799dab029a0f164c92dd3947384ee570c0efaf95
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Commits
| Author | SHA1 | Message | Date | |
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  bvandeusenandClaude Opus 5
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799dab029a |
feat(discover): rank suggestions by taste-tag overlap — #2377 (server)
The payoff slice. Until now a candidate's only claim on a slot was "some
artist you play is adjacent to it in a similarity graph" — a fact that says
nothing about whether the music sounds like anything you like. Now the
candidate's own folksonomy tags (cached by slice 5) are compared against
the user's taste-profile tags, so the deck ranks on taste and can say WHY.
The blend is MULTIPLICATIVE — score × (1 + weight × overlap) — and that
choice carries the whole safety argument:
- An untagged candidate has overlap 0, so its score is EXACTLY unchanged.
Tag coverage is permanently partial (#2376); it must cost a candidate
nothing, not sink it (rule #131).
- Nothing can leapfrog on tags alone. An additive term with a large
weight would let a near-zero-similarity artist outrank a strong match
for sharing one popular tag, which reads as noise.
- Weight 0 restores pure similarity order bit-for-bit, so the operator's
knob has a real off position.
overlap = Σ(shared) candWeight × normalizedTasteWeight ÷ Σ(all) candWeight.
Normalizing the taste side by the user's strongest tag makes the score
comparable across users (taste weights accumulate with listening, so a
heavy listener's raw numbers dwarf a new user's while meaning the same
thing). Dividing by the candidate's own mass makes it comparable across
candidates, so a densely-tagged artist can't win on tag count alone.
Applied to the whole over-fetched pool BEFORE selectSuggestions, so the
rotation and diversity rules operate on blended scores — boosting only the
twelve already chosen by similarity would leave the re-ranking undone.
A query failure is returned, NOT degraded past. Graceful degradation is
for expected absence (no taste profile, no cached tags) and both are
handled explicitly as empty inputs; swallowing a real error would hide a
broken DB behind a subtly worse ranking that nothing reports.
Migration 0051 adds a FOURTH tuning scope rather than columns on
taste_tuning, because snooze_days lives here too and a snooze must never
be read as taste signal (#2374) — filing it under 'taste' would put it one
careless join from the leak that design forbids. Expanding
recommendation_tuning_audit's CHECK is in the same migration per rule #36,
and a test asserts the audit row lands, which is what would catch its
absence.
snooze_days moves out of a Go constant onto the tuning card (rule #25),
closing the deferral from #2374.
Tag-overlap tests use deliberately SKEWED fixtures: an evenly-matching pool
cannot exercise a re-ranking, since every candidate gets the same
multiplier and the order is unchanged whether the blend works or not.
Admin UI + client attribution follow in this batch — rule #27.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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bvandeusenandClaude Opus 5
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86af79bd2f |
feat(discover): time-boxed suggestion snooze, server side — #2374
Migration 0049 adds suggestion_snoozes(user_id, candidate_mbid, candidate_name, snoozed_until), and SuggestArtistsForUser excludes rows whose snooze hasn't expired. This is NOT a dislike. Rule #101 forbids a "Not for me" / thumbs-down UI; a snooze is the approved shape instead because it records no verdict on the music, expires on its own (~90d), and never reaches the taste profile. It's acquisition triage — "not right now" — so the filter sits at the candidate stage rather than in the score, where it would become a ranking signal by the back door. Per-user throughout (rule #47): one household member parking a candidate leaves everyone else's deck untouched. candidate_name is denormalized because suggestions are out-of-library by definition — there is no artists row to resolve a display name from, and the un-snooze list has to show something. That list is why GET /discover/snoozes exists at all: a parked candidate is by definition absent from the deck, so without it the DELETE would be unreachable. Also fixes a hole in the codegen check from #2380: `git diff` ignores untracked paths, so a brand-new generated file would have passed it silently. `git add -N` first. This commit is the first to add one. Endpoints: POST /api/discover/suggestions/{mbid}/snooze (body: name, days) DELETE /api/discover/suggestions/{mbid}/snooze GET /api/discover/snoozes UI lands in slice 4 (#2375) before any of this merges — rule #27. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> |
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bvandeusenandClaude Opus 5
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14aa22198f |
feat(discover): seed request suggestions from the taste profile — #2372
The Discover request surface was the one recommendation surface still on its M5c implementation from early May. #796's taste profile, #1488's taste_unheard bucket and #1490's folksonomy enrichment all modernized in-library surfaces; this one was never in scope for any of them, so it still projected raw likes + plays through artist_similarity_unmatched. Two defects fall out of that signal, `5*liked + Σexp(-age/halflife)` summed over every play of the artist. It is unbounded, and contribution is signal × similarity — so a handful of heavily-played artists monopolize all twelve slots, and their share GROWS the more the user listens. The surface entrenched harder the better it knew you, which is exactly backwards and matches the reported "goes stale once it has a strong signal of your taste". It also counted every play_event with no was_skipped filter, so skipping an artist repeatedly INCREASED its signal and pushed more of its neighbours at the user. ListMostPlayedTracksForUser and the taste engine both filter skips; this query was the odd one out. Seeds now come from taste_profile_artists.weight, which the taste engine has already engagement-graded, time-decayed and signed — an artist the user drifted away from stops contributing instead of accumulating forever, and can even contribute negatively. Tiered per rule #131 rather than hard-switched: tier 1 is the profile, tier 2 is likes + completed plays for a user who has no profile rows yet (new account, or before the first daily recompute), so the surface never empties. The old unfiltered-play signal is gone, not kept behind a toggle. The signal is also log-damped, so one artist cannot take every slot even when its weight dwarfs the rest. $2 stays wired to the tier-2 decay: it is genuinely still used there, and dropping the parameter would have changed the generated signature. sqlc's image is not on this workstation and the change preserves the query signature exactly — same three params, same seven columns — so only the embedded SQL const moves. Both copies are edited and verified byte-identical rather than pulling a container onto the operator's machine; a malformed query fails the integration lane loudly, which is the real check either way. Four integration tests cover what changed: a taste weight alone seeds with no like or play; tier 2 does not run alongside tier 1; a non-positive weight never seeds (guarded by a second positive row, so an empty tier 1 can't make it pass for the wrong reason); and skip-only history seeds nothing. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> |
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bvandeusenandClaude Opus 4.7
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277898a49a |
feat(recommendation): SuggestArtists service for M5c
Add per-user artist-suggestion service ranking out-of-library MBIDs by signal x similarity. Single-CTE SQL collects user likes (5x weight) and recency-decayed plays, joins against artist_similarity_unmatched, and filters in-library candidates plus non-terminal lidarr_requests. The service resolves top-3 attribution seeds to artist names in a batched GetArtistsByIDs call so the UI can render "because you liked X" reasons. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> |