
+      TransactionPort transactionPort) {
+    return new UnpublishStudioPublicationUseCase(history, publications, documents, transactionPort);
+  }
+
+  @Bean
+  ListStudioPublicationsUseCase listStudioPublicationsUseCase(
+      PublicationHistoryQueryPort history, TransactionPort transactionPort) {
+    return new ListStudioPublicationsUseCase(history, transactionPort);
+  }
+
+  @Bean
+  GetStudioPublicationSnapshotUseCase getStudioPublicationSnapshotUseCase(
+      PublicationHistoryQueryPort history, TransactionPort transactionPort) {
+    return new GetStudioPublicationSnapshotUseCase(history, transactionPort);
+  }
+
+  @Bean
+  GetStudioDashboardUseCase getStudioDashboardUseCase(
+      StudioDashboardQueryPort dashboard,
+      PublicationHistoryQueryPort history,
+      TransactionPort transactionPort) {
+    return new GetStudioDashboardUseCase(dashboard, history, transactionPort);
+  }
+
+  /** spec §9 — Asset 은 새 저장 계층을 만들지 않고 기존 object storage 어댑터를 재사용한다. */
+  @Bean
+  @SuppressWarnings("removal")
+  AssetBinaryStoragePort assetBinaryStoragePort(ObjectProvider<ObjectStoragePort> objectStorage) {
+    return new ObjectStorageAssetBinaryAdapter(objectStorage);
+  }
+
+  @Bean
+  UploadStudioAssetUseCase uploadStudioAssetUseCase(
+      AssetRepositoryPort assets,
+      AssetBinaryStoragePort binaries,
+      TransactionPort transactionPort) {
+    return new UploadStudioAssetUseCase(assets, binaries, transactionPort, UUID::randomUUID);
+  }
+
+  @Bean
+  ListStudioAssetsUseCase listStudioAssetsUseCase(
+      AssetRepositoryPort assets, TransactionPort transactionPort) {
+    return new ListStudioAssetsUseCase(assets, transactionPort);
+  }
+
+  @Bean
+  GetStudioAssetUseCase getStudioAssetUseCase(
+      AssetRepositoryPort assets, TransactionPort transactionPort) {
+    return new GetStudioAssetUseCase(assets, transactionPort);
+  }
+
+  @Bean
+  UpdateStudioAssetUseCase updateStudioAssetUseCase(
+      AssetRepositoryPort assets, TransactionPort transactionPort) {
+    return new UpdateStudioAssetUseCase(assets, transactionPort);
+  }
+
+  @Bean
+  DeleteStudioAssetUseCase deleteStudioAssetUseCase(
+      AssetRepositoryPort assets,
+      AssetBinaryStoragePort binaries,
+      TransactionPort transactionPort) {
+    return new DeleteStudioAssetUseCase(assets, binaries, transactionPort);
+  }
 }

src/app-bootstrap/src/main/resources/application-dev.yml

@@ -22,6 +22,17 @@ spring:
 ca-skeleton:
   persistence:
     vendor: postgresql
+  authz:
+    role-permissions:
+      # Studio 편집 권한(@RequiresPermission("studio:write")). 키는 IdP 가 주는 RAW role 이름이라
+      # 배포마다 다르다 — APP_STUDIO_AUTHOR_ROLE 로 자기 realm 의 이름을 준다.
+      #
+      # application.yml 이 아니라 프로파일에 두는 이유: SampleRemovalSmokeContractTest 가 템플릿
+      # 기준선인 `role-permissions: {}` 가 그대로 있는지를 검사한다. 제품 권한 매핑은 그 기준선을
+      # 흔들지 않고 프로파일에서 더한다.
+      ${APP_STUDIO_AUTHOR_ROLE:studio-author}:
+        - studio:write
+
   security:
     # Studio's contract (studio-v1.yaml StudioSession.csrfHeaderName) fixes this header name as a
     # `const`. The template default is X-XSRF-TOKEN; Studio needs X-CSRF-TOKEN to match.

src/app-bootstrap/src/main/resources/application-local.yml

@@ -65,6 +65,25 @@ spring:
     properties:
       hibernate:
         format_sql: false
+  objectstorage:
+    # Studio Asset 바이너리 저장소. ObjectStorageConfig 는 이 prefix 의 property 가 하나라도 있어야
+    # 활성화된다(LegacyObjectStorageActivationGuard) — application.yml 이 아니라 프로파일에 두는 이유는,
+    # 저장 백엔드 선택이 배포마다 다른 결정이라 템플릿 기준선이 그것을 대신 정해서는 안 되기 때문이다.
+    # 이 값이 없는 배포에서는 업로드·삭제만 STUDIO_UNAVAILABLE 로 거절되고 나머지 Asset operation 은
+    # 그대로 동작한다.
+    backend: filesystem
+
+  authz:
+    role-permissions:
+      # Studio 편집 권한(@RequiresPermission("studio:write")). 키는 IdP 가 주는 RAW role 이름이라
+      # 배포마다 다르다 — APP_STUDIO_AUTHOR_ROLE 로 자기 realm 의 이름을 준다.
+      #
+      # application.yml 이 아니라 프로파일에 두는 이유: SampleRemovalSmokeContractTest 가 템플릿
+      # 기준선인 `role-permissions: {}` 가 그대로 있는지를 검사한다. 제품 권한 매핑은 그 기준선을
+      # 흔들지 않고 프로파일에서 더한다.
+      ${APP_STUDIO_AUTHOR_ROLE:studio-author}:
+        - studio:write
+
   security:
     oauth2:
       resourceserver:

src/app-bootstrap/src/main/resources/application-prod.yml

@@ -26,6 +26,17 @@ spring:
 ca-skeleton:
   persistence:
     vendor: postgresql
+  authz:
+    role-permissions:
+      # Studio 편집 권한(@RequiresPermission("studio:write")). 키는 IdP 가 주는 RAW role 이름이라
+      # 배포마다 다르다 — APP_STUDIO_AUTHOR_ROLE 로 자기 realm 의 이름을 준다.
+      #
+      # application.yml 이 아니라 프로파일에 두는 이유: SampleRemovalSmokeContractTest 가 템플릿
+      # 기준선인 `role-permissions: {}` 가 그대로 있는지를 검사한다. 제품 권한 매핑은 그 기준선을
+      # 흔들지 않고 프로파일에서 더한다.
+      ${APP_STUDIO_AUTHOR_ROLE:studio-author}:
+        - studio:write
+
   security:
     # Studio's contract (studio-v1.yaml StudioSession.csrfHeaderName) fixes this header name as a
     # `const`. The template default is X-XSRF-TOKEN; Studio needs X-CSRF-TOKEN to match.

src/app-bootstrap/src/main/resources/application.yml

@@ -446,6 +446,16 @@ ca-skeleton:
     # prefix "/v1" (major-version path, AIP-185); override via env, or set "" for
     # no prefix. The supplemental "X-Api-Version" header never overrides the path.
     api-base-path: ${PRESENTATION_API_BASE_PATH:/v1}
+  techlog:
+    studio:
+      # Studio 문서 목록 커서 서명 키. 값이 없거나 16바이트 미만이면 StudioSettings가 경고하고 개발용
+      # 값으로 대체한다 — 커서에 권한이 실리지 않아 부팅을 막을 사유는 아니지만, 인스턴스마다 값이
+      # 다르면 한 인스턴스가 발급한 커서를 다른 인스턴스가 거부한다.
+      cursor-signing-key: ${APP_STUDIO_CURSOR_SIGNING_KEY:}
+      # 검증 결과가 유효한 기간(studio_validation.valid_until).
+      validation-ttl: ${APP_STUDIO_VALIDATION_TTL:1h}
+      # 미리보기가 유효한 기간(studio_preview.expires_at).
+      preview-ttl: ${APP_STUDIO_PREVIEW_TTL:24h}
   idempotency:
     # feature-rate-limit-idempotency-contract D6/§E. ttl is env-driven (<=72h,
     # validated in IdempotencyProperties); reaper-interval is literal operational tuning.

src/app-bootstrap/src/test/java/dev/caskeleton/bootstrap/architecture/TechLogBoundaryArchTest.java

@@ -28,6 +28,13 @@ class TechLogBoundaryArchTest {
   // (publication과 같은 성격) NO_CONTEXT_DEPENDS_ON_PUBLICATION_DOMAIN과 같은 모양의
   // 전용 규칙도 검토한다.
 
+  // 이 규칙들의 패키지 패턴(`..techlog.<context>..`)은 계층을 가리지 않는다 — application 뿐 아니라
+  // adapter 쪽 패키지도 같은 이름을 쓰면 걸린다. 그래서 <b>어댑터 패키지를 bounded context 이름으로
+  // 짓지 않는다</b>: Studio 의 outbound 포트를 구현하는 영속 어댑터는
+  // `...persistence.techlog.studio.<area>` 에 둔다. 그 이름이 규칙을 피하려는 우회가 아니라 실제로 더
+  // 정확하다 — 그 어댑터들은 asset/publication context 의 소유물이 아니라 Studio 포트의 구현이다.
+  // (슬라이스 4~5 에서 `...persistence.techlog.asset` 로 지었다가 이 규칙이 223건을 잡아냈다.)
+
   @ArchTest
   static final ArchRule CONTENT_DOES_NOT_DEPEND_ON_SIBLING_CONTEXTS =
       noClasses()

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/command/CreateDocumentCommand.java

@@ -0,0 +1,12 @@
+package dev.caskeleton.application.techlog.studio.command;
+
+import dev.caskeleton.application.command.Command;
+import dev.caskeleton.application.techlog.studio.model.WorkingCopyInputView;
+
+/**
+ * {@code createStudioDocument}의 입력.
+ *
+ * @param principal 감사 컬럼({@code created_by}/{@code updated_by})에 남길 주체
+ */
+public record CreateDocumentCommand(WorkingCopyInputView document, String principal)
+    implements Command {}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/command/CreatePreviewCommand.java

@@ -0,0 +1,9 @@
+package dev.caskeleton.application.techlog.studio.command;
+
+import dev.caskeleton.application.command.Command;
+import java.util.UUID;
+
+/** {@code createStudioPreview}의 입력. */
+public record CreatePreviewCommand(
+    UUID documentId, long expectedVersion, UUID validationId, String principal)
+    implements Command {}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/command/DeleteAssetCommand.java

@@ -0,0 +1,7 @@
+package dev.caskeleton.application.techlog.studio.command;
+
+import dev.caskeleton.application.command.Command;
+import java.util.UUID;
+
+/** {@code deleteStudioAsset}의 입력. */
+public record DeleteAssetCommand(UUID assetId, String principal) implements Command {}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/command/PublishDocumentCommand.java

@@ -0,0 +1,22 @@
+package dev.caskeleton.application.techlog.studio.command;
+
+import dev.caskeleton.application.command.Command;
+import java.util.List;
+import java.util.UUID;
+
+/** {@code publishStudioDocument}의 입력. */
+public record PublishDocumentCommand(
+    UUID documentId,
+    long expectedVersion,
+    UUID validationId,
+    UUID previewId,
+    List<String> acknowledgedWarningCodes,
+    String idempotencyKey,
+    String principal)
+    implements Command {
+
+  public PublishDocumentCommand {
+    acknowledgedWarningCodes =
+        acknowledgedWarningCodes == null ? List.of() : List.copyOf(acknowledgedWarningCodes);
+  }
+}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/command/SaveDocumentCommand.java

@@ -0,0 +1,10 @@
+package dev.caskeleton.application.techlog.studio.command;
+
+import dev.caskeleton.application.command.Command;
+import dev.caskeleton.application.techlog.studio.model.WorkingCopyInputView;
+import java.util.UUID;
+
+/** {@code saveStudioDocument}의 입력. */
+public record SaveDocumentCommand(
+    UUID documentId, long expectedVersion, WorkingCopyInputView document, String principal)
+    implements Command {}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/command/UnpublishPublicationCommand.java

@@ -0,0 +1,8 @@
+package dev.caskeleton.application.techlog.studio.command;
+
+import dev.caskeleton.application.command.Command;
+import java.util.UUID;
+
+/** {@code unpublishStudioPublication}의 입력. */
+public record UnpublishPublicationCommand(
+    UUID publicationId, long expectedPublicationRevision, String principal) implements Command {}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/command/UpdateAssetCommand.java

@@ -0,0 +1,23 @@
+package dev.caskeleton.application.techlog.studio.command;
+
+import dev.caskeleton.application.command.Command;
+import dev.caskeleton.application.techlog.studio.model.AssetKindView;
+import dev.caskeleton.application.techlog.studio.model.AssetManagementStatusView;
+import java.util.UUID;
+
+/**
+ * {@code updateStudioAsset}의 입력. 계약이 허용하는 것은 {@code altText}, {@code decorative}, {@code kind}, 그리고
+ * {@code READY ↔ ARCHIVED} 전환뿐이다.
+ *
+ * @param altTextProvided {@code altText}가 요청에 실렸는지. null 로 지우는 것과 아예 안 보낸 것을 구분한다.
+ */
+public record UpdateAssetCommand(
+    UUID assetId,
+    long expectedVersion,
+    AssetKindView kind,
+    String altText,
+    boolean altTextProvided,
+    Boolean decorative,
+    AssetManagementStatusView managementStatus,
+    String principal)
+    implements Command {}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/command/UploadAssetCommand.java

@@ -0,0 +1,74 @@
+package dev.caskeleton.application.techlog.studio.command;
+
+import dev.caskeleton.application.command.Command;
+import dev.caskeleton.application.techlog.studio.model.AssetKindView;
+import java.util.Objects;
+
+/**
+ * {@code uploadStudioAsset}의 입력.
+ *
+ * <p>record 가 아니라 class 인 이유는 바이트 배열 때문이다 — 배열을 record 구성요소로 두면 {@code equals} 가 내용이 아니라 참조를 비교해
+ * "같은 파일"을 다르다고 판정한다.
+ */
+public final class UploadAssetCommand implements Command {
+
+  private final String originalFilename;
+  private final String declaredMediaType;
+  private final byte[] content;
+  private final AssetKindView kind;
+  private final String altText;
+  private final boolean decorative;
+  private final String principal;
+
+  /**
+   * @param declaredMediaType 클라이언트가 말한 것. Backend 는 이 값을 신뢰하지 않고 내용으로 다시 판정한다 (계약 설명).
+   */
+  public UploadAssetCommand(
+      String originalFilename,
+      String declaredMediaType,
+      byte[] content,
+      AssetKindView kind,
+      String altText,
+      boolean decorative,
+      String principal) {
+    this.originalFilename = originalFilename;
+    this.declaredMediaType = declaredMediaType;
+    this.content = Objects.requireNonNull(content, "content").clone();
+    this.kind = kind;
+    this.altText = altText;
+    this.decorative = decorative;
+    this.principal = principal;
+  }
+
+  public String originalFilename() {
+    return originalFilename;
+  }
+
+  public String declaredMediaType() {
+    return declaredMediaType;
+  }
+
+  public byte[] content() {
+    return content.clone();
+  }
+
+  public int byteSize() {
+    return content.length;
+  }
+
+  public AssetKindView kind() {
+    return kind;
+  }
+
+  public String altText() {
+    return altText;
+  }
+
+  public boolean decorative() {
+    return decorative;
+  }
+
+  public String principal() {
+    return principal;
+  }
+}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/command/ValidateDocumentCommand.java

@@ -0,0 +1,8 @@
+package dev.caskeleton.application.techlog.studio.command;
+
+import dev.caskeleton.application.command.Command;
+import java.util.UUID;
+
+/** {@code validateStudioDocument}의 입력. */
+public record ValidateDocumentCommand(UUID documentId, long expectedVersion, String principal)
+    implements Command {}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/AssetDetailView.java

@@ -0,0 +1,16 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+import java.util.List;
+
+/**
+ * 계약 {@code AssetDetail}.
+ *
+ * @param hasPublicationHistory 참이면 hard delete 를 금지하고 {@code ARCHIVED} 전환만 허용한다
+ */
+public record AssetDetailView(
+    AssetView asset, List<AssetUsageView> usages, boolean hasPublicationHistory) {
+
+  public AssetDetailView {
+    usages = usages == null ? List.of() : List.copyOf(usages);
+  }
+}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/AssetKindView.java

@@ -0,0 +1,8 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+/** 계약 {@code AssetKind}. */
+public enum AssetKindView {
+  IMAGE,
+  DIAGRAM,
+  ATTACHMENT
+}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/AssetManagementStatusView.java

@@ -0,0 +1,13 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+/**
+ * 계약 {@code AssetManagementStatus}.
+ *
+ * <p>{@link #REJECTED}/{@link #QUARANTINED}는 서버 검증 결과이며 클라이언트가 지정할 수 없다.
+ */
+public enum AssetManagementStatusView {
+  READY,
+  ARCHIVED,
+  REJECTED,
+  QUARANTINED
+}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/AssetManifestEntry.java

@@ -0,0 +1,18 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+import java.util.UUID;
+
+/**
+ * 게시 시점에 고정하는 Asset descriptor 한 건({@code publication_snapshot.asset_manifest}).
+ *
+ * <p>이후 Asset 이 교체돼도 과거 Snapshot 의 표현이 변하지 않게 하는 장치다 — ADR-002 가 요구하는 역사적 불변성이며, ADR-005 가 인정한 "네
+ * 화면 중 Snapshot 만 다른 유일한 지점"이다.
+ */
+public record AssetManifestEntry(
+    UUID assetId,
+    String assetKey,
+    String mediaType,
+    String publicPath,
+    Integer width,
+    Integer height,
+    boolean decorative) {}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/AssetPageView.java

@@ -0,0 +1,11 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+import java.util.List;
+
+/** 계약 {@code AssetPage}. */
+public record AssetPageView(List<AssetView> items, String nextCursor) {
+
+  public AssetPageView {
+    items = items == null ? List.of() : List.copyOf(items);
+  }
+}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/AssetUsageView.java

@@ -0,0 +1,7 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+import java.util.UUID;
+
+/** 계약 {@code AssetUsage}. 이 Asset 을 쓰는 문서 한 건. */
+public record AssetUsageView(
+    UUID documentId, RecordKind documentKind, String title, boolean published) {}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/AssetView.java

@@ -0,0 +1,28 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+import java.time.Instant;
+import java.util.UUID;
+
+/**
+ * 계약 {@code Asset}.
+ *
+ * @param assetKey Public content 가 쓰는 안정적인 key. object storage key 도 raw URL 도 아니며 immutable 이다 —
+ *     공개 이력이 있는 key 의 재사용은 금지한다.
+ */
+public record AssetView(
+    UUID id,
+    String assetKey,
+    AssetKindView kind,
+    String mediaType,
+    String originalFilename,
+    long byteSize,
+    Integer width,
+    Integer height,
+    String altText,
+    boolean decorative,
+    AssetManagementStatusView managementStatus,
+    String publicPath,
+    int usageCount,
+    long version,
+    Instant createdAt,
+    Instant updatedAt) {}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/DashboardTotalsView.java

@@ -0,0 +1,5 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+/** 계약 {@code DashboardTotals}. */
+public record DashboardTotalsView(
+    int documents, int needsValidation, int readyToPublish, int publications) {}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/DashboardView.java

@@ -0,0 +1,17 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+import java.util.List;
+
+/** 계약 {@code StudioDashboard}. */
+public record DashboardView(
+    List<DocumentSummaryView> continueWriting,
+    List<DocumentSummaryView> readyToPublish,
+    List<PublicationListItemView> recentPublications,
+    DashboardTotalsView totals) {
+
+  public DashboardView {
+    continueWriting = continueWriting == null ? List.of() : List.copyOf(continueWriting);
+    readyToPublish = readyToPublish == null ? List.of() : List.copyOf(readyToPublish);
+    recentPublications = recentPublications == null ? List.of() : List.copyOf(recentPublications);
+  }
+}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/DecisionStatusView.java

@@ -0,0 +1,7 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+/** 계약의 UI 용어(ADR-003). Domain의 {@code ACCEPTED}가 {@link #ADOPTED}로 보인다. */
+public enum DecisionStatusView {
+  PROPOSED,
+  ADOPTED
+}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/DisplayTargetView.java

@@ -0,0 +1,6 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+import java.util.UUID;
+
+/** 계약 {@code DisplayTarget}. */
+public record DisplayTargetView(UUID id, String label, String publicPath) {}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/DocumentPageView.java

@@ -0,0 +1,11 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+import java.util.List;
+
+/** 계약 {@code DocumentPage}. */
+public record DocumentPageView(List<DocumentSummaryView> items, String nextCursor) {
+
+  public DocumentPageView {
+    items = items == null ? List.of() : List.copyOf(items);
+  }
+}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/DocumentSort.java

@@ -0,0 +1,8 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+/** 계약 파라미터 {@code sort} (studio-v1.yaml components.parameters.DocumentSort). */
+public enum DocumentSort {
+  UPDATED_DESC,
+  UPDATED_ASC,
+  TITLE_ASC
+}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/DocumentSummaryView.java

@@ -0,0 +1,22 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+import java.time.Instant;
+import java.util.UUID;
+
+/**
+ * 계약 {@code DocumentSummary}. 목록·대시보드가 쓰는 요약이다.
+ *
+ * @param publishedVersion 게시한 적이 없으면 null
+ * @param hasUnpublishedChanges {@code version != publishedVersion}. 게시 취소 상태에서도 과거
+ *     publishedVersion과 비교한다(계약 주석).
+ */
+public record DocumentSummaryView(
+    UUID id,
+    String title,
+    RecordKind kind,
+    DisplayTargetView project,
+    Instant updatedAt,
+    PublicationStatusView publicationStatus,
+    Long publishedVersion,
+    boolean hasUnpublishedChanges,
+    NextAction nextAction) {}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/NextAction.java

@@ -0,0 +1,11 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+/** 계약 {@code NextAction}. 서버가 조회 시점에 계산하는 Studio projection이며 domain 컬럼에 저장하지 않는다 (spec §6.3). */
+public enum NextAction {
+  CONTINUE_EDITING,
+  VALIDATE,
+  FIX_VALIDATION,
+  CREATE_PREVIEW,
+  PUBLISH,
+  NONE
+}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/OrderedTextView.java

@@ -0,0 +1,6 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+import java.util.UUID;
+
+/** 계약 {@code OrderedText}. */
+public record OrderedTextView(UUID id, String text, int order) {}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/PreviewDetailView.java

@@ -0,0 +1,10 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+import java.util.UUID;
+
+/** 계약 {@code PreviewDetail}. */
+public record PreviewDetailView(
+    PublicPreviewView preview,
+    PreviewState state,
+    long currentDocumentVersion,
+    UUID currentValidationId) {}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/PreviewState.java

@@ -0,0 +1,8 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+/** 계약 {@code PreviewDetail.state}. 저장하지 않고 조회 시 계산한다(spec §7.3). */
+public enum PreviewState {
+  CURRENT,
+  STALE,
+  EXPIRED
+}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/PublicPaths.java

@@ -0,0 +1,33 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+/**
+ * 공개 경로 규칙(설계 01장 §3, {@code public-v1.yaml}의 path).
+ *
+ * <p>한 곳에 둔다 — 렌더 모델의 {@code publicPath}, 카탈로그의 {@code publicPath}, 게시 시 만드는 {@code public_route}가
+ * 서로 다른 규칙으로 만들어지면 미리보기의 링크와 실제 공개 주소가 달라진다.
+ */
+public final class PublicPaths {
+
+  private PublicPaths() {}
+
+  /**
+   * 이 유형과 slug 의 공개 경로.
+   *
+   * @param projectSlug {@code PROJECT_DECISION}에만 쓰인다. 없으면 결정 경로를 만들 수 없어 null을 준다.
+   * @return slug가 비어 있으면 null — 아직 공개 주소가 없는 초안이다.
+   */
+  public static String forKind(RecordKind kind, String slug, String projectSlug) {
+    if (slug == null || slug.isBlank()) {
+      return null;
+    }
+    return switch (kind) {
+      case CASE -> "/cases/" + slug;
+      case REFERENCE -> "/references/" + slug;
+      case QUESTION -> "/questions/" + slug;
+      case PROJECT_DECISION ->
+          (projectSlug == null || projectSlug.isBlank())
+              ? null
+              : "/projects/" + projectSlug + "/decisions/" + slug;
+    };
+  }
+}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/PublicPreviewView.java

@@ -0,0 +1,21 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+import java.time.Instant;
+import java.util.UUID;
+
+/**
+ * 계약 {@code PublicPreview}.
+ *
+ * <p>{@code renderModel}을 application 계층에서 구조화된 타입으로 다시 모델링하지 않고 직렬화된 JSON 문자열로 들고 다닌다. 이유: 이 값은
+ * {@code studio_preview.render_model}(jsonb)에 그대로 저장되고 웹 계층에서 계약 DTO로 그대로 나가는 통과 데이터이며, 중간에 한 번 더
+ * 도메인 타입으로 접었다 펴면 렌더러가 만든 모양과 계약 모양 사이에 조용한 손실이 생길 수 있다. 렌더링 자체의 타입 안전성은 렌더러가 계약 DTO를 직접 만들며 책임진다.
+ */
+public record PublicPreviewView(
+    UUID previewId,
+    UUID documentId,
+    long previewVersion,
+    UUID validationId,
+    String dependencyRevision,
+    Instant createdAt,
+    Instant expiresAt,
+    String renderModelJson) {}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/PublicationActionView.java

@@ -0,0 +1,8 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+/** 계약 {@code PublicationAction} (studio-v1.yaml:1661). */
+public enum PublicationActionView {
+  VIEW_SNAPSHOT,
+  VIEW_SOURCE_SNAPSHOT,
+  UNPUBLISH
+}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/PublicationAggregateStatus.java

@@ -0,0 +1,7 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+/** 계약 {@code PublicationAggregate.status}. */
+public enum PublicationAggregateStatus {
+  PUBLISHED,
+  UNPUBLISHED
+}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/PublicationAggregateView.java

@@ -0,0 +1,15 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+import java.time.Instant;
+import java.util.UUID;
+
+/** 계약 {@code PublicationAggregate}. 현재 게시 상태이며 게시 이력과 구분한다. */
+public record PublicationAggregateView(
+    UUID publicationId,
+    UUID documentId,
+    PublicationAggregateStatus status,
+    long publishedVersion,
+    long publicationRevision,
+    UUID latestEventId,
+    String publicPath,
+    Instant updatedAt) {}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/PublicationEventTypeView.java

@@ -0,0 +1,8 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+/** 계약 {@code PublicationEventType}. */
+public enum PublicationEventTypeView {
+  PUBLISHED,
+  REPUBLISHED,
+  UNPUBLISHED
+}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/PublicationEventView.java

@@ -0,0 +1,19 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+import java.time.Instant;
+import java.util.UUID;
+
+/**
+ * 계약 {@code PublicationEvent}. 불변 이력이며 생성 후 수정하지 않는다.
+ *
+ * @param sourcePublishedEventId {@code UNPUBLISHED} 이벤트가 참조하는 마지막 공개 Snapshot의 Event id
+ */
+public record PublicationEventView(
+    UUID publicationEventId,
+    UUID publicationId,
+    UUID documentId,
+    PublicationEventTypeView type,
+    Instant occurredAt,
+    long publishedVersion,
+    UUID sourcePublishedEventId,
+    boolean snapshotAvailable) {}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/PublicationListItemView.java

@@ -0,0 +1,15 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+import java.util.List;
+
+/** 계약 {@code PublicationListItem}. */
+public record PublicationListItemView(
+    PublicationEventView event,
+    PublicationAggregateView publication,
+    DocumentSummaryView document,
+    List<PublicationActionView> availableActions) {
+
+  public PublicationListItemView {
+    availableActions = availableActions == null ? List.of() : List.copyOf(availableActions);
+  }
+}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/PublicationPageView.java

@@ -0,0 +1,11 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+import java.util.List;
+
+/** 계약 {@code PublicationPage}. */
+public record PublicationPageView(List<PublicationListItemView> items, String nextCursor) {
+
+  public PublicationPageView {
+    items = items == null ? List.of() : List.copyOf(items);
+  }
+}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/PublicationSnapshotView.java

@@ -0,0 +1,10 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+/**
+ * 계약 {@code PublicationSnapshot}. 게시 시점의 불변 {@code PublicRenderModel} 이며 현재 source 로 다시 만들지 않는다.
+ */
+public record PublicationSnapshotView(
+    PublicationEventView event,
+    String renderModelJson,
+    String contentFormatVersion,
+    String rendererContractVersion) {}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/PublicationStatusView.java

@@ -0,0 +1,8 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+/** 계약 {@code PublicationStatus}. */
+public enum PublicationStatusView {
+  NEVER_PUBLISHED,
+  PUBLISHED,
+  UNPUBLISHED
+}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/PublishResultView.java

@@ -0,0 +1,4 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+/** 계약 {@code PublishResult}. */
+public record PublishResultView(PublicationAggregateView publication, PublicationEventView event) {}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/QuestionOptionView.java

@@ -0,0 +1,6 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+import java.util.UUID;
+
+/** 계약 {@code QuestionOption}. */
+public record QuestionOptionView(UUID id, String title, String description, int order) {}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/QuestionResolutionView.java

@@ -0,0 +1,6 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+import java.util.UUID;
+
+/** 계약 {@code QuestionResolution}. */
+public record QuestionResolutionView(String summary, UUID evidenceTargetId, String linkLabel) {}

src/application-core/src/main/java/dev/caskeleton/application/techlog/studio/model/QuestionStatusView.java

@@ -0,0 +1,10 @@
+package dev.caskeleton.application.techlog.studio.model;
+
+/**
+ * 계약의 축약 상태(ADR-003). Domain의 {@code OPEN}/{@code INVESTIGATING}/{@code PAUSED}가 모두 {@link #OPEN}으로
+ * 보이며, 그 역방향 변환은 Domain 상태를 덮어쓰지 않는다.
+ */
+public enum QuestionStatusView {
+  OPEN,
+  RESOLVED
+}