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+---
+name: soundlog-api-contract-sync
+description: Soundlog에서 front-first로 만든 기능의 API 계약을 추출하고, SoundLogTeam/api-docs OpenAPI 문서와 SoundLogServer DTO/validator/service에 반영하는 워크플로우. Use when the user asks to update API docs from frontend/mock work, sync backend DTOs, reflect frontend-first changes into server, or keep SoundLogTeam/api-docs current.
+---
+
+# Soundlog API Contract Sync
+
+## Goal
+
+Keep three surfaces aligned:
+
+1. `SoundLogApp`: `src/api`, `src/mock-server`, `src/types/domain`, screens/hooks
+2. `SoundLogTeam/api-docs`: `openapi/soundlog-api.yaml`
+3. `SoundLogServer`: routes, validators, DTO/service responses, seed/mock data
+
+Use this when a feature was built front-first and backend/API contracts must catch up.
+
+## Required Workflow
+
+1. **Update local main branches**
+   - In `SoundLogApp`, pull latest `main`.
+   - In sibling repos `../api-docs` and `../SoundLogServer`, pull latest `main` when present.
+   - Never push directly to SoundLogApp `main`; create a `codex/` branch for app changes.
+
+2. **Extract frontend contract**
+   - Inspect changed or relevant files:
+     - `src/api/*Api.ts`, `src/api/*Queries.ts`
+     - `src/mock-server/types.ts`, `src/mock-server/*Handlers.ts`
+     - `src/types/domain.ts`
+     - affected screens under `app/` and `src/components/`
+     - local stores that create payloads, especially recommendation/library/moment/session stores
+   - Classify each contract as `new`, `changed`, `removed`, or `frontend-only`.
+
+3. **Write API contract**
+   - Update `../api-docs/openapi/soundlog-api.yaml`.
+   - Use `templates/endpoint-contract.md` when drafting a new endpoint.
+   - Keep request/response names stable and backend-friendly.
+   - Include empty/error states when frontend depends on them.
+
+4. **Reflect backend DTO**
+   - Update `../SoundLogServer/src/validators/api.validators.ts` for request/query/body shape.
+   - Update service DTO response mapping in `src/services/soundlog.service.ts` and `src/services/mock-soundlog.service.ts`.
+   - Update seed/mock data only when frontend requires concrete demo behavior.
+   - Avoid Prisma migrations unless the contract truly needs persistence.
+
+5. **Review**
+   - Use `references/frontend-contract-extraction.md` and `references/backend-dto-handoff.md`.
+   - Check that backend can implement from docs without reading frontend code.
+   - Check that frontend can consume server responses without additional mapping surprises.
+
+6. **Verify**
+   - App docs/skill-only changes: `git diff --check`
+   - API docs: YAML structure smoke check and `git diff --check`
+   - Server: `pnpm run typecheck` or `npm run typecheck` depending on repo scripts, plus tests if DTO behavior changed
+
+## Output Expectations
+
+Report separately:
+
+- App skill or contract extraction changes
+- API docs changes
+- Server DTO/validator/service changes
+- Verification commands
+- Any unresolved backend implementation risk
+
+## Guardrails
+
+- Do not invent backend fields only for UI decoration; mark them frontend-only or derive them in a mapper.
+- Keep `TravelMode` and `MusicRecommendationMode` distinct.
+  - `TravelMode`: walk, drive, cafe, ocean, festival, night
+  - `MusicRecommendationMode`: everyday, travel
+- If an app mock response has extra fields, either document them or explicitly call them frontend-only.
+- If `api-docs` and server disagree, treat `api-docs` as the handoff contract and update server to match.
diff --git a/.codex/skills/soundlog-api-contract-sync/references/backend-dto-handoff.md b/.codex/skills/soundlog-api-contract-sync/references/backend-dto-handoff.md
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+# Backend DTO Handoff
+
+Use this checklist before saying backend DTO reflection is complete.
+
+## DTO Review
+
+- Request DTO has all frontend params/body fields.
+- Response DTO contains all fields consumed by screens.
+- Optional fields are genuinely optional in frontend rendering.
+- Enums match frontend string values exactly.
+- Server validation accepts comma-separated query arrays when frontend/API docs use CSV.
+- Server response envelope matches OpenAPI: `{ data }` for single/list unless paginated.
+- Paginated lists return `{ data, page }`.
+
+## Server Files
+
+- `src/routes/index.ts`: endpoint exists and method/path matches OpenAPI.
+- `src/validators/api.validators.ts`: query/body/params match OpenAPI.
+- `src/services/soundlog.service.ts`: real DB DTO mapping matches response schema.
+- `src/services/mock-soundlog.service.ts`: mock DB mode matches the same schema.
+- `src/data/seed-data.ts`: demo data exists when UI needs meaningful local verification.
+- `prisma/schema.prisma`: update only when persistence truly requires a new column/table.
+
+## Review Prompt
+
+Ask: "Can a backend developer implement this from `api-docs` without opening the frontend repo?"
+
+If no, add descriptions, examples, enum notes, or nullable behavior to `openapi/soundlog-api.yaml`.
diff --git a/.codex/skills/soundlog-api-contract-sync/references/frontend-contract-extraction.md b/.codex/skills/soundlog-api-contract-sync/references/frontend-contract-extraction.md
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+# Frontend Contract Extraction
+
+Use this checklist when extracting API needs from SoundLogApp.
+
+## Read Order
+
+1. Screen entry under `app/`
+2. Query hooks under `src/api/*Queries.ts`
+3. API facade under `src/api/*Api.ts`
+4. Mock handler and mock params under `src/mock-server`
+5. Domain types under `src/types/domain.ts`
+6. Event/local stores that create server payloads
+
+## Contract Questions
+
+- Which screen or user flow needs this data?
+- Is the data currently query-backed, mock-backed, or local-store only?
+- Is the field persisted by backend or derived by frontend?
+- What happens when the response is empty?
+- What happens when nullable fields are missing?
+- Are enum values Korean labels or stable English identifiers?
+- Does the frontend send a full object in mock mode that must become IDs/query params in HTTP mode?
+
+## Common Soundlog Decisions
+
+- `MusicRecommendationMode` is a recommendation scope toggle: `everyday | travel`.
+- `TravelMode` is a trip/activity context: `walk | drive | cafe | ocean | festival | night`.
+- `MoodRecommendation.playlistId` is optional. If absent, app can play the embedded `track`.
+- TourAPI raw fields should not leak to app DTOs; normalize to `PlaceContext`.
diff --git a/.codex/skills/soundlog-api-contract-sync/templates/endpoint-contract.md b/.codex/skills/soundlog-api-contract-sync/templates/endpoint-contract.md
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+# Endpoint Contract Template
+
+## Endpoint
+
+- Method:
+- Path:
+- Frontend caller:
+- Screen/user flow:
+- Auth:
+
+## Request
+
+- Path params:
+- Query params:
+- Body:
+- Headers:
+
+## Response
+
+- DTO name:
+- Required fields:
+- Optional fields:
+- Empty state:
+
+## Backend Notes
+
+- Derived fields:
+- Persistence needed:
+- Mock/seed data needed:
+- Error cases:
diff --git a/.codex/skills/soundlog-korean-commit-pr/SKILL.md b/.codex/skills/soundlog-korean-commit-pr/SKILL.md
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+---
+name: soundlog-korean-commit-pr
+description: Soundlog 저장소에서 커밋, 푸시, PR 생성, PR 제목/본문 정리를 한국어로 일관되게 수행하는 워크플로우. Use when the user asks to commit, push, create or update a PR, check PR titles, standardize commit/PR wording, or prepare Korean pull requests for SoundLogApp, api-docs, or SoundLogServer.
+---
+
+# Soundlog Korean Commit PR
+
+## Goal
+
+Soundlog 관련 저장소의 변경사항을 안전하게 커밋하고, 한국어로 읽히는 PR을 만든다.
+
+대상 저장소:
+
+- `SoundLogApp`
+- `SoundLogTeam/api-docs`
+- `SoundLogServer`
+
+## Required Workflow
+
+1. **상태 확인**
+   - `git status --short --branch`로 현재 브랜치와 변경 파일을 확인한다.
+   - `git diff --stat`과 필요한 diff를 읽고, 요청 범위 밖의 변경은 stage하지 않는다.
+   - `main` 또는 보호 브랜치에 있으면 `codex/` 브랜치를 만든다.
+
+2. **검증**
+   - 코드 변경이면 가능한 가장 가까운 검증 명령을 실행한다.
+   - 문서/스킬 변경이면 최소 `git diff --check`를 실행한다.
+   - 실행하지 못한 검증은 PR 본문과 최종 응답에 이유를 적는다.
+
+3. **커밋**
+   - 커밋 메시지는 반드시 한국어 요약으로 작성한다.
+   - 형식: `<type>: <한국어 요약>`
+   - 허용 prefix:
+     - `feat:` 기능 추가 또는 사용자 경험 변화
+     - `fix:` 버그 수정
+     - `docs:` 문서, 스킬, API 명세 변경
+     - `refactor:` 동작 유지 리팩터링
+     - `test:` 테스트 추가/수정
+     - `chore:` 설정, 정리, 유지보수
+     - `build:` 빌드/패키지 변경
+     - `ci:` CI/CD 변경
+   - 예시:
+     - `docs: 한국어 커밋 PR 스킬 추가`
+     - `feat: 추천 모드 DTO 계약 반영`
+     - `fix: 웹 권한 모듈 로딩 오류 수정`
+
+4. **푸시**
+   - 현재 작업 브랜치만 push한다.
+   - `SoundLogApp`의 `main`에는 절대 직접 push하지 않는다.
+
+5. **PR 생성 또는 갱신**
+   - 기존 PR이 있으면 새 PR을 만들지 말고 해당 PR을 갱신한다.
+   - PR 제목은 반드시 한국어 conventional 스타일로 쓴다.
+   - 단일 커밋 PR이면 PR 제목은 커밋 제목과 맞추는 것을 기본값으로 한다.
+   - 여러 변경이 섞이면 가장 큰 목적을 제목에 둔다.
+
+6. **PR 제목 검수**
+   - PR 생성/수정 후 `gh pr view ... --json title,body,url`로 실제 제목을 다시 확인한다.
+   - 제목이 영어만 있거나 범위가 틀리거나 변경 내용을 충분히 대표하지 못하면 `gh pr edit --title`로 수정한다.
+
+## PR Body Template
+
+PR 본문은 한국어로 작성하고, 저장소 템플릿이 없으면 아래 구조를 사용한다.
+
+```markdown
+## 작업 내용
+- 변경한 핵심 내용을 2~4개로 요약
+
+## 검증
+- 실행한 명령 또는 확인한 항목
+
+## 참고
+- 리뷰어가 알아야 할 제약, 미실행 검증, 연관 PR
+```
+
+## Multi-Repo PR Rules
+
+`SoundLogApp`, `api-docs`, `SoundLogServer`를 함께 수정할 때는 각 PR 본문에 연관 PR을 남긴다.
+
+- 앱 PR: API 문서/서버 PR이 함께 필요한지 적는다.
+- API 문서 PR: 기준이 된 프론트 변경 또는 서버 반영 PR을 적는다.
+- 서버 PR: 어떤 API 문서 계약을 반영했는지 적는다.
+
+## Quality Bar
+
+- 제목만 보고도 변경 목적이 보여야 한다.
+- PR 본문은 파일 목록이 아니라 리뷰 관점의 요약이어야 한다.
+- 검증 결과는 실제 실행한 명령 그대로 적는다.
+- 실패하거나 생략한 검증은 숨기지 않는다.
+- 관련 없는 변경이 섞였으면 커밋 전에 분리한다.