feat: 홈과 주제의 최근 기록이 게시된 Open Question 을 담는다

질문을 게시해도 홈 최근 기록에 나오지 않았다. 백엔드가 담지 않은 것이 아니라 담을 수
없었다 — 계약의 `LatestEntry.entryType` 이 CASE/REFERENCE/PROJECT_ACTIVITY/RELEASE 넷만
허용했고, 계약 밖 값을 응답 매퍼에 넘기면 500 이 되어 홈 화면 전체를 못 쓰게 만들기 때문에
질의가 먼저 걸러 내고 있었다.

계약을 넓혔으므로(design-package ef49d3a) 걸러 낼 이유가 사라졌다. `LATEST_ENTRY_TYPES` 에
`QUESTION` 을 더한다. `pathOf` 는 이미 `/questions/{slug}` 를 만들고 있었고, projection 에도
질문 행이 `ACTIVE`/`PUBLIC` 으로 `navigation_path` 까지 채워진 채 들어 있었다 — 막고 있던
것은 이 `IN` 목록 하나였다.

`LATEST_ENTRY_TYPES` 는 홈과 주제 상세가 함께 쓴다. 두 목록의 의미가 같으므로 한 곳만
넓히면 둘 다 따라오고, 그것이 의도다. 두 화면 각각에 "게시한 Open Question 이 목록에
나온다"는 단언을 세워 둔다 — 유형 허용 목록만 검사하면 담기지 않아도 통과한다.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0189NzCryfeqDzS81EWidnBx

docs/registries/env-keys.yaml

@@ -112,6 +112,22 @@ env_keys:
     compatibility_impact: behavior-change
     required_test: env-contract:server-shutdown-timeout-aligned
 
+  - name: APP_SESSION_TIMEOUT
+    # source: Studio 작성 세션. Spring 기본 30분 유휴 만료는 한 기록을 여러 번 저장하며
+    #         오래 머무는 작성 리듬보다 짧아, 저장하지 않은 편집을 잃는 원인이 되었다.
+    #         늘릴수록 훔친 session cookie 가 유효한 창도 같이 늘어나므로 Keycloak realm 의
+    #         SSO idle 과 함께 맞춘다.
+    type: duration
+    default: 8h
+    allowed_values: null
+    classification: public-config
+    required: false
+    reload_policy: restart-only
+    owner_branch: feature-env-driven-runtime-configuration
+    validation: spring_duration_shorthand
+    compatibility_impact: behavior-change
+    required_test: env-contract:session-timeout
+
   - name: APP_SERVER_FORWARD_HEADERS_STRATEGY
     # source: feature-env-driven-runtime-configuration D2 (2026-06-05) — APP_ unification
     #         (trust X-Forwarded-* when behind LB/proxy)

docs/registries/error-codes.yaml

@@ -960,7 +960,12 @@ errors:
     compatibility_impact: additive
     required_test: StudioErrorTest
 
-  # source: studio-v1.yaml ApiError.code — DOCUMENT_NOT_FOUND (StudioError.DOCUMENT_NOT_FOUND)
+  # source: studio-v1.yaml + studio-management-v1.yaml ApiError.code — DOCUMENT_NOT_FOUND
+  #         (StudioError.DOCUMENT_NOT_FOUND, ManagementError.DOCUMENT_NOT_FOUND)
+  #
+  #         두 표면이 같은 코드를 쓴다. 이 레지스트리의 식별자는 code 하나뿐이므로 행도 하나다 —
+  #         한때 표면마다 행을 두고 문구를 다르게 적었고("작업본을 찾을 수 없습니다"), 그 중복이
+  #         레지스트리 로딩 자체를 깨뜨렸다. 같은 코드는 같은 말을 해야 한다.
   - code: DOCUMENT_NOT_FOUND
     category: NOT_FOUND
     http_status: 404
@@ -1403,19 +1408,6 @@ errors:
     runbook_link: null
     compatibility_impact: additive
     required_test: ManagementErrorRegistryTest
-  # source: studio-management-v1.yaml ApiError.code — DOCUMENT_NOT_FOUND (ManagementError.DOCUMENT_NOT_FOUND)
-  - code: DOCUMENT_NOT_FOUND
-    category: NOT_FOUND
-    http_status: 404
-    retryable: false
-    retry_after_seconds: null
-    owner_branch: feature-techlog-management-v1
-    owner_layer: application
-    client_safe_message: "작업본을 찾을 수 없습니다"
-    log_level: INFO
-    runbook_link: null
-    compatibility_impact: additive
-    required_test: ManagementErrorRegistryTest
   # source: studio-management-v1.yaml ApiError.code — DOCUMENT_PUBLISHED (ManagementError.DOCUMENT_PUBLISHED)
   - code: DOCUMENT_PUBLISHED
     category: CONFLICT

src/adapter/inbound/web/src/main/java/dev/caskeleton/adapter/inbound/web/techlog/management/ManagementClientSafeMessages.java

@@ -26,7 +26,7 @@ public final class ManagementClientSafeMessages {
       case RELEASE_NOT_FOUND -> "요청한 릴리즈를 찾을 수 없습니다";
       case RELEASE_VERSION_TAKEN -> "같은 버전의 릴리즈가 이미 있습니다";
       case RELEASE_NOT_PUBLISHABLE -> "지금 상태에서는 발행할 수 없습니다";
-      case DOCUMENT_NOT_FOUND -> "작업본을 찾을 수 없습니다";
+      case DOCUMENT_NOT_FOUND -> "요청한 문서를 찾을 수 없습니다";
       case DOCUMENT_PUBLISHED -> "공개된 기록은 삭제할 수 없습니다. 먼저 공개를 취소해 주세요";
       case DOCUMENT_IN_USE -> "이 기록을 참조하는 곳이 있어 삭제할 수 없습니다";
       case QUESTION_NOT_FOUND -> "질문을 찾을 수 없습니다";

src/adapter/inbound/web/src/main/java/dev/caskeleton/adapter/inbound/web/techlog/management/controller/ManagementHomeFocusController.java

@@ -0,0 +1,53 @@
+package dev.caskeleton.adapter.inbound.web.techlog.management.controller;
+
+import dev.caskeleton.adapter.inbound.web.auth.AuthenticatedPrincipal;
+import dev.caskeleton.adapter.inbound.web.techlog.management.ManagementPrincipals;
+import dev.caskeleton.adapter.inbound.web.techlog.management.api.model.HomeFocusRequest;
+import dev.caskeleton.adapter.inbound.web.techlog.management.api.model.HomeFocusResponse;
+import dev.caskeleton.adapter.inbound.web.techlog.management.mapper.ManagementResponseMapper;
+import dev.caskeleton.application.techlog.management.command.UpdateHomeFocusCommand;
+import dev.caskeleton.application.techlog.management.service.GetHomeFocusUseCase;
+import dev.caskeleton.application.techlog.management.service.UpdateHomeFocusUseCase;
+import org.springframework.security.core.annotation.AuthenticationPrincipal;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * 홈 focus 설정. 계약 {@code getHomeFocus}/{@code updateHomeFocus}.
+ *
+ * <p>단일 행이라 경로에 id 가 없다. 낙관적 잠금은 본문의 {@code expectedVersion} 으로만 한다.
+ */
+@RestController
+public class ManagementHomeFocusController {
+
+  private final GetHomeFocusUseCase getHomeFocus;
+  private final UpdateHomeFocusUseCase updateHomeFocus;
+
+  public ManagementHomeFocusController(
+      GetHomeFocusUseCase getHomeFocus, UpdateHomeFocusUseCase updateHomeFocus) {
+    this.getHomeFocus = getHomeFocus;
+    this.updateHomeFocus = updateHomeFocus;
+  }
+
+  @GetMapping("/v1/studio/home/focus")
+  public HomeFocusResponse getHomeFocus() {
+    return ManagementResponseMapper.homeFocus(getHomeFocus.handle());
+  }
+
+  @PutMapping("/v1/studio/home/focus")
+  public HomeFocusResponse updateHomeFocus(
+      @AuthenticationPrincipal AuthenticatedPrincipal principal,
+      @RequestBody HomeFocusRequest body) {
+    return ManagementResponseMapper.homeFocus(
+        updateHomeFocus.handle(
+            new UpdateHomeFocusCommand(
+                body.getExpectedVersion(),
+                body.getDefaultType() == null ? null : body.getDefaultType().getValue(),
+                body.getCurrentProjectId(),
+                body.getOpenQuestionId(),
+                body.getRecentDecisionId(),
+                ManagementPrincipals.require(principal))));
+  }
+}

src/adapter/inbound/web/src/main/java/dev/caskeleton/adapter/inbound/web/techlog/management/controller/ManagementProjectActivityController.java

@@ -0,0 +1,114 @@
+package dev.caskeleton.adapter.inbound.web.techlog.management.controller;
+
+import dev.caskeleton.adapter.inbound.web.auth.AuthenticatedPrincipal;
+import dev.caskeleton.adapter.inbound.web.techlog.management.ManagementPrincipals;
+import dev.caskeleton.adapter.inbound.web.techlog.management.api.model.ExpectedVersionRequest;
+import dev.caskeleton.adapter.inbound.web.techlog.management.api.model.ProjectActivityRequest;
+import dev.caskeleton.adapter.inbound.web.techlog.management.api.model.ProjectActivityResponse;
+import dev.caskeleton.adapter.inbound.web.techlog.management.api.model.UpdateProjectActivityRequest;
+import dev.caskeleton.adapter.inbound.web.techlog.management.mapper.ManagementResponseMapper;
+import dev.caskeleton.application.techlog.management.command.CreateProjectActivityCommand;
+import dev.caskeleton.application.techlog.management.command.UpdateProjectActivityCommand;
+import dev.caskeleton.application.techlog.management.service.CreateProjectActivityUseCase;
+import dev.caskeleton.application.techlog.management.service.DeleteProjectActivityUseCase;
+import dev.caskeleton.application.techlog.management.service.ListStudioProjectActivitiesUseCase;
+import dev.caskeleton.application.techlog.management.service.UpdateProjectActivityUseCase;
+import java.time.OffsetDateTime;
+import java.util.List;
+import java.util.UUID;
+import org.springframework.http.HttpStatus;
+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.ResponseStatus;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * 프로젝트 활동. 계약 {@code listStudioProjectActivities}/{@code createProjectActivity}/{@code
+ * updateProjectActivity}/{@code deleteProjectActivity}.
+ *
+ * <p>공개 프로젝트 화면의 "활동" 은 {@code project_activity} 를 직접 읽는다 — 투영을 거치지 않으므로 여기서 만든 줄이 곧 그 화면이다.
+ */
+@RestController
+public class ManagementProjectActivityController {
+
+  private final ListStudioProjectActivitiesUseCase listActivities;
+  private final CreateProjectActivityUseCase createActivity;
+  private final UpdateProjectActivityUseCase updateActivity;
+  private final DeleteProjectActivityUseCase deleteActivity;
+
+  public ManagementProjectActivityController(
+      ListStudioProjectActivitiesUseCase listActivities,
+      CreateProjectActivityUseCase createActivity,
+      UpdateProjectActivityUseCase updateActivity,
+      DeleteProjectActivityUseCase deleteActivity) {
+    this.listActivities = listActivities;
+    this.createActivity = createActivity;
+    this.updateActivity = updateActivity;
+    this.deleteActivity = deleteActivity;
+  }
+
+  @GetMapping("/v1/studio/projects/{id}/activities")
+  public List<ProjectActivityResponse> listStudioProjectActivities(@PathVariable("id") UUID id) {
+    return ManagementResponseMapper.projectActivities(listActivities.handle(id));
+  }
+
+  @PostMapping("/v1/studio/projects/{id}/activities")
+  @ResponseStatus(HttpStatus.CREATED)
+  public ProjectActivityResponse createProjectActivity(
+      @AuthenticationPrincipal AuthenticatedPrincipal principal,
+      @PathVariable("id") UUID id,
+      @RequestBody ProjectActivityRequest body) {
+    return ManagementResponseMapper.projectActivity(
+        createActivity.handle(
+            new CreateProjectActivityCommand(
+                id,
+                body.getExpectedProjectVersion(),
+                body.getActivityType(),
+                body.getTitle(),
+                body.getSummary(),
+                body.getVisibility() == null ? null : body.getVisibility().getValue(),
+                body.getRelatedResourceType(),
+                body.getRelatedResourceId(),
+                instant(body.getOccurredAt()),
+                ManagementPrincipals.require(principal))));
+  }
+
+  @PutMapping("/v1/studio/projects/{id}/activities/{activityId}")
+  public ProjectActivityResponse updateProjectActivity(
+      @AuthenticationPrincipal AuthenticatedPrincipal principal,
+      @PathVariable("id") UUID id,
+      @PathVariable("activityId") UUID activityId,
+      @RequestBody UpdateProjectActivityRequest body) {
+    return ManagementResponseMapper.projectActivity(
+        updateActivity.handle(
+            new UpdateProjectActivityCommand(
+                id,
+                activityId,
+                body.getExpectedVersion(),
+                body.getTitle(),
+                body.getSummary(),
+                body.getVisibility() == null ? null : body.getVisibility().getValue(),
+                instant(body.getOccurredAt()),
+                ManagementPrincipals.require(principal))));
+  }
+
+  @DeleteMapping("/v1/studio/projects/{id}/activities/{activityId}")
+  @ResponseStatus(HttpStatus.NO_CONTENT)
+  public void deleteProjectActivity(
+      @AuthenticationPrincipal AuthenticatedPrincipal principal,
+      @PathVariable("id") UUID id,
+      @PathVariable("activityId") UUID activityId,
+      @RequestBody ExpectedVersionRequest body) {
+    deleteActivity.handle(
+        id, activityId, body.getExpectedVersion(), ManagementPrincipals.require(principal));
+  }
+
+  private static java.time.Instant instant(OffsetDateTime value) {
+    return value == null ? null : value.toInstant();
+  }
+}

src/adapter/inbound/web/src/main/java/dev/caskeleton/adapter/inbound/web/techlog/management/controller/ManagementProjectController.java

@@ -8,6 +8,8 @@ import dev.caskeleton.adapter.inbound.web.techlog.management.api.model.ExpectedV
 import dev.caskeleton.adapter.inbound.web.techlog.management.api.model.ProjectEditResponse;
 import dev.caskeleton.adapter.inbound.web.techlog.management.api.model.ProjectIndexPage;
 import dev.caskeleton.adapter.inbound.web.techlog.management.api.model.ProjectUpdateRequest;
+import dev.caskeleton.adapter.inbound.web.techlog.management.api.model.PublishRequest;
+import dev.caskeleton.adapter.inbound.web.techlog.management.api.model.PublishResponse;
 import dev.caskeleton.adapter.inbound.web.techlog.management.mapper.ManagementResponseMapper;
 import dev.caskeleton.application.techlog.management.command.CreateProjectCommand;
 import dev.caskeleton.application.techlog.management.command.DeleteProjectCommand;
@@ -16,6 +18,8 @@ import dev.caskeleton.application.techlog.management.service.CreateProjectUseCas
 import dev.caskeleton.application.techlog.management.service.DeleteProjectUseCase;
 import dev.caskeleton.application.techlog.management.service.GetProjectForEditUseCase;
 import dev.caskeleton.application.techlog.management.service.ListStudioProjectsUseCase;
+import dev.caskeleton.application.techlog.management.service.PublishProjectUseCase;
+import dev.caskeleton.application.techlog.management.service.UnpublishProjectUseCase;
 import dev.caskeleton.application.techlog.management.service.UpdateProjectUseCase;
 import java.util.List;
 import java.util.UUID;
@@ -41,17 +45,24 @@ public class ManagementProjectController {
   private final UpdateProjectUseCase updateProject;
   private final DeleteProjectUseCase deleteProject;
 
+  private final PublishProjectUseCase publishProject;
+  private final UnpublishProjectUseCase unpublishProject;
+
   public ManagementProjectController(
       ListStudioProjectsUseCase listProjects,
       GetProjectForEditUseCase getProject,
       CreateProjectUseCase createProject,
       UpdateProjectUseCase updateProject,
-      DeleteProjectUseCase deleteProject) {
+      DeleteProjectUseCase deleteProject,
+      PublishProjectUseCase publishProject,
+      UnpublishProjectUseCase unpublishProject) {
     this.listProjects = listProjects;
     this.getProject = getProject;
     this.createProject = createProject;
     this.updateProject = updateProject;
     this.deleteProject = deleteProject;
+    this.publishProject = publishProject;
+    this.unpublishProject = unpublishProject;
   }
 
   @GetMapping("/v1/studio/projects")
@@ -98,6 +109,7 @@ public class ManagementProjectController {
                 body.getCurrentObjective(),
                 body.getNextStep(),
                 labels,
+                body.getTopicIds() == null ? List.of() : List.copyOf(body.getTopicIds()),
                 body.getTargetVisibility().getValue(),
                 body.getFeaturedOrder(),
                 ManagementPrincipals.require(principal))));
@@ -113,4 +125,27 @@ public class ManagementProjectController {
         new DeleteProjectCommand(
             id, body.getExpectedVersion(), ManagementPrincipals.require(principal)));
   }
+
+  @PostMapping("/v1/studio/projects/{id}/publish")
+  public PublishResponse publishProject(
+      @AuthenticationPrincipal AuthenticatedPrincipal principal,
+      @PathVariable("id") UUID id,
+      @RequestBody PublishRequest body) {
+    return ManagementResponseMapper.projectPublication(
+        publishProject.handle(
+            id,
+            body.getExpectedVersion(),
+            body.getVisibility() == null ? null : body.getVisibility().getValue(),
+            ManagementPrincipals.require(principal)));
+  }
+
+  @PostMapping("/v1/studio/projects/{id}/unpublish")
+  public ProjectEditResponse unpublishProject(
+      @AuthenticationPrincipal AuthenticatedPrincipal principal,
+      @PathVariable("id") UUID id,
+      @RequestBody ExpectedVersionRequest body) {
+    return ManagementResponseMapper.project(
+        unpublishProject.handle(
+            id, body.getExpectedVersion(), ManagementPrincipals.require(principal)));
+  }
 }

src/adapter/inbound/web/src/main/java/dev/caskeleton/adapter/inbound/web/techlog/management/mapper/ManagementResponseMapper.java

@@ -1,7 +1,9 @@
 package dev.caskeleton.adapter.inbound.web.techlog.management.mapper;
 
 import dev.caskeleton.adapter.inbound.web.techlog.management.api.model.CreateDraftResponse;
+import dev.caskeleton.adapter.inbound.web.techlog.management.api.model.HomeFocusResponse;
 import dev.caskeleton.adapter.inbound.web.techlog.management.api.model.PageMetadata;
+import dev.caskeleton.adapter.inbound.web.techlog.management.api.model.ProjectActivityResponse;
 import dev.caskeleton.adapter.inbound.web.techlog.management.api.model.ProjectEditResponse;
 import dev.caskeleton.adapter.inbound.web.techlog.management.api.model.ProjectIndexItem;
 import dev.caskeleton.adapter.inbound.web.techlog.management.api.model.ProjectIndexPage;
@@ -11,6 +13,8 @@ import dev.caskeleton.adapter.inbound.web.techlog.management.api.model.ReleaseEd
 import dev.caskeleton.adapter.inbound.web.techlog.management.api.model.ReleaseIndexItem;
 import dev.caskeleton.adapter.inbound.web.techlog.management.api.model.ReleaseIndexPage;
 import dev.caskeleton.adapter.inbound.web.techlog.management.api.model.TopicEdit;
+import dev.caskeleton.application.techlog.management.model.HomeFocusConfigView;
+import dev.caskeleton.application.techlog.management.model.ProjectActivityView;
 import dev.caskeleton.application.techlog.management.model.ProjectEditView;
 import dev.caskeleton.application.techlog.management.model.ProjectIndexItemView;
 import dev.caskeleton.application.techlog.management.model.ReleaseEditView;
@@ -85,7 +89,7 @@ public final class ManagementResponseMapper {
     model.setNextStep(view.nextStep());
     model.setTechnologyLabels(List.copyOf(view.technologyLabels()));
     model.setFeaturedOrder(view.featuredOrder());
-    model.setTopicIds(List.of());
+    model.setTopicIds(List.copyOf(view.topicIds()));
     model.setDocumentLinks(List.of());
     model.setQuestionLinks(List.of());
     return model;
@@ -188,6 +192,52 @@ public final class ManagementResponseMapper {
         pageMetadata(page.number(), page.size(), page.totalElements(), page.totalPages()));
   }
 
+  /** 홈 focus 설정. 세 슬롯은 비어 있을 수 있고, 비어 있음이 곧 "고르지 않았다"는 뜻이다. */
+  public static HomeFocusResponse homeFocus(HomeFocusConfigView view) {
+    HomeFocusResponse response = new HomeFocusResponse(view.id(), view.version());
+    response.setDefaultType(view.defaultType());
+    response.setCurrentProjectId(view.currentProjectId());
+    response.setOpenQuestionId(view.openQuestionId());
+    response.setRecentDecisionId(view.recentDecisionId());
+    return response;
+  }
+
+  /** 프로젝트 게시 결과. canonical path 는 공개 조회가 쓰는 {@code /projects/<slug>} 와 같은 규칙으로 만든다. */
+  public static PublishResponse projectPublication(ProjectEditView view) {
+    return new PublishResponse(
+        view.id(),
+        PublishResponse.StatusEnum.PUBLISHED,
+        "UNLISTED".equals(view.targetVisibility())
+            ? PublishResponse.VisibilityEnum.UNLISTED
+            : PublishResponse.VisibilityEnum.PUBLIC,
+        "/projects/" + view.slug(),
+        at(view.lastPublishedAt()),
+        view.version());
+  }
+
+  /** 프로젝트 활동 한 줄. {@code origin} 을 그대로 실어 보낸다 — 화면이 지울 수 있는 줄과 아닌 줄을 그것으로 가른다. */
+  public static ProjectActivityResponse projectActivity(ProjectActivityView view) {
+    ProjectActivityResponse response =
+        new ProjectActivityResponse(
+            view.id(),
+            view.projectId(),
+            view.activityType(),
+            view.title(),
+            view.visibility(),
+            view.origin(),
+            at(view.occurredAt()),
+            view.version());
+    response.setSummary(view.summary());
+    response.setRelatedResourceType(view.relatedResourceType());
+    response.setRelatedResourceId(view.relatedResourceId());
+    return response;
+  }
+
+  public static java.util.List<ProjectActivityResponse> projectActivities(
+      java.util.List<ProjectActivityView> views) {
+    return views.stream().map(ManagementResponseMapper::projectActivity).toList();
+  }
+
   private static String nullToEmpty(String value) {
     return value == null ? "" : value;
   }

src/adapter/inbound/web/src/main/java/dev/caskeleton/adapter/inbound/web/techlog/publicapi/mapper/DocumentResponseMapper.java

@@ -11,6 +11,7 @@ import dev.caskeleton.adapter.inbound.web.techlog.publicapi.api.model.QuestionPo
 import dev.caskeleton.adapter.inbound.web.techlog.publicapi.api.model.QuestionUpdatePublic;
 import dev.caskeleton.adapter.inbound.web.techlog.publicapi.api.model.ReferenceDetailResponse;
 import dev.caskeleton.adapter.inbound.web.techlog.publicapi.api.model.ReferenceDetailResponseReference;
+import dev.caskeleton.adapter.inbound.web.techlog.publicapi.api.model.ReferenceDetailResponseReferenceRulesInner;
 import dev.caskeleton.adapter.inbound.web.techlog.publicapi.api.model.ReferenceDetailResponseRelations;
 import dev.caskeleton.application.techlog.publicsite.model.CaseDetailView;
 import dev.caskeleton.application.techlog.publicsite.model.PublishedDocumentView;
@@ -36,6 +37,7 @@ public final class DocumentResponseMapper {
     PublishedDocumentView doc = view.document();
     CaseDetailResponseCase body = new CaseDetailResponseCase();
     body.setTitle(doc.title());
+    body.setSummary(doc.summary());
     body.setProblemSummary(doc.primarySummary());
     body.setConclusionSummary(doc.secondarySummary());
     body.setEnvironmentSummary(doc.environmentSummary());
@@ -71,9 +73,17 @@ public final class DocumentResponseMapper {
     PublishedDocumentView doc = view.document();
     ReferenceDetailResponseReference body = new ReferenceDetailResponseReference();
     body.setTitle(doc.title());
+    body.setSummary(doc.summary());
     body.setScopeSummary(doc.primarySummary());
     body.setAppliesTo(doc.appliesTo());
     body.setExcludedScope(doc.excludedScope());
+    // Reference 의 본문은 `content` 가 아니라 여기 있다 — 이것을 빼면 공개 화면에 판단 기준과
+    // 예시가 통째로 빠진다.
+    body.setRules(
+        doc.rules().stream()
+            .map(rule -> new ReferenceDetailResponseReferenceRulesInner(rule.title(), rule.body()))
+            .toList());
+    body.setExamples(doc.examples());
     body.setFreshnessStatus(
         ReferenceDetailResponseReference.FreshnessStatusEnum.fromValue(doc.freshnessStatus()));
     body.setContent(doc.content());

src/adapter/inbound/web/src/main/java/dev/caskeleton/adapter/inbound/web/techlog/publicapi/mapper/ProjectResponseMapper.java

@@ -9,6 +9,7 @@ import dev.caskeleton.adapter.inbound.web.techlog.publicapi.api.model.ProjectDet
 import dev.caskeleton.adapter.inbound.web.techlog.publicapi.api.model.ProjectListItem;
 import dev.caskeleton.adapter.inbound.web.techlog.publicapi.api.model.ProjectListResponse;
 import dev.caskeleton.adapter.inbound.web.techlog.publicapi.api.model.ProjectRecordPage;
+import dev.caskeleton.adapter.inbound.web.techlog.publicapi.api.model.TopicSummary;
 import dev.caskeleton.application.techlog.publicsite.model.ProjectActivityItemView;
 import dev.caskeleton.application.techlog.publicsite.model.ProjectActivityPageView;
 import dev.caskeleton.application.techlog.publicsite.model.ProjectDecisionItemView;
@@ -56,6 +57,8 @@ public final class ProjectResponseMapper {
     body.setNextStep(p.nextStep());
     body.setSystemOverviewMarkdown(p.systemOverviewMarkdown());
     body.setTechnologies(p.technologies());
+    body.setTopics(
+        p.topics().stream().map(topic -> new TopicSummary(topic.name(), topic.slug())).toList());
     body.setUpdatedAt(PublicResponseMapper.at(p.updatedAt()));
 
     ProjectDetailResponse dto = new ProjectDetailResponse();

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

@@ -28,7 +28,6 @@ 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;

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

@@ -8,10 +8,12 @@ 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.ImageBlock;
 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.ThematicBreakBlock;
 import dev.caskeleton.adapter.inbound.web.techlog.studio.api.model.UnorderedListBlock;
 import java.util.ArrayList;
 import java.util.List;
@@ -24,6 +26,7 @@ import org.commonmark.node.BlockQuote;
 import org.commonmark.node.BulletList;
 import org.commonmark.node.FencedCodeBlock;
 import org.commonmark.node.Heading;
+import org.commonmark.node.Image;
 import org.commonmark.node.IndentedCodeBlock;
 import org.commonmark.node.Node;
 import org.commonmark.node.OrderedList;
@@ -38,10 +41,13 @@ import org.commonmark.node.ThematicBreak;
  */
 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;
+   * 계약 {@code HeadingBlock.level} 은 1..6 이다(studio-v1 3.1.0). 예전에는 2..4 였고 h1/h5/h6 를 이 범위로 접었는데,
+   * 그러면 작성자가 쓴 위계가 화면에서 달라진다. 지금은 그대로 담는다.
+   */
+  private static final int MIN_HEADING_LEVEL = 1;
 
-  private static final int MAX_HEADING_LEVEL = 4;
+  private static final int MAX_HEADING_LEVEL = 6;
 
   private final HeadingIds headingIds;
   private final List<String> warnings;
@@ -67,18 +73,18 @@ final class BlockRenderer {
   private CaseRenderBlock renderBlock(Node node) {
     return switch (node) {
       case Heading value -> heading(value);
-      case Paragraph value -> paragraph(InlineRenderer.render(value));
+      case Paragraph value -> paragraphOrImage(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);
+      // 계약에 수평선 타입이 생겼다(studio-v1 3.1.0). 예전에는 담을 곳이 없어 버리고 경고했다.
       case ThematicBreak ignored -> {
-        // 계약의 CaseRenderBlock 에 수평선 타입이 없다. 다른 블록으로 바꿔 넣으면 원문에 없던
+        ThematicBreakBlock block = new ThematicBreakBlock();
-        // 구조가 생기므로 버리고 경고한다.
+        block.setType(ThematicBreakBlock.TypeEnum.THEMATIC_BREAK);
-        warnings.add("THEMATIC_BREAK_NOT_RENDERABLE");
+        yield block;
-        yield null;
       }
       default -> {
         List<Inline> content = InlineRenderer.render(node);
@@ -87,6 +93,47 @@ final class BlockRenderer {
     };
   }
 
+  /**
+   * 문단 하나에 그림만 있으면 그림 블록으로 읽는다.
+   *
+   * <p>Markdown 에서 {@code ![alt](/media/...)} 는 문단 안의 inline 인데 계약의 Inline union 에는 그림이 없다. 예전에는
+   * 그래서 대체 텍스트만 남기고 그림을 버렸다. 계약에 블록이 생겼으므로 (studio-v1 3.1.0) 문단이 그림 하나로만 이루어진 경우를 블록으로 올린다.
+   *
+   * <p>주소는 상대 경로이거나 http(s) 여야 한다 — {@code javascript:} 같은 스킴이 화면에 그대로 실리면 안 된다.
+   */
+  private CaseRenderBlock paragraphOrImage(Paragraph value) {
+    Node only = value.getFirstChild();
+    if (only instanceof Image image && only == value.getLastChild()) {
+      String source = image.getDestination();
+      if (isRenderableImageSource(source)) {
+        ImageBlock block = new ImageBlock();
+        block.setType(ImageBlock.TypeEnum.IMAGE);
+        block.setSrc(source);
+        block.setAlt(InlineRenderer.plainText(image));
+        block.setTitle(image.getTitle());
+        return block;
+      }
+      warnings.add("IMAGE_SOURCE_NOT_RENDERABLE");
+    }
+    return paragraph(InlineRenderer.render(value));
+  }
+
+  private static boolean isRenderableImageSource(String source) {
+    if (source == null || source.isBlank()) {
+      return false;
+    }
+    // 프로토콜 상대 주소(`//host/…`)는 앱 경로가 아니다. 아래의 단일 슬래시 검사보다 먼저 걸러야
+    // 한다 — 순서를 바꾸면 외부 호스트를 내부 경로로 오인한다.
+    if (source.startsWith("//")) {
+      return false;
+    }
+    if (source.startsWith("/")) {
+      return true;
+    }
+    String lower = source.toLowerCase(java.util.Locale.ROOT);
+    return lower.startsWith("http://") || lower.startsWith("https://");
+  }
+
   private CaseRenderBlock heading(Heading value) {
     HeadingBlock block = new HeadingBlock();
     block.setType(HeadingBlock.TypeEnum.HEADING);

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

@@ -57,9 +57,10 @@ class StudioContentRendererTest {
     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.
+    // 계약의 HeadingBlock.level 은 1..6 이다(studio-v1 3.1.0). 예전에는 2..4 라 h1/h6 를 접었고,
-    assertThat(((HeadingBlock) blocks.get(0)).getLevel()).isEqualTo(2);
+    // 그래서 작성자가 쓴 위계가 화면에서 달라졌다. 지금은 그대로 내보낸다.
-    assertThat(((HeadingBlock) blocks.get(1)).getLevel()).isEqualTo(4);
+    assertThat(((HeadingBlock) blocks.get(0)).getLevel()).isEqualTo(1);
+    assertThat(((HeadingBlock) blocks.get(1)).getLevel()).isEqualTo(6);
 
     assertThat(((HeadingBlock) blocks.get(0)).getId()).isEqualTo("authorization-code-flow");
     assertThat(((HeadingBlock) blocks.get(2)).getId()).isEqualTo("결론");

src/adapter/outbound/persistence-jpa/src/main/java/dev/caskeleton/adapter/outbound/persistence/techlog/management/JdbcHomeFocusConfigAdapter.java

@@ -0,0 +1,104 @@
+package dev.caskeleton.adapter.outbound.persistence.techlog.management;
+
+import dev.caskeleton.application.techlog.management.command.UpdateHomeFocusCommand;
+import dev.caskeleton.application.techlog.management.model.HomeFocusConfigView;
+import dev.caskeleton.application.techlog.management.port.out.HomeFocusConfigPort;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.Optional;
+import java.util.UUID;
+import org.springframework.jdbc.core.simple.JdbcClient;
+import org.springframework.stereotype.Repository;
+
+/**
+ * 홈 focus 설정 저장소.
+ *
+ * <p>{@code home_focus_config} 는 PK 가 고정 UUID 로 CHECK 되어 있는 단일 행 테이블이다. 그래서 조회에 WHERE 가 없고, 갱신은 그
+ * 고정 id 를 그대로 쓴다 — 행이 여러 개일 수 없으므로 "어느 행" 을 고를 일이 없다.
+ *
+ * <p>V9 마이그레이션이 세 슬롯이 모두 비어 있는 행을 미리 넣는다. 따라서 {@link #load()} 는 항상 값을 돌려주며, 빈 결과는 스키마가 깨진 경우뿐이라 그때는
+ * 예외가 맞다.
+ */
+@Repository
+public class JdbcHomeFocusConfigAdapter implements HomeFocusConfigPort {
+
+  private static final UUID ROW_ID = UUID.fromString("00000000-0000-0000-0000-000000000003");
+
+  private static final String COLUMNS =
+      "id, version, default_focus_type, current_project_id, open_question_id, recent_decision_id";
+
+  private final JdbcClient jdbcClient;
+
+  public JdbcHomeFocusConfigAdapter(JdbcClient jdbcClient) {
+    this.jdbcClient = jdbcClient;
+  }
+
+  private static HomeFocusConfigView map(ResultSet rs, int rowNum) throws SQLException {
+    return new HomeFocusConfigView(
+        rs.getObject("id", UUID.class),
+        rs.getLong("version"),
+        rs.getString("default_focus_type"),
+        rs.getObject("current_project_id", UUID.class),
+        rs.getObject("open_question_id", UUID.class),
+        rs.getObject("recent_decision_id", UUID.class));
+  }
+
+  @Override
+  public HomeFocusConfigView load() {
+    return jdbcClient
+        .sql("SELECT " + COLUMNS + " FROM home_focus_config")
+        .query(JdbcHomeFocusConfigAdapter::map)
+        .optional()
+        .orElseThrow(
+            () ->
+                new IllegalStateException("home_focus_config has no row; migration V9 seeds one"));
+  }
+
+  @Override
+  public Optional<HomeFocusConfigView> update(UpdateHomeFocusCommand command) {
+    int updated =
+        jdbcClient
+            .sql(
+                "UPDATE home_focus_config SET default_focus_type = :defaultType,"
+                    + " current_project_id = :projectId, open_question_id = :questionId,"
+                    + " recent_decision_id = :decisionId, version = version + 1,"
+                    + " updated_at = now(), updated_by = :actor"
+                    + " WHERE id = :id AND version = :expected")
+            .param("id", ROW_ID)
+            .param("expected", command.expectedVersion())
+            .param("defaultType", command.defaultType())
+            .param("projectId", command.currentProjectId())
+            .param("questionId", command.openQuestionId())
+            .param("decisionId", command.recentDecisionId())
+            .param("actor", command.actor())
+            .update();
+    return updated == 0 ? Optional.empty() : Optional.of(load());
+  }
+
+  @Override
+  public boolean projectExists(UUID id) {
+    return exists("project", id);
+  }
+
+  @Override
+  public boolean questionExists(UUID id) {
+    return exists("open_question", id);
+  }
+
+  @Override
+  public boolean decisionExists(UUID id) {
+    return exists("project_decision", id);
+  }
+
+  /*
+   * 테이블 이름은 이 클래스 안의 상수 셋에서만 온다 — 호출자가 문자열을 넘길 수 없으므로 연결해도 주입 경로가 없다.
+   */
+  private boolean exists(String table, UUID id) {
+    return jdbcClient
+        .sql("SELECT 1 FROM " + table + " WHERE id = :id")
+        .param("id", id)
+        .query(Integer.class)
+        .optional()
+        .isPresent();
+  }
+}

src/adapter/outbound/persistence-jpa/src/main/java/dev/caskeleton/adapter/outbound/persistence/techlog/management/JdbcProjectActivityRepositoryAdapter.java

@@ -0,0 +1,142 @@
+package dev.caskeleton.adapter.outbound.persistence.techlog.management;
+
+import dev.caskeleton.application.techlog.management.command.CreateProjectActivityCommand;
+import dev.caskeleton.application.techlog.management.command.UpdateProjectActivityCommand;
+import dev.caskeleton.application.techlog.management.model.ProjectActivityView;
+import dev.caskeleton.application.techlog.management.port.out.ProjectActivityRepositoryPort;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+import org.springframework.jdbc.core.simple.JdbcClient;
+import org.springframework.stereotype.Repository;
+
+/**
+ * 프로젝트 활동 편집 저장소.
+ *
+ * <p>{@code origin} 은 이 경로에서 언제나 {@code MANUAL} 이다. 이 어댑터로 들어오는 것은 작성자가 손으로 적은 줄뿐이고, {@code AUTO} 는
+ * 게시 파이프라인이 남기는 몫이다. 클라이언트가 값을 정하게 두면 손으로 적은 줄에 {@code AUTO} 를 붙여 삭제 금지를 우회할 수 있다.
+ *
+ * <p>모든 쓰기에 {@code project_id} 조건이 붙는다. 경로가 프로젝트와 활동을 함께 요구하므로, 활동 id 만으로 수정하면 남의 프로젝트에 달린 줄을 고칠 수
+ * 있다.
+ */
+@Repository
+public class JdbcProjectActivityRepositoryAdapter implements ProjectActivityRepositoryPort {
+
+  private static final String COLUMNS =
+      "id, project_id, activity_type, title, summary, visibility, origin,"
+          + " related_resource_type, related_resource_id, occurred_at, version";
+
+  private final JdbcClient jdbcClient;
+
+  /*
+   * 생성자는 하나뿐이어야 한다. 한때 테스트용 id 생성기를 받는 두 번째 생성자가 있었고, 그러면
+   * 컴포넌트 스캔이 어느 것을 쓸지 정하지 못해 기본 생성자를 찾다가 실패한다 — 컴파일도 테스트도
+   * 통과하고 운영에서 기동만 못 한다. id 는 여기서 만들면 되고, 통합 테스트는 그 값을 볼 필요가 없다.
+   */
+  public JdbcProjectActivityRepositoryAdapter(JdbcClient jdbcClient) {
+    this.jdbcClient = jdbcClient;
+  }
+
+  private static ProjectActivityView map(ResultSet rs, int rowNum) throws SQLException {
+    return new ProjectActivityView(
+        rs.getObject("id", UUID.class),
+        rs.getObject("project_id", UUID.class),
+        rs.getString("activity_type"),
+        rs.getString("title"),
+        rs.getString("summary"),
+        rs.getString("visibility"),
+        rs.getString("origin"),
+        rs.getString("related_resource_type"),
+        rs.getObject("related_resource_id", UUID.class),
+        rs.getTimestamp("occurred_at").toInstant(),
+        rs.getLong("version"));
+  }
+
+  @Override
+  public List<ProjectActivityView> listByProject(UUID projectId) {
+    return jdbcClient
+        .sql(
+            "SELECT "
+                + COLUMNS
+                + " FROM project_activity WHERE project_id = :projectId"
+                + " ORDER BY occurred_at DESC, id DESC")
+        .param("projectId", projectId)
+        .query(JdbcProjectActivityRepositoryAdapter::map)
+        .list();
+  }
+
+  @Override
+  public Optional<ProjectActivityView> find(UUID projectId, UUID activityId) {
+    return jdbcClient
+        .sql(
+            "SELECT "
+                + COLUMNS
+                + " FROM project_activity"
+                + " WHERE project_id = :projectId AND id = :id")
+        .param("projectId", projectId)
+        .param("id", activityId)
+        .query(JdbcProjectActivityRepositoryAdapter::map)
+        .optional();
+  }
+
+  @Override
+  public ProjectActivityView create(CreateProjectActivityCommand command) {
+    UUID id = UUID.randomUUID();
+    jdbcClient
+        .sql(
+            "INSERT INTO project_activity (id, project_id, activity_type, title, summary,"
+                + " visibility, origin, related_resource_type, related_resource_id, occurred_at,"
+                + " created_by, updated_by)"
+                + " VALUES (:id, :projectId, :type, :title, :summary, :visibility, 'MANUAL',"
+                + " :relatedType, :relatedId, :occurredAt, :actor, :actor)")
+        .param("id", id)
+        .param("projectId", command.projectId())
+        .param("type", command.activityType())
+        .param("title", command.title().trim())
+        .param("summary", command.summary())
+        .param("visibility", command.visibility())
+        .param("relatedType", command.relatedResourceType())
+        .param("relatedId", command.relatedResourceId())
+        .param("occurredAt", java.sql.Timestamp.from(command.occurredAt()))
+        .param("actor", command.actor())
+        .update();
+    return find(command.projectId(), id)
+        .orElseThrow(
+            () -> new IllegalStateException("activity vanished right after insert: " + id));
+  }
+
+  @Override
+  public Optional<ProjectActivityView> update(UpdateProjectActivityCommand command) {
+    int updated =
+        jdbcClient
+            .sql(
+                "UPDATE project_activity SET title = :title, summary = :summary,"
+                    + " visibility = :visibility, occurred_at = :occurredAt,"
+                    + " version = version + 1, updated_at = now(), updated_by = :actor"
+                    + " WHERE id = :id AND project_id = :projectId AND version = :expected")
+            .param("id", command.activityId())
+            .param("projectId", command.projectId())
+            .param("expected", command.expectedVersion())
+            .param("title", command.title().trim())
+            .param("summary", command.summary())
+            .param("visibility", command.visibility())
+            .param("occurredAt", java.sql.Timestamp.from(command.occurredAt()))
+            .param("actor", command.actor())
+            .update();
+    return updated == 0 ? Optional.empty() : find(command.projectId(), command.activityId());
+  }
+
+  @Override
+  public int delete(UUID projectId, UUID activityId, long expectedVersion) {
+    return jdbcClient
+        .sql(
+            "DELETE FROM project_activity"
+                + " WHERE id = :id AND project_id = :projectId AND version = :expected")
+        .param("id", activityId)
+        .param("projectId", projectId)
+        .param("expected", expectedVersion)
+        .update();
+  }
+}

src/adapter/outbound/persistence-jpa/src/main/java/dev/caskeleton/adapter/outbound/persistence/techlog/management/JdbcProjectRepositoryAdapter.java

@@ -5,11 +5,15 @@ import dev.caskeleton.application.techlog.management.command.UpdateProjectComman
 import dev.caskeleton.application.techlog.management.model.ProjectEditView;
 import dev.caskeleton.application.techlog.management.model.ProjectIndexItemView;
 import dev.caskeleton.application.techlog.management.port.out.ProjectRepositoryPort;
+import java.nio.charset.StandardCharsets;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.sql.Timestamp;
 import java.time.Instant;
 import java.util.ArrayList;
+import java.util.HexFormat;
 import java.util.List;
 import java.util.Optional;
 import java.util.UUID;
@@ -89,6 +93,7 @@ public class JdbcProjectRepositoryAdapter implements ProjectRepositoryPort {
         rs.getString("current_objective"),
         rs.getString("next_step"),
         labels(rs.getString("technology_labels")),
+        topicIdsOf(rs.getObject("id", UUID.class)),
         rs.getString("workflow_status"),
         rs.getString("target_visibility"),
         (Integer) rs.getObject("featured_order"),
@@ -186,7 +191,44 @@ public class JdbcProjectRepositoryAdapter implements ProjectRepositoryPort {
             .param("featured", command.featuredOrder())
             .param("actor", command.actor())
             .update();
-    return updated == 0 ? Optional.empty() : find(command.id());
+    if (updated == 0) {
+      return Optional.empty();
+    }
+    replaceTopics(command.id(), command.topicIds());
+    return find(command.id());
+  }
+
+  /** 편집기가 고른 주제. 순서가 곧 화면 순서이므로 목록의 자리를 {@code display_order} 에 그대로 적는다. */
+  private List<UUID> topicIdsOf(UUID projectId) {
+    return jdbcClient
+        .sql(
+            "SELECT topic_id FROM project_topic WHERE project_id = :projectId"
+                + " ORDER BY display_order")
+        .param("projectId", projectId)
+        .query(UUID.class)
+        .list();
+  }
+
+  /*
+   * 통째로 교체한다. 부분 수정으로 두면 "주제를 전부 뗀다" 를 표현할 방법이 없고, 화면도 목록 하나를
+   * 한 번에 저장하므로 그쪽과도 맞는다.
+   */
+  private void replaceTopics(UUID projectId, List<UUID> topicIds) {
+    jdbcClient
+        .sql("DELETE FROM project_topic WHERE project_id = :projectId")
+        .param("projectId", projectId)
+        .update();
+    int order = 0;
+    for (UUID topicId : topicIds) {
+      jdbcClient
+          .sql(
+              "INSERT INTO project_topic (project_id, topic_id, display_order)"
+                  + " VALUES (:projectId, :topicId, :order)")
+          .param("projectId", projectId)
+          .param("topicId", topicId)
+          .param("order", order++)
+          .update();
+    }
   }
 
   private static String nullToEmpty(String value) {
@@ -230,4 +272,142 @@ public class JdbcProjectRepositoryAdapter implements ProjectRepositoryPort {
             .query(Boolean.class)
             .single());
   }
+
+  /**
+   * 게시는 세 곳을 한 트랜잭션 안에서 함께 세운다 — 원본의 상태, 공개 투영, canonical route. 어느 하나가 빠지면 증상이 제각각이다: 투영이 없으면 화면이
+   * 조용히 비고, route 가 없으면 주소만 404 가 되며, 원본 상태가 안 바뀌면 Studio 가 계속 "초안" 이라고 말한다.
+   *
+   * <p>낙관적 잠금이 먼저다. 버전이 어긋나면 아래 두 문장은 아예 실행하지 않는다.
+   */
+  @Override
+  public Optional<ProjectEditView> publish(
+      UUID id, long expectedVersion, String visibility, String actor) {
+    int updated =
+        jdbcClient
+            .sql(
+                "UPDATE project SET workflow_status = 'PUBLISHED', target_visibility = :visibility,"
+                    + " first_published_at = COALESCE(first_published_at, now()),"
+                    + " last_published_at = now(), version = version + 1,"
+                    + " updated_at = now(), updated_by = :actor"
+                    + " WHERE id = :id AND version = :expected")
+            .param("id", id)
+            .param("expected", expectedVersion)
+            .param("visibility", visibility)
+            .param("actor", actor)
+            .update();
+    if (updated == 0) {
+      return Optional.empty();
+    }
+
+    ProjectEditView project =
+        find(id)
+            .orElseThrow(() -> new IllegalStateException("project vanished mid-publish: " + id));
+    upsertProjection(project, visibility);
+    replaceRoute(project);
+    return Optional.of(project);
+  }
+
+  @Override
+  public Optional<ProjectEditView> unpublish(UUID id, long expectedVersion, String actor) {
+    int updated =
+        jdbcClient
+            .sql(
+                "UPDATE project SET workflow_status = 'DRAFT', target_visibility = 'PRIVATE',"
+                    + " version = version + 1, updated_at = now(), updated_by = :actor"
+                    + " WHERE id = :id AND version = :expected")
+            .param("id", id)
+            .param("expected", expectedVersion)
+            .param("actor", actor)
+            .update();
+    if (updated == 0) {
+      return Optional.empty();
+    }
+    jdbcClient
+        .sql(
+            "UPDATE public_resource_projection SET publication_state = 'WITHDRAWN',"
+                + " updated_at = now() WHERE resource_type = 'PROJECT' AND resource_id = :id")
+        .param("id", id)
+        .update();
+    return find(id);
+  }
+
+  /**
+   * 공개 조회들은 실제 내용을 {@code project} 테이블에서 직접 읽고 이 행은 가시성 관문·주소·정렬 시각으로만 쓴다. 그래서 {@code payload} 는 빈
+   * 객체로 둔다 — 여기에 사본을 두면 원본이 바뀔 때마다 두 곳이 어긋난다.
+   *
+   * <p>{@code search_text} 만은 예외다. 검색은 이 테이블 하나만 훑으므로 여기에 없는 낱말은 영영 찾을 수 없다.
+   */
+  private void upsertProjection(ProjectEditView project, String visibility) {
+    String searchText =
+        String.join(
+            " ",
+            nullToEmpty(project.name()),
+            nullToEmpty(project.oneLinePurpose()),
+            nullToEmpty(project.purposeMarkdown()),
+            nullToEmpty(project.currentObjective()),
+            nullToEmpty(project.nextStep()));
+    jdbcClient
+        .sql(
+            "INSERT INTO public_resource_projection (resource_type, resource_id, source_version,"
+                + " publication_state, visibility, title, summary, state_code,"
+                + " payload_schema_version, payload, body_plain_text, search_text, content_hash,"
+                + " published_at, updated_at, navigation_path)"
+                + " VALUES ('PROJECT', :id, :version, 'ACTIVE', :visibility, :title, :summary,"
+                + " :stateCode, 1, '{}'::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,"
+                + " 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("id", project.id())
+        .param("version", project.version())
+        .param("visibility", visibility)
+        .param("title", project.name())
+        .param("summary", project.oneLinePurpose())
+        .param("stateCode", project.phase())
+        .param("bodyPlainText", nullToEmpty(project.purposeMarkdown()))
+        .param("searchText", searchText)
+        .param("contentHash", sha256(searchText))
+        .param("navigationPath", "/projects/" + project.slug())
+        .update();
+  }
+
+  /** 이전 slug 의 route 는 alias 로 남긴다 — 지우면 이미 공개된 링크가 끊긴다. */
+  private void replaceRoute(ProjectEditView project) {
+    jdbcClient
+        .sql(
+            "UPDATE public_route SET route_role = 'ALIAS'"
+                + " WHERE resource_type = 'PROJECT' AND resource_id = :id AND slug <> :slug")
+        .param("id", project.id())
+        .param("slug", project.slug())
+        .update();
+    jdbcClient
+        .sql(
+            "INSERT INTO public_route (resource_type, slug, resource_id, route_role)"
+                + " VALUES ('PROJECT', :slug, :id, 'CANONICAL')"
+                + " ON CONFLICT (resource_type, slug) DO UPDATE SET"
+                + " resource_id = EXCLUDED.resource_id, route_role = 'CANONICAL'")
+        .param("id", project.id())
+        .param("slug", project.slug())
+        .update();
+  }
+
+  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/publicsite/JdbcPublicDocumentQueryAdapter.java

@@ -87,7 +87,8 @@ public class JdbcPublicDocumentQueryAdapter implements PublicDocumentQueryPort {
             "SELECT d.id, d.title, d.body_markdown, d.content_format,"
                 + " d.content_format_version, d.cover_asset_id,"
                 // `environment_items` 는 V7 이 만든 jsonb 배열이고, Studio 가 쓰는 것은 V8 이
-                // 따로 만든 `environment`/`reproduction` 문자열이다(V8__techlog_studio_working_copy.sql:23-26).
+                // 따로 만든 `environment`/`reproduction`
+                // 문자열이다(V8__techlog_studio_working_copy.sql:23-26).
                 // 공개 조회가 배열 쪽을 읽는 동안 그 컬럼을 채우는 코드는 어디에도 없었고 —
                 // 작성자가 검증 환경과 재현 조건을 채워도 공개 화면의 두 칸은 늘 비어 있었다.
                 + " c.problem_summary, c.conclusion_summary, c.environment, c.reproduction,"
@@ -96,6 +97,8 @@ public class JdbcPublicDocumentQueryAdapter implements PublicDocumentQueryPort {
                 // 컬럼(`public_resource_projection.last_verified_at`)은 `upsertProjection` 이
                 // 채우지 않아 언제나 null 이었다.
                 + " p.navigation_path, p.published_at, p.updated_at, d.last_verified_at,"
+                + " d.summary,"
+                + " r.rules, r.examples,"
                 + " t.name AS topic_name, t.slug AS topic_slug,"
                 + " pr.name AS project_name, pr.slug AS project_slug,"
                 + " a.content_type AS cover_content_type, a.alt_text AS cover_alt,"
@@ -125,12 +128,16 @@ public class JdbcPublicDocumentQueryAdapter implements PublicDocumentQueryPort {
                       type,
                       rs.getString("navigation_path"),
                       rs.getString("title"),
+                      rs.getString("summary"),
                       // Case 는 문제/결론, Reference 는 범위/적용이 각각 앞뒤 요약 자리에 온다.
                       isCase ? rs.getString("problem_summary") : rs.getString("scope_summary"),
                       isCase ? rs.getString("conclusion_summary") : null,
                       isCase ? environment(rs) : List.of(),
                       isCase ? List.of() : json.strings(rs.getString("applies_to")),
                       isCase ? List.of() : json.strings(rs.getString("excluded_scope")),
+                      // Reference 의 본문은 body_markdown 이 아니라 규칙과 예시에 있다.
+                      isCase ? List.of() : json.referenceRules(rs.getString("rules")),
+                      isCase ? List.of() : json.strings(rs.getString("examples")),
                       isCase ? null : rs.getString("freshness_status"),
                       rs.getString("body_markdown"),
                       rs.getString("content_format"),
@@ -229,8 +236,8 @@ public class JdbcPublicDocumentQueryAdapter implements PublicDocumentQueryPort {
   /**
    * 본문이 {@code :::evidence key="..."} 로 가리키는 Asset.
    *
-   * <p>{@code PUBLISHED} scope 의 참조만 읽는다 — 게시 이후 작업본이 Asset 을 바꿔도 이미 공개된 본문이 가리키는 대상은 달라지지 않아야
+   * <p>{@code PUBLISHED} scope 의 참조만 읽는다 — 게시 이후 작업본이 Asset 을 바꿔도 이미 공개된 본문이 가리키는 대상은 달라지지 않아야 하기
-   * 하기 때문이다. {@code WORKING} scope 는 Studio 의 것이다.
+   * 때문이다. {@code WORKING} scope 는 Studio 의 것이다.
    *
    * <p>{@code READY} 가 아닌 Asset 은 뺀다. {@code /media/{assetId}} 가 그것만 서빙하므로, 넣어 두면 공개 화면이 404 나는 주소를
    * 가리키게 된다.
@@ -275,15 +282,16 @@ public class JdbcPublicDocumentQueryAdapter implements PublicDocumentQueryPort {
   /**
    * 검증 환경과 재현 조건을 공개 계약의 목록 자리에 담는다.
    *
-   * <p>계약은 `environmentSummary` 를 문자열 배열로 두는데 Studio 가 채우는 것은 두 개의 문자열
+   * <p>계약은 `environmentSummary` 를 문자열 배열로 두는데 Studio 가 채우는 것은 두 개의 문자열 (`environment`,
-   * (`environment`, `reproduction`)이다. 여기서는 비어 있지 않은 것만 순서대로 넣는다 — 줄 단위로
+   * `reproduction`)이다. 여기서는 비어 있지 않은 것만 순서대로 넣는다 — 줄 단위로 쪼개는 것은 표현 정책이라 어댑터가 정할 일이 아니다.
-   * 쪼개는 것은 표현 정책이라 어댑터가 정할 일이 아니다.
    */
   static List<String> environment(ResultSet rs) throws SQLException {
     List<String> items = new ArrayList<>(2);
     for (String column : List.of("environment", "reproduction")) {
       String value = rs.getString(column);
-      if (value != null && !value.isBlank()) items.add(value);
+      if (value != null && !value.isBlank()) {
+        items.add(value);
+      }
     }
     return List.copyOf(items);
   }

src/adapter/outbound/persistence-jpa/src/main/java/dev/caskeleton/adapter/outbound/persistence/techlog/publicsite/JdbcPublicProjectQueryAdapter.java

@@ -10,6 +10,7 @@ import dev.caskeleton.application.techlog.publicsite.model.ProjectListItemView;
 import dev.caskeleton.application.techlog.publicsite.model.ProjectRecordPageView;
 import dev.caskeleton.application.techlog.publicsite.model.PublishedProjectView;
 import dev.caskeleton.application.techlog.publicsite.model.RelatedEntryView;
+import dev.caskeleton.application.techlog.publicsite.model.TopicSummaryView;
 import dev.caskeleton.application.techlog.publicsite.port.out.PublicProjectQueryPort;
 import dev.caskeleton.application.techlog.publicsite.query.ProjectDecisionPageQuery;
 import dev.caskeleton.application.techlog.publicsite.query.ProjectPageQuery;
@@ -88,6 +89,7 @@ public class JdbcPublicProjectQueryAdapter implements PublicProjectQueryPort {
                       rs.getString("next_step"),
                       rs.getString("system_overview_markdown"),
                       json.strings(rs.getString("technology_labels")),
+                      topicsOf(projectId),
                       JdbcPublicDocumentQueryAdapter.instant(rs, "updated_at"));
               return new ProjectDetailView(
                   rs.getString("navigation_path"),
@@ -327,4 +329,22 @@ public class JdbcPublicProjectQueryAdapter implements PublicProjectQueryPort {
         .query(UUID.class)
         .optional();
   }
+
+  /**
+   * 프로젝트가 다루는 주제. 화면의 "주요 주제" 가 이 목록을 그린다.
+   *
+   * <p>{@code ACTIVE} 인 주제만 내보낸다 — 보관된 주제를 링크로 내보내면 따라간 곳이 비어 있다. 순서는 편집기가 정한 {@code display_order}
+   * 를 그대로 따른다.
+   */
+  private List<TopicSummaryView> topicsOf(UUID projectId) {
+    return jdbcClient
+        .sql(
+            "SELECT t.name, t.slug FROM project_topic pt"
+                + " JOIN topic t ON t.id = pt.topic_id"
+                + " WHERE pt.project_id = :projectId AND t.status = 'ACTIVE'"
+                + " ORDER BY pt.display_order, t.name")
+        .param("projectId", projectId)
+        .query((rs, rowNum) -> new TopicSummaryView(rs.getString("name"), rs.getString("slug")))
+        .list();
+  }
 }

src/adapter/outbound/persistence-jpa/src/main/java/dev/caskeleton/adapter/outbound/persistence/techlog/publicsite/JdbcPublicSiteQueryAdapter.java

@@ -180,8 +180,8 @@ public class JdbcPublicSiteQueryAdapter implements PublicSiteQueryPort {
   }
 
   /**
-   * 계약 {@code LatestEntry.entryType} 은 {@code CASE / REFERENCE / PROJECT_ACTIVITY / RELEASE} 네 값만
+   * 계약 {@code LatestEntry.entryType} 은 {@code CASE / REFERENCE / QUESTION / PROJECT_ACTIVITY /
-   * 허용한다. projection 에는 {@code QUESTION}·{@code PROJECT}·{@code PROJECT_DECISION}·{@code PROFILE} 도
+   * RELEASE} 다섯 값을 허용한다. projection 에는 {@code PROJECT}·{@code PROJECT_DECISION}·{@code PROFILE} 도
    * 들어 있으므로 여기서 걸러야 한다 — 거르지 않으면 응답 매퍼가 계약 밖 값을 만나 500 이 되고, 그 500 은 홈 화면 전체를 못 쓰게 만든다.
    *
    * <p>{@code RELEASE} 가 결과에 없는 것은 누락이 아니다. 릴리스는 Publication 파이프라인을 거치지 않고 자체 {@code

src/adapter/outbound/persistence-jpa/src/main/java/dev/caskeleton/adapter/outbound/persistence/techlog/publicsite/PublicJson.java

@@ -2,6 +2,7 @@ package dev.caskeleton.adapter.outbound.persistence.techlog.publicsite;
 
 import dev.caskeleton.application.techlog.publicsite.model.ContactLinkView;
 import dev.caskeleton.application.techlog.publicsite.model.ProfileView;
+import dev.caskeleton.application.techlog.publicsite.model.ReferenceRuleView;
 import dev.caskeleton.shared.error.MappingException;
 import java.util.ArrayList;
 import java.util.List;
@@ -32,6 +33,16 @@ final class PublicJson {
     return out;
   }
 
+  /** Reference 의 판단 기준. 설계의 컬럼은 {@code {title, body, order}} 배열이다. */
+  List<ReferenceRuleView> referenceRules(String json) {
+    List<ReferenceRuleView> out = new ArrayList<>();
+    for (JsonNode node : array(json)) {
+      out.add(
+          new ReferenceRuleView(node.path("title").asString(""), node.path("body").asString("")));
+    }
+    return out;
+  }
+
   List<ContactLinkView> contacts(String json) {
     List<ContactLinkView> out = new ArrayList<>();
     for (JsonNode node : array(json)) {

src/adapter/outbound/persistence-jpa/src/main/java/dev/caskeleton/adapter/outbound/persistence/techlog/publicsite/PublicSql.java

@@ -16,7 +16,7 @@ final class PublicSql {
    * 조건도 한 곳에서 정의한다.
    */
   static final String LATEST_ENTRY_TYPES =
-      " p.resource_type IN ('CASE', 'REFERENCE', 'PROJECT_ACTIVITY') ";
+      " p.resource_type IN ('CASE', 'REFERENCE', 'QUESTION', 'PROJECT_ACTIVITY') ";
 
   private PublicSql() {}
 

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

@@ -13,11 +13,21 @@ import org.springframework.stereotype.Repository;
 /**
  * catalog는 도메인 repository를 거치지 않고 전용 union query를 쓴다 (설계 08장 §4).
  *
- * <p>RELATION / EVIDENCE는 슬라이스 2·5에서 채운다. 그때까지 빈 페이지를 반환하며 이는 계약상 유효한 응답이다.
+ * <p>RELATION 과 EVIDENCE 는 같은 기록을 서로 다른 시점에서 본다. RELATION 은 <em>작성 중</em>에 고르는 것이라 아직 게시되지 않은 작업본까지
+ * 포함한다 — 두 문서를 같이 쓰면서 서로 잇는 것이 정상적인 순서이고, 게시된 것만 보이면 그 순서를 쓸 수 없다. EVIDENCE 는 공개된 기록을 근거로 인용하는 것이므로
+ * 공개 투영에 살아 있는 행만 포함한다. 읽는 사람이 따라갈 수 없는 근거는 근거가 아니다.
  */
 @Repository
 public class JdbcCatalogQueryAdapter implements CatalogQueryPort {
 
+  /** 공개 노출 조건. {@code PublicSql.ACTIVE} 와 같은 정의다 — 그쪽은 package-private 이라 여기에 다시 적는다. */
+  private static final String PUBLICLY_VISIBLE =
+      " p.publication_state = 'ACTIVE' AND p.visibility = 'PUBLIC' ";
+
+  /** 연결·근거 대상이 될 수 있는 기록 유형. PROJECT 는 관계가 아니라 소속이라 여기에 없다. */
+  private static final String LINKABLE_TYPES =
+      " ('CASE', 'REFERENCE', 'QUESTION', 'PROJECT_DECISION') ";
+
   private final JdbcClient jdbcClient;
 
   public JdbcCatalogQueryAdapter(JdbcClient jdbcClient) {
@@ -32,7 +42,8 @@ public class JdbcCatalogQueryAdapter implements CatalogQueryPort {
         switch (type) {
           case TOPIC -> searchTopics(pattern, limit);
           case PROJECT -> searchProjects(pattern, limit);
-          case RELATION, EVIDENCE -> List.of();
+          case RELATION -> searchRelations(pattern, limit);
+          case EVIDENCE -> searchEvidence(pattern, limit);
         };
     return new CatalogPageView(items, null);
   }
@@ -57,11 +68,25 @@ public class JdbcCatalogQueryAdapter implements CatalogQueryPort {
         .list();
   }
 
+  /**
+   * 프로젝트의 공개 경로를 함께 싣는다.
+   *
+   * <p>여기서 {@code publicPath} 를 늘 null 로 두었더니 Decision 의 즉시 미리보기가 어떤 문서에서도 열리지 않았다. Decision 의 공개
+   * 주소는 자기 slug 가 아니라 {@code <프로젝트 경로>/decisions#<slug>} 라, 렌더 모델이 프로젝트 경로를 요구한다 — 그것이 비어 있으면
+   * "PROJECT public path is required" 로 미리보기 전체가 멈춘다. 화면에는 무엇이 모자란지 나오지 않는다.
+   *
+   * <p>게시되지 않은 프로젝트는 여전히 null 이다. 그때는 공개 주소가 실제로 없고, 없는 주소를 지어내면 미리보기가 보여 주는 링크가 게시 뒤에 달라진다.
+   */
   private List<CatalogEntryView> searchProjects(String pattern, int limit) {
     return jdbcClient
         .sql(
-            "SELECT id, name, updated_at FROM project "
+            "SELECT pr.id, pr.name, pr.updated_at, p.navigation_path"
-                + "WHERE lower(name) LIKE :pattern ORDER BY name LIMIT :limit")
+                + "  FROM project pr"
+                + "  LEFT JOIN public_resource_projection p"
+                + "    ON p.resource_type = 'PROJECT' AND p.resource_id = pr.id"
+                + "   AND "
+                + PUBLICLY_VISIBLE
+                + " WHERE lower(pr.name) LIKE :pattern ORDER BY pr.name LIMIT :limit")
         .param("pattern", pattern)
         .param("limit", limit)
         .query(
@@ -71,8 +96,83 @@ public class JdbcCatalogQueryAdapter implements CatalogQueryPort {
                     CatalogEntryType.PROJECT,
                     rs.getString("name"),
                     "PROJECT",
-                    null,
+                    rs.getString("navigation_path"),
                     "project:" + rs.getTimestamp("updated_at").toInstant()))
         .list();
   }
+
+  /**
+   * 세 원천 테이블을 하나의 목록으로 합친다. {@code document} 는 {@code document_type} 이 그대로 계약의 {@code kind} 이고, 나머지
+   * 둘은 테이블 자체가 유형을 정한다.
+   *
+   * <p>공개 경로는 게시된 것에만 있으므로 LEFT JOIN 이다. 작업본은 {@code publicPath} 가 null 이고, 이는 "아직 공개 주소가 없다"는 뜻이지
+   * "고를 수 없다"는 뜻이 아니다.
+   */
+  private List<CatalogEntryView> searchRelations(String pattern, int limit) {
+    return jdbcClient
+        .sql(
+            "SELECT id, kind, label, public_path, updated_at FROM ("
+                + "  SELECT d.id AS id, d.document_type AS kind, d.title AS label,"
+                + "         p.navigation_path AS public_path, d.updated_at AS updated_at"
+                + "    FROM document d"
+                + "    LEFT JOIN public_resource_projection p"
+                + "      ON p.resource_type = d.document_type AND p.resource_id = d.id"
+                + "     AND "
+                + PUBLICLY_VISIBLE
+                + "   WHERE lower(d.title) LIKE :pattern"
+                + "  UNION ALL"
+                + "  SELECT q.id, 'QUESTION', q.question,"
+                + "         p.navigation_path, q.updated_at"
+                + "    FROM open_question q"
+                + "    LEFT JOIN public_resource_projection p"
+                + "      ON p.resource_type = 'QUESTION' AND p.resource_id = q.id"
+                + "     AND "
+                + PUBLICLY_VISIBLE
+                + "   WHERE lower(q.question) LIKE :pattern"
+                + "  UNION ALL"
+                + "  SELECT pd.id, 'PROJECT_DECISION', pd.title,"
+                + "         p.navigation_path, pd.updated_at"
+                + "    FROM project_decision pd"
+                + "    LEFT JOIN public_resource_projection p"
+                + "      ON p.resource_type = 'PROJECT_DECISION' AND p.resource_id = pd.id"
+                + "     AND "
+                + PUBLICLY_VISIBLE
+                + "   WHERE lower(pd.title) LIKE :pattern"
+                + ") linkable ORDER BY label LIMIT :limit")
+        .param("pattern", pattern)
+        .param("limit", limit)
+        .query((rs, rowNum) -> entry(rs, CatalogEntryType.RELATION, "relation"))
+        .list();
+  }
+
+  /** 공개 투영이 곧 "읽는 사람이 따라갈 수 있는 기록"의 정의다. 여기서는 그 테이블 하나면 충분하다. */
+  private List<CatalogEntryView> searchEvidence(String pattern, int limit) {
+    return jdbcClient
+        .sql(
+            "SELECT p.resource_id AS id, p.resource_type AS kind, p.title AS label,"
+                + "       p.navigation_path AS public_path, p.updated_at AS updated_at"
+                + "  FROM public_resource_projection p"
+                + " WHERE "
+                + PUBLICLY_VISIBLE
+                + "   AND p.resource_type IN "
+                + LINKABLE_TYPES
+                + "   AND lower(p.title) LIKE :pattern"
+                + " ORDER BY label LIMIT :limit")
+        .param("pattern", pattern)
+        .param("limit", limit)
+        .query((rs, rowNum) -> entry(rs, CatalogEntryType.EVIDENCE, "evidence"))
+        .list();
+  }
+
+  private static CatalogEntryView entry(
+      java.sql.ResultSet rs, CatalogEntryType type, String revisionPrefix)
+      throws java.sql.SQLException {
+    return new CatalogEntryView(
+        UUID.fromString(rs.getString("id")),
+        type,
+        rs.getString("label"),
+        rs.getString("kind"),
+        rs.getString("public_path"),
+        revisionPrefix + ":" + rs.getTimestamp("updated_at").toInstant());
+  }
 }

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

@@ -164,9 +164,56 @@ public class JdbcPublicationWriterAdapter implements PublicationWriterPort {
     // 18. Document publish metadata
     markSourcePublished(request);
 
+    // 19. 프로젝트 활동 로그
+    recordProjectActivity(request);
+
     return result(publicationId, eventId);
   }
 
+  /**
+   * 프로젝트 활동은 손으로 적는 것이 아니라 게시가 남기는 로그다.
+   *
+   * <p>한동안 이 줄을 Studio 에서 직접 써야 했다. 그러면 "언제 무엇을 올렸는가" 가 실제로 올린 사실과 따로 관리되고, 적기를 잊으면 타임라인에 구멍이 남는다.
+   * 게시가 곧 사건이므로 게시가 기록한다.
+   *
+   * <p>{@code operation_key} 로 문서마다 한 줄만 남긴다. 재게시는 새로 올린 것이 아니라 같은 글을 고친 것이므로 타임라인에 다시 나타나지 않아야 한다
+   * — {@code uq_project_activity_operation_key} 가 그것을 보장하고, 여기서는 충돌을 무시한다.
+   *
+   * <p>프로젝트에 매달리지 않은 기록은 남길 자리가 없다. 그때는 아무것도 하지 않는다.
+   */
+  private void recordProjectActivity(PublishRequest request) {
+    if (request.projectId() == null) {
+      return;
+    }
+    jdbcClient
+        .sql(
+            "INSERT INTO project_activity (id, project_id, activity_type, title, summary,"
+                + " visibility, origin, related_resource_type, related_resource_id, occurred_at,"
+                + " operation_key, created_by, updated_by)"
+                + " VALUES (:id, :projectId, :type, :title, '', 'PUBLIC', 'AUTO',"
+                + " :resourceType, :resourceId, now(), :operationKey, :actor, :actor)"
+                + " ON CONFLICT (project_id, operation_key) DO NOTHING")
+        .param("id", idGenerator.get())
+        .param("projectId", request.projectId())
+        .param("type", activityTypeOf(request.kind()))
+        .param("title", request.title())
+        .param("resourceType", request.kind().name())
+        .param("resourceId", request.documentId())
+        .param("operationKey", "publication:" + request.documentId())
+        .param("actor", request.principal())
+        .update();
+  }
+
+  /** {@code project_activity_activity_type_check} 가 허용하는 값으로 옮긴다. */
+  private static String activityTypeOf(RecordKind kind) {
+    return switch (kind) {
+      case CASE -> "CASE_PUBLISHED";
+      case REFERENCE -> "REFERENCE_PUBLISHED";
+      case QUESTION -> "QUESTION_OPENED";
+      case PROJECT_DECISION -> "DECISION_ACCEPTED";
+    };
+  }
+
   @Override
   public PublishResultView unpublish(UnpublishRequest request) {
     requireTransaction("unpublish");

src/adapter/outbound/persistence-jpa/src/main/resources/db/migration/postgresql/V10__techlog_project_activity_publication_log.sql

@@ -0,0 +1,53 @@
+-- 프로젝트 활동을 게시 로그로 되돌린다.
+--
+-- 이 표는 원래 손으로 적는 자리였다. 그러면 "언제 무엇을 올렸는가" 가 실제로 올린 사실과 따로
+-- 관리되고, 적기를 잊으면 타임라인에 구멍이 남는다. 이제 게시가 이 줄을 남긴다
+-- (JdbcPublicationWriterAdapter 19단계).
+--
+-- 이 마이그레이션은 그 규칙을 이미 게시된 것들에 소급 적용한다. 게시는 있었는데 로그가 없는
+-- 상태를 남겨 두면, 이 변경 이전에 올린 글은 타임라인에서 영영 빠진다.
+--
+-- occurred_at 은 최초 PUBLISHED 사건의 시각이다 -- now() 를 쓰면 옛 게시가 전부 오늘 올린 것처럼
+-- 보인다. operation_key 는 애플리케이션이 쓰는 것과 같은 규칙이라, 나중에 같은 문서를 재게시해도
+-- 줄이 늘지 않는다.
+INSERT INTO project_activity (
+    id, project_id, activity_type, title, summary, visibility, origin,
+    related_resource_type, related_resource_id, occurred_at,
+    operation_key, created_by, updated_by
+)
+SELECT
+    gen_random_uuid(),
+    link.project_id,
+    CASE publication.source_kind
+        WHEN 'CASE' THEN 'CASE_PUBLISHED'
+        WHEN 'REFERENCE' THEN 'REFERENCE_PUBLISHED'
+        WHEN 'QUESTION' THEN 'QUESTION_OPENED'
+        ELSE 'DECISION_ACCEPTED'
+    END,
+    projection.title,
+    '',
+    'PUBLIC',
+    'AUTO',
+    publication.source_kind,
+    publication.source_id,
+    first_published.occurred_at,
+    'publication:' || publication.source_id,
+    'system:migration',
+    'system:migration'
+FROM publication
+JOIN public_resource_project_link link
+    ON link.resource_type = publication.source_kind
+   AND link.resource_id = publication.source_id
+   AND link.relation_type = 'PRIMARY'
+JOIN public_resource_projection projection
+    ON projection.resource_type = publication.source_kind
+   AND projection.resource_id = publication.source_id
+JOIN LATERAL (
+    SELECT min(event.occurred_at) AS occurred_at
+      FROM publication_event event
+     WHERE event.publication_id = publication.publication_id
+       AND event.event_type = 'PUBLISHED'
+) first_published ON true
+WHERE publication.status = 'PUBLISHED'
+  AND first_published.occurred_at IS NOT NULL
+ON CONFLICT (project_id, operation_key) DO NOTHING;

src/adapter/outbound/persistence-jpa/src/postgresqlIntegrationTest/java/dev/caskeleton/adapter/outbound/persistence/readiness/PostgreSqlMigrationIntegrationTest.java

@@ -43,8 +43,16 @@ class PostgreSqlMigrationIntegrationTest {
         .load()
         .migrate();
 
+    /*
+      TechLog 가 들어오면서 8·9·10 이 붙었는데 이 목록은 7 에서 멈춰 있었다. 마이그레이션을 더한
+      사람이 여기를 같이 고치지 않으면 이 테스트만 빨개지고, 그 빨간색은 "스키마가 잘못됐다" 가
+      아니라 "목록을 안 고쳤다" 를 뜻한다 — 정확히 그 상태로 두 번 지나갔다.
+
+      목록을 고정해 두는 이유는 남아 있다: 마이그레이션이 순서대로, 빠짐없이 적용되는지 확인한다.
+      그래서 개수를 세는 것이 아니라 버전을 그대로 적는다.
+    */
     assertThat(appliedVersions(postgres, "flyway_schema_history"))
-        .containsExactly("1", "3", "4", "5", "6", "7");
+        .containsExactly("1", "3", "4", "5", "6", "7", "8", "9", "10");
 
     Flyway coreStream =
         Flyway.configure()

src/adapter/outbound/persistence-jpa/src/postgresqlIntegrationTest/java/dev/caskeleton/adapter/outbound/persistence/techlog/management/ManagementPersistenceIntegrationTest.java

@@ -4,6 +4,18 @@ 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.query.JdbcCatalogQueryAdapter;
+import dev.caskeleton.application.techlog.management.command.CreateProjectActivityCommand;
+import dev.caskeleton.application.techlog.management.command.CreateProjectCommand;
+import dev.caskeleton.application.techlog.management.command.UpdateHomeFocusCommand;
+import dev.caskeleton.application.techlog.management.command.UpdateProjectActivityCommand;
+import dev.caskeleton.application.techlog.management.command.UpdateProjectCommand;
+import dev.caskeleton.application.techlog.management.model.HomeFocusConfigView;
+import dev.caskeleton.application.techlog.management.model.ProjectActivityView;
+import dev.caskeleton.application.techlog.management.model.ProjectEditView;
+import dev.caskeleton.application.techlog.studio.query.CatalogEntryType;
+import dev.caskeleton.application.techlog.studio.query.CatalogPageView;
+import java.time.Instant;
 import java.util.UUID;
 import org.flywaydb.core.Flyway;
 import org.junit.jupiter.api.AfterAll;
@@ -12,6 +24,7 @@ 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;
 
 /**
  * 작업본 삭제 SQL 을 실제 PostgreSQL 위에서 돌린다.
@@ -32,6 +45,10 @@ class ManagementPersistenceIntegrationTest {
   private static HikariDataSource dataSource;
   private static JdbcClient jdbcClient;
   private static JdbcDocumentDeletionAdapter deletion;
+  private static JdbcProjectRepositoryAdapter projects;
+  private static JdbcHomeFocusConfigAdapter homeFocus;
+  private static JdbcCatalogQueryAdapter catalog;
+  private static JdbcProjectActivityRepositoryAdapter activities;
 
   @BeforeAll
   static void migrate() {
@@ -61,6 +78,10 @@ class ManagementPersistenceIntegrationTest {
 
     jdbcClient = JdbcClient.create(dataSource);
     deletion = new JdbcDocumentDeletionAdapter(jdbcClient);
+    projects = new JdbcProjectRepositoryAdapter(jdbcClient, new ObjectMapper());
+    homeFocus = new JdbcHomeFocusConfigAdapter(jdbcClient);
+    catalog = new JdbcCatalogQueryAdapter(jdbcClient);
+    activities = new JdbcProjectActivityRepositoryAdapter(jdbcClient);
   }
 
   @AfterAll
@@ -396,4 +417,402 @@ class ManagementPersistenceIntegrationTest {
     assertThat(deletion.deleteDecision(id, 0L)).isEqualTo(1);
     assertThat(deletion.findDecision(projectId, id)).isEmpty();
   }
+
+  // ---------------------------------------------------------------- 프로젝트 게시
+
+  /**
+   * 프로젝트 게시는 원본 상태·공개 투영·canonical route 세 곳을 함께 세운다. 어느 하나가 빠지면 증상이 제각각이라 (투영이 없으면 화면이 조용히 비고,
+   * route 가 없으면 주소만 404) 세 곳을 한꺼번에 확인한다.
+   */
+  @Test
+  void publishingAProjectRaisesTheProjection() {
+    ProjectEditView draft = projects.create(new CreateProjectCommand("Publish Me", "test"));
+    jdbcClient
+        .sql("UPDATE project SET slug = 'publish-me' WHERE id = :id")
+        .param("id", draft.id())
+        .update();
+    ProjectEditView loaded = projects.find(draft.id()).orElseThrow();
+
+    ProjectEditView published =
+        projects.publish(loaded.id(), loaded.version(), "PUBLIC", "test").orElseThrow();
+
+    assertThat(published.targetVisibility()).isEqualTo("PUBLIC");
+    assertThat(published.firstPublishedAt()).isNotNull();
+    assertThat(
+            jdbcClient
+                .sql(
+                    "SELECT navigation_path FROM public_resource_projection"
+                        + " WHERE resource_type = 'PROJECT' AND resource_id = :id"
+                        + "   AND publication_state = 'ACTIVE' AND visibility = 'PUBLIC'")
+                .param("id", loaded.id())
+                .query(String.class)
+                .optional())
+        .contains("/projects/publish-me");
+    assertThat(
+            jdbcClient
+                .sql(
+                    "SELECT route_role FROM public_route"
+                        + " WHERE resource_type = 'PROJECT' AND resource_id = :id")
+                .param("id", loaded.id())
+                .query(String.class)
+                .list())
+        .containsExactly("CANONICAL");
+  }
+
+  /** 게시 취소는 투영 행을 지우지 않고 내린다 — 지우면 다시 게시할 때 이력이 끊긴다. */
+  @Test
+  void unpublishingWithdrawsTheProjectionInsteadOfDeletingIt() {
+    ProjectEditView draft = projects.create(new CreateProjectCommand("Withdraw Me", "test"));
+    jdbcClient
+        .sql("UPDATE project SET slug = 'withdraw-me' WHERE id = :id")
+        .param("id", draft.id())
+        .update();
+    ProjectEditView loaded = projects.find(draft.id()).orElseThrow();
+    ProjectEditView published =
+        projects.publish(loaded.id(), loaded.version(), "PUBLIC", "test").orElseThrow();
+
+    assertThat(projects.unpublish(published.id(), published.version(), "test")).isPresent();
+
+    assertThat(
+            jdbcClient
+                .sql(
+                    "SELECT publication_state FROM public_resource_projection"
+                        + " WHERE resource_type = 'PROJECT' AND resource_id = :id")
+                .param("id", published.id())
+                .query(String.class)
+                .optional())
+        .contains("WITHDRAWN");
+  }
+
+  /** 낙관적 잠금. 어긋난 버전으로는 아무것도 세우지 않는다. */
+  @Test
+  void publishingWithAStaleVersionChangesNothing() {
+    ProjectEditView draft = projects.create(new CreateProjectCommand("Stale", "test"));
+    jdbcClient
+        .sql("UPDATE project SET slug = 'stale' WHERE id = :id")
+        .param("id", draft.id())
+        .update();
+    ProjectEditView loaded = projects.find(draft.id()).orElseThrow();
+
+    assertThat(projects.publish(loaded.id(), loaded.version() + 99, "PUBLIC", "test")).isEmpty();
+    assertThat(
+            jdbcClient
+                .sql(
+                    "SELECT count(*) FROM public_resource_projection"
+                        + " WHERE resource_type = 'PROJECT' AND resource_id = :id")
+                .param("id", loaded.id())
+                .query(Integer.class)
+                .single())
+        .isZero();
+  }
+
+  // ---------------------------------------------------------------- 홈 focus
+
+  /** V9 가 빈 행 하나를 넣어 둔다. 조회가 실패하면 그 전제가 깨진 것이다. */
+  @Test
+  void homeFocusStartsAsASingleEmptyRow() {
+    HomeFocusConfigView current = homeFocus.load();
+    assertThat(current.currentProjectId()).isNull();
+    assertThat(current.openQuestionId()).isNull();
+    assertThat(current.recentDecisionId()).isNull();
+  }
+
+  @Test
+  void homeFocusRoundTripsAndRefusesAStaleVersion() {
+    ProjectEditView project = projects.create(new CreateProjectCommand("Focus Target", "test"));
+    HomeFocusConfigView before = homeFocus.load();
+
+    HomeFocusConfigView saved =
+        homeFocus
+            .update(
+                new UpdateHomeFocusCommand(
+                    before.version(), "CURRENT_WORK", project.id(), null, null, "test"))
+            .orElseThrow();
+
+    assertThat(saved.currentProjectId()).isEqualTo(project.id());
+    assertThat(saved.defaultType()).isEqualTo("CURRENT_WORK");
+    assertThat(saved.version()).isEqualTo(before.version() + 1);
+    assertThat(homeFocus.projectExists(project.id())).isTrue();
+    assertThat(homeFocus.projectExists(UUID.randomUUID())).isFalse();
+
+    assertThat(
+            homeFocus.update(
+                new UpdateHomeFocusCommand(before.version(), null, null, null, null, "test")))
+        .isEmpty();
+
+    // null 은 "이 슬롯을 비운다" 다 — 부분 수정이 아니라 전체 교체.
+    HomeFocusConfigView cleared =
+        homeFocus
+            .update(new UpdateHomeFocusCommand(saved.version(), null, null, null, null, "test"))
+            .orElseThrow();
+    assertThat(cleared.currentProjectId()).isNull();
+  }
+
+  // ---------------------------------------------------------------- catalog
+
+  /** RELATION 은 작성 중에 고르는 것이므로 게시 여부와 무관하게 작업본까지 포함한다. */
+  @Test
+  void relationCatalogIncludesUnpublishedWorkingCopies() {
+    UUID caseId = insertCase("Relation Target Case");
+    UUID questionId = insertQuestion("Relation Target Question");
+
+    CatalogPageView page = catalog.search(CatalogEntryType.RELATION, null, null, 50);
+
+    assertThat(page.items()).extracting("id").contains(caseId, questionId);
+    assertThat(page.items())
+        .filteredOn(entry -> entry.id().equals(caseId))
+        .singleElement()
+        .satisfies(
+            entry -> {
+              assertThat(entry.kind()).isEqualTo("CASE");
+              assertThat(entry.publicPath()).isNull();
+            });
+  }
+
+  /** EVIDENCE 는 읽는 사람이 따라갈 수 있어야 하므로 공개된 것만 포함한다. */
+  @Test
+  void evidenceCatalogIncludesOnlyPubliclyVisibleRecords() {
+    UUID publishedId = insertCase("Evidence Published");
+    UUID draftId = insertCase("Evidence Draft");
+    UUID withdrawnId = insertCase("Evidence Withdrawn");
+    insertProjection("CASE", publishedId, "ACTIVE", "Evidence Published");
+    insertProjection("CASE", withdrawnId, "WITHDRAWN", "Evidence Withdrawn");
+
+    CatalogPageView page = catalog.search(CatalogEntryType.EVIDENCE, "evidence", null, 50);
+
+    assertThat(page.items()).extracting("id").contains(publishedId);
+    assertThat(page.items()).extracting("id").doesNotContain(draftId, withdrawnId);
+  }
+
+  /** 검색어는 대소문자를 가리지 않는다. */
+  @Test
+  void relationCatalogSearchIsCaseInsensitive() {
+    UUID caseId = insertCase("MixedCase Needle");
+
+    assertThat(catalog.search(CatalogEntryType.RELATION, "mixedcase", null, 50).items())
+        .extracting("id")
+        .contains(caseId);
+  }
+
+  // ---------------------------------------------------------------- 프로젝트 활동
+
+  private static ProjectActivityView addActivity(UUID projectId, String title, String visibility) {
+    return activities.create(
+        new CreateProjectActivityCommand(
+            projectId,
+            0L,
+            "MILESTONE_REACHED",
+            title,
+            "요약",
+            visibility,
+            null,
+            null,
+            Instant.parse("2026-08-23T00:00:00Z"),
+            "test"));
+  }
+
+  /**
+   * 공개 프로젝트 화면의 "활동" 은 이 테이블을 투영 없이 직접 읽는다. 그래서 여기서 만든 줄이 곧 그 화면이고, 편집기가 읽는 목록과 화면이 읽는 목록이 같은 정렬·같은
+   * 조건을 써야 한다.
+   */
+  @Test
+  void createdActivitiesAreVisibleToTheEditorAndToThePublicQuery() {
+    ProjectEditView project = projects.create(new CreateProjectCommand("Activity Host", "test"));
+    ProjectActivityView pub = addActivity(project.id(), "공개 활동", "PUBLIC");
+    addActivity(project.id(), "비공개 활동", "PRIVATE");
+
+    assertThat(pub.origin()).isEqualTo("MANUAL");
+    assertThat(activities.listByProject(project.id())).hasSize(2);
+
+    // 공개 조회가 쓰는 조건 그대로.
+    assertThat(
+            jdbcClient
+                .sql(
+                    "SELECT title FROM project_activity"
+                        + " WHERE project_id = :id AND visibility = 'PUBLIC'"
+                        + " ORDER BY occurred_at DESC, id DESC")
+                .param("id", project.id())
+                .query(String.class)
+                .list())
+        .containsExactly("공개 활동");
+  }
+
+  @Test
+  void activityUpdatesRoundTripAndRefuseAStaleVersion() {
+    ProjectEditView project = projects.create(new CreateProjectCommand("Activity Edit", "test"));
+    ProjectActivityView created = addActivity(project.id(), "처음 제목", "PRIVATE");
+
+    ProjectActivityView updated =
+        activities
+            .update(
+                new UpdateProjectActivityCommand(
+                    project.id(),
+                    created.id(),
+                    created.version(),
+                    "고친 제목",
+                    "고친 요약",
+                    "PUBLIC",
+                    Instant.parse("2026-08-24T00:00:00Z"),
+                    "test"))
+            .orElseThrow();
+
+    assertThat(updated.title()).isEqualTo("고친 제목");
+    assertThat(updated.visibility()).isEqualTo("PUBLIC");
+    assertThat(updated.version()).isEqualTo(created.version() + 1);
+
+    assertThat(
+            activities.update(
+                new UpdateProjectActivityCommand(
+                    project.id(),
+                    created.id(),
+                    created.version(),
+                    "다시",
+                    null,
+                    "PUBLIC",
+                    Instant.parse("2026-08-24T00:00:00Z"),
+                    "test")))
+        .isEmpty();
+  }
+
+  /** 경로가 프로젝트와 활동을 함께 요구하므로 저장소도 둘을 함께 본다 — 남의 프로젝트 줄을 고치거나 지울 수 없어야 한다. */
+  @Test
+  void activityWritesAreScopedToTheirOwnProject() {
+    ProjectEditView mine = projects.create(new CreateProjectCommand("Mine", "test"));
+    ProjectEditView theirs = projects.create(new CreateProjectCommand("Theirs", "test"));
+    ProjectActivityView activity = addActivity(theirs.id(), "남의 활동", "PUBLIC");
+
+    assertThat(activities.find(mine.id(), activity.id())).isEmpty();
+    assertThat(activities.delete(mine.id(), activity.id(), activity.version())).isZero();
+    assertThat(activities.find(theirs.id(), activity.id())).isPresent();
+  }
+
+  @Test
+  void deletingAnActivityHonoursTheExpectedVersion() {
+    ProjectEditView project = projects.create(new CreateProjectCommand("Activity Delete", "test"));
+    ProjectActivityView activity = addActivity(project.id(), "지울 활동", "PUBLIC");
+
+    assertThat(activities.delete(project.id(), activity.id(), activity.version() + 9)).isZero();
+    assertThat(activities.delete(project.id(), activity.id(), activity.version())).isEqualTo(1);
+    assertThat(activities.listByProject(project.id())).isEmpty();
+  }
+
+  // ---------------------------------------------------------------- 프로젝트 주제
+
+  private static UUID insertTopic(String name, String slug) {
+    UUID id = UUID.randomUUID();
+    jdbcClient
+        .sql(
+            "INSERT INTO topic (id, name, normalized_name, slug, created_by, updated_by)"
+                + " VALUES (:id, :name, :normalized, :slug, 'test', 'test')")
+        .param("id", id)
+        .param("name", name)
+        .param("normalized", name.toLowerCase(java.util.Locale.ROOT))
+        .param("slug", slug)
+        .update();
+    return id;
+  }
+
+  private static UpdateProjectCommand updateWithTopics(
+      ProjectEditView project, java.util.List<UUID> topicIds) {
+    return new UpdateProjectCommand(
+        project.id(),
+        project.version(),
+        project.name(),
+        project.slug() == null ? "project-" + project.id() : project.slug(),
+        "목적 한 줄",
+        "",
+        "",
+        "",
+        project.phase(),
+        "지금 목표",
+        "다음 작업",
+        java.util.List.of("Keycloak"),
+        topicIds,
+        "PRIVATE",
+        null,
+        "test");
+  }
+
+  /**
+   * 프로젝트 화면의 "주요 주제" 는 이 링크 테이블을 읽는다. 화면은 처음부터 주제를 읽고 있었지만 저장할 경로가 없어 늘 비어 있었다 — 여기서 확인하는 것은 고른 순서가
+   * 그대로 남는가와, 통째로 교체되는가다.
+   */
+  @Test
+  void projectTopicsRoundTripInTheChosenOrder() {
+    ProjectEditView project = projects.create(new CreateProjectCommand("Topic Host", "test"));
+    UUID first = insertTopic("주제 하나", "topic-one");
+    UUID second = insertTopic("주제 둘", "topic-two");
+
+    ProjectEditView saved =
+        projects.update(updateWithTopics(project, java.util.List.of(second, first))).orElseThrow();
+
+    assertThat(saved.topicIds()).containsExactly(second, first);
+    assertThat(saved.currentObjective()).isEqualTo("지금 목표");
+    assertThat(saved.nextStep()).isEqualTo("다음 작업");
+
+    // 공개 조회가 쓰는 조건 그대로 — ACTIVE 인 주제만, display_order 순서로.
+    assertThat(
+            jdbcClient
+                .sql(
+                    "SELECT t.name FROM project_topic pt"
+                        + " JOIN topic t ON t.id = pt.topic_id"
+                        + " WHERE pt.project_id = :id AND t.status = 'ACTIVE'"
+                        + " ORDER BY pt.display_order, t.name")
+                .param("id", project.id())
+                .query(String.class)
+                .list())
+        .containsExactly("주제 둘", "주제 하나");
+  }
+
+  /** 부분 수정이 아니라 전체 교체다 — 빈 목록은 "주제를 전부 뗀다" 는 뜻이어야 한다. */
+  @Test
+  void savingAnEmptyTopicListDetachesEveryTopic() {
+    ProjectEditView project = projects.create(new CreateProjectCommand("Detach Host", "test"));
+    UUID topic = insertTopic("뗄 주제", "topic-detach");
+    ProjectEditView withTopic =
+        projects.update(updateWithTopics(project, java.util.List.of(topic))).orElseThrow();
+    assertThat(withTopic.topicIds()).containsExactly(topic);
+
+    ProjectEditView cleared =
+        projects.update(updateWithTopics(withTopic, java.util.List.of())).orElseThrow();
+
+    assertThat(cleared.topicIds()).isEmpty();
+    assertThat(
+            jdbcClient
+                .sql("SELECT count(*) FROM project_topic WHERE project_id = :id")
+                .param("id", project.id())
+                .query(Integer.class)
+                .single())
+        .isZero();
+  }
+
+  /**
+   * Decision 의 공개 주소는 자기 slug 가 아니라 프로젝트 주소 아래에 있다. 그래서 편집기가 Decision 을 미리 그리려면 이 목록이 프로젝트의 공개 경로를
+   * 알고 있어야 한다 — 한동안 늘 null 이었고, 그동안 Decision 은 어떤 문서에서도 즉시 미리보기가 열리지 않았다.
+   */
+  @Test
+  void projectCatalogCarriesThePublicPathOfPublishedProjectsOnly() {
+    ProjectEditView open = projects.create(new CreateProjectCommand("Catalog Published", "test"));
+    jdbcClient
+        .sql("UPDATE project SET slug = 'catalog-published' WHERE id = :id")
+        .param("id", open.id())
+        .update();
+    ProjectEditView loaded = projects.find(open.id()).orElseThrow();
+    assertThat(projects.publish(loaded.id(), loaded.version(), "PUBLIC", "test")).isPresent();
+
+    ProjectEditView hidden = projects.create(new CreateProjectCommand("Catalog Hidden", "test"));
+
+    var entries = catalog.search(CatalogEntryType.PROJECT, "catalog", null, 50).items();
+
+    assertThat(entries)
+        .filteredOn(entry -> entry.id().equals(open.id()))
+        .singleElement()
+        .satisfies(
+            entry -> assertThat(entry.publicPath()).isEqualTo("/projects/catalog-published"));
+    // 게시되지 않은 프로젝트는 공개 주소가 실제로 없다. 지어내면 미리보기가 보여 준 링크가 게시 뒤에 달라진다.
+    assertThat(entries)
+        .filteredOn(entry -> entry.id().equals(hidden.id()))
+        .singleElement()
+        .satisfies(entry -> assertThat(entry.publicPath()).isNull());
+  }
 }

src/adapter/outbound/persistence-jpa/src/postgresqlIntegrationTest/java/dev/caskeleton/adapter/outbound/persistence/techlog/publicsite/PublicSitePersistenceIntegrationTest.java

@@ -206,12 +206,21 @@ class PublicSitePersistenceIntegrationTest {
         .noneMatch(entry -> entry.title().contains("숨김"));
     assertThat(view.latestEntries())
         .as(
-            "계약 LatestEntry.entryType 은 네 값만 허용한다 — projection 의 QUESTION/PROJECT 등이 섞이면"
+            "계약 LatestEntry.entryType 이 허용하는 값만 나와야 한다 — projection 의 PROJECT/PROJECT_DECISION"
-                + " 응답 매퍼가 계약 밖 값을 만나 500 이 된다")
+                + " 등이 섞이면 응답 매퍼가 계약 밖 값을 만나 500 이 되고, 그 500 은 홈 화면 전체를 못 쓰게 만든다")
         .extracting("entryType")
         .containsAnyOf("CASE", "REFERENCE", "PROJECT_ACTIVITY")
         .allSatisfy(
-            type -> assertThat(type).isIn("CASE", "REFERENCE", "PROJECT_ACTIVITY", "RELEASE"));
+            type ->
+                assertThat(type)
+                    .isIn("CASE", "REFERENCE", "QUESTION", "PROJECT_ACTIVITY", "RELEASE"));
+    assertThat(view.latestEntries())
+        .as("게시한 Open Question 도 최근 기록에 나와야 한다 — 목록에서 빠지면 게시한 사실이 어디에도 보이지 않는다")
+        .anySatisfy(
+            entry -> {
+              assertThat(entry.entryType()).isEqualTo("QUESTION");
+              assertThat(entry.path()).isEqualTo("/questions/reprocessing-latency");
+            });
   }
 
   /**
@@ -397,10 +406,16 @@ class PublicSitePersistenceIntegrationTest {
     assertThat(view.relatedProjects()).extracting("title").contains("Tech Log");
     assertThat(view.latestRecords()).isNotEmpty();
     assertThat(view.latestRecords())
-        .as("주제 상세의 최신 기록도 계약의 entryType 네 값을 벗어나면 안 된다")
+        .as("주제 상세의 최신 기록도 계약의 entryType 을 벗어나면 안 된다")
         .extracting("entryType")
         .allSatisfy(
-            type -> assertThat(type).isIn("CASE", "REFERENCE", "PROJECT_ACTIVITY", "RELEASE"));
+            type ->
+                assertThat(type)
+                    .isIn("CASE", "REFERENCE", "QUESTION", "PROJECT_ACTIVITY", "RELEASE"));
+    assertThat(view.latestRecords())
+        .as("주제와 홈은 같은 목록 의미를 쓴다 — 홈에 나오는 Open Question 이 여기서 빠지면 두 화면이 어긋난다")
+        .extracting("entryType")
+        .contains("QUESTION");
   }
 
   @Test

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

@@ -1,25 +1,35 @@
 package dev.caskeleton.bootstrap.techlog;
 
 import dev.caskeleton.application.techlog.management.port.out.DocumentDeletionPort;
+import dev.caskeleton.application.techlog.management.port.out.HomeFocusConfigPort;
+import dev.caskeleton.application.techlog.management.port.out.ProjectActivityRepositoryPort;
 import dev.caskeleton.application.techlog.management.port.out.ProjectRepositoryPort;
 import dev.caskeleton.application.techlog.management.port.out.ReleaseRepositoryPort;
 import dev.caskeleton.application.techlog.management.port.out.TopicRepositoryPort;
 import dev.caskeleton.application.techlog.management.service.ArchiveReleaseUseCase;
+import dev.caskeleton.application.techlog.management.service.CreateProjectActivityUseCase;
 import dev.caskeleton.application.techlog.management.service.CreateProjectUseCase;
 import dev.caskeleton.application.techlog.management.service.CreateReleaseUseCase;
 import dev.caskeleton.application.techlog.management.service.DeleteDocumentDraftUseCase;
+import dev.caskeleton.application.techlog.management.service.DeleteProjectActivityUseCase;
 import dev.caskeleton.application.techlog.management.service.DeleteProjectDecisionUseCase;
 import dev.caskeleton.application.techlog.management.service.DeleteProjectUseCase;
 import dev.caskeleton.application.techlog.management.service.DeleteQuestionUseCase;
 import dev.caskeleton.application.techlog.management.service.DeleteReleaseUseCase;
 import dev.caskeleton.application.techlog.management.service.DeleteTopicUseCase;
+import dev.caskeleton.application.techlog.management.service.GetHomeFocusUseCase;
 import dev.caskeleton.application.techlog.management.service.GetProjectForEditUseCase;
 import dev.caskeleton.application.techlog.management.service.GetReleaseForEditUseCase;
+import dev.caskeleton.application.techlog.management.service.ListStudioProjectActivitiesUseCase;
 import dev.caskeleton.application.techlog.management.service.ListStudioProjectsUseCase;
 import dev.caskeleton.application.techlog.management.service.ListStudioReleasesUseCase;
 import dev.caskeleton.application.techlog.management.service.ListStudioTopicsUseCase;
+import dev.caskeleton.application.techlog.management.service.PublishProjectUseCase;
 import dev.caskeleton.application.techlog.management.service.PublishReleaseUseCase;
 import dev.caskeleton.application.techlog.management.service.SaveTopicUseCase;
+import dev.caskeleton.application.techlog.management.service.UnpublishProjectUseCase;
+import dev.caskeleton.application.techlog.management.service.UpdateHomeFocusUseCase;
+import dev.caskeleton.application.techlog.management.service.UpdateProjectActivityUseCase;
 import dev.caskeleton.application.techlog.management.service.UpdateProjectUseCase;
 import dev.caskeleton.application.techlog.management.service.UpdateReleaseUseCase;
 import dev.caskeleton.application.transaction.TransactionPort;
@@ -128,4 +138,51 @@ public class TechLogManagementConfig {
       DocumentDeletionPort documents, TransactionPort tx) {
     return new DeleteProjectDecisionUseCase(documents, tx);
   }
+
+  @Bean
+  PublishProjectUseCase publishProjectUseCase(ProjectRepositoryPort projects, TransactionPort tx) {
+    return new PublishProjectUseCase(projects, tx);
+  }
+
+  @Bean
+  UnpublishProjectUseCase unpublishProjectUseCase(
+      ProjectRepositoryPort projects, TransactionPort tx) {
+    return new UnpublishProjectUseCase(projects, tx);
+  }
+
+  @Bean
+  GetHomeFocusUseCase getHomeFocusUseCase(HomeFocusConfigPort config, TransactionPort tx) {
+    return new GetHomeFocusUseCase(config, tx);
+  }
+
+  @Bean
+  UpdateHomeFocusUseCase updateHomeFocusUseCase(HomeFocusConfigPort config, TransactionPort tx) {
+    return new UpdateHomeFocusUseCase(config, tx);
+  }
+
+  @Bean
+  ListStudioProjectActivitiesUseCase listStudioProjectActivitiesUseCase(
+      ProjectActivityRepositoryPort activities, TransactionPort tx) {
+    return new ListStudioProjectActivitiesUseCase(activities, tx);
+  }
+
+  @Bean
+  CreateProjectActivityUseCase createProjectActivityUseCase(
+      ProjectActivityRepositoryPort activities,
+      ProjectRepositoryPort projects,
+      TransactionPort tx) {
+    return new CreateProjectActivityUseCase(activities, projects, tx);
+  }
+
+  @Bean
+  UpdateProjectActivityUseCase updateProjectActivityUseCase(
+      ProjectActivityRepositoryPort activities, TransactionPort tx) {
+    return new UpdateProjectActivityUseCase(activities, tx);
+  }
+
+  @Bean
+  DeleteProjectActivityUseCase deleteProjectActivityUseCase(
+      ProjectActivityRepositoryPort activities, TransactionPort tx) {
+    return new DeleteProjectActivityUseCase(activities, tx);
+  }
 }

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

@@ -173,6 +173,14 @@ spring:
       # true | false  (Java 21 virtual threads for Tomcat request handlers)
       enabled: ${SPRING_THREADS_VIRTUAL_ENABLED}
   servlet:
+    session:
+      # Studio 작성자는 한 기록을 여러 번 저장하며 오래 머문다. Spring 기본 30분 유휴 만료는 그
+      # 리듬보다 짧아 작성 도중 로그인 화면으로 돌아가는 일이 잦았다 — 저장하지 않은 편집이
+      # 있으면 그 시점에 잃는다.
+      #
+      # 값은 배포가 정한다. 늘릴수록 훔친 session cookie가 유효한 창도 같이 늘어나므로,
+      # Keycloak realm 의 SSO idle 과 따로 놀지 않게 함께 맞춘다.
+      timeout: ${APP_SESSION_TIMEOUT:8h}
     multipart:
       # feature-api-contract-baseline D8: bound request body size so an oversized
       # upload classifies as 413 PAYLOAD_TOO_LARGE inside the envelope (via

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

@@ -2158,4 +2158,67 @@ class CleanArchitectureTest {
         .filter(value -> value instanceof Number number && number.intValue() == SqlTypes.UUID)
         .isPresent();
   }
+
+  /**
+   * Spring 이 생성자를 고를 수 있어야 한다.
+   *
+   * <p>이 규칙은 사고 하나에서 나왔다. 한 어댑터가 생성자를 둘 갖고 있었고 — 하나는 운영용, 하나는 테스트가 id 생성기를 넣기 위한 것 — 둘 중 어느 것에도
+   * {@code @Autowired} 가 없었다. 컴포넌트 스캔은 고르지 못하고 기본 생성자를 찾다가 실패한다. 컴파일도, 단위 테스트도, 실제 PostgreSQL 위에서
+   * 도는 통합 테스트도 전부 통과했다. 그 어느 것도 컨텍스트를 띄우지 않기 때문이다. 운영에서 기동만 못 했다.
+   *
+   * <p>그래서 여기서 막는다: 스캔되는 스프링 컴포넌트는 생성자가 하나이거나, 여럿이면 그중 하나에 {@code @Autowired} 가 붙어 있어야 한다.
+   */
+  @ArchTest
+  static final ArchRule SPRING_COMPONENTS_HAVE_AN_UNAMBIGUOUS_CONSTRUCTOR =
+      classes()
+          .that()
+          .areAnnotatedWith("org.springframework.stereotype.Repository")
+          .or()
+          .areAnnotatedWith("org.springframework.stereotype.Service")
+          .or()
+          .areAnnotatedWith("org.springframework.stereotype.Component")
+          .or()
+          .areAnnotatedWith("org.springframework.web.bind.annotation.RestController")
+          .should(haveAConstructorSpringCanChoose())
+          .as(
+              "D20: a scanned Spring component must have exactly one constructor, or mark one"
+                  + " @Autowired — otherwise component scan falls back to a no-arg constructor that"
+                  + " does not exist and the application fails to start");
+
+  private static ArchCondition<JavaClass> haveAConstructorSpringCanChoose() {
+    return new ArchCondition<>("have a constructor Spring can choose") {
+      @Override
+      public void check(JavaClass item, ConditionEvents events) {
+        var constructors =
+            item.getConstructors().stream()
+                .filter(constructor -> !constructor.getModifiers().contains(JavaModifier.SYNTHETIC))
+                .toList();
+        if (constructors.size() <= 1) {
+          return;
+        }
+        boolean autowired =
+            constructors.stream()
+                .anyMatch(
+                    constructor ->
+                        constructor.getAnnotations().stream()
+                            .anyMatch(
+                                annotation ->
+                                    annotation
+                                        .getRawType()
+                                        .getName()
+                                        .equals(
+                                            "org.springframework.beans.factory.annotation.Autowired")));
+        if (!autowired) {
+          events.add(
+              SimpleConditionEvent.violated(
+                  item,
+                  item.getName()
+                      + " declares "
+                      + constructors.size()
+                      + " constructors and marks none @Autowired;"
+                      + " component scan cannot choose one"));
+        }
+      }
+    };
+  }
 }

src/app-bootstrap/src/test/java/dev/caskeleton/bootstrap/contract/ActuatorSecurityHttpTest.java

@@ -11,6 +11,8 @@ import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.data.jpa.autoconfigure.DataJpaRepositoriesAutoConfiguration;
+import org.springframework.boot.data.redis.autoconfigure.DataRedisAutoConfiguration;
+import org.springframework.boot.data.redis.autoconfigure.DataRedisReactiveAutoConfiguration;
 import org.springframework.boot.flyway.autoconfigure.FlywayAutoConfiguration;
 import org.springframework.boot.hibernate.autoconfigure.HibernateJpaAutoConfiguration;
 import org.springframework.boot.jdbc.autoconfigure.DataSourceAutoConfiguration;
@@ -117,13 +119,21 @@ class ActuatorSecurityHttpTest {
         .andExpect(status().isForbidden());
   }
 
+  /*
+   * Redis 도 함께 제외한다. 빼지 않으면 reactive Redis health indicator 가 이 슬라이스에 그대로
+   * 올라와 localhost:6379 로 붙으려 하고, 실패하면 /actuator/health 가 503 이 된다. 그러면 이
+   * 테스트는 "probe 가 permitAll 인가" 가 아니라 "이 기계에 Redis 가 떠 있는가" 를 재게 된다 —
+   * 보안 태세와 아무 상관 없는 이유로 빨개진다.
+   */
   @EnableAutoConfiguration(
       exclude = {
         DataSourceAutoConfiguration.class,
         DataSourceTransactionManagerAutoConfiguration.class,
         HibernateJpaAutoConfiguration.class,
         DataJpaRepositoriesAutoConfiguration.class,
-        FlywayAutoConfiguration.class
+        FlywayAutoConfiguration.class,
+        DataRedisAutoConfiguration.class,
+        DataRedisReactiveAutoConfiguration.class
       })
   @Import(ManagementSecurityConfig.class)
   static class MinimalActuatorApp {}

src/application-core/src/main/java/dev/caskeleton/application/techlog/management/command/CreateProjectActivityCommand.java

@@ -0,0 +1,19 @@
+package dev.caskeleton.application.techlog.management.command;
+
+import java.time.Instant;
+import java.util.UUID;
+
+/**
+ * {@code createProjectActivity}. {@code origin} 은 명령이 정하지 않는다 — 이 경로로 들어온 것은 언제나 {@code MANUAL} 이다.
+ */
+public record CreateProjectActivityCommand(
+    UUID projectId,
+    long expectedProjectVersion,
+    String activityType,
+    String title,
+    String summary,
+    String visibility,
+    String relatedResourceType,
+    UUID relatedResourceId,
+    Instant occurredAt,
+    String actor) {}

src/application-core/src/main/java/dev/caskeleton/application/techlog/management/command/UpdateHomeFocusCommand.java

@@ -0,0 +1,16 @@
+package dev.caskeleton.application.techlog.management.command;
+
+import java.util.UUID;
+
+/**
+ * {@code updateHomeFocus}. 세 슬롯은 전부 nullable 이고, null 은 "이 슬롯을 비운다" 는 뜻이다 — 부분 수정이 아니라 전체 교체다.
+ *
+ * <p>부분 수정으로 두면 "비우기" 를 표현할 방법이 없어진다. 화면이 세 칸을 한 번에 보여 주고 한 번에 저장하므로 전체 교체가 화면과도 맞다.
+ */
+public record UpdateHomeFocusCommand(
+    long expectedVersion,
+    String defaultType,
+    UUID currentProjectId,
+    UUID openQuestionId,
+    UUID recentDecisionId,
+    String actor) {}

src/application-core/src/main/java/dev/caskeleton/application/techlog/management/command/UpdateProjectActivityCommand.java

@@ -0,0 +1,20 @@
+package dev.caskeleton.application.techlog.management.command;
+
+import java.time.Instant;
+import java.util.UUID;
+
+/**
+ * {@code updateProjectActivity}.
+ *
+ * <p>{@code activityType} 과 관련 자원은 고칠 수 없다 — 그것을 바꾸면 같은 줄이 다른 사건을 가리키게 된다. 바꿀 수 있는 것은 사람이 읽는
+ * 부분(제목·요약)과 노출 여부, 그리고 언제 일어난 일인지다.
+ */
+public record UpdateProjectActivityCommand(
+    UUID projectId,
+    UUID activityId,
+    long expectedVersion,
+    String title,
+    String summary,
+    String visibility,
+    Instant occurredAt,
+    String actor) {}

src/application-core/src/main/java/dev/caskeleton/application/techlog/management/command/UpdateProjectCommand.java

@@ -17,11 +17,13 @@ public record UpdateProjectCommand(
     String currentObjective,
     String nextStep,
     List<String> technologyLabels,
+    List<UUID> topicIds,
     String targetVisibility,
     Integer featuredOrder,
     String actor) {
 
   public UpdateProjectCommand {
     technologyLabels = technologyLabels == null ? List.of() : List.copyOf(technologyLabels);
+    topicIds = topicIds == null ? List.of() : List.copyOf(topicIds);
   }
 }

src/application-core/src/main/java/dev/caskeleton/application/techlog/management/model/HomeFocusConfigView.java

@@ -0,0 +1,16 @@
+package dev.caskeleton.application.techlog.management.model;
+
+import java.util.UUID;
+
+/**
+ * 홈 화면이 무엇을 앞에 둘지 정하는 단일 행 설정. 계약 {@code HomeFocusResponse} 의 application 표현.
+ *
+ * <p>세 슬롯은 모두 nullable 이다. 비어 있다는 것은 "고르지 않았다" 는 뜻이고, 공개 화면은 그때 focus 영역을 아예 그리지 않는다.
+ */
+public record HomeFocusConfigView(
+    UUID id,
+    long version,
+    String defaultType,
+    UUID currentProjectId,
+    UUID openQuestionId,
+    UUID recentDecisionId) {}

src/application-core/src/main/java/dev/caskeleton/application/techlog/management/model/ProjectActivityView.java

@@ -0,0 +1,23 @@
+package dev.caskeleton.application.techlog.management.model;
+
+import java.time.Instant;
+import java.util.UUID;
+
+/**
+ * 계약 {@code ProjectActivityResponse}.
+ *
+ * <p>{@code origin} 은 이 줄이 어디서 왔는지다 — 게시 같은 실제 사건이 남긴 {@code AUTO} 인지, 작성자가 손으로 적은 {@code MANUAL}
+ * 인지. 지우기가 그 둘을 다르게 다루므로 뷰에도 실어 보낸다.
+ */
+public record ProjectActivityView(
+    UUID id,
+    UUID projectId,
+    String activityType,
+    String title,
+    String summary,
+    String visibility,
+    String origin,
+    String relatedResourceType,
+    UUID relatedResourceId,
+    Instant occurredAt,
+    long version) {}

src/application-core/src/main/java/dev/caskeleton/application/techlog/management/model/ProjectEditView.java

@@ -7,8 +7,10 @@ import java.util.UUID;
 /**
  * 계약 {@code ProjectEditResponse}.
  *
- * <p>{@code topicIds}/{@code documentLinks}/{@code questionLinks} 는 링크 테이블이 소유한다. (가) 범위에서는 그 편집
+ * <p>{@code topicIds} 는 {@code project_topic} 이 소유한다. 프로젝트 편집 화면이 이 목록을 고르고, 공개 프로젝트 화면의 "주요 주제" 가
- * 화면이 없으므로 항상 비어 있고, 링크를 다루는 화면이 생길 때 같은 뷰에 채운다.
+ * 그 결과를 그린다 — 그 화면은 처음부터 주제를 읽고 있었지만 저장할 경로가 없어 늘 비어 있었다.
+ *
+ * <p>{@code documentLinks}/{@code questionLinks} 는 아직 편집 화면이 없어 항상 비어 있다.
  */
 public record ProjectEditView(
     UUID id,
@@ -23,6 +25,7 @@ public record ProjectEditView(
     String currentObjective,
     String nextStep,
     List<String> technologyLabels,
+    List<UUID> topicIds,
     String workflowStatus,
     String targetVisibility,
     Integer featuredOrder,
@@ -32,5 +35,6 @@ public record ProjectEditView(
 
   public ProjectEditView {
     technologyLabels = technologyLabels == null ? List.of() : List.copyOf(technologyLabels);
+    topicIds = topicIds == null ? List.of() : List.copyOf(topicIds);
   }
 }

src/application-core/src/main/java/dev/caskeleton/application/techlog/management/port/out/HomeFocusConfigPort.java

@@ -0,0 +1,22 @@
+package dev.caskeleton.application.techlog.management.port.out;
+
+import dev.caskeleton.application.techlog.management.command.UpdateHomeFocusCommand;
+import dev.caskeleton.application.techlog.management.model.HomeFocusConfigView;
+import java.util.Optional;
+import java.util.UUID;
+
+/** 홈 focus 설정의 편집용 읽기/쓰기. 공개 조회는 {@code publicsite} 쪽 포트가 따로 소유한다. */
+public interface HomeFocusConfigPort {
+
+  /** 단일 행이므로 조회는 실패하지 않는다. 마이그레이션이 빈 행을 이미 넣어 두었다. */
+  HomeFocusConfigView load();
+
+  /** 낙관적 잠금. 버전이 어긋나면 {@code Optional.empty()}. */
+  Optional<HomeFocusConfigView> update(UpdateHomeFocusCommand command);
+
+  boolean projectExists(UUID id);
+
+  boolean questionExists(UUID id);
+
+  boolean decisionExists(UUID id);
+}

src/application-core/src/main/java/dev/caskeleton/application/techlog/management/port/out/ProjectActivityRepositoryPort.java

@@ -0,0 +1,25 @@
+package dev.caskeleton.application.techlog.management.port.out;
+
+import dev.caskeleton.application.techlog.management.command.CreateProjectActivityCommand;
+import dev.caskeleton.application.techlog.management.command.UpdateProjectActivityCommand;
+import dev.caskeleton.application.techlog.management.model.ProjectActivityView;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+
+/** 프로젝트 활동의 편집용 읽기/쓰기. 공개 조회는 {@code publicsite} 쪽 포트가 따로 소유한다. */
+public interface ProjectActivityRepositoryPort {
+
+  /** 최근 것이 먼저다 — 공개 타임라인과 같은 정렬이라 편집기와 화면이 같은 순서를 본다. */
+  List<ProjectActivityView> listByProject(UUID projectId);
+
+  Optional<ProjectActivityView> find(UUID projectId, UUID activityId);
+
+  ProjectActivityView create(CreateProjectActivityCommand command);
+
+  /** 낙관적 잠금. 버전이 어긋나면 {@code Optional.empty()}. */
+  Optional<ProjectActivityView> update(UpdateProjectActivityCommand command);
+
+  /** 삭제된 행 수. 0 이면 없거나 버전이 어긋난 것이다. */
+  int delete(UUID projectId, UUID activityId, long expectedVersion);
+}

src/application-core/src/main/java/dev/caskeleton/application/techlog/management/port/out/ProjectRepositoryPort.java

@@ -25,5 +25,16 @@ public interface ProjectRepositoryPort {
 
   boolean isReferenced(UUID id);
 
+  /**
+   * 공개 게시. 프로젝트는 Studio 문서가 아니라 {@code RecordKind} 에 없고, 따라서 문서 게시 파이프라인을 타지 않는다. 공개 화면들은 모두 {@code
+   * public_resource_projection} 의 {@code PROJECT} 행을 가시성 관문으로 쓰므로, 그 행을 세우는 것이 곧 게시다.
+   *
+   * <p>버전이 어긋나면 {@code Optional.empty()}.
+   */
+  Optional<ProjectEditView> publish(UUID id, long expectedVersion, String visibility, String actor);
+
+  /** 게시 취소. 투영 행은 지우지 않고 {@code WITHDRAWN} 으로 내린다 — 지우면 다시 게시할 때 이력이 끊긴다. */
+  Optional<ProjectEditView> unpublish(UUID id, long expectedVersion, String actor);
+
   boolean slugTaken(String slug, UUID exceptId);
 }

src/application-core/src/main/java/dev/caskeleton/application/techlog/management/service/CreateProjectActivityUseCase.java

@@ -0,0 +1,73 @@
+package dev.caskeleton.application.techlog.management.service;
+
+import dev.caskeleton.application.capability.Idempotency;
+import dev.caskeleton.application.capability.RepositoryAccess;
+import dev.caskeleton.application.capability.UseCaseCapability;
+import dev.caskeleton.application.security.RequiresPermission;
+import dev.caskeleton.application.techlog.error.ManagementError;
+import dev.caskeleton.application.techlog.error.ManagementException;
+import dev.caskeleton.application.techlog.management.command.CreateProjectActivityCommand;
+import dev.caskeleton.application.techlog.management.model.ProjectActivityView;
+import dev.caskeleton.application.techlog.management.model.ProjectEditView;
+import dev.caskeleton.application.techlog.management.port.out.ProjectActivityRepositoryPort;
+import dev.caskeleton.application.techlog.management.port.out.ProjectRepositoryPort;
+import dev.caskeleton.application.techlog.studio.service.StudioPermissions;
+import dev.caskeleton.application.transaction.TransactionMode;
+import dev.caskeleton.application.transaction.TransactionPort;
+import java.util.Objects;
+
+/**
+ * {@code createProjectActivity}.
+ *
+ * <p>{@code expectedProjectVersion} 은 활동이 아니라 <em>프로젝트</em>의 버전이다. 활동은 아직 없으므로 자기 버전을 가질 수 없고, 두
+ * 사람이 같은 프로젝트의 타임라인을 동시에 고치는 것을 막으려면 붙잡을 것이 프로젝트뿐이다.
+ */
+@RequiresPermission(StudioPermissions.WRITE)
+@UseCaseCapability(
+    transactionMode = TransactionMode.WRITE,
+    idempotency = Idempotency.NOT_IDEMPOTENT,
+    repositoryAccess = RepositoryAccess.WRITE_REPOSITORY)
+public class CreateProjectActivityUseCase {
+
+  private final ProjectActivityRepositoryPort activities;
+  private final ProjectRepositoryPort projects;
+  private final TransactionPort transactions;
+
+  public CreateProjectActivityUseCase(
+      ProjectActivityRepositoryPort activities,
+      ProjectRepositoryPort projects,
+      TransactionPort transactions) {
+    this.activities = Objects.requireNonNull(activities, "activities");
+    this.projects = Objects.requireNonNull(projects, "projects");
+    this.transactions = Objects.requireNonNull(transactions, "transactions");
+  }
+
+  public ProjectActivityView handle(CreateProjectActivityCommand command) {
+    Objects.requireNonNull(command, "command");
+    ProjectActivityUseCases.requireType(command.activityType());
+    ProjectActivityUseCases.requireVisibility(command.visibility());
+    ProjectActivityUseCases.requireTitle(command.title());
+    if (command.occurredAt() == null) {
+      throw ManagementException.of(
+          ManagementError.REQUEST_VALIDATION_FAILED, "occurredAt must not be null");
+    }
+
+    return transactions.inWrite(
+        () -> {
+          ProjectEditView project =
+              projects
+                  .find(command.projectId())
+                  .orElseThrow(
+                      () ->
+                          ManagementException.of(
+                              ManagementError.PROJECT_NOT_FOUND, "no such project"));
+          if (project.version() != command.expectedProjectVersion()) {
+            throw ManagementException.withDetails(
+                ManagementError.VERSION_CONFLICT,
+                "the project changed since it was loaded",
+                new SaveTopicUseCase.VersionConflict(project.version()));
+          }
+          return activities.create(command);
+        });
+  }
+}

src/application-core/src/main/java/dev/caskeleton/application/techlog/management/service/DeleteProjectActivityUseCase.java

@@ -0,0 +1,68 @@
+package dev.caskeleton.application.techlog.management.service;
+
+import dev.caskeleton.application.capability.Idempotency;
+import dev.caskeleton.application.capability.RepositoryAccess;
+import dev.caskeleton.application.capability.UseCaseCapability;
+import dev.caskeleton.application.security.RequiresPermission;
+import dev.caskeleton.application.techlog.error.ManagementError;
+import dev.caskeleton.application.techlog.error.ManagementException;
+import dev.caskeleton.application.techlog.management.model.ProjectActivityView;
+import dev.caskeleton.application.techlog.management.port.out.ProjectActivityRepositoryPort;
+import dev.caskeleton.application.techlog.studio.service.StudioPermissions;
+import dev.caskeleton.application.transaction.TransactionMode;
+import dev.caskeleton.application.transaction.TransactionPort;
+import java.util.Objects;
+import java.util.UUID;
+
+/**
+ * {@code deleteProjectActivity}.
+ *
+ * <p>{@code AUTO} 로 기록된 줄은 지우지 않는다. 그것은 게시 같은 실제 사건이 남긴 흔적이고, 지우면 무슨 일이 있었는지가 사라진다. 손으로 적은 {@code
+ * MANUAL} 줄만 지울 수 있다 — 잘못 적은 것을 되돌리는 것과 일어난 일을 없애는 것은 다르다.
+ */
+@RequiresPermission(StudioPermissions.WRITE)
+@UseCaseCapability(
+    transactionMode = TransactionMode.WRITE,
+    idempotency = Idempotency.NOT_IDEMPOTENT,
+    repositoryAccess = RepositoryAccess.WRITE_REPOSITORY)
+public class DeleteProjectActivityUseCase {
+
+  private final ProjectActivityRepositoryPort activities;
+  private final TransactionPort transactions;
+
+  public DeleteProjectActivityUseCase(
+      ProjectActivityRepositoryPort activities, TransactionPort transactions) {
+    this.activities = Objects.requireNonNull(activities, "activities");
+    this.transactions = Objects.requireNonNull(transactions, "transactions");
+  }
+
+  public void handle(UUID projectId, UUID activityId, long expectedVersion, String actor) {
+    Objects.requireNonNull(projectId, "projectId");
+    Objects.requireNonNull(activityId, "activityId");
+    Objects.requireNonNull(actor, "actor");
+
+    transactions.inWrite(
+        () -> {
+          ProjectActivityView current =
+              activities
+                  .find(projectId, activityId)
+                  .orElseThrow(
+                      () ->
+                          ManagementException.of(
+                              ManagementError.PROJECT_NOT_FOUND,
+                              "no such activity on this project"));
+          if (!"MANUAL".equals(current.origin())) {
+            throw ManagementException.of(
+                ManagementError.PROJECT_IN_USE,
+                "an automatically recorded activity cannot be deleted");
+          }
+          if (activities.delete(projectId, activityId, expectedVersion) == 0) {
+            throw ManagementException.withDetails(
+                ManagementError.VERSION_CONFLICT,
+                "the activity changed since it was loaded",
+                new SaveTopicUseCase.VersionConflict(current.version()));
+          }
+          return null;
+        });
+  }
+}

src/application-core/src/main/java/dev/caskeleton/application/techlog/management/service/GetHomeFocusUseCase.java

@@ -0,0 +1,35 @@
+package dev.caskeleton.application.techlog.management.service;
+
+import dev.caskeleton.application.capability.Idempotency;
+import dev.caskeleton.application.capability.RepositoryAccess;
+import dev.caskeleton.application.capability.UseCaseCapability;
+import dev.caskeleton.application.security.RequiresPermission;
+import dev.caskeleton.application.techlog.management.model.HomeFocusConfigView;
+import dev.caskeleton.application.techlog.management.port.out.HomeFocusConfigPort;
+import dev.caskeleton.application.techlog.studio.service.StudioPermissions;
+import dev.caskeleton.application.transaction.TransactionMode;
+import dev.caskeleton.application.transaction.TransactionPort;
+import java.util.Objects;
+
+/*
+ * final 이 아닌 이유는 다른 use case 들과 같다 — @RequiresPermission 이 CGLIB 프록시로 강제된다.
+ */
+@RequiresPermission(StudioPermissions.READ)
+@UseCaseCapability(
+    transactionMode = TransactionMode.READ_ONLY,
+    idempotency = Idempotency.IDEMPOTENT,
+    repositoryAccess = RepositoryAccess.READ_REPOSITORY)
+public class GetHomeFocusUseCase {
+
+  private final HomeFocusConfigPort config;
+  private final TransactionPort transactions;
+
+  public GetHomeFocusUseCase(HomeFocusConfigPort config, TransactionPort transactions) {
+    this.config = Objects.requireNonNull(config, "config");
+    this.transactions = Objects.requireNonNull(transactions, "transactions");
+  }
+
+  public HomeFocusConfigView handle() {
+    return transactions.inRead(config::load);
+  }
+}

src/application-core/src/main/java/dev/caskeleton/application/techlog/management/service/ListStudioProjectActivitiesUseCase.java

@@ -0,0 +1,36 @@
+package dev.caskeleton.application.techlog.management.service;
+
+import dev.caskeleton.application.capability.Idempotency;
+import dev.caskeleton.application.capability.RepositoryAccess;
+import dev.caskeleton.application.capability.UseCaseCapability;
+import dev.caskeleton.application.security.RequiresPermission;
+import dev.caskeleton.application.techlog.management.model.ProjectActivityView;
+import dev.caskeleton.application.techlog.management.port.out.ProjectActivityRepositoryPort;
+import dev.caskeleton.application.techlog.studio.service.StudioPermissions;
+import dev.caskeleton.application.transaction.TransactionMode;
+import dev.caskeleton.application.transaction.TransactionPort;
+import java.util.List;
+import java.util.Objects;
+import java.util.UUID;
+
+@RequiresPermission(StudioPermissions.READ)
+@UseCaseCapability(
+    transactionMode = TransactionMode.READ_ONLY,
+    idempotency = Idempotency.IDEMPOTENT,
+    repositoryAccess = RepositoryAccess.READ_REPOSITORY)
+public class ListStudioProjectActivitiesUseCase {
+
+  private final ProjectActivityRepositoryPort activities;
+  private final TransactionPort transactions;
+
+  public ListStudioProjectActivitiesUseCase(
+      ProjectActivityRepositoryPort activities, TransactionPort transactions) {
+    this.activities = Objects.requireNonNull(activities, "activities");
+    this.transactions = Objects.requireNonNull(transactions, "transactions");
+  }
+
+  public List<ProjectActivityView> handle(UUID projectId) {
+    Objects.requireNonNull(projectId, "projectId");
+    return transactions.inRead(() -> activities.listByProject(projectId));
+  }
+}

src/application-core/src/main/java/dev/caskeleton/application/techlog/management/service/ProjectActivityUseCases.java

@@ -0,0 +1,51 @@
+package dev.caskeleton.application.techlog.management.service;
+
+import dev.caskeleton.application.techlog.error.ManagementError;
+import dev.caskeleton.application.techlog.error.ManagementException;
+import java.util.Set;
+
+/** 활동 use case 넷이 공유하는 규칙. 값의 허용 집합은 DB CHECK 제약과 같은 목록이다. */
+final class ProjectActivityUseCases {
+
+  /** {@code project_activity_activity_type_check} 와 같은 목록이다. */
+  static final Set<String> TYPES =
+      Set.of(
+          "PHASE_CHANGED",
+          "QUESTION_OPENED",
+          "QUESTION_RESOLVED",
+          "DECISION_ACCEPTED",
+          "CASE_PUBLISHED",
+          "REFERENCE_PUBLISHED",
+          "MILESTONE_REACHED",
+          "PROJECT_PAUSED",
+          "PROJECT_RESUMED");
+
+  static final Set<String> VISIBILITIES = Set.of("PRIVATE", "PUBLIC");
+
+  private ProjectActivityUseCases() {}
+
+  /*
+   * 제약 위반을 그대로 터뜨리지 않고 여기서 먼저 거절한다. 드라이버가 던지는 것은 벤더 메시지 문자열이고,
+   * 그것을 화면에 그대로 내보내면 작성자는 무엇을 고쳐야 하는지 알 수 없다.
+   */
+  static void requireType(String value) {
+    if (value == null || !TYPES.contains(value)) {
+      throw ManagementException.of(
+          ManagementError.REQUEST_VALIDATION_FAILED, "activityType is not a known activity type");
+    }
+  }
+
+  static void requireVisibility(String value) {
+    if (value == null || !VISIBILITIES.contains(value)) {
+      throw ManagementException.of(
+          ManagementError.REQUEST_VALIDATION_FAILED, "visibility must be PRIVATE or PUBLIC");
+    }
+  }
+
+  static void requireTitle(String value) {
+    if (value == null || value.isBlank()) {
+      throw ManagementException.of(
+          ManagementError.REQUEST_VALIDATION_FAILED, "title must not be blank");
+    }
+  }
+}

src/application-core/src/main/java/dev/caskeleton/application/techlog/management/service/PublishProjectUseCase.java

@@ -0,0 +1,76 @@
+package dev.caskeleton.application.techlog.management.service;
+
+import dev.caskeleton.application.capability.Idempotency;
+import dev.caskeleton.application.capability.RepositoryAccess;
+import dev.caskeleton.application.capability.UseCaseCapability;
+import dev.caskeleton.application.security.RequiresPermission;
+import dev.caskeleton.application.techlog.error.ManagementError;
+import dev.caskeleton.application.techlog.error.ManagementException;
+import dev.caskeleton.application.techlog.management.model.ProjectEditView;
+import dev.caskeleton.application.techlog.management.port.out.ProjectRepositoryPort;
+import dev.caskeleton.application.techlog.studio.service.StudioPermissions;
+import dev.caskeleton.application.transaction.TransactionMode;
+import dev.caskeleton.application.transaction.TransactionPort;
+import java.util.Objects;
+import java.util.Set;
+import java.util.UUID;
+
+/**
+ * {@code publishProject}.
+ *
+ * <p>프로젝트는 Studio 문서가 아니다 — {@code RecordKind} 에 없고 본문도 검증 대상도 없다. 그래서 문서 게시 파이프라인 대신 여기서 직접 공개 상태를
+ * 세운다. 릴리스가 자체 경로를 갖는 것과 같은 이유다.
+ *
+ * <p>slug 가 없으면 거절한다. 공개 주소가 {@code /projects/<slug>} 이므로 slug 없이 게시하면 아무도 닿을 수 없는 페이지가 생긴다 — 저장은
+ * 성공했는데 링크는 없는, 이유를 알 수 없는 상태다.
+ */
+@RequiresPermission(StudioPermissions.WRITE)
+@UseCaseCapability(
+    transactionMode = TransactionMode.WRITE,
+    idempotency = Idempotency.NOT_IDEMPOTENT,
+    repositoryAccess = RepositoryAccess.WRITE_REPOSITORY)
+public class PublishProjectUseCase {
+
+  private static final Set<String> VISIBILITIES = Set.of("PUBLIC", "UNLISTED");
+
+  private final ProjectRepositoryPort projects;
+  private final TransactionPort transactions;
+
+  public PublishProjectUseCase(ProjectRepositoryPort projects, TransactionPort transactions) {
+    this.projects = Objects.requireNonNull(projects, "projects");
+    this.transactions = Objects.requireNonNull(transactions, "transactions");
+  }
+
+  public ProjectEditView handle(UUID id, long expectedVersion, String visibility, String actor) {
+    Objects.requireNonNull(id, "id");
+    String requested = visibility == null ? "PUBLIC" : visibility;
+    if (!VISIBILITIES.contains(requested)) {
+      throw ManagementException.of(
+          ManagementError.REQUEST_VALIDATION_FAILED, "visibility must be PUBLIC or UNLISTED");
+    }
+
+    return transactions.inWrite(
+        () -> {
+          ProjectEditView current =
+              projects
+                  .find(id)
+                  .orElseThrow(
+                      () ->
+                          ManagementException.of(
+                              ManagementError.PROJECT_NOT_FOUND, "no such project"));
+          if (current.slug() == null || current.slug().isBlank()) {
+            throw ManagementException.of(
+                ManagementError.REQUEST_VALIDATION_FAILED,
+                "a slug is required before a project can be published");
+          }
+          return projects
+              .publish(id, expectedVersion, requested, actor)
+              .orElseThrow(
+                  () ->
+                      ManagementException.withDetails(
+                          ManagementError.VERSION_CONFLICT,
+                          "the project changed since it was loaded",
+                          new SaveTopicUseCase.VersionConflict(current.version())));
+        });
+  }
+}

src/application-core/src/main/java/dev/caskeleton/application/techlog/management/service/UnpublishProjectUseCase.java

@@ -0,0 +1,54 @@
+package dev.caskeleton.application.techlog.management.service;
+
+import dev.caskeleton.application.capability.Idempotency;
+import dev.caskeleton.application.capability.RepositoryAccess;
+import dev.caskeleton.application.capability.UseCaseCapability;
+import dev.caskeleton.application.security.RequiresPermission;
+import dev.caskeleton.application.techlog.error.ManagementError;
+import dev.caskeleton.application.techlog.error.ManagementException;
+import dev.caskeleton.application.techlog.management.model.ProjectEditView;
+import dev.caskeleton.application.techlog.management.port.out.ProjectRepositoryPort;
+import dev.caskeleton.application.techlog.studio.service.StudioPermissions;
+import dev.caskeleton.application.transaction.TransactionMode;
+import dev.caskeleton.application.transaction.TransactionPort;
+import java.util.Objects;
+import java.util.UUID;
+
+/** {@code unpublishProject}. 투영 행은 지우지 않고 {@code WITHDRAWN} 으로 내린다. */
+@RequiresPermission(StudioPermissions.WRITE)
+@UseCaseCapability(
+    transactionMode = TransactionMode.WRITE,
+    idempotency = Idempotency.NOT_IDEMPOTENT,
+    repositoryAccess = RepositoryAccess.WRITE_REPOSITORY)
+public class UnpublishProjectUseCase {
+
+  private final ProjectRepositoryPort projects;
+  private final TransactionPort transactions;
+
+  public UnpublishProjectUseCase(ProjectRepositoryPort projects, TransactionPort transactions) {
+    this.projects = Objects.requireNonNull(projects, "projects");
+    this.transactions = Objects.requireNonNull(transactions, "transactions");
+  }
+
+  public ProjectEditView handle(UUID id, long expectedVersion, String actor) {
+    Objects.requireNonNull(id, "id");
+    return transactions.inWrite(
+        () -> {
+          ProjectEditView current =
+              projects
+                  .find(id)
+                  .orElseThrow(
+                      () ->
+                          ManagementException.of(
+                              ManagementError.PROJECT_NOT_FOUND, "no such project"));
+          return projects
+              .unpublish(id, expectedVersion, actor)
+              .orElseThrow(
+                  () ->
+                      ManagementException.withDetails(
+                          ManagementError.VERSION_CONFLICT,
+                          "the project changed since it was loaded",
+                          new SaveTopicUseCase.VersionConflict(current.version())));
+        });
+  }
+}

src/application-core/src/main/java/dev/caskeleton/application/techlog/management/service/UpdateHomeFocusUseCase.java

@@ -0,0 +1,89 @@
+package dev.caskeleton.application.techlog.management.service;
+
+import dev.caskeleton.application.capability.Idempotency;
+import dev.caskeleton.application.capability.RepositoryAccess;
+import dev.caskeleton.application.capability.UseCaseCapability;
+import dev.caskeleton.application.security.RequiresPermission;
+import dev.caskeleton.application.techlog.error.ManagementError;
+import dev.caskeleton.application.techlog.error.ManagementException;
+import dev.caskeleton.application.techlog.management.command.UpdateHomeFocusCommand;
+import dev.caskeleton.application.techlog.management.model.HomeFocusConfigView;
+import dev.caskeleton.application.techlog.management.port.out.HomeFocusConfigPort;
+import dev.caskeleton.application.techlog.studio.service.StudioPermissions;
+import dev.caskeleton.application.transaction.TransactionMode;
+import dev.caskeleton.application.transaction.TransactionPort;
+import java.util.Objects;
+import java.util.Set;
+import java.util.UUID;
+
+/**
+ * {@code updateHomeFocus}.
+ *
+ * <p>지목한 대상이 실제로 있는지 여기서 먼저 확인한다. 테이블에는 FK 가 없어서 (설정이 대상보다 오래 살아남는 것을 허용하는 설계다) 없는 id 를 그대로 저장할 수
+ * 있고, 그러면 공개 화면은 조용히 빈 focus 를 그린다 — 저장은 성공했는데 화면에는 아무것도 안 나오는, 이유를 알 수 없는 실패가 된다.
+ *
+ * <p>대상이 <em>공개</em>인지는 확인하지 않는다. 아직 게시하지 않은 프로젝트를 미리 지목해 두고 게시와 동시에 홈에 뜨게 하는 것이 정상적인 순서다. 공개 여부는
+ * 공개 조회 쪽이 매번 다시 판단한다.
+ */
+@RequiresPermission(StudioPermissions.WRITE)
+@UseCaseCapability(
+    transactionMode = TransactionMode.WRITE,
+    idempotency = Idempotency.NOT_IDEMPOTENT,
+    repositoryAccess = RepositoryAccess.WRITE_REPOSITORY)
+public class UpdateHomeFocusUseCase {
+
+  private static final Set<String> DEFAULT_TYPES =
+      Set.of("CURRENT_WORK", "OPEN_QUESTION", "RECENT_DECISION");
+
+  private final HomeFocusConfigPort config;
+  private final TransactionPort transactions;
+
+  public UpdateHomeFocusUseCase(HomeFocusConfigPort config, TransactionPort transactions) {
+    this.config = Objects.requireNonNull(config, "config");
+    this.transactions = Objects.requireNonNull(transactions, "transactions");
+  }
+
+  public HomeFocusConfigView handle(UpdateHomeFocusCommand command) {
+    Objects.requireNonNull(command, "command");
+    if (command.defaultType() != null && !DEFAULT_TYPES.contains(command.defaultType())) {
+      throw ManagementException.of(
+          ManagementError.REQUEST_VALIDATION_FAILED, "defaultType is not a known focus type");
+    }
+
+    return transactions.inWrite(
+        () -> {
+          requireExists(
+              command.currentProjectId(),
+              config::projectExists,
+              ManagementError.PROJECT_NOT_FOUND,
+              "no such project");
+          requireExists(
+              command.openQuestionId(),
+              config::questionExists,
+              ManagementError.QUESTION_NOT_FOUND,
+              "no such question");
+          requireExists(
+              command.recentDecisionId(),
+              config::decisionExists,
+              ManagementError.DECISION_NOT_FOUND,
+              "no such decision");
+
+          HomeFocusConfigView current = config.load();
+          return config
+              .update(command)
+              .orElseThrow(
+                  () ->
+                      ManagementException.withDetails(
+                          ManagementError.VERSION_CONFLICT,
+                          "the home focus changed since it was loaded",
+                          new SaveTopicUseCase.VersionConflict(current.version())));
+        });
+  }
+
+  private static void requireExists(
+      UUID id, java.util.function.Predicate<UUID> exists, ManagementError error, String message) {
+    if (id != null && !exists.test(id)) {
+      throw ManagementException.of(error, message);
+    }
+  }
+}

src/application-core/src/main/java/dev/caskeleton/application/techlog/management/service/UpdateProjectActivityUseCase.java

@@ -0,0 +1,63 @@
+package dev.caskeleton.application.techlog.management.service;
+
+import dev.caskeleton.application.capability.Idempotency;
+import dev.caskeleton.application.capability.RepositoryAccess;
+import dev.caskeleton.application.capability.UseCaseCapability;
+import dev.caskeleton.application.security.RequiresPermission;
+import dev.caskeleton.application.techlog.error.ManagementError;
+import dev.caskeleton.application.techlog.error.ManagementException;
+import dev.caskeleton.application.techlog.management.command.UpdateProjectActivityCommand;
+import dev.caskeleton.application.techlog.management.model.ProjectActivityView;
+import dev.caskeleton.application.techlog.management.port.out.ProjectActivityRepositoryPort;
+import dev.caskeleton.application.techlog.studio.service.StudioPermissions;
+import dev.caskeleton.application.transaction.TransactionMode;
+import dev.caskeleton.application.transaction.TransactionPort;
+import java.util.Objects;
+
+/** {@code updateProjectActivity}. */
+@RequiresPermission(StudioPermissions.WRITE)
+@UseCaseCapability(
+    transactionMode = TransactionMode.WRITE,
+    idempotency = Idempotency.NOT_IDEMPOTENT,
+    repositoryAccess = RepositoryAccess.WRITE_REPOSITORY)
+public class UpdateProjectActivityUseCase {
+
+  private final ProjectActivityRepositoryPort activities;
+  private final TransactionPort transactions;
+
+  public UpdateProjectActivityUseCase(
+      ProjectActivityRepositoryPort activities, TransactionPort transactions) {
+    this.activities = Objects.requireNonNull(activities, "activities");
+    this.transactions = Objects.requireNonNull(transactions, "transactions");
+  }
+
+  public ProjectActivityView handle(UpdateProjectActivityCommand command) {
+    Objects.requireNonNull(command, "command");
+    ProjectActivityUseCases.requireVisibility(command.visibility());
+    ProjectActivityUseCases.requireTitle(command.title());
+    if (command.occurredAt() == null) {
+      throw ManagementException.of(
+          ManagementError.REQUEST_VALIDATION_FAILED, "occurredAt must not be null");
+    }
+
+    return transactions.inWrite(
+        () -> {
+          ProjectActivityView current =
+              activities
+                  .find(command.projectId(), command.activityId())
+                  .orElseThrow(
+                      () ->
+                          ManagementException.of(
+                              ManagementError.PROJECT_NOT_FOUND,
+                              "no such activity on this project"));
+          return activities
+              .update(command)
+              .orElseThrow(
+                  () ->
+                      ManagementException.withDetails(
+                          ManagementError.VERSION_CONFLICT,
+                          "the activity changed since it was loaded",
+                          new SaveTopicUseCase.VersionConflict(current.version())));
+        });
+  }
+}

src/application-core/src/main/java/dev/caskeleton/application/techlog/publicsite/model/BodyAssetView.java

@@ -6,8 +6,8 @@ import java.util.UUID;
  * 계약 {@code BodyAsset}.
  *
  * <p>본문이 {@code :::evidence key="..."} 로 가리키는 Asset 이다. 본문은 Markdown 원문으로 나가고 그 안에는 key 만 있는데
- * {@code /media/{assetId}} 는 UUID 로만 서빙하므로 — 주소가 추측 불가능한 것이 의도된 성질이다 — key 에서 주소를 만들 수 없다. 공개 화면이 key 를
+ * {@code /media/{assetId}} 는 UUID 로만 서빙하므로 — 주소가 추측 불가능한 것이 의도된 성질이다 — key 에서 주소를 만들 수 없다. 공개 화면이
- * 해석할 수 있도록 게시된 기록이 실제로 참조하는 Asset 을 함께 준다.
+ * key 를 해석할 수 있도록 게시된 기록이 실제로 참조하는 Asset 을 함께 준다.
  *
  * @param url 검증된 전송 경로다. object storage URL 이 아니다(설계 05장 §3.1).
  * @param decorative 장식용이면 대체 텍스트가 비어 있어도 된다. 게시 검증이 이 값으로 판정하므로 공개 화면도 같은 값을 보고 {@code alt} 를 정해야

src/application-core/src/main/java/dev/caskeleton/application/techlog/publicsite/model/PublishedDocumentView.java

@@ -9,17 +9,23 @@ import java.util.List;
  * <p>계약의 {@code CaseDetailResponse.case} 와 {@code ReferenceDetailResponse.reference} 는 담는 필드가
  * 다르지만(문제/결론 vs 범위/적용), 원천이 같은 {@code document} + 유형별 detail 이라 하나의 레코드로 읽고 웹 계층에서 유형별 모양으로 나눈다.
  *
+ * @param summary 문서가 스스로 밝히는 한 줄 요약. 제목 바로 아래에 온다 — 유형별 요약({@code primarySummary}: Case 는 문제,
+ *     Reference 는 범위)과 다르다. 이 자리가 없던 동안 화면은 유형별 요약을 대신 썼고, 그러면 머리말이 바로 아래의 "문제" 나 "이 기준을 쓰는 이유" 와
+ *     같은 글을 두 번 말했다.
  * @param content Markdown 원문이다. studio 의 렌더 블록이 아니다 — 공개 계약은 {@code contentFormat} 과 함께 원문을 준다.
  */
 public record PublishedDocumentView(
     String type,
     String canonicalPath,
     String title,
+    String summary,
     String primarySummary,
     String secondarySummary,
     List<String> environmentSummary,
     List<String> appliesTo,
     List<String> excludedScope,
+    List<ReferenceRuleView> rules,
+    List<String> examples,
     String freshnessStatus,
     String content,
     String contentFormat,
@@ -37,6 +43,8 @@ public record PublishedDocumentView(
     environmentSummary = environmentSummary == null ? List.of() : List.copyOf(environmentSummary);
     appliesTo = appliesTo == null ? List.of() : List.copyOf(appliesTo);
     excludedScope = excludedScope == null ? List.of() : List.copyOf(excludedScope);
+    rules = rules == null ? List.of() : List.copyOf(rules);
+    examples = examples == null ? List.of() : List.copyOf(examples);
     tags = tags == null ? List.of() : List.copyOf(tags);
     // Reference 에는 evidence 를 담는 본문이 없다. 빈 목록이 정상이며 없음과 구분하지 않는다.
     bodyAssets = bodyAssets == null ? List.of() : List.copyOf(bodyAssets);

src/application-core/src/main/java/dev/caskeleton/application/techlog/publicsite/model/PublishedProjectView.java

@@ -15,9 +15,11 @@ public record PublishedProjectView(
     String nextStep,
     String systemOverviewMarkdown,
     List<String> technologies,
+    List<TopicSummaryView> topics,
     Instant updatedAt) {
 
   public PublishedProjectView {
     technologies = technologies == null ? List.of() : List.copyOf(technologies);
+    topics = topics == null ? List.of() : List.copyOf(topics);
   }
 }

src/application-core/src/main/java/dev/caskeleton/application/techlog/publicsite/model/ReferenceRuleView.java

@@ -0,0 +1,8 @@
+package dev.caskeleton.application.techlog.publicsite.model;
+
+/**
+ * Reference 의 판단 기준 한 줄. 계약 {@code ReferenceDetailResponse.reference.rules[]}.
+ *
+ * <p>Reference 의 본문은 마크다운 한 덩어리가 아니라 제목이 붙은 규칙의 목록이다 — Studio 의 편집기가 그렇게 받고, 공개 화면도 그렇게 그린다.
+ */
+public record ReferenceRuleView(String title, String body) {}

src/build.gradle

@@ -455,6 +455,12 @@ configure(subprojects.findAll { it.childProjects.isEmpty() }) {
         useJUnitPlatform {
             excludeTags 'quarantine'
         }
+        // Gradle 기본값은 512m 이다. 이 스위트는 한 JVM 안에서 여러 Spring context 를 캐시하고
+        // (@SpringBootTest 슬라이스마다 하나) ArchUnit 이 전체 클래스 그래프를 들고 있으며
+        // Testcontainers 까지 함께 뜬다. 512m 에서는 그 조합이 OOM 으로 무너졌고, 증상은 테스트
+        // 실패가 아니라 "Gradle Test Executor 를 완료할 수 없음" — 어느 테스트 때문인지 알 수 없는
+        // 형태로 나타난다.
+        maxHeapSize = '2g'
     }
 
     // feature-ci-quality-gates-contract §4 (D7/D9) — flaky quarantine bucket. Runs ONLY

src/config/openapi/MANIFEST.sha256

@@ -1,6 +1,6 @@
-# source: tech-log-design-package contracts/openapi/studio-v1.yaml @ b20d7a2 (feature/response-envelope-adr-006)
+# source: tech-log-design-package contracts/openapi/studio-v1.yaml @ 0ffbc28 (master)
-6cae9924403d0761f401643a022980b8e04183eea0d890c143c9fbbbbc7431e4  studio-v1.yaml
+18dd46898be64b07f7e826409d19347512613ee2e22420028a4a0644f50f37dd  studio-v1.yaml
-# source: tech-log-design-package contracts/openapi/public-v1.yaml @ 55a9599 (feature/public-v1-response-envelope)
+# source: tech-log-design-package contracts/openapi/public-v1.yaml @ ef49d3a (master)
-8ac71425b38658f34641102b4c2e6e21288c811efebdb92c0a46fb9d4790e23e  public-v1.yaml
+7eb668e39e279e49767306dd36e1dd51302071c39d78495d21307bbd9676220e  public-v1.yaml
-# source: tech-log-design-package contracts/openapi/studio-management-v1.yaml @ 6ef5c1c (master)
+# source: tech-log-design-package contracts/openapi/studio-management-v1.yaml @ 0ffbc28 (master)
-ec5e432215fb041abee980787366a6db29ff1ecdd78416aa9c61e09b9b91022f  studio-management-v1.yaml
+72650735061fde627f5037571eb986cb758f44a546f065c88408399f8eec4a55  studio-management-v1.yaml

src/config/openapi/public-v1.yaml

@@ -1022,6 +1022,7 @@ components:
           enum:
           - CASE
           - REFERENCE
+          - QUESTION
           - PROJECT_ACTIVITY
           - RELEASE
         title:
@@ -1239,6 +1240,12 @@ components:
           properties:
             title:
               type: string
+            # 문서가 스스로 밝히는 한 줄 요약이다. 제목 바로 아래에 온다.
+            #
+            # 이 자리가 없어서 화면은 problemSummary / scopeSummary 를 대신 썼고, 그러면 머리말이
+            # 바로 아래의 "문제" 나 "이 기준을 쓰는 이유" 와 같은 글을 두 번 말한다.
+            summary:
+              type: string
             problemSummary:
               type: string
             conclusionSummary:
@@ -1325,6 +1332,12 @@ components:
           properties:
             title:
               type: string
+            # 문서가 스스로 밝히는 한 줄 요약이다. 제목 바로 아래에 온다.
+            #
+            # 이 자리가 없어서 화면은 problemSummary / scopeSummary 를 대신 썼고, 그러면 머리말이
+            # 바로 아래의 "문제" 나 "이 기준을 쓰는 이유" 와 같은 글을 두 번 말한다.
+            summary:
+              type: string
             scopeSummary:
               type: string
             appliesTo:
@@ -1335,6 +1348,23 @@ components:
               type: array
               items:
                 type: string
+            # Reference 의 본문은 `content` 마크다운이 아니라 이 두 칸에 있다. Studio 의 Reference
+            # 편집기는 규칙(제목+본문)과 예시를 따로 받고 body_markdown 은 비워 두므로, 이것을
+            # 내보내지 않으면 공개 화면에 판단 기준과 예시가 통째로 빠진다.
+            rules:
+              type: array
+              items:
+                type: object
+                required: [title, body]
+                properties:
+                  title:
+                    type: string
+                  body:
+                    type: string
+            examples:
+              type: array
+              items:
+                type: string
             freshnessStatus:
               type: string
               enum:
@@ -1572,6 +1602,13 @@ components:
               type: array
               items:
                 type: string
+            topics:
+              type: array
+              description: |-
+                이 프로젝트가 다루는 주제. 프로젝트 화면의 "주요 주제" 가 이 목록을 그린다.
+                화면은 처음부터 이 값을 읽고 있었지만 계약에 자리가 없어 늘 비어 있었다.
+              items:
+                $ref: '#/components/schemas/TopicSummary'
             updatedAt: *id003
         featuredDecision:
           $ref: '#/components/schemas/RelatedEntry'

src/config/openapi/studio-management-v1.yaml

@@ -3015,49 +3015,49 @@ paths:
           content:
             application/json:
               schema:
-                $ref: '#/components/schemas/PublishResponse'
+                $ref: '#/components/schemas/PublishResponseEnvelope'
         '400':
           description: Bad Request
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '401':
           description: Unauthorized
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '403':
           description: Forbidden
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '404':
           description: Not Found
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '409':
           description: Conflict
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '422':
           description: Unprocessable Content
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '500':
           description: Internal Server Error
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
       requestBody:
         required: true
         content:
@@ -3085,49 +3085,49 @@ paths:
           content:
             application/json:
               schema:
-                $ref: '#/components/schemas/ProjectEditResponse'
+                $ref: '#/components/schemas/ProjectEditResponseEnvelope'
         '400':
           description: Bad Request
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '401':
           description: Unauthorized
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '403':
           description: Forbidden
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '404':
           description: Not Found
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '409':
           description: Conflict
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '422':
           description: Unprocessable Content
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '500':
           description: Internal Server Error
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
       requestBody:
         required: true
         content:
@@ -4973,7 +4973,7 @@ paths:
               $ref: '#/components/schemas/ExpectedVersionRequest'
       security:
       - sessionCookie: []
-  /api/v1/studio/home-focus:
+  /api/v1/studio/home/focus:
     get:
       operationId: getHomeFocus
       tags:
@@ -4985,37 +4985,37 @@ paths:
           content:
             application/json:
               schema:
-                $ref: '#/components/schemas/HomeFocusResponse'
+                $ref: '#/components/schemas/HomeFocusResponseEnvelope'
         '400':
           description: Bad Request
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '401':
           description: Unauthorized
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '403':
           description: Forbidden
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '404':
           description: Not Found
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '500':
           description: Internal Server Error
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
       security:
       - sessionCookie: []
     put:
@@ -5030,49 +5030,49 @@ paths:
           content:
             application/json:
               schema:
-                $ref: '#/components/schemas/HomeFocusResponse'
+                $ref: '#/components/schemas/HomeFocusResponseEnvelope'
         '400':
           description: Bad Request
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '401':
           description: Unauthorized
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '403':
           description: Forbidden
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '404':
           description: Not Found
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '409':
           description: Conflict
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '422':
           description: Unprocessable Content
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '500':
           description: Internal Server Error
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
       requestBody:
         required: true
         content:
@@ -5101,33 +5101,31 @@ paths:
           content:
             application/json:
               schema:
-                type: array
+                $ref: '#/components/schemas/ProjectActivityListEnvelope'
-                items:
-                  $ref: '#/components/schemas/ProjectActivityResponse'
         '401':
           description: '401'
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '403':
           description: '403'
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '404':
           description: '404'
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '500':
           description: '500'
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
     post:
       operationId: createProjectActivity
       tags:
@@ -5154,49 +5152,49 @@ paths:
           content:
             application/json:
               schema:
-                $ref: '#/components/schemas/ProjectActivityResponse'
+                $ref: '#/components/schemas/ProjectActivityResponseEnvelope'
         '400':
           description: '400'
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '401':
           description: '401'
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '403':
           description: '403'
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '404':
           description: '404'
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '409':
           description: '409'
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '422':
           description: '422'
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '500':
           description: '500'
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
   /api/v1/studio/projects/{id}/activities/{activityId}:
     put:
       operationId: updateProjectActivity
@@ -5230,49 +5228,126 @@ paths:
           content:
             application/json:
               schema:
-                $ref: '#/components/schemas/ProjectActivityResponse'
+                $ref: '#/components/schemas/ProjectActivityResponseEnvelope'
         '400':
           description: '400'
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '401':
           description: '401'
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '403':
           description: '403'
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '404':
           description: '404'
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '409':
           description: '409'
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '422':
           description: '422'
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
         '500':
           description: '500'
           content:
-            application/problem+json:
+            application/json:
               schema:
-                $ref: '#/components/schemas/ProblemDetails'
+                $ref: '#/components/schemas/ErrorEnvelope'
+    delete:
+      operationId: deleteProjectActivity
+      tags:
+      - Projects
+      description: |-
+        프로젝트 활동 한 줄을 지운다. 계약에는 만들기와 고치기만 있었고 지우기가 없어서, 잘못
+        적은 줄이 공개 타임라인에 영구히 남았다.
+
+        `AUTO` 로 기록된 줄은 게시 같은 실제 사건의 흔적이므로 지우지 않는다 — 지우면 무슨 일이
+        있었는지가 사라진다. 손으로 적은 `MANUAL` 줄만 지울 수 있다.
+      parameters:
+      - name: id
+        in: path
+        required: true
+        schema:
+          type: string
+          format: uuid
+      - name: activityId
+        in: path
+        required: true
+        schema:
+          type: string
+          format: uuid
+      - $ref: '#/components/parameters/CsrfToken'
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/ExpectedVersionRequest'
+      responses:
+        '204':
+          description: No Content
+        '400':
+          description: Bad Request
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorEnvelope'
+        '401':
+          description: Unauthorized
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorEnvelope'
+        '403':
+          description: Forbidden
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorEnvelope'
+        '404':
+          description: Not Found
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorEnvelope'
+        '409':
+          description: Conflict
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorEnvelope'
+        '422':
+          description: Unprocessable Content
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorEnvelope'
+        '500':
+          description: Internal Server Error
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorEnvelope'
+      security:
+      - sessionCookie: []
 components:
   securitySchemes:
     sessionCookie:
@@ -5510,6 +5585,53 @@ components:
           $ref: '#/components/schemas/ReleaseEditResponse'
         meta:
           $ref: '#/components/schemas/ResponseMeta'
+    HomeFocusResponseEnvelope:
+      type: object
+      additionalProperties: false
+      required:
+      - success
+      - data
+      - meta
+      properties:
+        success:
+          type: boolean
+          const: true
+        data:
+          $ref: '#/components/schemas/HomeFocusResponse'
+        meta:
+          $ref: '#/components/schemas/ResponseMeta'
+    ProjectActivityResponseEnvelope:
+      type: object
+      additionalProperties: false
+      required:
+      - success
+      - data
+      - meta
+      properties:
+        success:
+          type: boolean
+          const: true
+        data:
+          $ref: '#/components/schemas/ProjectActivityResponse'
+        meta:
+          $ref: '#/components/schemas/ResponseMeta'
+    ProjectActivityListEnvelope:
+      type: object
+      additionalProperties: false
+      required:
+      - success
+      - data
+      - meta
+      properties:
+        success:
+          type: boolean
+          const: true
+        data:
+          type: array
+          items:
+            $ref: '#/components/schemas/ProjectActivityResponse'
+        meta:
+          $ref: '#/components/schemas/ResponseMeta'
     PublishResponseEnvelope:
       type: object
       additionalProperties: false

src/config/openapi/studio-v1.yaml

@@ -1,7 +1,7 @@
 openapi: 3.1.0
 info:
   title: Tech Log Studio API
-  version: 3.0.0
+  version: 3.1.0
   description: |
     Tech Log Studio orchestration 계약이다.
 
@@ -1321,7 +1321,10 @@ components:
       properties:
         type: { type: string, enum: [HEADING] }
         id: { type: string, minLength: 1, maxLength: 200 }
-        level: { type: integer, minimum: 2, maximum: 4 }
+        # 작성자가 쓴 그대로 담는다. 서버 렌더러는 이 값을 2..4 로 좁혀 문서 안 제목 위계를
+        # 지키므로(BlockRenderer), 계약이 1..6 을 거절할 이유가 없다 — 거절하면 `#` 로 시작한
+        # 평범한 Markdown 이 통째로 렌더링되지 않는다.
+        level: { type: integer, minimum: 1, maximum: 6 }
         content: { type: array, maxItems: 1000, items: { $ref: "#/components/schemas/Inline" } }
     ParagraphBlock:
       type: object
@@ -1452,6 +1455,29 @@ components:
         width: { type: [integer, "null"], minimum: 1 }
         height: { type: [integer, "null"], minimum: 1 }
         decorative: { type: boolean }
+    ThematicBreakBlock:
+      type: object
+      additionalProperties: false
+      description: |
+        `---` 로 쓴 구분선이다. 담을 내용이 없으므로 `type` 뿐이다.
+      required: [type]
+      properties:
+        type: { type: string, enum: [THEMATIC_BREAK] }
+    ImageBlock:
+      type: object
+      additionalProperties: false
+      description: |
+        `![alt](/media/...)` 로 쓴 그림이다.
+
+        `EvidenceFigureBlock` 과 나누는 기준은 출처다. evidence 는 assetKey 로 가리켜 게시
+        시점에 고정되고 확대 보기를 갖지만, 이쪽은 작성자가 적은 경로를 그대로 쓴다. 경로 규칙은
+        링크와 같다 — 외부 스킴과 `javascript:` 는 거절한다.
+      required: [type, src, alt, title]
+      properties:
+        type: { type: string, enum: [IMAGE] }
+        src: { type: string, minLength: 1, maxLength: 500 }
+        alt: { type: string, maxLength: 300 }
+        title: { type: [string, "null"], maxLength: 300 }
     CaseRenderBlock:
       oneOf:
         - { $ref: "#/components/schemas/HeadingBlock" }
@@ -1463,6 +1489,8 @@ components:
         - { $ref: "#/components/schemas/DataTableBlock" }
         - { $ref: "#/components/schemas/CalloutBlock" }
         - { $ref: "#/components/schemas/EvidenceFigureBlock" }
+        - { $ref: "#/components/schemas/ThematicBreakBlock" }
+        - { $ref: "#/components/schemas/ImageBlock" }
       discriminator:
         propertyName: type
         mapping:
@@ -1475,6 +1503,8 @@ components:
           DATA_TABLE: "#/components/schemas/DataTableBlock"
           CALLOUT: "#/components/schemas/CalloutBlock"
           EVIDENCE_FIGURE: "#/components/schemas/EvidenceFigureBlock"
+          THEMATIC_BREAK: "#/components/schemas/ThematicBreakBlock"
+          IMAGE: "#/components/schemas/ImageBlock"
     CasePublicRenderModel:
       unevaluatedProperties: false
       allOf:
@@ -1542,7 +1572,10 @@ components:
           properties:
             kind: { type: string, enum: [PROJECT_DECISION] }
             status: { type: string, enum: [PROPOSED, ADOPTED] }
-            decidedOn: { type: string, format: date }
+            # 결정일은 비어 있을 수 있다. 검증은 이것을 경고로만 다루므로(DECIDED_ON_REQUIRED)
+            # 날짜 없이 게시할 수 있는데, 렌더 모델이 필수로 요구하면 그 문서는 미리보기조차
+            # 열리지 않는다 — 두 규칙이 어긋나면 작성자는 "경고라며 왜 안 되냐"를 만난다.
+            decidedOn: { type: [string, "null"], format: date }
             statement: { type: string, maxLength: 100000 }
             rationale: { type: string, maxLength: 100000 }
             consequences: { type: array, maxItems: 50, items: { $ref: "#/components/schemas/OrderedText" } }