Discovery seeded only from followed artists. Now it also seeds from artists
you own albums by (LibraryItem.artistMbid, captured since the MBID own-state
work) but don't follow — so your library shapes suggestions, not just your
follows.
- New DiscoverySeed throttle table (migration add_discovery_seed) mirroring
WatchedArtist.lastDiscoveredAt, so each library-derived seed is swept once
per interval (WatchedArtist seeds keep their own throttle).
- _seed_artists merges both seed sources least-recently-swept first, capped at
chunk_size; run_discovery stamps the right throttle per seed and evicts
contributions from seeds that are neither followed nor owned.
- Artists you already have (followed OR owned) are excluded from the suggestion
candidates — discovery surfaces only genuinely new artists.
- discover.seedFromLibrary config (default true) + a Discovery settings toggle.
NOTE: existing LibraryItem rows have null artistMbid (populated on new
import/scan), so a re-scan is needed before old albums seed discovery.
worker 236, web 187 tests.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
_record_contributions now normalizes each source's top-N to [0,1] by its own
top score before summing across sources. ListenBrainz co-occurrence counts
(thousands) no longer drown Last.fm's 0–1 match scores, so a small-scale
source contributes real ranking signal instead of only adding candidates.
Discovery score assertions updated to the normalized scale (single-candidate
fakes normalize to 1.0); added a cross-source test showing a small-scale
source's candidate ranks equal to a large-scale one. min_score is now on the
[0, n_sources] scale (default 0.0 → unaffected). worker 231 tests.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Discovery's "Suggested albums" surfaced singles and EPs because
_derive_albums filtered with is_core_release (Album/Single/EP). Add a
discovery-only _album_kind_ok gate that, when discover.albumsOnly (new
config, default true), requires primary_type == "Album" with no secondary
types. is_core_release is untouched — the monitor/scan still use it.
Exposed discover.albumsOnly in the discover config route + a Discovery
settings toggle. Worker + web tests added.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Two row-leak bugs found in whole-branch review:
- discovery.run_discovery now prunes DiscoverySeedContribution rows whose
seedMbid is no longer a WatchedArtist (unfollow/removal has no FK cascade)
and recomputes the touched candidates' scores this sweep, instead of
letting a dead seed's contribution inflate the aggregate forever.
- maybe_run_scan's exception handler around scan_chunk now calls
clear_worklist and clears scan.id, matching the drain path. Previously
an exception mid-chunk left the already-done rows plus the remaining
worklist for that scan_id orphaned forever, since the next scan mints a
fresh uuid. Also clear scan.id in the build_worklist failure handler for
consistency.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Reconciled the pre-existing test_config_from_config_parses_and_defaults
test in test_discovery.py, which referenced max_seeds/maxSeeds and would
otherwise have broken.
Adds registry.build_similarity_sources() (always constructs
ListenBrainzSource; reachability is a per-run health() concern, not a
startup gate) and wires discovery into the worker's main loop: a
scheduled sweep gated on discover.enabled + DISCOVER_TICK_SECONDS, and
a one-shot discover.requested trigger mirroring the existing
scan.requested pattern.
Also hardens run_discovery's health-check pass: a source whose
health() raises is now logged and skipped instead of aborting the
whole sweep (accepted finding from the Task-3 review).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Jonathan