merge: feature/studio-response-envelope — Studio 응답 봉투를 전송 경계에서 언랩

계약 v3.0.0(ADR-006)에 맞춰 재생성하고, envelopeData/envelopeError가
{success,data,meta}를 언랩한다. 앱·도메인 계층과 StudioGateway 포트는 무변경 —
언랩이 전송 경계에서 끝난다.

검증: check:tech-log-contract / test:tech-log 337건 / tsc --noEmit 전부 통과

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

src/features/tech-log/adapters/http/asset-upload-transport.ts

@@ -1,11 +1,21 @@
 import { StudioGatewayError } from "../../application/ports/studio-gateway-error.ts";
 import type { UploadAssetForm } from "../../application/ports/studio-asset-gateway.ts";
 import type { Asset, ProblemDetails } from "../../contracts/studio/contract.ts";
+import { envelopeData, envelopeError } from "../../contracts/tech-log-studio-contract-contribution.ts";
 import type { StudioAssetUploadTransport } from "./http-studio-asset-gateway.ts";
 import { STUDIO_ERROR_CODES } from "./studio-error-mapping.ts";
 
 const CODES = new Set<string>(STUDIO_ERROR_CODES);
 
+/**
+ * canonical `uploadStudioAsset`도 다른 18개 operation과 같은 봉투(ADR-006)를
+ * 쓴다 — 이 seam만 일반 계약 런타임을 안 거칠 뿐이지 wire format은 같다.
+ * 그래서 `tech-log-studio-contract-contribution.ts`의 언랩 validator를 그대로
+ * 재사용한다: 봉투 뼈대 검증 로직이 두 곳에서 따로 드리프트하는 것을 막는다.
+ */
+const UPLOAD_DATA = envelopeData<Asset>("uploadStudioAssetOutput");
+const UPLOAD_PROBLEM = envelopeError();
+
 /**
  * The contract runtime can only express `requestBody: "NONE" | "JSON"` and the
  * low-level client always serializes the body as JSON (see
@@ -81,8 +91,9 @@ export function createAssetUploadTransport(
       }
 
       if (response.status === 201 || response.status === 200) {
+        let body: unknown;
         try {
-          return (await response.json()) as Asset;
+          body = await response.json();
         } catch {
           // M1 (fix round 1). This port's contract is `StudioGatewayError`;
           // a malformed success body must not throw a raw `SyntaxError` out
@@ -91,16 +102,33 @@ export function createAssetUploadTransport(
             `Upload returned status ${response.status} with a body that could not be parsed as JSON.`,
           );
         }
+        const parsed = UPLOAD_DATA.safeParse(body);
+        if (!parsed.success) {
+          // 봉투 뼈대(`{success:true, data, meta}`)가 아니다 — payload는
+          // 통과시키되 봉투 자체는 반드시 검증한다(다른 18개 operation과 동일
+          // 원칙, ADR-006).
+          throw unavailable(
+            `Upload returned status ${response.status} with a body that did not match the response envelope.`,
+          );
+        }
+        return parsed.data;
       }
 
-      let problem: ProblemDetails | null;
+      let problemBody: unknown = null;
       try {
-        problem = (await response.json()) as ProblemDetails;
+        problemBody = await response.json();
       } catch {
-        problem = null;
+        problemBody = null;
       }
-      if (problem && typeof problem.code === "string" && CODES.has(problem.code)) {
-        throw new StudioGatewayError(problem);
+      const parsedProblem = problemBody === null ? null : UPLOAD_PROBLEM.safeParse(problemBody);
+      if (parsedProblem && parsedProblem.success && CODES.has(parsedProblem.data.code)) {
+        // `studio-error-mapping.ts`의 PROBLEM 분기와 같은 캐스트: 봉투는 이미
+        // `code`를 `apiErrorSchema`의 enum으로 검증했으므로(`CODES.has` 확인도
+        // 통과) `ProblemDetails["code"]`로 좁혀도 안전하다. envelope에는 HTTP
+        // status가 없다 (`envelopeError`가 0으로 둔다) — 이 seam은 실제 status를
+        // 이미 들고 있으므로 바로 덮는다.
+        const problem = parsedProblem.data as unknown as ProblemDetails;
+        throw new StudioGatewayError({ ...problem, status: response.status });
       }
       // Fix round 2, item 2. The real status is passed through (not the
       // hardcoded 503 default) so `http-studio-asset-gateway.ts`'s

src/features/tech-log/adapters/http/studio-error-mapping.ts

@@ -9,7 +9,7 @@ export const STUDIO_ERROR_CODES = Object.freeze([
   "DOCUMENT_NOT_FOUND",
   "VERSION_CONFLICT",
   "REQUEST_VALIDATION_FAILED",
-  "VALIDATION_FAILED",
+  "DOCUMENT_VALIDATION_FAILED",
   "VALIDATION_STALE",
   "PREVIEW_NOT_FOUND",
   "PREVIEW_STALE",
@@ -57,13 +57,20 @@ export function toStudioGatewayError(
 ): StudioGatewayError {
   switch (outcome.kind) {
     case "PROBLEM": {
-      const problem = outcome.problem as ProblemDetails;
+      // 봉투 오류는 wire에 HTTP status를 싣지 않는다 (`envelopeError`가 `status`를
+      // 0으로 둔다) — 실제 status는 전송 계층이 `outcome.metadata.status`로
+      // 이미 들고 있으므로 여기서 덮는다. `SafeResponseMetadata.status`는
+      // `PROBLEM` outcome에서 필수 필드다 (`http-execution-v3.ts`).
+      // `problem`이 falsy이거나 status가 0(봉투의 sentinel)이면 metadata로
+      // 덮는다 — 원래 코드처럼 `problem`을 안전하지 않게 역참조하지 않는다.
+      const problem = outcome.problem as ProblemDetails | undefined;
+      const status = problem?.status || outcome.metadata.status;
       if (problem && typeof problem.code === "string" && CODES.has(problem.code)) {
-        return new StudioGatewayError(problem);
+        return new StudioGatewayError({ ...problem, status });
       }
       return synthetic(
         "STUDIO_UNAVAILABLE",
-        outcome.metadata.status,
+        status,
         `${operationId} returned an uncontracted problem code.`,
         false,
       );

src/features/tech-log/adapters/mock/cursor.ts

@@ -9,7 +9,9 @@ function invalid(detail: string) {
   const problem: ProblemDetails = {
     type: "https://techlog.local/problems/request-validation-failed", title: "Request validation failed",
     status: 422, detail, code: "REQUEST_VALIDATION_FAILED", retryable: false,
-    fieldErrors: [{ path: "/cursor", message: detail }],
+    // wire와 같은 자리: `details`가 `ValidationErrorDetails` 모양이다 (Task 3
+    // fix round 1 — 예전엔 `fieldErrors`가 최상위 필드였다).
+    details: { fieldErrors: [{ path: "/cursor", message: detail }] },
   };
   return new StudioGatewayError(problem);
 }

src/features/tech-log/adapters/mock/mock-studio-gateway.ts

@@ -60,7 +60,11 @@ function gatewayProblem(status: number, code: ProblemDetails["code"], detail: st
 }
 
 function requestError(fieldErrors: components["schemas"]["FieldError"][]) {
-  return gatewayProblem(422, "REQUEST_VALIDATION_FAILED", "Request fields are invalid.", { fieldErrors });
+  // wire와 같은 자리: `details`가 `ValidationErrorDetails` 모양이다 (Task 3
+  // fix round 1 — 예전엔 `fieldErrors`가 최상위 필드였다).
+  return gatewayProblem(422, "REQUEST_VALIDATION_FAILED", "Request fields are invalid.", {
+    details: { fieldErrors },
+  });
 }
 
 function inputOf(document: WorkingCopy): WorkingCopyInput {
@@ -169,7 +173,7 @@ export function createMockStudioGateway(supplied: Partial<MockStudioDependencies
     const nextAction = deriveDocumentState({ document: base.document, validation: base.currentValidation, preview: base.latestPreview, publication: base.currentPublication, dependencyRevision: base.dependencyRevision, now: dependencies.clock.now() }).nextAction;
     return { ...base, nextAction };
   };
-  const version = (value: WorkingCopy, expected: number) => { if (value.version !== expected) throw gatewayProblem(409, "VERSION_CONFLICT", `Expected ${expected}; current ${value.version}.`, { latestDocument: clone(detail(value.id)), conflictingFields: [] }); };
+  const version = (value: WorkingCopy, expected: number) => { if (value.version !== expected) throw gatewayProblem(409, "VERSION_CONFLICT", `Expected ${expected}; current ${value.version}.`, { details: { latestDocument: clone(detail(value.id)), conflictingFields: [] } }); };
   const structure = (input: WorkingCopyInput) => { const errors = validateWorkingCopyInputStructure(input); if (errors.length) throw requestError(errors); };
   const materialize = (id: string, value: number, input: WorkingCopyInput): WorkingCopy => ({ ...clone(input), id, version: value, updatedAt: dependencies.clock.now().toISOString(), relations: input.relations.map((relation) => ({ ...relation, id: relation.id ?? dependencies.idGenerator.next(), targetId: relation.targetId! })) }) as WorkingCopy;
   const summary = (value: WorkingCopy): components["schemas"]["DocumentSummary"] => {
@@ -197,7 +201,7 @@ export function createMockStudioGateway(supplied: Partial<MockStudioDependencies
     getDocument(documentId, options) { return read(options, () => { uuid(documentId, "/documentId"); return detail(documentId); }); },
     saveDocument(documentId, command, options) { return idempotent("save", documentId, () => command, options, () => {
       uuid(documentId, "/documentId"); structure(command.document); const current = document(documentId); version(current, command.expectedVersion);
-      if (state.pendingConflicts.delete(documentId)) { const latest = materialize(documentId, current.version + 1, { ...inputOf(current), title: "서버에서 먼저 수정된 제목", summary: "서버 최신 요약" }); state.documents.set(documentId, latest); state.validations.delete(documentId); throw gatewayProblem(409, "VERSION_CONFLICT", "The server document changed.", { latestDocument: clone(detail(documentId)), conflictingFields: ["/title", "/summary"] }); }
+      if (state.pendingConflicts.delete(documentId)) { const latest = materialize(documentId, current.version + 1, { ...inputOf(current), title: "서버에서 먼저 수정된 제목", summary: "서버 최신 요약" }); state.documents.set(documentId, latest); state.validations.delete(documentId); throw gatewayProblem(409, "VERSION_CONFLICT", "The server document changed.", { details: { latestDocument: clone(detail(documentId)), conflictingFields: ["/title", "/summary"] } }); }
       const saved = materialize(documentId, current.version + 1, command.document); state.documents.set(documentId, saved); state.validations.delete(documentId); return detail(documentId);
     }); },
     validateDocument(documentId, command, options) { return idempotent("validate", documentId, () => command, options, () => { uuid(documentId, "/documentId"); const value = document(documentId); version(value, command.expectedVersion); const report = validateWorkingCopy(value, { now: dependencies.clock.now(), validationId: dependencies.idGenerator.next(), dependencyRevision: dependencies.dependencyRevision.current(), catalog: state.catalog, documents: [...state.documents.values()], assets: [...dependencies.assets.values()] }); state.validations.set(documentId, report); return report; }); },
@@ -215,7 +219,7 @@ export function createMockStudioGateway(supplied: Partial<MockStudioDependencies
       const warnings = validation.issues.filter((issue) => issue.severity === "WARNING").map((issue) => issue.code); if (!exactSet(warnings, command.acknowledgedWarningCodes)) throw requestError([{ path: "/acknowledgedWarningCodes", message: "Acknowledge all current warnings." }]);
       const eventId = dependencies.idGenerator.next(); const publicationId = existing?.publicationId ?? dependencies.idGenerator.next(); const event: PublicationEvent = { publicationEventId: eventId, publicationId, documentId, type: existing ? "REPUBLISHED" : "PUBLISHED", occurredAt: now.toISOString(), publishedVersion: value.version, sourcePublishedEventId: null, snapshotAvailable: true }; const publication: PublicationAggregate = { publicationId, documentId, status: "PUBLISHED", publishedVersion: value.version, publicationRevision: (existing?.publicationRevision ?? 0) + 1, latestEventId: eventId, publicPath: preview.renderModel.publicPath, updatedAt: now.toISOString() }; state.events.set(eventId, event); state.publications.set(documentId, publication); state.snapshots.set(eventId, { event: clone(event), renderModel: clone(preview.renderModel), contentFormatVersion: CONTENT_FORMAT_VERSION, rendererContractVersion: RENDERER_CONTRACT_VERSION }); return { publication, event } satisfies PublishResult;
     }); },
-    unpublishPublication(publicationId, command, options) { return idempotent("unpublish", publicationId, () => command, options, () => { uuid(publicationId, "/publicationId"); const current = [...state.publications.values()].find((item) => item.publicationId === publicationId); if (!current) throw gatewayProblem(404, "PUBLICATION_NOT_FOUND", "Publication not found."); if (current.publicationRevision !== command.expectedPublicationRevision) throw gatewayProblem(409, "PUBLICATION_CONFLICT", "Publication revision changed.", { latestPublication: clone(current) }); if (current.status === "UNPUBLISHED") return { publication: current, event: state.events.get(current.latestEventId)! }; const event: PublicationEvent = { publicationEventId: dependencies.idGenerator.next(), publicationId, documentId: current.documentId, type: "UNPUBLISHED", occurredAt: dependencies.clock.now().toISOString(), publishedVersion: current.publishedVersion, sourcePublishedEventId: current.latestEventId, snapshotAvailable: false }; const publication: PublicationAggregate = { ...current, status: "UNPUBLISHED", publicationRevision: current.publicationRevision + 1, latestEventId: event.publicationEventId, updatedAt: event.occurredAt }; state.events.set(event.publicationEventId, event); state.publications.set(current.documentId, publication); return { publication, event }; }); },
+    unpublishPublication(publicationId, command, options) { return idempotent("unpublish", publicationId, () => command, options, () => { uuid(publicationId, "/publicationId"); const current = [...state.publications.values()].find((item) => item.publicationId === publicationId); if (!current) throw gatewayProblem(404, "PUBLICATION_NOT_FOUND", "Publication not found."); if (current.publicationRevision !== command.expectedPublicationRevision) throw gatewayProblem(409, "PUBLICATION_CONFLICT", "Publication revision changed.", { details: { latestPublication: clone(current) } }); if (current.status === "UNPUBLISHED") return { publication: current, event: state.events.get(current.latestEventId)! }; const event: PublicationEvent = { publicationEventId: dependencies.idGenerator.next(), publicationId, documentId: current.documentId, type: "UNPUBLISHED", occurredAt: dependencies.clock.now().toISOString(), publishedVersion: current.publishedVersion, sourcePublishedEventId: current.latestEventId, snapshotAvailable: false }; const publication: PublicationAggregate = { ...current, status: "UNPUBLISHED", publicationRevision: current.publicationRevision + 1, latestEventId: event.publicationEventId, updatedAt: event.occurredAt }; state.events.set(event.publicationEventId, event); state.publications.set(current.documentId, publication); return { publication, event }; }); },
     listPublications(query, options) { return read(options, () => { queryText(query.q); const limit = limitOf(query.limit); const normalized = { q: normalizeQ(query.q), type: query.type ?? null, sort: "OCCURRED_DESC" }; const binding = cursorBinding(normalized); const cursor = query.cursor ? decodeCursor(query.cursor, binding) : null; const all = [...state.events.values()].filter((event) => (!normalized.type || event.type === normalized.type) && (!normalized.q || `${document(event.documentId).title} ${document(event.documentId).summary}`.toLocaleLowerCase("ko-KR").includes(normalized.q))).sort((a, b) => b.occurredAt.localeCompare(a.occurredAt) || a.publicationEventId.localeCompare(b.publicationEventId)); const source = cursor ? all.filter((event) => event.occurredAt < cursor.lastValue || (event.occurredAt === cursor.lastValue && event.publicationEventId > cursor.lastId)) : all; const selected = source.slice(0, limit); const last = selected.at(-1); return { items: selected.map(publicationRow), nextCursor: selected.length < source.length && last ? encodeCursor({ binding, lastValue: last.occurredAt, lastId: last.publicationEventId }) : null } satisfies PublicationPage; }); },
     getPublicationSnapshot(publicationEventId, options) { return read(options, () => { uuid(publicationEventId, "/publicationEventId"); if (!state.events.has(publicationEventId)) throw gatewayProblem(404, "PUBLICATION_EVENT_NOT_FOUND", "Publication event not found."); const snapshot = state.snapshots.get(publicationEventId); if (!snapshot) throw gatewayProblem(404, "PUBLICATION_SNAPSHOT_NOT_FOUND", "Publication snapshot not found."); return snapshot; }); },
     getCatalog(query, options) { return read(options, () => { if (!query.type) throw requestError([{ path: "/type", message: "type is required." }]); queryText(query.q); const limit = limitOf(query.limit); const normalized = { type: query.type, q: normalizeQ(query.q), sort: "LABEL_ASC" }; const binding = cursorBinding(normalized); const cursor = query.cursor ? decodeCursor(query.cursor, binding) : null; const all = state.catalog.filter((item) => item.type === query.type && (!normalized.q || item.label.toLocaleLowerCase("ko-KR").includes(normalized.q))).sort((a, b) => a.label.localeCompare(b.label, "ko") || a.id.localeCompare(b.id)); const source = cursor ? all.filter((item) => item.label.localeCompare(cursor.lastValue, "ko") > 0 || (item.label === cursor.lastValue && item.id > cursor.lastId)) : all; const selected = source.slice(0, limit); const last = selected.at(-1); return { items: selected, nextCursor: selected.length < source.length && last ? encodeCursor({ binding, lastValue: last.label, lastId: last.id }) : null } satisfies CatalogPage; }); },

src/features/tech-log/contracts/studio/canonical-source.json

@@ -1,8 +1,8 @@
 {
   "packageId": "@tech-log/studio-contract",
-  "version": "2.0.0",
-  "digest": "sha256:99f54f56ea0c582eafdbdf9be5653e3384bef0a1b08bff67f3147ee0292019ea",
-  "sourceRevision": "ce2e748",
+  "version": "3.0.0",
+  "digest": "sha256:6cae9924403d0761f401643a022980b8e04183eea0d890c143c9fbbbbc7431e4",
+  "sourceRevision": "b20d7a2",
   "operationIds": [
     "getStudioSession",
     "getStudioDashboard",

src/features/tech-log/contracts/studio/contract.ts

@@ -23,7 +23,48 @@ export type PublicationListItem = Schemas["PublicationListItem"];
 export type PublicationPage = Schemas["PublicationPage"];
 export type PublicationSnapshot = Schemas["PublicationSnapshot"];
 export type CatalogPage = Schemas["CatalogPage"];
-export type ProblemDetails = Schemas["ProblemDetails"];
+/**
+ * ADR-006으로 canonical 계약의 오류가 봉투(`ErrorEnvelope`/`ApiError`)로
+ * 바뀌면서 `ProblemDetails` 스키마 자체는 canonical에서 삭제됐다. 더 이상
+ * 생성된 스키마에서 뽑지 않고 여기서 손으로 유지하되, 이 모양은 전송 경계
+ * (`tech-log-studio-contract-contribution.ts`의 `envelopeError`)가 실제로
+ * 만드는 모양과 **동일해야 한다** — 그게 이 값이 production에서 채워지는
+ * 유일한 경로다. `ApiError`가 옮겨주는 필드(`type/title/status/detail/code/
+ * category/retryable/details`)만 갖는다.
+ *
+ * (Task 3 fix round 1) 이전에는 ADR-006 이전 평면 wire 모양에서 넘어온
+ * `instance`/`traceId`/`fieldErrors`/`latestDocument`/`latestPublication`/
+ * `conflictingFields`를 최상위 필드로 따로 두고 있었다. `envelopeError`는
+ * 그 필드들을 채우지 않으므로(옮길 대상이 없음) production 값에서는 항상
+ * `undefined`였고, mock 게이트웨이만 채웠다 — 타입은 있는데 mock에 대고
+ * 짜면 통과하고 실제 HTTP 경로에서는 조용히 비는, 봉투 검증 설계가 막으려던
+ * 함정이었다. 그 데이터는 이제 wire와 동일하게 `details` 안에 둔다 — mock도
+ * 여기 채운다(`mock-studio-gateway.ts`, `cursor.ts`).
+ */
+export type ValidationErrorDetails = Schemas["ValidationErrorDetails"];
+export type VersionConflictDetails = Schemas["VersionConflictDetails"];
+export type PublicationConflictDetails = Schemas["PublicationConflictDetails"];
+export type ProblemDetailsPayload =
+  | ValidationErrorDetails
+  | VersionConflictDetails
+  | PublicationConflictDetails
+  | null;
+
+export type ProblemDetails = Readonly<{
+  /** Format: uri-reference */
+  type: string;
+  title: string;
+  status: number;
+  detail: string;
+  code: Schemas["ApiError"]["code"];
+  category?: Schemas["ApiError"]["category"];
+  // optional 유지: 기존 호출부(테스트의 `new StudioGatewayError({...})` 리터럴
+  // 다수, `synthetic()`의 일부 경로)가 `retryable`을 생략한다. 이번 fix
+  // round의 finding은 `details`/평면 필드 문제이지 이 필드의 필수 여부가
+  // 아니다 — required로 좁히면 무관한 파일들이 깨진다.
+  retryable?: boolean;
+  details?: ProblemDetailsPayload;
+}>;
 export type PublicRenderModel = Schemas["PublicRenderModel"];
 export type Asset = Schemas["Asset"];
 export type AssetDetail = Schemas["AssetDetail"];

src/features/tech-log/contracts/studio/generated.ts

@@ -89,8 +89,8 @@ export interface paths {
          * @description 편집 가능한 content field만 저장한다. lifecycle 전이는 명시적인 Domain
          *     Action이 담당한다. 저장은 Public Projection을 변경하지 않는다.
          *
-         *     `expectedVersion` 불일치는 `VERSION_CONFLICT`이며 응답 `ProblemDetails`의
-         *     `latestDocument`로 현재 상태를 함께 제공한다.
+         *     `expectedVersion` 불일치는 `VERSION_CONFLICT`이며 응답 `error.details`
+         *     (`VersionConflictDetails`)의 `latestDocument`로 현재 상태를 함께 제공한다.
          *
          */
         put: operations["saveStudioDocument"];
@@ -382,6 +382,130 @@ export interface paths {
 export type webhooks = Record<string, never>;
 export interface components {
     schemas: {
+        ResponseMeta: {
+            requestId: string;
+            traceId: string;
+            correlationId?: string | null;
+            /** @description Studio는 body 안 cursor 페이지네이션을 쓰므로 항상 null이다. 백엔드 템플릿의 ResponseMeta record가 이 필드를 직렬화한다. */
+            page?: {
+                [key: string]: unknown;
+            } | null;
+        };
+        ApiError: {
+            /** @enum {string} */
+            code: "AUTHENTICATION_REQUIRED" | "STUDIO_ACCESS_DENIED" | "DOCUMENT_NOT_FOUND" | "VERSION_CONFLICT" | "REQUEST_VALIDATION_FAILED" | "DOCUMENT_VALIDATION_FAILED" | "VALIDATION_STALE" | "PREVIEW_NOT_FOUND" | "PREVIEW_STALE" | "PREVIEW_EXPIRED" | "PUBLICATION_NOT_FOUND" | "PUBLICATION_CONFLICT" | "PUBLICATION_EVENT_NOT_FOUND" | "PUBLICATION_SNAPSHOT_NOT_FOUND" | "WARNING_ACKNOWLEDGEMENT_REQUIRED" | "IDEMPOTENCY_KEY_REUSED" | "ASSET_NOT_FOUND" | "ASSET_NOT_READY" | "ASSET_IN_USE" | "ASSET_QUARANTINED" | "PAYLOAD_TOO_LARGE" | "UNSUPPORTED_MEDIA_TYPE" | "STUDIO_UNAVAILABLE";
+            /** @enum {string} */
+            category: "VALIDATION" | "AUTH" | "AUTHZ" | "NOT_FOUND" | "CONFLICT" | "RATE_LIMIT" | "TRANSIENT_DEPENDENCY" | "PERMANENT_DEPENDENCY" | "DATA_INTEGRITY" | "INTERNAL";
+            message: string;
+            retryable: boolean;
+            details?: components["schemas"]["ValidationErrorDetails"] | components["schemas"]["VersionConflictDetails"] | components["schemas"]["PublicationConflictDetails"] | null;
+        };
+        ErrorEnvelope: {
+            /** @constant */
+            success: false;
+            error: components["schemas"]["ApiError"];
+            meta: components["schemas"]["ResponseMeta"];
+        };
+        ValidationErrorDetails: {
+            fieldErrors: components["schemas"]["FieldError"][];
+        };
+        VersionConflictDetails: {
+            latestDocument: components["schemas"]["WorkingCopyDetail"];
+            conflictingFields?: string[];
+        };
+        PublicationConflictDetails: {
+            latestPublication: components["schemas"]["PublicationAggregate"];
+        };
+        StudioSessionEnvelope: {
+            /** @constant */
+            success: true;
+            data: components["schemas"]["StudioSession"];
+            meta: components["schemas"]["ResponseMeta"];
+        };
+        StudioDashboardEnvelope: {
+            /** @constant */
+            success: true;
+            data: components["schemas"]["StudioDashboard"];
+            meta: components["schemas"]["ResponseMeta"];
+        };
+        DocumentPageEnvelope: {
+            /** @constant */
+            success: true;
+            data: components["schemas"]["DocumentPage"];
+            meta: components["schemas"]["ResponseMeta"];
+        };
+        WorkingCopyDetailEnvelope: {
+            /** @constant */
+            success: true;
+            data: components["schemas"]["WorkingCopyDetail"];
+            meta: components["schemas"]["ResponseMeta"];
+        };
+        WorkingCopyEnvelope: {
+            /** @constant */
+            success: true;
+            data: components["schemas"]["WorkingCopy"];
+            meta: components["schemas"]["ResponseMeta"];
+        };
+        ValidationReportEnvelope: {
+            /** @constant */
+            success: true;
+            data: components["schemas"]["ValidationReport"];
+            meta: components["schemas"]["ResponseMeta"];
+        };
+        PreviewDetailEnvelope: {
+            /** @constant */
+            success: true;
+            data: components["schemas"]["PreviewDetail"];
+            meta: components["schemas"]["ResponseMeta"];
+        };
+        PublicPreviewEnvelope: {
+            /** @constant */
+            success: true;
+            data: components["schemas"]["PublicPreview"];
+            meta: components["schemas"]["ResponseMeta"];
+        };
+        PublishResultEnvelope: {
+            /** @constant */
+            success: true;
+            data: components["schemas"]["PublishResult"];
+            meta: components["schemas"]["ResponseMeta"];
+        };
+        PublicationPageEnvelope: {
+            /** @constant */
+            success: true;
+            data: components["schemas"]["PublicationPage"];
+            meta: components["schemas"]["ResponseMeta"];
+        };
+        PublicationSnapshotEnvelope: {
+            /** @constant */
+            success: true;
+            data: components["schemas"]["PublicationSnapshot"];
+            meta: components["schemas"]["ResponseMeta"];
+        };
+        CatalogPageEnvelope: {
+            /** @constant */
+            success: true;
+            data: components["schemas"]["CatalogPage"];
+            meta: components["schemas"]["ResponseMeta"];
+        };
+        AssetPageEnvelope: {
+            /** @constant */
+            success: true;
+            data: components["schemas"]["AssetPage"];
+            meta: components["schemas"]["ResponseMeta"];
+        };
+        AssetDetailEnvelope: {
+            /** @constant */
+            success: true;
+            data: components["schemas"]["AssetDetail"];
+            meta: components["schemas"]["ResponseMeta"];
+        };
+        AssetEnvelope: {
+            /** @constant */
+            success: true;
+            data: components["schemas"]["Asset"];
+            meta: components["schemas"]["ResponseMeta"];
+        };
         StudioSession: {
             authenticated: boolean;
             displayName: string;
@@ -466,7 +590,7 @@ export interface components {
             relations: components["schemas"]["RelationInput"][];
         };
         CaseInput: components["schemas"]["WorkingCopyInputBase"] & {
-            /** @constant */
+            /** @enum {string} */
             kind: "CASE";
             problem: string;
             conclusion: string;
@@ -486,7 +610,7 @@ export interface components {
             kind: "CASE";
         };
         ReferenceInput: components["schemas"]["WorkingCopyInputBase"] & {
-            /** @constant */
+            /** @enum {string} */
             kind: "REFERENCE";
             purpose: string;
             rules: components["schemas"]["ReferenceRule"][];
@@ -503,7 +627,7 @@ export interface components {
             kind: "REFERENCE";
         };
         QuestionInput: components["schemas"]["WorkingCopyInputBase"] & {
-            /** @constant */
+            /** @enum {string} */
             kind: "QUESTION";
             /**
              * @description Backend Inquiry lifecycle의 축약 view다.
@@ -530,7 +654,7 @@ export interface components {
             kind: "QUESTION";
         };
         ProjectDecisionInput: components["schemas"]["WorkingCopyInputBase"] & {
-            /** @constant */
+            /** @enum {string} */
             kind: "PROJECT_DECISION";
             /**
              * @description UI 용어다. Backend Domain의 `ACCEPTED`/`ADOPTED` 명칭이 다르면
@@ -565,7 +689,7 @@ export interface components {
             updatedAt: string;
         };
         CaseWorkingCopy: components["schemas"]["WorkingCopyBase"] & {
-            /** @constant */
+            /** @enum {string} */
             kind: "CASE";
             problem: string;
             conclusion: string;
@@ -582,7 +706,7 @@ export interface components {
             kind: "CASE";
         };
         ReferenceWorkingCopy: components["schemas"]["WorkingCopyBase"] & {
-            /** @constant */
+            /** @enum {string} */
             kind: "REFERENCE";
             purpose: string;
             rules: components["schemas"]["ReferenceRule"][];
@@ -599,7 +723,7 @@ export interface components {
             kind: "REFERENCE";
         };
         QuestionWorkingCopy: components["schemas"]["WorkingCopyBase"] & {
-            /** @constant */
+            /** @enum {string} */
             kind: "QUESTION";
             /** @enum {string|null} */
             questionStatus: "OPEN" | "RESOLVED" | null;
@@ -618,7 +742,7 @@ export interface components {
             kind: "QUESTION";
         };
         ProjectDecisionWorkingCopy: components["schemas"]["WorkingCopyBase"] & {
-            /** @constant */
+            /** @enum {string} */
             kind: "PROJECT_DECISION";
             /** @enum {string|null} */
             decisionStatus: "PROPOSED" | "ADOPTED" | null;
@@ -789,7 +913,7 @@ export interface components {
         };
         Inline: components["schemas"]["InlineText"] | components["schemas"]["InlineEmphasis"] | components["schemas"]["InlineStrong"] | components["schemas"]["InlineCode"] | components["schemas"]["InlineLink"] | components["schemas"]["InlineStatus"];
         InlineEmphasis: components["schemas"]["InlineContainer"] & {
-            /** @constant */
+            /** @enum {string} */
             type?: "EMPHASIS";
         } & {
             /**
@@ -799,7 +923,7 @@ export interface components {
             type: "EMPHASIS";
         };
         InlineStrong: components["schemas"]["InlineContainer"] & {
-            /** @constant */
+            /** @enum {string} */
             type?: "STRONG";
         } & {
             /**
@@ -844,7 +968,7 @@ export interface components {
             items: components["schemas"]["ListItem"][];
         };
         UnorderedListBlock: components["schemas"]["ListBlockBase"] & {
-            /** @constant */
+            /** @enum {string} */
             type?: "UNORDERED_LIST";
         } & {
             /**
@@ -854,7 +978,7 @@ export interface components {
             type: "UNORDERED_LIST";
         };
         OrderedListBlock: components["schemas"]["ListBlockBase"] & {
-            /** @constant */
+            /** @enum {string} */
             type?: "ORDERED_LIST";
         } & {
             /**
@@ -952,7 +1076,7 @@ export interface components {
         };
         CaseRenderBlock: components["schemas"]["HeadingBlock"] | components["schemas"]["ParagraphBlock"] | components["schemas"]["BlockquoteBlock"] | components["schemas"]["UnorderedListBlock"] | components["schemas"]["OrderedListBlock"] | components["schemas"]["CodeBlock"] | components["schemas"]["DataTableBlock"] | components["schemas"]["CalloutBlock"] | components["schemas"]["EvidenceFigureBlock"];
         CasePublicRenderModel: components["schemas"]["PublicRenderModelBase"] & {
-            /** @constant */
+            /** @enum {string} */
             kind: "CASE";
             problem: string;
             conclusion: string;
@@ -969,7 +1093,7 @@ export interface components {
             kind: "CASE";
         };
         ReferencePublicRenderModel: components["schemas"]["PublicRenderModelBase"] & {
-            /** @constant */
+            /** @enum {string} */
             kind: "REFERENCE";
             purpose: string;
             rules: components["schemas"]["ReferenceRule"][];
@@ -991,7 +1115,7 @@ export interface components {
             linkLabel: string;
         };
         QuestionPublicRenderModel: components["schemas"]["PublicRenderModelBase"] & {
-            /** @constant */
+            /** @enum {string} */
             kind: "QUESTION";
             /**
              * @description 공개 표현용 축약 상태다. Domain의 `INVESTIGATING`/`PAUSED`는 `OPEN`으로 표현된다.
@@ -1013,7 +1137,7 @@ export interface components {
             kind: "QUESTION";
         };
         ProjectDecisionPublicRenderModel: components["schemas"]["PublicRenderModelBase"] & {
-            /** @constant */
+            /** @enum {string} */
             kind: "PROJECT_DECISION";
             /** @enum {string} */
             status: "PROPOSED" | "ADOPTED";
@@ -1246,25 +1370,6 @@ export interface components {
             path: string;
             message: string;
         };
-        ProblemDetails: {
-            /** Format: uri-reference */
-            type: string;
-            title: string;
-            status: number;
-            detail: string;
-            /** @enum {string} */
-            code: "AUTHENTICATION_REQUIRED" | "STUDIO_ACCESS_DENIED" | "DOCUMENT_NOT_FOUND" | "VERSION_CONFLICT" | "REQUEST_VALIDATION_FAILED" | "VALIDATION_FAILED" | "VALIDATION_STALE" | "PREVIEW_NOT_FOUND" | "PREVIEW_STALE" | "PREVIEW_EXPIRED" | "PUBLICATION_NOT_FOUND" | "PUBLICATION_CONFLICT" | "PUBLICATION_EVENT_NOT_FOUND" | "PUBLICATION_SNAPSHOT_NOT_FOUND" | "WARNING_ACKNOWLEDGEMENT_REQUIRED" | "IDEMPOTENCY_KEY_REUSED" | "ASSET_NOT_FOUND" | "ASSET_NOT_READY" | "ASSET_IN_USE" | "ASSET_QUARANTINED" | "PAYLOAD_TOO_LARGE" | "UNSUPPORTED_MEDIA_TYPE" | "STUDIO_UNAVAILABLE";
-            /** Format: uri-reference */
-            instance?: string;
-            traceId?: string;
-            fieldErrors?: components["schemas"]["FieldError"][];
-            latestDocument?: components["schemas"]["WorkingCopyDetail"];
-            latestPublication?: components["schemas"]["PublicationAggregate"];
-            conflictingFields?: string[];
-            retryable?: boolean;
-        } & {
-            [key: string]: unknown;
-        };
     };
     responses: {
         /** @description Malformed request */
@@ -1273,7 +1378,7 @@ export interface components {
                 [name: string]: unknown;
             };
             content: {
-                "application/problem+json": components["schemas"]["ProblemDetails"];
+                "application/json": components["schemas"]["ErrorEnvelope"];
             };
         };
         /** @description Authentication required */
@@ -1282,7 +1387,7 @@ export interface components {
                 [name: string]: unknown;
             };
             content: {
-                "application/problem+json": components["schemas"]["ProblemDetails"];
+                "application/json": components["schemas"]["ErrorEnvelope"];
             };
         };
         /** @description Studio access denied */
@@ -1291,7 +1396,7 @@ export interface components {
                 [name: string]: unknown;
             };
             content: {
-                "application/problem+json": components["schemas"]["ProblemDetails"];
+                "application/json": components["schemas"]["ErrorEnvelope"];
             };
         };
         /** @description Document not found */
@@ -1300,7 +1405,7 @@ export interface components {
                 [name: string]: unknown;
             };
             content: {
-                "application/problem+json": components["schemas"]["ProblemDetails"];
+                "application/json": components["schemas"]["ErrorEnvelope"];
             };
         };
         /** @description Document or preview not found */
@@ -1309,7 +1414,7 @@ export interface components {
                 [name: string]: unknown;
             };
             content: {
-                "application/problem+json": components["schemas"]["ProblemDetails"];
+                "application/json": components["schemas"]["ErrorEnvelope"];
             };
         };
         /** @description Publication not found */
@@ -1318,7 +1423,7 @@ export interface components {
                 [name: string]: unknown;
             };
             content: {
-                "application/problem+json": components["schemas"]["ProblemDetails"];
+                "application/json": components["schemas"]["ErrorEnvelope"];
             };
         };
         /** @description Publication event or snapshot not found */
@@ -1327,7 +1432,7 @@ export interface components {
                 [name: string]: unknown;
             };
             content: {
-                "application/problem+json": components["schemas"]["ProblemDetails"];
+                "application/json": components["schemas"]["ErrorEnvelope"];
             };
         };
         /** @description Asset not found */
@@ -1336,7 +1441,7 @@ export interface components {
                 [name: string]: unknown;
             };
             content: {
-                "application/problem+json": components["schemas"]["ProblemDetails"];
+                "application/json": components["schemas"]["ErrorEnvelope"];
             };
         };
         /** @description Command conflicts with current state, freshness, or idempotency.
@@ -1348,7 +1453,7 @@ export interface components {
                 [name: string]: unknown;
             };
             content: {
-                "application/problem+json": components["schemas"]["ProblemDetails"];
+                "application/json": components["schemas"]["ErrorEnvelope"];
             };
         };
         /** @description Request validation failed */
@@ -1357,7 +1462,7 @@ export interface components {
                 [name: string]: unknown;
             };
             content: {
-                "application/problem+json": components["schemas"]["ProblemDetails"];
+                "application/json": components["schemas"]["ErrorEnvelope"];
             };
         };
         /** @description Preview 생성이 도메인 규칙으로 거절되었다 */
@@ -1366,7 +1471,7 @@ export interface components {
                 [name: string]: unknown;
             };
             content: {
-                "application/problem+json": components["schemas"]["ProblemDetails"];
+                "application/json": components["schemas"]["ErrorEnvelope"];
             };
         };
         /** @description Publication validation이 실패했다.
@@ -1379,7 +1484,7 @@ export interface components {
                 [name: string]: unknown;
             };
             content: {
-                "application/problem+json": components["schemas"]["ProblemDetails"];
+                "application/json": components["schemas"]["ErrorEnvelope"];
             };
         };
         /** @description Asset metadata 변경이 거절되었다 */
@@ -1388,7 +1493,7 @@ export interface components {
                 [name: string]: unknown;
             };
             content: {
-                "application/problem+json": components["schemas"]["ProblemDetails"];
+                "application/json": components["schemas"]["ErrorEnvelope"];
             };
         };
         /** @description Upload exceeds the configured size limit */
@@ -1397,7 +1502,7 @@ export interface components {
                 [name: string]: unknown;
             };
             content: {
-                "application/problem+json": components["schemas"]["ProblemDetails"];
+                "application/json": components["schemas"]["ErrorEnvelope"];
             };
         };
         /** @description Unsupported media type */
@@ -1406,7 +1511,7 @@ export interface components {
                 [name: string]: unknown;
             };
             content: {
-                "application/problem+json": components["schemas"]["ProblemDetails"];
+                "application/json": components["schemas"]["ErrorEnvelope"];
             };
         };
         /** @description Studio unavailable */
@@ -1415,7 +1520,7 @@ export interface components {
                 [name: string]: unknown;
             };
             content: {
-                "application/problem+json": components["schemas"]["ProblemDetails"];
+                "application/json": components["schemas"]["ErrorEnvelope"];
             };
         };
     };
@@ -1470,7 +1575,7 @@ export interface operations {
                     [name: string]: unknown;
                 };
                 content: {
-                    "application/json": components["schemas"]["StudioSession"];
+                    "application/json": components["schemas"]["StudioSessionEnvelope"];
                 };
             };
             401: components["responses"]["AuthenticationRequired"];
@@ -1493,7 +1598,7 @@ export interface operations {
                     [name: string]: unknown;
                 };
                 content: {
-                    "application/json": components["schemas"]["StudioDashboard"];
+                    "application/json": components["schemas"]["StudioDashboardEnvelope"];
                 };
             };
             401: components["responses"]["AuthenticationRequired"];
@@ -1527,7 +1632,7 @@ export interface operations {
                     [name: string]: unknown;
                 };
                 content: {
-                    "application/json": components["schemas"]["DocumentPage"];
+                    "application/json": components["schemas"]["DocumentPageEnvelope"];
                 };
             };
             400: components["responses"]["MalformedRequest"];
@@ -1565,7 +1670,7 @@ export interface operations {
                     [name: string]: unknown;
                 };
                 content: {
-                    "application/json": components["schemas"]["WorkingCopy"];
+                    "application/json": components["schemas"]["WorkingCopyEnvelope"];
                 };
             };
             400: components["responses"]["MalformedRequest"];
@@ -1593,7 +1698,7 @@ export interface operations {
                     [name: string]: unknown;
                 };
                 content: {
-                    "application/json": components["schemas"]["WorkingCopyDetail"];
+                    "application/json": components["schemas"]["WorkingCopyDetailEnvelope"];
                 };
             };
             401: components["responses"]["AuthenticationRequired"];
@@ -1632,7 +1737,7 @@ export interface operations {
                     [name: string]: unknown;
                 };
                 content: {
-                    "application/json": components["schemas"]["WorkingCopyDetail"];
+                    "application/json": components["schemas"]["WorkingCopyDetailEnvelope"];
                 };
             };
             400: components["responses"]["MalformedRequest"];
@@ -1674,7 +1779,7 @@ export interface operations {
                     [name: string]: unknown;
                 };
                 content: {
-                    "application/json": components["schemas"]["ValidationReport"];
+                    "application/json": components["schemas"]["ValidationReportEnvelope"];
                 };
             };
             400: components["responses"]["MalformedRequest"];
@@ -1703,7 +1808,7 @@ export interface operations {
                     [name: string]: unknown;
                 };
                 content: {
-                    "application/json": components["schemas"]["PreviewDetail"];
+                    "application/json": components["schemas"]["PreviewDetailEnvelope"];
                 };
             };
             401: components["responses"]["AuthenticationRequired"];
@@ -1742,7 +1847,7 @@ export interface operations {
                     [name: string]: unknown;
                 };
                 content: {
-                    "application/json": components["schemas"]["PublicPreview"];
+                    "application/json": components["schemas"]["PublicPreviewEnvelope"];
                 };
             };
             400: components["responses"]["MalformedRequest"];
@@ -1784,7 +1889,7 @@ export interface operations {
                     [name: string]: unknown;
                 };
                 content: {
-                    "application/json": components["schemas"]["PublishResult"];
+                    "application/json": components["schemas"]["PublishResultEnvelope"];
                 };
             };
             400: components["responses"]["MalformedRequest"];
@@ -1818,7 +1923,7 @@ export interface operations {
                     [name: string]: unknown;
                 };
                 content: {
-                    "application/json": components["schemas"]["PublicationPage"];
+                    "application/json": components["schemas"]["PublicationPageEnvelope"];
                 };
             };
             400: components["responses"]["MalformedRequest"];
@@ -1858,7 +1963,7 @@ export interface operations {
                     [name: string]: unknown;
                 };
                 content: {
-                    "application/json": components["schemas"]["PublishResult"];
+                    "application/json": components["schemas"]["PublishResultEnvelope"];
                 };
             };
             400: components["responses"]["MalformedRequest"];
@@ -1887,7 +1992,7 @@ export interface operations {
                     [name: string]: unknown;
                 };
                 content: {
-                    "application/json": components["schemas"]["PublicationSnapshot"];
+                    "application/json": components["schemas"]["PublicationSnapshotEnvelope"];
                 };
             };
             401: components["responses"]["AuthenticationRequired"];
@@ -1918,7 +2023,7 @@ export interface operations {
                     [name: string]: unknown;
                 };
                 content: {
-                    "application/json": components["schemas"]["CatalogPage"];
+                    "application/json": components["schemas"]["CatalogPageEnvelope"];
                 };
             };
             400: components["responses"]["MalformedRequest"];
@@ -1951,7 +2056,7 @@ export interface operations {
                     [name: string]: unknown;
                 };
                 content: {
-                    "application/json": components["schemas"]["AssetPage"];
+                    "application/json": components["schemas"]["AssetPageEnvelope"];
                 };
             };
             400: components["responses"]["MalformedRequest"];
@@ -1989,7 +2094,7 @@ export interface operations {
                     [name: string]: unknown;
                 };
                 content: {
-                    "application/json": components["schemas"]["Asset"];
+                    "application/json": components["schemas"]["AssetEnvelope"];
                 };
             };
             400: components["responses"]["MalformedRequest"];
@@ -2019,7 +2124,7 @@ export interface operations {
                     [name: string]: unknown;
                 };
                 content: {
-                    "application/json": components["schemas"]["AssetDetail"];
+                    "application/json": components["schemas"]["AssetDetailEnvelope"];
                 };
             };
             401: components["responses"]["AuthenticationRequired"];
@@ -2058,7 +2163,7 @@ export interface operations {
                     [name: string]: unknown;
                 };
                 content: {
-                    "application/json": components["schemas"]["Asset"];
+                    "application/json": components["schemas"]["AssetEnvelope"];
                 };
             };
             400: components["responses"]["MalformedRequest"];

src/features/tech-log/contracts/studio/studio-api.openapi.yaml

@@ -1,7 +1,7 @@
 openapi: 3.1.0
 info:
   title: Tech Log Studio API
-  version: 2.0.0
+  version: 3.0.0
   description: |
     Tech Log Studio orchestration 계약이다.
 
@@ -109,7 +109,7 @@ paths:
       tags: [Session]
       summary: 현재 Studio 세션과 CSRF 토큰을 조회한다
       responses:
-        "200": { description: 인증된 Studio 세션, content: { application/json: { schema: { $ref: "#/components/schemas/StudioSession" } } } }
+        "200": { description: 인증된 Studio 세션, content: { application/json: { schema: { $ref: "#/components/schemas/StudioSessionEnvelope" } } } }
         "401": { $ref: "#/components/responses/AuthenticationRequired" }
         "403": { $ref: "#/components/responses/AccessDenied" }
         "503": { $ref: "#/components/responses/StudioUnavailable" }
@@ -123,7 +123,7 @@ paths:
         `nextAction`을 포함한 모든 workflow 상태는 서버가 계산한다.
         Frontend는 여러 endpoint를 조합해 workflow 상태를 재추론하지 않는다.
       responses:
-        "200": { description: Dashboard lists and totals, content: { application/json: { schema: { $ref: "#/components/schemas/StudioDashboard" } } } }
+        "200": { description: Dashboard lists and totals, content: { application/json: { schema: { $ref: "#/components/schemas/StudioDashboardEnvelope" } } } }
         "401": { $ref: "#/components/responses/AuthenticationRequired" }
         "403": { $ref: "#/components/responses/AccessDenied" }
         "503": { $ref: "#/components/responses/StudioUnavailable" }
@@ -150,7 +150,7 @@ paths:
         - { $ref: "#/components/parameters/Cursor" }
         - { $ref: "#/components/parameters/Limit" }
       responses:
-        "200": { description: Working-copy cursor page, content: { application/json: { schema: { $ref: "#/components/schemas/DocumentPage" } } } }
+        "200": { description: Working-copy cursor page, content: { application/json: { schema: { $ref: "#/components/schemas/DocumentPageEnvelope" } } } }
         "400": { $ref: "#/components/responses/MalformedRequest" }
         "401": { $ref: "#/components/responses/AuthenticationRequired" }
         "403": { $ref: "#/components/responses/AccessDenied" }
@@ -169,7 +169,7 @@ paths:
         "201":
           description: Created working copy
           headers: { Idempotency-Replayed: { $ref: "#/components/headers/IdempotencyReplayed" } }
-          content: { application/json: { schema: { $ref: "#/components/schemas/WorkingCopy" } } }
+          content: { application/json: { schema: { $ref: "#/components/schemas/WorkingCopyEnvelope" } } }
         "400": { $ref: "#/components/responses/MalformedRequest" }
         "401": { $ref: "#/components/responses/AuthenticationRequired" }
         "403": { $ref: "#/components/responses/AccessDenied" }
@@ -184,7 +184,7 @@ paths:
       tags: [Documents]
       summary: Get a working copy and its current state
       responses:
-        "200": { description: Working-copy detail, content: { application/json: { schema: { $ref: "#/components/schemas/WorkingCopyDetail" } } } }
+        "200": { description: Working-copy detail, content: { application/json: { schema: { $ref: "#/components/schemas/WorkingCopyDetailEnvelope" } } } }
         "401": { $ref: "#/components/responses/AuthenticationRequired" }
         "403": { $ref: "#/components/responses/AccessDenied" }
         "404": { $ref: "#/components/responses/DocumentNotFound" }
@@ -197,8 +197,8 @@ paths:
         편집 가능한 content field만 저장한다. lifecycle 전이는 명시적인 Domain
         Action이 담당한다. 저장은 Public Projection을 변경하지 않는다.
 
-        `expectedVersion` 불일치는 `VERSION_CONFLICT`이며 응답 `ProblemDetails`의
-        `latestDocument`로 현재 상태를 함께 제공한다.
+        `expectedVersion` 불일치는 `VERSION_CONFLICT`이며 응답 `error.details`
+        (`VersionConflictDetails`)의 `latestDocument`로 현재 상태를 함께 제공한다.
       parameters:
         - { $ref: "#/components/parameters/IdempotencyKey" }
         - { $ref: "#/components/parameters/CsrfToken" }
@@ -207,7 +207,7 @@ paths:
         "200":
           description: Saved working-copy detail
           headers: { Idempotency-Replayed: { $ref: "#/components/headers/IdempotencyReplayed" } }
-          content: { application/json: { schema: { $ref: "#/components/schemas/WorkingCopyDetail" } } }
+          content: { application/json: { schema: { $ref: "#/components/schemas/WorkingCopyDetailEnvelope" } } }
         "400": { $ref: "#/components/responses/MalformedRequest" }
         "401": { $ref: "#/components/responses/AuthenticationRequired" }
         "403": { $ref: "#/components/responses/AccessDenied" }
@@ -244,7 +244,7 @@ paths:
         "200":
           description: Validation report
           headers: { Idempotency-Replayed: { $ref: "#/components/headers/IdempotencyReplayed" } }
-          content: { application/json: { schema: { $ref: "#/components/schemas/ValidationReport" } } }
+          content: { application/json: { schema: { $ref: "#/components/schemas/ValidationReportEnvelope" } } }
         "400": { $ref: "#/components/responses/MalformedRequest" }
         "401": { $ref: "#/components/responses/AuthenticationRequired" }
         "403": { $ref: "#/components/responses/AccessDenied" }
@@ -264,7 +264,7 @@ paths:
         anonymous `/preview/{token}` 계약은 폐기되었다. Preview는 인증된
         Studio API로만 조회한다.
       responses:
-        "200": { description: Preview detail, content: { application/json: { schema: { $ref: "#/components/schemas/PreviewDetail" } } } }
+        "200": { description: Preview detail, content: { application/json: { schema: { $ref: "#/components/schemas/PreviewDetailEnvelope" } } } }
         "401": { $ref: "#/components/responses/AuthenticationRequired" }
         "403": { $ref: "#/components/responses/AccessDenied" }
         "404": { $ref: "#/components/responses/PreviewNotFound" }
@@ -285,7 +285,7 @@ paths:
         "201":
           description: Created preview
           headers: { Idempotency-Replayed: { $ref: "#/components/headers/IdempotencyReplayed" } }
-          content: { application/json: { schema: { $ref: "#/components/schemas/PublicPreview" } } }
+          content: { application/json: { schema: { $ref: "#/components/schemas/PublicPreviewEnvelope" } } }
         "400": { $ref: "#/components/responses/MalformedRequest" }
         "401": { $ref: "#/components/responses/AuthenticationRequired" }
         "403": { $ref: "#/components/responses/AccessDenied" }
@@ -329,7 +329,7 @@ paths:
         "200":
           description: Publication aggregate and immutable event
           headers: { Idempotency-Replayed: { $ref: "#/components/headers/IdempotencyReplayed" } }
-          content: { application/json: { schema: { $ref: "#/components/schemas/PublishResult" } } }
+          content: { application/json: { schema: { $ref: "#/components/schemas/PublishResultEnvelope" } } }
         "400": { $ref: "#/components/responses/MalformedRequest" }
         "401": { $ref: "#/components/responses/AuthenticationRequired" }
         "403": { $ref: "#/components/responses/AccessDenied" }
@@ -350,7 +350,7 @@ paths:
         - { $ref: "#/components/parameters/Cursor" }
         - { $ref: "#/components/parameters/Limit" }
       responses:
-        "200": { description: Publication cursor page, content: { application/json: { schema: { $ref: "#/components/schemas/PublicationPage" } } } }
+        "200": { description: Publication cursor page, content: { application/json: { schema: { $ref: "#/components/schemas/PublicationPageEnvelope" } } } }
         "400": { $ref: "#/components/responses/MalformedRequest" }
         "401": { $ref: "#/components/responses/AuthenticationRequired" }
         "403": { $ref: "#/components/responses/AccessDenied" }
@@ -379,7 +379,7 @@ paths:
         "200":
           description: Updated publication aggregate and event
           headers: { Idempotency-Replayed: { $ref: "#/components/headers/IdempotencyReplayed" } }
-          content: { application/json: { schema: { $ref: "#/components/schemas/PublishResult" } } }
+          content: { application/json: { schema: { $ref: "#/components/schemas/PublishResultEnvelope" } } }
         "400": { $ref: "#/components/responses/MalformedRequest" }
         "401": { $ref: "#/components/responses/AuthenticationRequired" }
         "403": { $ref: "#/components/responses/AccessDenied" }
@@ -401,7 +401,7 @@ paths:
         `UNPUBLISHED` Event는 자체 snapshot을 갖지 않는다. 이 경우
         `sourcePublishedEventId`가 가리키는 마지막 공개 Snapshot을 사용한다.
       responses:
-        "200": { description: Publication snapshot, content: { application/json: { schema: { $ref: "#/components/schemas/PublicationSnapshot" } } } }
+        "200": { description: Publication snapshot, content: { application/json: { schema: { $ref: "#/components/schemas/PublicationSnapshotEnvelope" } } } }
         "401": { $ref: "#/components/responses/AuthenticationRequired" }
         "403": { $ref: "#/components/responses/AccessDenied" }
         "404": { $ref: "#/components/responses/PublicationSnapshotNotFound" }
@@ -430,7 +430,7 @@ paths:
         - { $ref: "#/components/parameters/Cursor" }
         - { $ref: "#/components/parameters/Limit" }
       responses:
-        "200": { description: Catalog cursor page, content: { application/json: { schema: { $ref: "#/components/schemas/CatalogPage" } } } }
+        "200": { description: Catalog cursor page, content: { application/json: { schema: { $ref: "#/components/schemas/CatalogPageEnvelope" } } } }
         "400": { $ref: "#/components/responses/MalformedRequest" }
         "401": { $ref: "#/components/responses/AuthenticationRequired" }
         "403": { $ref: "#/components/responses/AccessDenied" }
@@ -449,7 +449,7 @@ paths:
         - { $ref: "#/components/parameters/Cursor" }
         - { $ref: "#/components/parameters/Limit" }
       responses:
-        "200": { description: Asset cursor page, content: { application/json: { schema: { $ref: "#/components/schemas/AssetPage" } } } }
+        "200": { description: Asset cursor page, content: { application/json: { schema: { $ref: "#/components/schemas/AssetPageEnvelope" } } } }
         "400": { $ref: "#/components/responses/MalformedRequest" }
         "401": { $ref: "#/components/responses/AuthenticationRequired" }
         "403": { $ref: "#/components/responses/AccessDenied" }
@@ -483,7 +483,7 @@ paths:
         "201":
           description: Stored asset
           headers: { Idempotency-Replayed: { $ref: "#/components/headers/IdempotencyReplayed" } }
-          content: { application/json: { schema: { $ref: "#/components/schemas/Asset" } } }
+          content: { application/json: { schema: { $ref: "#/components/schemas/AssetEnvelope" } } }
         "400": { $ref: "#/components/responses/MalformedRequest" }
         "401": { $ref: "#/components/responses/AuthenticationRequired" }
         "403": { $ref: "#/components/responses/AccessDenied" }
@@ -500,7 +500,7 @@ paths:
       tags: [Assets]
       summary: Get an asset with its usage
       responses:
-        "200": { description: Asset detail, content: { application/json: { schema: { $ref: "#/components/schemas/AssetDetail" } } } }
+        "200": { description: Asset detail, content: { application/json: { schema: { $ref: "#/components/schemas/AssetDetailEnvelope" } } } }
         "401": { $ref: "#/components/responses/AuthenticationRequired" }
         "403": { $ref: "#/components/responses/AccessDenied" }
         "404": { $ref: "#/components/responses/AssetNotFound" }
@@ -520,7 +520,7 @@ paths:
         "200":
           description: Updated asset
           headers: { Idempotency-Replayed: { $ref: "#/components/headers/IdempotencyReplayed" } }
-          content: { application/json: { schema: { $ref: "#/components/schemas/Asset" } } }
+          content: { application/json: { schema: { $ref: "#/components/schemas/AssetEnvelope" } } }
         "400": { $ref: "#/components/responses/MalformedRequest" }
         "401": { $ref: "#/components/responses/AuthenticationRequired" }
         "403": { $ref: "#/components/responses/AccessDenied" }
@@ -593,43 +593,232 @@ components:
     IdempotencyReplayed: { description: True when the original result was replayed, schema: { type: boolean } }
 
   responses:
-    MalformedRequest: { description: Malformed request, x-error-codes: [REQUEST_VALIDATION_FAILED], content: { application/problem+json: { schema: { $ref: "#/components/schemas/ProblemDetails" } } } }
-    AuthenticationRequired: { description: Authentication required, x-error-codes: [AUTHENTICATION_REQUIRED], content: { application/problem+json: { schema: { $ref: "#/components/schemas/ProblemDetails" } } } }
-    AccessDenied: { description: Studio access denied, x-error-codes: [STUDIO_ACCESS_DENIED], content: { application/problem+json: { schema: { $ref: "#/components/schemas/ProblemDetails" } } } }
-    DocumentNotFound: { description: Document not found, x-error-codes: [DOCUMENT_NOT_FOUND], content: { application/problem+json: { schema: { $ref: "#/components/schemas/ProblemDetails" } } } }
-    PreviewNotFound: { description: Document or preview not found, x-error-codes: [DOCUMENT_NOT_FOUND, PREVIEW_NOT_FOUND], content: { application/problem+json: { schema: { $ref: "#/components/schemas/ProblemDetails" } } } }
-    PublicationNotFound: { description: Publication not found, x-error-codes: [PUBLICATION_NOT_FOUND], content: { application/problem+json: { schema: { $ref: "#/components/schemas/ProblemDetails" } } } }
-    PublicationSnapshotNotFound: { description: Publication event or snapshot not found, x-error-codes: [PUBLICATION_EVENT_NOT_FOUND, PUBLICATION_SNAPSHOT_NOT_FOUND], content: { application/problem+json: { schema: { $ref: "#/components/schemas/ProblemDetails" } } } }
-    AssetNotFound: { description: Asset not found, x-error-codes: [ASSET_NOT_FOUND], content: { application/problem+json: { schema: { $ref: "#/components/schemas/ProblemDetails" } } } }
+    MalformedRequest: { description: Malformed request, x-error-codes: [REQUEST_VALIDATION_FAILED], content: { application/json: { schema: { $ref: "#/components/schemas/ErrorEnvelope" } } } }
+    AuthenticationRequired: { description: Authentication required, x-error-codes: [AUTHENTICATION_REQUIRED], content: { application/json: { schema: { $ref: "#/components/schemas/ErrorEnvelope" } } } }
+    AccessDenied: { description: Studio access denied, x-error-codes: [STUDIO_ACCESS_DENIED], content: { application/json: { schema: { $ref: "#/components/schemas/ErrorEnvelope" } } } }
+    DocumentNotFound: { description: Document not found, x-error-codes: [DOCUMENT_NOT_FOUND], content: { application/json: { schema: { $ref: "#/components/schemas/ErrorEnvelope" } } } }
+    PreviewNotFound: { description: Document or preview not found, x-error-codes: [DOCUMENT_NOT_FOUND, PREVIEW_NOT_FOUND], content: { application/json: { schema: { $ref: "#/components/schemas/ErrorEnvelope" } } } }
+    PublicationNotFound: { description: Publication not found, x-error-codes: [PUBLICATION_NOT_FOUND], content: { application/json: { schema: { $ref: "#/components/schemas/ErrorEnvelope" } } } }
+    PublicationSnapshotNotFound: { description: Publication event or snapshot not found, x-error-codes: [PUBLICATION_EVENT_NOT_FOUND, PUBLICATION_SNAPSHOT_NOT_FOUND], content: { application/json: { schema: { $ref: "#/components/schemas/ErrorEnvelope" } } } }
+    AssetNotFound: { description: Asset not found, x-error-codes: [ASSET_NOT_FOUND], content: { application/json: { schema: { $ref: "#/components/schemas/ErrorEnvelope" } } } }
     CommandConflict:
       description: |
         Command conflicts with current state, freshness, or idempotency.
 
         `ASSET_IN_USE`는 사용 중이거나 공개 이력이 있는 Asset의 hard delete 시도다.
       x-error-codes: [VERSION_CONFLICT, PUBLICATION_CONFLICT, VALIDATION_STALE, PREVIEW_STALE, PREVIEW_EXPIRED, IDEMPOTENCY_KEY_REUSED, ASSET_IN_USE]
-      content: { application/problem+json: { schema: { $ref: "#/components/schemas/ProblemDetails" } } }
-    RequestValidationFailed: { description: Request validation failed, x-error-codes: [REQUEST_VALIDATION_FAILED], content: { application/problem+json: { schema: { $ref: "#/components/schemas/ProblemDetails" } } } }
+      content: { application/json: { schema: { $ref: "#/components/schemas/ErrorEnvelope" } } }
+    RequestValidationFailed: { description: Request validation failed, x-error-codes: [REQUEST_VALIDATION_FAILED], content: { application/json: { schema: { $ref: "#/components/schemas/ErrorEnvelope" } } } }
     PreviewRejected:
       description: Preview 생성이 도메인 규칙으로 거절되었다
-      x-error-codes: [REQUEST_VALIDATION_FAILED, VALIDATION_FAILED, ASSET_NOT_READY, ASSET_QUARANTINED]
-      content: { application/problem+json: { schema: { $ref: "#/components/schemas/ProblemDetails" } } }
+      x-error-codes: [REQUEST_VALIDATION_FAILED, DOCUMENT_VALIDATION_FAILED, ASSET_NOT_READY, ASSET_QUARANTINED]
+      content: { application/json: { schema: { $ref: "#/components/schemas/ErrorEnvelope" } } }
     PublishRejected:
       description: |
         Publication validation이 실패했다.
 
         `WARNING_ACKNOWLEDGEMENT_REQUIRED`는 `acknowledgedWarningCodes`가
         현재 Validation의 WARNING 집합을 덮지 못한 경우다.
-      x-error-codes: [REQUEST_VALIDATION_FAILED, VALIDATION_FAILED, WARNING_ACKNOWLEDGEMENT_REQUIRED, ASSET_NOT_READY, ASSET_QUARANTINED]
-      content: { application/problem+json: { schema: { $ref: "#/components/schemas/ProblemDetails" } } }
+      x-error-codes: [REQUEST_VALIDATION_FAILED, DOCUMENT_VALIDATION_FAILED, WARNING_ACKNOWLEDGEMENT_REQUIRED, ASSET_NOT_READY, ASSET_QUARANTINED]
+      content: { application/json: { schema: { $ref: "#/components/schemas/ErrorEnvelope" } } }
     AssetRejected:
       description: Asset metadata 변경이 거절되었다
       x-error-codes: [REQUEST_VALIDATION_FAILED, ASSET_NOT_READY, ASSET_QUARANTINED]
-      content: { application/problem+json: { schema: { $ref: "#/components/schemas/ProblemDetails" } } }
-    PayloadTooLarge: { description: Upload exceeds the configured size limit, x-error-codes: [PAYLOAD_TOO_LARGE], content: { application/problem+json: { schema: { $ref: "#/components/schemas/ProblemDetails" } } } }
-    UnsupportedMediaType: { description: Unsupported media type, x-error-codes: [UNSUPPORTED_MEDIA_TYPE], content: { application/problem+json: { schema: { $ref: "#/components/schemas/ProblemDetails" } } } }
-    StudioUnavailable: { description: Studio unavailable, x-error-codes: [STUDIO_UNAVAILABLE], content: { application/problem+json: { schema: { $ref: "#/components/schemas/ProblemDetails" } } } }
+      content: { application/json: { schema: { $ref: "#/components/schemas/ErrorEnvelope" } } }
+    PayloadTooLarge: { description: Upload exceeds the configured size limit, x-error-codes: [PAYLOAD_TOO_LARGE], content: { application/json: { schema: { $ref: "#/components/schemas/ErrorEnvelope" } } } }
+    UnsupportedMediaType: { description: Unsupported media type, x-error-codes: [UNSUPPORTED_MEDIA_TYPE], content: { application/json: { schema: { $ref: "#/components/schemas/ErrorEnvelope" } } } }
+    StudioUnavailable: { description: Studio unavailable, x-error-codes: [STUDIO_UNAVAILABLE], content: { application/json: { schema: { $ref: "#/components/schemas/ErrorEnvelope" } } } }
 
   schemas:
+    # ------------------------------------------------------------- envelope
+    # wire format은 봉투다 (ADR-006). payload 스키마는 그대로 두고
+    # 응답만 <Payload>Envelope으로 감싼다.
+    ResponseMeta:
+      type: object
+      additionalProperties: false
+      required: [requestId, traceId]
+      properties:
+        requestId: { type: string, minLength: 1, maxLength: 200 }
+        traceId: { type: string, minLength: 1, maxLength: 200 }
+        correlationId: { type: [string, "null"], maxLength: 200 }
+        page: { type: ["object", "null"], additionalProperties: true, description: "Studio는 body 안 cursor 페이지네이션을 쓰므로 항상 null이다. 백엔드 템플릿의 ResponseMeta record가 이 필드를 직렬화한다." }
+    ApiError:
+      type: object
+      additionalProperties: false
+      required: [code, category, message, retryable]
+      properties:
+        code:
+          type: string
+          enum: [AUTHENTICATION_REQUIRED, STUDIO_ACCESS_DENIED, DOCUMENT_NOT_FOUND, VERSION_CONFLICT,
+                 REQUEST_VALIDATION_FAILED, DOCUMENT_VALIDATION_FAILED, VALIDATION_STALE, PREVIEW_NOT_FOUND,
+                 PREVIEW_STALE, PREVIEW_EXPIRED, PUBLICATION_NOT_FOUND, PUBLICATION_CONFLICT,
+                 PUBLICATION_EVENT_NOT_FOUND, PUBLICATION_SNAPSHOT_NOT_FOUND,
+                 WARNING_ACKNOWLEDGEMENT_REQUIRED, IDEMPOTENCY_KEY_REUSED, ASSET_NOT_FOUND,
+                 ASSET_NOT_READY, ASSET_IN_USE, ASSET_QUARANTINED, PAYLOAD_TOO_LARGE,
+                 UNSUPPORTED_MEDIA_TYPE, STUDIO_UNAVAILABLE]
+        category:
+          type: string
+          enum: [VALIDATION, AUTH, AUTHZ, NOT_FOUND, CONFLICT, RATE_LIMIT,
+                 TRANSIENT_DEPENDENCY, PERMANENT_DEPENDENCY, DATA_INTEGRITY, INTERNAL]
+        message: { type: string, minLength: 1, maxLength: 5000 }
+        retryable: { type: boolean }
+        details:
+          oneOf:
+            - $ref: "#/components/schemas/ValidationErrorDetails"
+            - $ref: "#/components/schemas/VersionConflictDetails"
+            - $ref: "#/components/schemas/PublicationConflictDetails"
+            - type: "null"
+    ErrorEnvelope:
+      type: object
+      additionalProperties: false
+      required: [success, error, meta]
+      properties:
+        success: { type: boolean, const: false }
+        error: { $ref: "#/components/schemas/ApiError" }
+        meta: { $ref: "#/components/schemas/ResponseMeta" }
+    ValidationErrorDetails:
+      type: object
+      additionalProperties: false
+      required: [fieldErrors]
+      properties:
+        fieldErrors: { type: array, maxItems: 200, items: { $ref: "#/components/schemas/FieldError" } }
+    VersionConflictDetails:
+      type: object
+      additionalProperties: false
+      required: [latestDocument]
+      properties:
+        latestDocument: { $ref: "#/components/schemas/WorkingCopyDetail" }
+        conflictingFields:
+          type: array
+          uniqueItems: true
+          maxItems: 200
+          items: { type: string, pattern: "^(?:/(?:[^~/]|~0|~1)*)*$" }
+    PublicationConflictDetails:
+      type: object
+      additionalProperties: false
+      required: [latestPublication]
+      properties:
+        latestPublication: { $ref: "#/components/schemas/PublicationAggregate" }
+    StudioSessionEnvelope:
+      type: object
+      additionalProperties: false
+      required: [success, data, meta]
+      properties:
+        success: { type: boolean, const: true }
+        data: { $ref: "#/components/schemas/StudioSession" }
+        meta: { $ref: "#/components/schemas/ResponseMeta" }
+    StudioDashboardEnvelope:
+      type: object
+      additionalProperties: false
+      required: [success, data, meta]
+      properties:
+        success: { type: boolean, const: true }
+        data: { $ref: "#/components/schemas/StudioDashboard" }
+        meta: { $ref: "#/components/schemas/ResponseMeta" }
+    DocumentPageEnvelope:
+      type: object
+      additionalProperties: false
+      required: [success, data, meta]
+      properties:
+        success: { type: boolean, const: true }
+        data: { $ref: "#/components/schemas/DocumentPage" }
+        meta: { $ref: "#/components/schemas/ResponseMeta" }
+    WorkingCopyDetailEnvelope:
+      type: object
+      additionalProperties: false
+      required: [success, data, meta]
+      properties:
+        success: { type: boolean, const: true }
+        data: { $ref: "#/components/schemas/WorkingCopyDetail" }
+        meta: { $ref: "#/components/schemas/ResponseMeta" }
+    WorkingCopyEnvelope:
+      type: object
+      additionalProperties: false
+      required: [success, data, meta]
+      properties:
+        success: { type: boolean, const: true }
+        data: { $ref: "#/components/schemas/WorkingCopy" }
+        meta: { $ref: "#/components/schemas/ResponseMeta" }
+    ValidationReportEnvelope:
+      type: object
+      additionalProperties: false
+      required: [success, data, meta]
+      properties:
+        success: { type: boolean, const: true }
+        data: { $ref: "#/components/schemas/ValidationReport" }
+        meta: { $ref: "#/components/schemas/ResponseMeta" }
+    PreviewDetailEnvelope:
+      type: object
+      additionalProperties: false
+      required: [success, data, meta]
+      properties:
+        success: { type: boolean, const: true }
+        data: { $ref: "#/components/schemas/PreviewDetail" }
+        meta: { $ref: "#/components/schemas/ResponseMeta" }
+    PublicPreviewEnvelope:
+      type: object
+      additionalProperties: false
+      required: [success, data, meta]
+      properties:
+        success: { type: boolean, const: true }
+        data: { $ref: "#/components/schemas/PublicPreview" }
+        meta: { $ref: "#/components/schemas/ResponseMeta" }
+    PublishResultEnvelope:
+      type: object
+      additionalProperties: false
+      required: [success, data, meta]
+      properties:
+        success: { type: boolean, const: true }
+        data: { $ref: "#/components/schemas/PublishResult" }
+        meta: { $ref: "#/components/schemas/ResponseMeta" }
+    PublicationPageEnvelope:
+      type: object
+      additionalProperties: false
+      required: [success, data, meta]
+      properties:
+        success: { type: boolean, const: true }
+        data: { $ref: "#/components/schemas/PublicationPage" }
+        meta: { $ref: "#/components/schemas/ResponseMeta" }
+    PublicationSnapshotEnvelope:
+      type: object
+      additionalProperties: false
+      required: [success, data, meta]
+      properties:
+        success: { type: boolean, const: true }
+        data: { $ref: "#/components/schemas/PublicationSnapshot" }
+        meta: { $ref: "#/components/schemas/ResponseMeta" }
+    CatalogPageEnvelope:
+      type: object
+      additionalProperties: false
+      required: [success, data, meta]
+      properties:
+        success: { type: boolean, const: true }
+        data: { $ref: "#/components/schemas/CatalogPage" }
+        meta: { $ref: "#/components/schemas/ResponseMeta" }
+    AssetPageEnvelope:
+      type: object
+      additionalProperties: false
+      required: [success, data, meta]
+      properties:
+        success: { type: boolean, const: true }
+        data: { $ref: "#/components/schemas/AssetPage" }
+        meta: { $ref: "#/components/schemas/ResponseMeta" }
+    AssetDetailEnvelope:
+      type: object
+      additionalProperties: false
+      required: [success, data, meta]
+      properties:
+        success: { type: boolean, const: true }
+        data: { $ref: "#/components/schemas/AssetDetail" }
+        meta: { $ref: "#/components/schemas/ResponseMeta" }
+    AssetEnvelope:
+      type: object
+      additionalProperties: false
+      required: [success, data, meta]
+      properties:
+        success: { type: boolean, const: true }
+        data: { $ref: "#/components/schemas/Asset" }
+        meta: { $ref: "#/components/schemas/ResponseMeta" }
     # ---------------------------------------------------------------- session
     StudioSession:
       type: object
@@ -739,7 +928,7 @@ components:
         - type: object
           required: [kind, problem, conclusion, environment, reproduction, lastVerifiedOn, bodyMarkdown]
           properties:
-            kind: { type: string, const: CASE }
+            kind: { type: string, enum: [CASE] }
             problem: { type: string, maxLength: 100000 }
             conclusion: { type: string, maxLength: 100000 }
             environment: { type: string, maxLength: 100000 }
@@ -758,7 +947,7 @@ components:
         - type: object
           required: [kind, purpose, rules, applyWhen, exceptions, examples, verifiedOn]
           properties:
-            kind: { type: string, const: REFERENCE }
+            kind: { type: string, enum: [REFERENCE] }
             purpose: { type: string, maxLength: 100000 }
             rules: { type: array, maxItems: 50, items: { $ref: "#/components/schemas/ReferenceRule" } }
             applyWhen: { type: array, maxItems: 50, items: { $ref: "#/components/schemas/OrderedText" } }
@@ -772,7 +961,7 @@ components:
         - type: object
           required: [kind, questionStatus, facts, assumptions, unknowns, constraints, options, nextValidation, resolution]
           properties:
-            kind: { type: string, const: QUESTION }
+            kind: { type: string, enum: [QUESTION] }
             questionStatus:
               type: [string, "null"]
               enum: [OPEN, RESOLVED, null]
@@ -799,7 +988,7 @@ components:
         - type: object
           required: [kind, decisionStatus, decidedOn, statement, rationale, consequences]
           properties:
-            kind: { type: string, const: PROJECT_DECISION }
+            kind: { type: string, enum: [PROJECT_DECISION] }
             decisionStatus:
               type: [string, "null"]
               enum: [PROPOSED, ADOPTED, null]
@@ -846,7 +1035,7 @@ components:
         - type: object
           required: [kind, problem, conclusion, environment, reproduction, lastVerifiedOn, bodyMarkdown]
           properties:
-            kind: { type: string, const: CASE }
+            kind: { type: string, enum: [CASE] }
             problem: { type: string, maxLength: 100000 }
             conclusion: { type: string, maxLength: 100000 }
             environment: { type: string, maxLength: 100000 }
@@ -860,7 +1049,7 @@ components:
         - type: object
           required: [kind, purpose, rules, applyWhen, exceptions, examples, verifiedOn]
           properties:
-            kind: { type: string, const: REFERENCE }
+            kind: { type: string, enum: [REFERENCE] }
             purpose: { type: string, maxLength: 100000 }
             rules: { type: array, maxItems: 50, items: { $ref: "#/components/schemas/ReferenceRule" } }
             applyWhen: { type: array, maxItems: 50, items: { $ref: "#/components/schemas/OrderedText" } }
@@ -874,7 +1063,7 @@ components:
         - type: object
           required: [kind, questionStatus, facts, assumptions, unknowns, constraints, options, nextValidation, resolution]
           properties:
-            kind: { type: string, const: QUESTION }
+            kind: { type: string, enum: [QUESTION] }
             questionStatus: { type: [string, "null"], enum: [OPEN, RESOLVED, null] }
             facts: { type: array, maxItems: 50, items: { $ref: "#/components/schemas/OrderedText" } }
             assumptions: { type: array, maxItems: 50, items: { $ref: "#/components/schemas/OrderedText" } }
@@ -893,7 +1082,7 @@ components:
         - type: object
           required: [kind, decisionStatus, decidedOn, statement, rationale, consequences]
           properties:
-            kind: { type: string, const: PROJECT_DECISION }
+            kind: { type: string, enum: [PROJECT_DECISION] }
             decisionStatus: { type: [string, "null"], enum: [PROPOSED, ADOPTED, null] }
             decidedOn: { type: [string, "null"], format: date }
             statement: { type: string, maxLength: 100000 }
@@ -1062,7 +1251,7 @@ components:
       additionalProperties: false
       required: [type, text]
       properties:
-        type: { type: string, const: TEXT }
+        type: { type: string, enum: [TEXT] }
         text: { type: string, minLength: 1, maxLength: 100000 }
     InlineContainer:
       type: object
@@ -1075,14 +1264,14 @@ components:
       additionalProperties: false
       required: [type, code]
       properties:
-        type: { type: string, const: INLINE_CODE }
+        type: { type: string, enum: [INLINE_CODE] }
         code: { type: string, minLength: 1, maxLength: 100000 }
     InlineLink:
       type: object
       additionalProperties: false
       required: [type, label, href]
       properties:
-        type: { type: string, const: LINK }
+        type: { type: string, enum: [LINK] }
         label: { type: string, minLength: 1, maxLength: 100000 }
         href: { type: string, format: uri, maxLength: 2000 }
     InlineStatus:
@@ -1090,7 +1279,7 @@ components:
       additionalProperties: false
       required: [type, label, tone]
       properties:
-        type: { type: string, const: STATUS }
+        type: { type: string, enum: [STATUS] }
         label: { type: string, minLength: 1, maxLength: 120 }
         tone: { type: string, enum: [warning, evidence, neutral] }
     Inline:
@@ -1114,18 +1303,18 @@ components:
       unevaluatedProperties: false
       allOf:
         - { $ref: "#/components/schemas/InlineContainer" }
-        - { type: object, properties: { type: { type: string, const: EMPHASIS } } }
+        - { type: object, properties: { type: { type: string, enum: [EMPHASIS] } } }
     InlineStrong:
       unevaluatedProperties: false
       allOf:
         - { $ref: "#/components/schemas/InlineContainer" }
-        - { type: object, properties: { type: { type: string, const: STRONG } } }
+        - { type: object, properties: { type: { type: string, enum: [STRONG] } } }
     HeadingBlock:
       type: object
       additionalProperties: false
       required: [type, id, level, content]
       properties:
-        type: { type: string, const: HEADING }
+        type: { type: string, enum: [HEADING] }
         id: { type: string, minLength: 1, maxLength: 200 }
         level: { type: integer, minimum: 2, maximum: 4 }
         content: { type: array, maxItems: 1000, items: { $ref: "#/components/schemas/Inline" } }
@@ -1134,14 +1323,14 @@ components:
       additionalProperties: false
       required: [type, content]
       properties:
-        type: { type: string, const: PARAGRAPH }
+        type: { type: string, enum: [PARAGRAPH] }
         content: { type: array, maxItems: 1000, items: { $ref: "#/components/schemas/Inline" } }
     BlockquoteBlock:
       type: object
       additionalProperties: false
       required: [type, content]
       properties:
-        type: { type: string, const: BLOCKQUOTE }
+        type: { type: string, enum: [BLOCKQUOTE] }
         content: { type: array, maxItems: 1000, items: { $ref: "#/components/schemas/Inline" } }
     ListItem:
       type: object
@@ -1160,18 +1349,18 @@ components:
       unevaluatedProperties: false
       allOf:
         - { $ref: "#/components/schemas/ListBlockBase" }
-        - { type: object, properties: { type: { type: string, const: UNORDERED_LIST } } }
+        - { type: object, properties: { type: { type: string, enum: [UNORDERED_LIST] } } }
     OrderedListBlock:
       unevaluatedProperties: false
       allOf:
         - { $ref: "#/components/schemas/ListBlockBase" }
-        - { type: object, properties: { type: { type: string, const: ORDERED_LIST } } }
+        - { type: object, properties: { type: { type: string, enum: [ORDERED_LIST] } } }
     CodeBlock:
       type: object
       additionalProperties: false
       required: [type, code, language, label]
       properties:
-        type: { type: string, const: CODE_BLOCK }
+        type: { type: string, enum: [CODE_BLOCK] }
         code: { type: string, maxLength: 100000 }
         language: { type: [string, "null"], maxLength: 100 }
         label: { type: [string, "null"], maxLength: 200 }
@@ -1202,7 +1391,7 @@ components:
       additionalProperties: false
       required: [type, id, caption, rowHeaderColumn, columns, rows]
       properties:
-        type: { type: string, const: DATA_TABLE }
+        type: { type: string, enum: [DATA_TABLE] }
         id: { type: string, minLength: 1, maxLength: 200 }
         caption: { type: string, maxLength: 1000 }
         rowHeaderColumn: { type: [integer, "null"], minimum: 1 }
@@ -1213,7 +1402,7 @@ components:
       additionalProperties: false
       required: [type, tone, label, content]
       properties:
-        type: { type: string, const: CALLOUT }
+        type: { type: string, enum: [CALLOUT] }
         tone: { type: string, enum: [warning, info] }
         label: { type: string, maxLength: 200 }
         content: { type: array, maxItems: 1000, items: { $ref: "#/components/schemas/Inline" } }
@@ -1236,7 +1425,7 @@ components:
         Asset decorative=true                          → alt="" 허용
         ```
       properties:
-        type: { type: string, const: EVIDENCE_FIGURE }
+        type: { type: string, enum: [EVIDENCE_FIGURE] }
         key: { type: string, minLength: 1, maxLength: 200 }
         alt: { type: string, maxLength: 1000 }
         caption: { type: string, maxLength: 1000 }
@@ -1288,7 +1477,7 @@ components:
         - type: object
           required: [kind, problem, conclusion, environment, reproduction, lastVerifiedOn, bodyBlocks]
           properties:
-            kind: { type: string, const: CASE }
+            kind: { type: string, enum: [CASE] }
             problem: { type: string, minLength: 1, maxLength: 100000 }
             conclusion: { type: string, minLength: 1, maxLength: 100000 }
             environment: { type: string, maxLength: 100000 }
@@ -1302,7 +1491,7 @@ components:
         - type: object
           required: [kind, purpose, rules, applyWhen, exceptions, examples, verifiedOn]
           properties:
-            kind: { type: string, const: REFERENCE }
+            kind: { type: string, enum: [REFERENCE] }
             purpose: { type: string, minLength: 1, maxLength: 100000 }
             rules: { type: array, minItems: 1, maxItems: 50, items: { $ref: "#/components/schemas/ReferenceRule" } }
             applyWhen: { type: array, minItems: 1, maxItems: 50, items: { $ref: "#/components/schemas/OrderedText" } }
@@ -1324,7 +1513,7 @@ components:
         - type: object
           required: [kind, status, facts, assumptions, unknowns, constraints, options, nextValidation, resolution]
           properties:
-            kind: { type: string, const: QUESTION }
+            kind: { type: string, enum: [QUESTION] }
             status:
               type: string
               enum: [OPEN, RESOLVED]
@@ -1346,7 +1535,7 @@ components:
         - type: object
           required: [kind, status, decidedOn, statement, rationale, consequences]
           properties:
-            kind: { type: string, const: PROJECT_DECISION }
+            kind: { type: string, enum: [PROJECT_DECISION] }
             status: { type: string, enum: [PROPOSED, ADOPTED] }
             decidedOn: { type: string, format: date }
             statement: { type: string, minLength: 1, maxLength: 100000 }
@@ -1645,51 +1834,3 @@ components:
           pattern: "^(?:/(?:[^~/]|~0|~1)*)*$"
           description: JSON Pointer to the invalid field
         message: { type: string, minLength: 1, maxLength: 1000 }
-    ProblemDetails:
-      type: object
-      additionalProperties: true
-      required: [type, title, status, detail, code]
-      properties:
-        type: { type: string, format: uri-reference }
-        title: { type: string, minLength: 1, maxLength: 200 }
-        status: { type: integer, minimum: 400, maximum: 599 }
-        detail: { type: string, minLength: 1, maxLength: 5000 }
-        code:
-          type: string
-          enum:
-            - AUTHENTICATION_REQUIRED
-            - STUDIO_ACCESS_DENIED
-            - DOCUMENT_NOT_FOUND
-            - VERSION_CONFLICT
-            - REQUEST_VALIDATION_FAILED
-            - VALIDATION_FAILED
-            - VALIDATION_STALE
-            - PREVIEW_NOT_FOUND
-            - PREVIEW_STALE
-            - PREVIEW_EXPIRED
-            - PUBLICATION_NOT_FOUND
-            - PUBLICATION_CONFLICT
-            - PUBLICATION_EVENT_NOT_FOUND
-            - PUBLICATION_SNAPSHOT_NOT_FOUND
-            - WARNING_ACKNOWLEDGEMENT_REQUIRED
-            - IDEMPOTENCY_KEY_REUSED
-            - ASSET_NOT_FOUND
-            - ASSET_NOT_READY
-            - ASSET_IN_USE
-            - ASSET_QUARANTINED
-            - PAYLOAD_TOO_LARGE
-            - UNSUPPORTED_MEDIA_TYPE
-            - STUDIO_UNAVAILABLE
-        instance: { type: string, format: uri-reference }
-        traceId: { type: string, maxLength: 200 }
-        fieldErrors: { type: array, maxItems: 200, items: { $ref: "#/components/schemas/FieldError" } }
-        latestDocument: { $ref: "#/components/schemas/WorkingCopyDetail" }
-        latestPublication: { $ref: "#/components/schemas/PublicationAggregate" }
-        conflictingFields:
-          type: array
-          uniqueItems: true
-          maxItems: 200
-          items:
-            type: string
-            pattern: "^(?:/(?:[^~/]|~0|~1)*)*$"
-        retryable: { type: boolean }

src/features/tech-log/contracts/tech-log-studio-contract-contribution.ts

@@ -8,6 +8,7 @@ import type {
 } from "../../../contracts/external-contract-runtime.ts";
 import { TECH_LOG_FEATURE_ID } from "../application/tech-log-feature-input.ts";
 import canonicalSource from "./studio/canonical-source.json" with { type: "json" };
+import type { ProblemDetails } from "./studio/contract.ts";
 import { STUDIO_ERROR_CODES } from "../adapters/http/studio-error-mapping.ts";
 import {
   assertExactlyOneTechLogStudioBootstrapOperation,
@@ -51,21 +52,70 @@ function zodValidator<T>(schemaId: string, schema: z.ZodType<T>): RuntimeValidat
 const passthrough = <T>(schemaId: string) =>
   zodValidator<T>(schemaId, z.unknown() as unknown as z.ZodType<T>);
 
-const problemSchema = z
+/**
+ * wire format은 봉투다 (ADR-006). 전송 계층은 봉투 뼈대만 검증하고 payload는
+ * 통과시킨다 — generated 타입이 컴파일 시점 계약이고, 런타임 재검증은 계약 갱신
+ * 때마다 두 곳을 고치게 만든다. 다만 봉투 자체는 반드시 검증한다: 여기서 통과시키면
+ * 잘못된 모양이 앱 계층까지 조용히 흘러간다.
+ */
+const metaSchema = z
+  .object({ requestId: z.string().min(1), traceId: z.string().min(1) })
+  .loose();
+
+export const envelopeData = <T>(schemaId: string): RuntimeValidator<T> =>
+  zodValidator<T>(
+    schemaId,
+    z
+      .object({ success: z.literal(true), data: z.unknown(), meta: metaSchema })
+      .loose()
+      .transform((envelope) => envelope.data as T) as unknown as z.ZodType<T>,
+  );
+
+const apiErrorSchema = z
   .object({
-    // canonical: `format: uri-reference` only, no length bound.
-    type: z.string().min(1),
-    title: z.string().min(1).max(200),
-    status: z.int().min(400).max(599),
-    detail: z.string().min(1).max(5000),
     code: z.enum(STUDIO_ERROR_CODES as unknown as [string, ...string[]]),
+    category: z.string().min(1),
+    message: z.string().min(1).max(5000),
+    retryable: z.boolean(),
   })
   .loose();
 
-const PROBLEM = zodValidator("StudioProblemDetails", problemSchema);
+/**
+ * 봉투 오류를 기존 ProblemDetails 형태로 옮긴다. 앱 계층(`StudioGatewayError`)은
+ * 그 모양을 계속 쓰므로 매핑을 여기서 끝내면 아래 계층이 무변경이다.
+ * `status`는 봉투에 없다 — 전송 계층이 실제 HTTP status를 따로 들고 있으므로
+ * 0으로 두고 `toStudioGatewayError`가 outcome의 status로 덮는다.
+ *
+ * (Task 3 fix round 1) `ProblemDetails`는 `contract.ts`에서 가져온다 — 이
+ * transform이 실제로 만드는 모양과 `contract.ts`가 선언하는 모양이 서로 다른
+ * 파일에서 독립적으로 정의되면(원래 상태) 둘이 갈라져도 아무 게이트도 못
+ * 잡는다. `details`는 wire 그대로 통째로 옮긴다 — `fieldErrors`/
+ * `latestDocument`/`conflictingFields`/`latestPublication`으로 분해하지
+ * 않는다. 지금 그 필드들을 평평하게 읽는 소비자가 없고, 분해는 실제 소비자가
+ * 생겼을 때 추가할 투기적 작업이다.
+ */
+export const envelopeError = (): RuntimeValidator<ProblemDetails> =>
+  zodValidator<ProblemDetails>(
+    "StudioErrorEnvelope",
+    z
+      .object({ success: z.literal(false), error: apiErrorSchema, meta: metaSchema })
+      .loose()
+      .transform((envelope) => ({
+        type: `https://techlog.local/problems/${envelope.error.code.toLowerCase().replaceAll("_", "-")}`,
+        title: envelope.error.code,
+        status: 0,
+        detail: envelope.error.message,
+        code: envelope.error.code,
+        retryable: envelope.error.retryable,
+        category: envelope.error.category,
+        details: (envelope.error as { details?: ProblemDetails["details"] }).details ?? null,
+      })) as unknown as z.ZodType<ProblemDetails>,
+  );
+
+const PROBLEM = envelopeError();
 
 /** 4xx 도메인 거절은 적용되지 않았음이 확정이다. 5xx/네트워크는 불확정이다. */
-const COMMAND_EFFECT: CommandEffectDescriptor<z.output<typeof problemSchema>> =
+const COMMAND_EFFECT: CommandEffectDescriptor<ProblemDetails> =
   Object.freeze({
     successEffect: "APPLIED_CONFIRMED" as const,
     classifyProblem({ status }: Readonly<{ status: number; problem: unknown }>) {
@@ -93,7 +143,7 @@ function safeOperation(
       method: "GET" as const,
       pathTemplate,
       inputValidator: passthrough(`${operationId}Input`),
-      outputValidator: passthrough(`${operationId}Output`),
+      outputValidator: envelopeData(`${operationId}Output`),
       problemValidator: PROBLEM,
       acceptedStatuses: Object.freeze([200]),
       emptyBodyStatuses: Object.freeze([]),
@@ -141,7 +191,7 @@ function keyedOperation(
       method,
       pathTemplate,
       inputValidator: passthrough(`${operationId}Input`),
-      outputValidator: passthrough(`${operationId}Output`),
+      outputValidator: envelopeData(`${operationId}Output`),
       problemValidator: PROBLEM,
       acceptedStatuses: Object.freeze([options.acceptedStatus]),
       emptyBodyStatuses: Object.freeze(options.acceptedStatus === 204 ? [204] : []),

tests/features/tech-log/asset-upload-transport.test.ts

@@ -20,6 +20,14 @@ const transport = () =>
 
 const svg = () => new File(["<svg/>"], "b.svg", { type: "image/svg+xml" });
 
+// wire format은 봉투다 (ADR-006) — `uploadStudioAsset`도 다른 operation과
+// 같은 `AssetEnvelope`/`ErrorEnvelope`를 쓴다.
+const META = { requestId: "r", traceId: "t", correlationId: null, page: null };
+const dataEnvelope = (data: unknown) => ({ success: true, data, meta: META });
+const errorEnvelope = (
+  error: Readonly<{ code: string; category: string; message: string; retryable: boolean }>,
+) => ({ success: false, error, meta: META });
+
 test("posts multipart form data with the supplied headers", async () => {
   let seen: { kind: unknown; alt: unknown; csrf: string | null; key: string | null } | null = null;
 
@@ -32,7 +40,7 @@ test("posts multipart form data with the supplied headers", async () => {
         csrf: request.headers.get("X-CSRF-TOKEN"),
         key: request.headers.get("Idempotency-Key"),
       };
-      return HttpResponse.json({ id: "a", managementStatus: "READY" }, { status: 201 });
+      return HttpResponse.json(dataEnvelope({ id: "a", managementStatus: "READY" }), { status: 201 });
     }),
   );
 
@@ -53,7 +61,7 @@ test("does not set content-type itself so the boundary survives", async () => {
   server.use(
     http.post(`${BASE}/api/v1/studio/assets`, ({ request }) => {
       contentType = request.headers.get("content-type");
-      return HttpResponse.json({ id: "a" }, { status: 201 });
+      return HttpResponse.json(dataEnvelope({ id: "a" }), { status: 201 });
     }),
   );
 
@@ -66,14 +74,13 @@ test("maps 413 onto PAYLOAD_TOO_LARGE", async () => {
   server.use(
     http.post(`${BASE}/api/v1/studio/assets`, () =>
       HttpResponse.json(
-        {
-          type: "https://techlog.local/problems/payload-too-large",
-          title: "PAYLOAD_TOO_LARGE",
-          status: 413,
-          detail: "파일이 너무 큽니다.",
+        errorEnvelope({
           code: "PAYLOAD_TOO_LARGE",
-        },
-        { status: 413, headers: { "content-type": "application/problem+json" } },
+          category: "VALIDATION",
+          message: "파일이 너무 큽니다.",
+          retryable: false,
+        }),
+        { status: 413 },
       ),
     ),
   );
@@ -92,14 +99,13 @@ test("maps 415 onto UNSUPPORTED_MEDIA_TYPE", async () => {
   server.use(
     http.post(`${BASE}/api/v1/studio/assets`, () =>
       HttpResponse.json(
-        {
-          type: "https://techlog.local/problems/unsupported-media-type",
-          title: "UNSUPPORTED_MEDIA_TYPE",
-          status: 415,
-          detail: "지원하지 않는 형식입니다.",
+        errorEnvelope({
           code: "UNSUPPORTED_MEDIA_TYPE",
-        },
-        { status: 415, headers: { "content-type": "application/problem+json" } },
+          category: "VALIDATION",
+          message: "지원하지 않는 형식입니다.",
+          retryable: false,
+        }),
+        { status: 415 },
       ),
     ),
   );
@@ -128,14 +134,15 @@ test("falls back to STUDIO_UNAVAILABLE for an uncontracted problem code instead
   server.use(
     http.post(`${BASE}/api/v1/studio/assets`, () =>
       HttpResponse.json(
-        {
-          type: "https://techlog.local/problems/teapot",
-          title: "IM_A_TEAPOT",
-          status: 418,
-          detail: "이 서버는 커피를 내릴 수 없습니다.",
+        // 봉투 뼈대는 정상이지만 `code`가 계약 밖이다 — envelope 검증은
+        // 통과하되(구조는 맞음) `apiErrorSchema`의 code enum에서 걸린다.
+        errorEnvelope({
           code: "IM_A_TEAPOT",
-        },
-        { status: 418, headers: { "content-type": "application/problem+json" } },
+          category: "INTERNAL",
+          message: "이 서버는 커피를 내릴 수 없습니다.",
+          retryable: false,
+        }),
+        { status: 418 },
       ),
     ),
   );
@@ -187,7 +194,7 @@ test("maps an aborted upload onto a non-retryable STUDIO_UNAVAILABLE", async ()
   server.use(
     http.post(`${BASE}/api/v1/studio/assets`, async () => {
       await new Promise((resolve) => setTimeout(resolve, 50));
-      return HttpResponse.json({ id: "a" }, { status: 201 });
+      return HttpResponse.json(dataEnvelope({ id: "a" }), { status: 201 });
     }),
   );
 

tests/features/tech-log/contract-generation.test.ts

@@ -18,7 +18,7 @@ test("vendored contract matches the recorded canonical digest", () => {
 
 test("canonical source records the pinned revision and version", () => {
   assert.equal(canonicalSource.packageId, "@tech-log/studio-contract");
-  assert.equal(canonicalSource.version, "2.0.0");
+  assert.equal(canonicalSource.version, "3.0.0");
   // revision은 생성 시점에 기록된다. canonical 저장소는 활발히 편집 중이므로
   // 특정 값을 박아두면 계약이 그대로인데도 테스트가 깨진다. 형식만 고정한다.
   assert.match(canonicalSource.sourceRevision, /^[0-9a-f]{7,64}$/);

tests/features/tech-log/mock-studio-gateway.test.ts

@@ -3,6 +3,8 @@ import { test } from "vitest";
 
 import { isStudioGatewayError } from "../../../src/features/tech-log/application/ports/studio-gateway-error.ts";
 import type {
+  ValidationErrorDetails,
+  VersionConflictDetails,
   WorkingCopy,
   WorkingCopyInput,
 } from "../../../src/features/tech-log/contracts/studio/contract.ts";
@@ -71,8 +73,11 @@ function isProblem(status: number, code: string, paths?: string[]) {
     assert.equal(error.status, status);
     assert.equal(error.code, code);
     if (paths) {
+      // wire와 같은 자리: `REQUEST_VALIDATION_FAILED`의 detail은
+      // `ValidationErrorDetails`로 `details`에 있다 (Task 3 fix round 1).
+      const details = error.problem.details as ValidationErrorDetails;
       assert.deepEqual(
-        error.problem.fieldErrors?.map(({ path }) => path),
+        details.fieldErrors.map(({ path }) => path),
         paths,
       );
     }
@@ -203,9 +208,8 @@ test("runtime OpenAPI validation enforces discriminators, extras, dates, UUIDs a
       }),
       (error) => {
         assert.ok(isStudioGatewayError(error));
-        assert.ok(
-          error.problem.fieldErrors?.some(({ path }) => path === pointer),
-        );
+        const details = error.problem.details as ValidationErrorDetails;
+        assert.ok(details.fieldErrors.some(({ path }) => path === pointer));
         return true;
       },
     );
@@ -575,12 +579,10 @@ test("publication history, immutable snapshots, conflict fixtures and 404 bodies
     (error) => {
       assert.ok(isStudioGatewayError(error));
       assert.equal(error.code, "VERSION_CONFLICT");
-      assert.deepEqual(error.problem.conflictingFields, [
-        "/title",
-        "/summary",
-      ]);
+      const details = error.problem.details as VersionConflictDetails;
+      assert.deepEqual(details.conflictingFields, ["/title", "/summary"]);
       assert.equal(
-        error.problem.latestDocument?.document.version,
+        details.latestDocument.document.version,
         conflict.document.version + 1,
       );
       return true;

tests/features/tech-log/studio-csrf-composition.test.ts

@@ -43,6 +43,16 @@ beforeAll(() => server.listen({ onUnhandledRequest: "error" }));
 afterEach(() => server.resetHandlers());
 afterAll(() => server.close());
 
+// wire format은 봉투다 (ADR-006) — 이 파일은 실제 platform 계약 런타임
+// (`createContractHttpExecutor`)을 조립하므로 `outputValidator`
+// (`envelopeData`)가 그대로 걸린다. 봉투가 아닌 본문은 SUCCESS_SCHEMA_INVALID로
+// 거절된다.
+const dataEnvelope = (data: unknown) => ({
+  success: true,
+  data,
+  meta: { requestId: "r", traceId: "t", correlationId: null, page: null },
+});
+
 function scopeSnapshot() {
   return Object.freeze({
     generation: 1,
@@ -152,13 +162,15 @@ test(
     server.use(
       http.get(`${BASE}/api/v1/studio/session`, () => {
         sessionCalls += 1;
-        return HttpResponse.json({
+        return HttpResponse.json(
+          dataEnvelope({
             authenticated: true,
             displayName: "테스터",
             roles: ["editor"],
             csrfToken: "csrf-token-1",
             csrfHeaderName: "X-CSRF-TOKEN",
-        });
+          }),
+        );
       }),
     );
 
@@ -166,10 +178,7 @@ test(
     server.use(
       http.get(`${BASE}/api/v1/studio/dashboard`, ({ request }) => {
         jsonRequestHeader = request.headers.get("x-csrf-token");
-        return HttpResponse.json({
-          documentTotals: {},
-          workflowSections: [],
-        });
+        return HttpResponse.json(dataEnvelope({ documentTotals: {}, workflowSections: [] }));
       }),
     );
 
@@ -177,7 +186,10 @@ test(
     server.use(
       http.post(`${BASE}/api/v1/studio/assets`, ({ request }) => {
         uploadRequestHeader = request.headers.get("X-CSRF-TOKEN");
-        return HttpResponse.json({ id: "a", managementStatus: "READY" }, { status: 201 });
+        return HttpResponse.json(
+          dataEnvelope({ id: "a", managementStatus: "READY" }),
+          { status: 201 },
+        );
       }),
     );
 
@@ -232,13 +244,15 @@ test(
     server.use(
       http.get(`${BASE}/api/v1/studio/session`, () => {
         sessionCalls += 1;
-        return HttpResponse.json({
+        return HttpResponse.json(
+          dataEnvelope({
             authenticated: true,
             displayName: "테스터",
             roles: ["editor"],
             csrfToken: `csrf-token-${sessionCalls}`,
             csrfHeaderName: "X-CSRF-TOKEN",
-        });
+          }),
+        );
       }),
     );
 
@@ -250,7 +264,7 @@ test(
         // Second call: succeeds with whatever token is presented.
         return dashboardHeaders.length === 1
           ? new HttpResponse(null, { status: 403 })
-          : HttpResponse.json({ documentTotals: {}, workflowSections: [] });
+          : HttpResponse.json(dataEnvelope({ documentTotals: {}, workflowSections: [] }));
       }),
     );
 
@@ -294,13 +308,15 @@ test(
     server.use(
       http.get(`${BASE}/api/v1/studio/session`, () => {
         sessionCalls += 1;
-        return HttpResponse.json({
+        return HttpResponse.json(
+          dataEnvelope({
             authenticated: true,
             displayName: "테스터",
             roles: ["editor"],
             csrfToken: `csrf-token-${sessionCalls}`,
             csrfHeaderName: "X-CSRF-TOKEN",
-        });
+          }),
+        );
       }),
     );
 
@@ -308,7 +324,7 @@ test(
     server.use(
       http.get(`${BASE}/api/v1/studio/dashboard`, ({ request }) => {
         dashboardHeaders.push(request.headers.get("x-csrf-token"));
-        return HttpResponse.json({ documentTotals: {}, workflowSections: [] });
+        return HttpResponse.json(dataEnvelope({ documentTotals: {}, workflowSections: [] }));
       }),
     );
     server.use(

tests/features/tech-log/studio-envelope-unwrap.test.ts

@@ -0,0 +1,42 @@
+import { describe, expect, it } from "vitest";
+import { envelopeData, envelopeError } from "../../../src/features/tech-log/contracts/tech-log-studio-contract-contribution.ts";
+
+describe("studio 봉투 언랩", () => {
+  it("성공 봉투에서 data를 꺼낸다", () => {
+    const result = envelopeData("getStudioSessionOutput").safeParse({
+      success: true,
+      data: { authenticated: true, displayName: "d", roles: [], csrfToken: "t", csrfHeaderName: "X-CSRF-TOKEN" },
+      meta: { requestId: "r", traceId: "t", correlationId: null, page: null },
+    });
+    expect(result.success).toBe(true);
+    if (result.success) expect(result.data).toMatchObject({ displayName: "d" });
+  });
+
+  it("봉투가 아닌 본문을 거절한다", () => {
+    const result = envelopeData("getStudioSessionOutput").safeParse({ displayName: "d" });
+    expect(result.success).toBe(false);
+  });
+
+  it("오류 봉투를 ProblemDetails 형태로 옮긴다", () => {
+    const result = envelopeError().safeParse({
+      success: false,
+      error: { code: "VERSION_CONFLICT", category: "CONFLICT", message: "conflict", retryable: false, details: null },
+      meta: { requestId: "r", traceId: "tr", correlationId: null, page: null },
+    });
+    expect(result.success).toBe(true);
+    if (result.success) {
+      expect(result.data.code).toBe("VERSION_CONFLICT");
+      expect(result.data.status).toBe(0);
+      expect(result.data.title).toBe("VERSION_CONFLICT");
+    }
+  });
+
+  it("계약 밖 코드를 거절한다", () => {
+    const result = envelopeError().safeParse({
+      success: false,
+      error: { code: "NOT_A_STUDIO_CODE", category: "INTERNAL", message: "x", retryable: false, details: null },
+      meta: { requestId: "r", traceId: "tr", correlationId: null, page: null },
+    });
+    expect(result.success).toBe(false);
+  });
+});