bvandeusen
65dd132b3d
Milestone #160 Opt 3 (temporal half). A new additive scoring term that boosts a candidate when its artist's play history concentrates in the CURRENT daypart × weekday-type cell, in the user's local timezone. - Migration 0046: recommendation_weight_profiles.context_time_weight (per-profile scoring weight, DEFAULT 1.0). - Query ListArtistContextPlayCountsForUser: per-artist completed-play counts split by the current cell (daypart night[22,5)/morning[5,12)/ afternoon[12,17)/evening[17,22) × weekday-vs-weekend) via started_at AT TIME ZONE users.timezone; 365-day window, skips excluded. - internal/recommendation/context.go: LoadContextAffinity computes each artist's shrunk cell-share minus the user's baseline share, clamped to [-1,1]; sparse artists shrink toward baseline (pseudo-count 5), unknown artists → 0 (cold-start neutral). - Score() gains context_affinity_score · ContextTimeWeight; both candidate loaders set it per candidate. - Tuning lab: ContextTimeWeight threaded through recsettings + admin API + web card ("Time-of-day weight" row) + Go/web tests. Shipped 1.0 both profiles (uniform start, re-bakeable). Device-class axis deferred to #1551 (needs a client_id → device-class mapping that doesn't exist yet). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
13 lines
822 B
SQL
13 lines
822 B
SQL
-- 0046_context_time_weight.up.sql — time-of-day/weekday context conditioning
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-- (#1531, milestone #160 Opt 3). Adds a per-profile scoring weight for the new
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-- context-affinity term: how strongly a candidate is boosted when its artist's
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-- play history concentrates in the current daypart × weekday-type cell (in the
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-- user's local timezone). Mirrors the other ScoringWeights columns.
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--
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-- DEFAULT 1.0 backfills both existing profile rows to a modest on-value; the
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-- Go ShippedRadioWeights/ShippedDailyMixWeights carry the same 1.0 so fresh
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-- installs seed identically. Reconcile only seeds MISSING rows (ON CONFLICT DO
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-- NOTHING), so existing rows rely on this DEFAULT until an operator resets.
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ALTER TABLE recommendation_weight_profiles
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ADD COLUMN context_time_weight double precision NOT NULL DEFAULT 1.0;
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