bvandeusen
7226dab9ff
The 2-week metrics review found Discover beating the manual baseline on skip rate — which for a discovery surface means it plays it safe. On a single-user server it's effectively dormant + crude-random, and the per-user taste profile (taste_profile_tags, #796) went unused (#1254 gap). Add a fourth Discover candidate bucket, ListTasteUnheardTracksForDiscover: unheard / non-liked / non-quarantined tracks ranked by summed taste-tag weight over tracks.genre (split like the radio tag_overlap arm), md5 tiebreak. Its picks are stamped pick_kind = 'taste_unheard' (migration 0041 widens the CHECK on playlist_tracks + play_events, rule #36). Rebalance the slot allocation 40/30/30 → taste_unheard 35 / dormant 30 / cross_user 20 / random 15, and lead the interleave with taste_unheard so a track shared with another bucket keeps the taste stamp and the targeted-novelty arm stays measurable. Metrics label "Taste-matched" + order entry added to the single server-side pickKindLabels map, so web and Android surface the new breakdown row with no client change. Cold start (empty taste_profile_tags) yields an empty taste bucket that redistributes to the survivors, so Discover still fills. Scribe #1488. Companion review outcomes: Songs-like starvation already fixed (#1255); For You v2 ratified as-is (fresh-injection cost disproven). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
28 lines
1023 B
SQL
28 lines
1023 B
SQL
-- Reverse 0041_discover_taste_unheard.up.sql.
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--
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-- Null out any rows stamped with the new value before shrinking the
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-- CHECK back to the 0039 vocabulary, or the ADD CONSTRAINT would fail
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-- on existing 'taste_unheard' rows (mirrors 0039's down).
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UPDATE play_events SET pick_kind = NULL WHERE pick_kind = 'taste_unheard';
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UPDATE playlist_tracks SET pick_kind = NULL WHERE pick_kind = 'taste_unheard';
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ALTER TABLE playlist_tracks
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DROP CONSTRAINT playlist_tracks_pick_kind_check;
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ALTER TABLE playlist_tracks
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ADD CONSTRAINT playlist_tracks_pick_kind_check
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CHECK (pick_kind IN (
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'taste', 'fresh',
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'dormant', 'cross_user', 'random',
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'tier1', 'tier2', 'tier3'
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));
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ALTER TABLE play_events
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DROP CONSTRAINT play_events_pick_kind_check;
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ALTER TABLE play_events
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ADD CONSTRAINT play_events_pick_kind_check
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CHECK (pick_kind IN (
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'taste', 'fresh',
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'dormant', 'cross_user', 'random',
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'tier1', 'tier2', 'tier3'
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));
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