- mcp/server.mjs : search, suggest, details, trending, transcript, transcript_text, health_check (client fin vers API REST) - docs/API_MCP_GUIDE.md : reference complete REST + MCP + transcript - tests : server/tests/api_coverage.test.mjs (17 cas HTTP), mcp/tools.test.mjs (7 outils sur stub), scripts test:mcp/test:api - fix(db): DELETE playlist 500 FK -> metrique avant delete + cleanup enfants + recordPlaylistMetric tolerant (observabilite)
- InnerTube layer via pinned youtubei.js 18.1.0 (no quota, no key): search with merged continuations (unlimited pages), watch-next related with LockupView mapping, caption-track discovery - 3-layer dispatcher (YT_SEARCH_MODE, default innertube-first): innertube -> yt-dlp scrape -> official API, graceful errors.yt - Robust yt-dlp binary resolution (YT_DLP_PATH > PATH > bundled) with systematic API fallback (fixes spawn ENOENT in UI) - Transcript: InnerTube caption discovery (YT_TRANSCRIPT_SOURCE), reusing pickTrack/orderedTracks/parseTrackText; yt-dlp fallback kept - Watch: sidebar uses real watch-next related[] (/api/details), title-search fallback for other providers - Cache: memory LRU + SQLite (youtube_search_cache, youtube_metrics), never persist empty pages; /healthz observability; /api/trending - Includes pending Step 15/16 leftovers in same files (suggest, test scripts); unrelated provider adapters left uncommitted