ChrisBeWithYouandClaude Fable 5 4db3db4622 v3 library: per-field pack overwrite (R4b) — fix wrong author values, with receipts
DRAFT — gated on the feedpak-spec §7 amendment (got-feedback/feedpak-spec#47).
Gap-fill (#724) fills absent keys; this fixes WRONG author-set values (a
typo'd artist, a wrong year) one field at a time, with provenance and an undo.
Built fully compliant with the amendment shape so it's ready the moment §7
is amended.

Server (extends the merged gap-fill endpoints, doesn't fork):
- Preview GET /api/song/{fn}/gap-fill now also returns `differs` =
  [{key, current, proposed}] over the allowlist (title/artist/album/year/
  genres) where the manifest HAS an author value and the confirmed match
  supplies a DIFFERENT one — plus `overwrite_allowed` (the Settings gate) and
  `has_backup`. differs is EMPTY unless match_state == 'manual': a
  user-confirmed pin can authorize a replace; an auto-match never can. mbid/
  isrc are never in differs (identity changes only via re-match).
- POST accepts `overwrite_keys` alongside gap-fill's `keys`; gated on the
  allow_pack_overwrite setting + manual state + the allowlist, proposals
  recomputed under _song_io_lock so a field that changed since preview is
  skipped. Writes via the re-serialize writer (extended to handle the genres
  list). Every written key (gap-fill AND overwrite) lands in a new write_log
  receipts table (filename, key, old, new, source, score, ts), pruned to the
  newest 5000 rows.
- POST /api/song/{fn}/revert-original restores the pack from its .bak (dir +
  zip forms), re-stats + re-syncs the DB; 404 when no backup; the .bak is
  PRESERVED after revert (re-appliable). Demo-blocked, like the write.
- GET /api/song/{fn}/write-log — the song's receipts, newest first.
- Setting allow_pack_overwrite (default OFF).

The .bak safety property is unchanged from the shipped writer: the backup is
written ONCE (first write) and is always the pristine author original — a
second overwrite never clobbers it, so Revert always returns the untouched
pack.

Frontend (Details drawer, extends the gap-fill block): when the preview
returns differs AND overwriting is enabled, an "Overwrite existing fields"
sub-block renders per-key rows `Artist: "ACDC" -> "AC/DC"`, ALL UNTICKED by
default, with the warning that it replaces what the author wrote and the
original is kept as a backup; the Write button carries the ticked keys. When
differs exist but the setting is off, one muted line points to Settings. A
"Revert file to original…" link (confirm dialog) appears whenever a backup
exists. Settings gains the allow_pack_overwrite checkbox.

Tests: tests/test_pack_overwrite.py — differs manual-only + identity-excluded
+ equal-skipped, refused when setting-off / not-manual / bad keys, dir + zip
overwrite, .bak stays the pristine original across a second write, write_log
records old+new (and gap-fills), prune at cap, revert dir+zip+404, demo
blocks write & revert. 30 pass with test_gap_fill green. node --check clean;
no new Tailwind classes.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Nm7tHs1Yvjjtnnu4nzJgdN
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fee[dB]ack

Plugins

Plugin Description Install
Create from Tab Search Ultimate Guitar for GP tabs and convert to playable songs git clone ...feedBack-plugin-ug.git ultimate_guitar
Import Tab Drag and drop Guitar Pro files to create songs git clone ...feedBack-plugin-tabimport.git tab_import
Practice Journal Auto-track practice time, speed, loops. Dashboard with charts git clone ...feedBack-plugin-practice.git practice_journal
Setlist Builder Create ordered playlists with sequential playback git clone ...feedBack-plugin-setlist.git setlist
Metronome Audible click and visual beat flash synced to song tempo git clone ...feedBack-plugin-metronome.git metronome
Tone Player View amp/pedal/cab signal chains with gear artwork git clone ...feedBack-plugin-tones.git tones
Fretboard View Live fretboard overlay showing active notes in real-time git clone ...feedBack-plugin-fretboard.git fretboard
Tab View Scrolling guitar tablature notation via alphaTab git clone ...feedBack-plugin-tabview.git tab_view
MIDI Amp Control Auto-switch amp/modeler presets via MIDI on tone changes git clone ...feedBack-plugin-midi.git midi_amp
Section Map Color-coded song structure minimap with clickable navigation git clone ...feedBack-plugin-sectionmap.git section_map
Arrangement Editor DAW-like visual editor for creating and editing song note charts git clone ...feedBack-plugin-editor.git editor
MIDI Capo MIDI capo control for real-time transposition git clone ...slopsmith-plugin-midi-capo.git midi_capo
Note Detection Real-time pitch detection and scoring against highway notes git clone ...feedBack-plugin-notedetect.git note_detect
Find More Search for more songs by the same artist git clone ...slopsmith-plugin-find-more.git find_more
Piano Highway Scrolling piano/keyboard view for Keys arrangements with MIDI input git clone ...feedBack-plugin-piano.git piano
Studio Collaborative band recording and multi-track mixing git clone ...feedBack-plugin-studio.git studio
Drum Highway Lane-based drum highway with MIDI drum pad input and built-in sounds git clone ...feedBack-plugin-drums.git drums
Invert Highway Flip the highway note direction git clone ...slopsmith-plugin-invert-highway.git invert_highway
Jumping Tab Yousician-style 2D horizontal tab with trajectory arcs and hopping ball git clone ...slopsmith-plugin-jumpingtab.git jumpingtab
Step Mode Step-by-step practice mode — highway freezes at each note until played (via Note Detection) or Space git clone ...feedBack-plugin-stepmode.git step_mode
Lyrics Sync Generate synced LRC lyrics from text + vocals stem via Whisper alignment git clone ...feedBack-plugin-lyrics-sync.git lyrics_sync
Lyrics Karaoke Per-syllable karaoke pitch ribbon for sloppak songs (Whisper alignment + librosa pYIN) git clone ...feedBack-plugin-lyrics-karaoke.git lyrics_karaoke
NAM Tone Engine In-browser amp modeling with NAM WASM, cabinet IRs, tone auto-switching git clone ...feedBack-plugin-nam-tone.git nam_tone
Guitar Theory Lab Explore scales, chords, intervals, tunings, and voicings on a fully interactive fretboard git clone ...slopsmith-plugin-guitar-theory.git guitar-theory-lab
Themes Offers several basic recolorings of the interface git clone ...slopsmith-plugin-themes.git themes
Update Manager Installs, updates, and uninstalls other plugins and the feedBack core itself git clone ...slopsmith-update-manager.git update_manager
Simplify Chords Changes complex chords on the note highway to simpler ones. Inspired by Ultimate Guitar's Simplify button. git clone ...slopsmith-plugin-simplify-chords.git simplify-chords
Key Bindings Highway key bindings for keyboard and TV remote git clone ...slopsmith-plugin-key-bindings.git key_bindings
Virtuoso Practice studio for guitar & bass — scale, technique, and rhythm drills, timed workouts, and jam backing that teach skills you take off the screen. git clone ...feedBack-plugin-virtuoso.git virtuoso
Audio Preview Quick audio previews from library cards with configurable start time, volume, and duration git clone ...slopsmith-plugin-audio-preview.git audio_preview
Song Mastery Auto-adjusts difficulty based on your rolling note accuracy and saves the slider position per song git clone ...slopsmith-plugin-song-mastery.git song_mastery
Mobile Note Highway Touch-optimized player with collapsible controls, highway gestures, and device-adaptive layouts for phones and tablets git clone ...slopsmith-plugin-mobile-note-highway.git mobile_note_highway

Install any plugin by cloning it into your plugins/ directory and restarting:

cd plugins
git clone https://github.com/got-feedback/feedBack-plugin-ug.git ultimate_guitar
docker compose restart
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