Root cause of the flaky pytest segfault (exit 139): the background scan and enrichment daemon threads (_scan_runner/_enrich_runner) use the shared MetadataDB connection, but test fixtures closed that connection in teardown without stopping them. A daemon thread mid-query on a freed SQLite conn is a native use-after-free → SIGSEGV. The app's startup kicks a scan, so almost any app-booting fixture was vulnerable. It only surfaced now because got-feedback/feedBack#728 added a push trigger, so ci/test runs on every push to main.
Fix: server.py retains the scan/enrich thread handles and adds _join_background_db_threads(); every test fixture now joins the workers before conn.close(). Verified: the full suite runs to completion (no segfault) where it previously crashed at ~25%.
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* v3 library: growth-edge "practice next" recommender — P3
The "Keep practicing" shelf stops being recency-only: a new GET
/api/library/practice-suggestions ranks started-but-unmastered songs by
difficulty-appropriateness x mastery-proximity (the growth edge - the
mid-difficulty, closest-to-mastery material where practice pays off
fastest), and the shelf sources it instead of filtering /api/stats/recent.
- Score = difficulty band fit (your 1-5 rating; unrated degrades to the
middle band so the shelf works before any ratings exist) x proximity
to the 0.9 mastery threshold. Read-only - never writes difficulty.
- A shelf click opens the closest-to-mastery arrangement.
- Per-arrangement difficulty and seed-from-authored intentionally NOT
faked: there is no authored/derived difficulty on songs yet (the
feedpak difficulty spec is unmerged) and the personal rating is
per-song - both revisit when that field lands.
9 endpoint tests. tailwind.min.css regenerated (generated file - on a
merge conflict, re-run scripts/build-tailwind.sh).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Nm7tHs1Yvjjtnnu4nzJgdN
* fix(v3): deterministic tiebreak (filename) in practice-next ordering (PR #704 review)
Add r["filename"] as the final sort component so suggestions with equal
growth_score and equal/None last_played_at order deterministically instead
of by SQLite's unordered agg.items() scan.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
Co-authored-by: byrongamatos <xasiklas@gmail.com>
