Integration Summary

Static integration review completed without executing the server, per the generation-only harness.

Endpoints

• POST /api/users — 201; validation or duplicate conflicts use 422.
• POST /api/users/login — 200; invalid credentials use 422.
• GET /api/user — 200; missing or invalid authentication uses 401.
• PUT /api/user — 200; missing or invalid authentication uses 401.
• GET /api/profiles/:username — 200; missing profiles use 404.
• POST /api/profiles/:username/follow — 200; missing authentication uses 401.
• DELETE /api/profiles/:username/follow — 200; missing authentication uses 401.
• GET /api/articles — 200; invalid pagination uses 422.
• GET /api/articles/feed — 200; missing authentication uses 401.
• GET /api/articles/:slug — 200; missing articles use 404.
• POST /api/articles — 201; missing authentication uses 401.
• PUT /api/articles/:slug — 200; non-authors use 403.
• DELETE /api/articles/:slug — 204; non-authors use 403.
• POST /api/articles/:slug/favorite — 200; missing authentication uses 401.
• DELETE /api/articles/:slug/favorite — 200; missing authentication uses 401.
• GET /api/articles/:slug/comments — 200; missing articles use 404.
• POST /api/articles/:slug/comments — 201; missing authentication uses 401.
• DELETE /api/articles/:slug/comments/:id — 204; non-authors use 403.
• GET /api/tags — 200.

Layer and Error Review

All route handlers delegate to services, and no route file directly accesses Prisma. Error responses use the {"errors":{"body":["message"]}} shape. Article list, feed, and tag routes were hardened so repository failures also produce the specified error envelope.