Claude/pensive pascal pe ng r - #74
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Add an end-to-end watchlist feature and substantially broaden the recommendation algorithm's inputs. Watchlist: - new watchlist table + toggle/status/getWatchlist tRPC endpoints - detail-page toggle button, home 'My list' rail, i18n (fr/en/de) - WATCHLIST_ADD/REMOVE analytics events; watchlist folded into the genre taste model and used as a positive affinity signal in scoring New signals fed into the algorithm (scoreCandidateWithProfile): - likes / dislikes (strengthened), watchlist affinity - per-title abandonment curve (normalized deciles), effective completion (>75%), sessions-to-finish, impression/hover click-through — via a new cross-user media_stats table + mediaStatsEngine - active vs idle playback time - impressions-without-click and hover-without-open - collection / saga, keywords / themes, director / composer, age rating, popularity / novelty (new TMDB-enriched media columns) - genre x moment (weekday x daypart affinity) - binge / session detection + co-viewing capture - seasonality (month buckets) and churn (gaps, reactivations) Data model: - media: keywords, director, composer, certification, popularity - new tables watchlist, media_stats (idempotent migrations) - TMDB enrichment for keywords, crew, certification, popularity Docs: docs/recommendation-algorithm.md documents every signal and lists proposed future improvements (cold-start, recency decay, diversity/MMR, score normalization, offline eval, etc.). https://claude.ai/code/session_01RF3jY6P1ySdMQzuv97NFtL
Document the signals added in this PR that are now observed and fed into the recommendation algorithm: explicit watchlist, per-title playback quality (abandonment curve, effective completion >75%, sessions-to-finish, impression/ hover CTR), active vs idle time, content metadata (collection, keywords, director, composer, certification, popularity, novelty), genre x moment, seasonality, churn, and binge/co-viewing. https://claude.ai/code/session_01RF3jY6P1ySdMQzuv97NFtL
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