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Implement MIDI Studio V2 song architecture lane with classification, musical sections, sequence builder, timeline colors, export ownership, and unwired roadmap visibility - PR_26146_072-080-midi-studio-v2-song-architecture-lane
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‎docs/dev/reports/PR_26146_072_080_control_ownership_matrix.md‎

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# PR_26146_072_080 Control Ownership Matrix
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| Control | Owner | Canonical field | Status |
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| --- | --- | --- | --- |
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| Name | Song Setup | `music.songs[].name` | Wired |
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| Classification | Song Setup | `music.songs[].classification` | Wired |
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| Generated ID | Song Setup | `music.songs[].id` | Wired read-only |
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| Tags | None in Song Details | Preserved payload data only | No editable ownership |
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| Usage | None in Song Details | Preserved director data only | No editable ownership |
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| Tempo/BPM | Song Setup | `studioArrangement.tempo` | Wired |
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| Key | Song Setup | `studioArrangement.key` | Wired |
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| Style | Song Setup | `studioArrangement.style` | Wired |
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| Notes | Song Setup | `music.songs[].director.notes` | Wired |
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| Intro/Verse/Chorus/Bridge/Outro | Song Setup | `studioArrangement.songSheet.sections` | Wired |
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| Add Custom Section | Song Setup | `studioArrangement.songSheet.sections` | Wired |
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| Custom sections text | Song Setup | `studioArrangement.songSheet.sections` | Wired |
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| Available Sections | Song Setup | Derived from populated sections | Wired read-only |
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| Song Sequence | Song Setup | `studioArrangement.songSheet.sequence` | Wired |
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| Add/Duplicate/Move Up/Move Down/Remove sequence | Song Setup | `studioArrangement.songSheet.sequence` | Wired |
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| Drag/drop sequence | Song Setup | Future sequence gesture | Red/unwired |
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| Apply Chords/Pad | Song Setup | `songSheet.applyTargets.chordsPad` | Wired |
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| Apply Bass | Song Setup | `songSheet.applyTargets.bass` | Wired |
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| Apply Drums | Song Setup | `songSheet.applyTargets.drums` | Wired |
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| Apply Lead | Song Setup | `songSheet.applyTargets.lead` | Wired, default off |
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| Parse Guided Song Sheet | Song Setup | `studioArrangement` | Wired |
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| Octave Timeline canvas | Octave Timeline | `studioArrangement.lanes` | Wired |
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| Section buttons | Octave Timeline | parsed section labels | Wired when section exists |
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| Missing section buttons | Octave Timeline | no canonical section | Red/unwired incomplete |
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| Timeline quick instrument select | Octave Timeline | `selectedInstrumentId` | Wired |
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| Mute/Solo/Show quick controls | Octave Timeline | `previewLaneSettings` | Wired |
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| GM Type, GM Instrument, display name | Instruments | `previewLaneSettings` | Wired |
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| Volume, Pan/Balance, Octave Range, Transpose | Instruments | `previewLaneSettings` | Wired |
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| Effects and advanced MIDI controls | Instruments | Future settings | Red/unwired |
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| Audition keyboard | Instruments | Preview Synth from selected instrument settings | Wired |
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| Import JSON Manifest | Global NAV | active manifest/toolState payload | Wired |
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| Manifest MIDI import/inspect | MIDI Import | `studioArrangement` import normalization | Wired |
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| Export target paths | Export | `music.songs[].rendered` | Wired |
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| Save WAV/MP3/OGG | Export | Future rendered-audio renderer | Red/unwired |
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| SoundFont/render pipeline controls | Export | Future renderer settings | Red/unwired |
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| Undo/Redo/Snapshots/Revision History/Revert To Saved/Autosave | Song Setup | Future history state | Red/unwired |
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| Warnings accordion | Right column | Song Sheet diagnostics | Wired read-only |
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| JSON Details | Diagnostics | selected canonical song/toolState | Wired read-only |
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No duplicate editable owners were added for song metadata, section sequence, instruments, export targets, or warnings.

‎docs/dev/reports/PR_26146_072_080_sequence_builder_map.md‎

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# PR_26146_072_080 Sequence Builder Map
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## Available Sections
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Source: populated Song Sheet section fields only.
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| UI evidence | Canonical source | Rule |
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| --- | --- | --- |
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| Available Sections option label | populated `songSheet.sections` row | Shows section name plus bar/chord count |
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| `data-song-sheet-section-color-index` | derived from sequence/available section label order | Shared color identity |
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| `data-song-sheet-section-bar-count` | progression chord token count | One chord token equals one bar in this guided model |
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| `data-song-sheet-section-chord-count` | progression chord token count | Empty sections do not render |
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Validated example:
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- Intro: 4 bars / 4 chords
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- Verse: 4 bars / 4 chords
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- Chorus: 4 bars / 4 chords
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- Custom1: 2 bars / 2 chords
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- Bridge: omitted while empty
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## Song Sequence Actions
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| Action | Behavior | Canonical model |
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| --- | --- | --- |
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| Add | Appends selected Available Section label | `songSheet.sequence` |
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| Duplicate | Duplicates selected sequence item after itself | `songSheet.sequence` |
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| Move Up | Moves selected item earlier | `songSheet.sequence` |
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| Move Down | Moves selected item later | `songSheet.sequence` |
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| Remove | Removes selected item | `songSheet.sequence` |
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| Drag/drop sequence | Visible future control, red/unwired | No mutation |
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Validated sequence:
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`Intro, Verse, Chorus, Custom1, Outro`
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Canonical build order after parse:
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`music.songs[].studioArrangement.sections = "Intro:4, Verse:4, Chorus:4, Custom1:2, Outro:1"`
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## Color Synchronization
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| Surface | Color source | Validation |
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| --- | --- | --- |
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| Available Sections | section label color index | PASS |
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| Song Sequence list | section label color index | PASS |
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| Octave Timeline canvas bars | parsed canonical section order | PASS |
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| Section shortcut buttons | matching parsed section label | PASS |
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| Bar header | current section from timeline reference cell | PASS |
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Repeated section labels reuse the same color index. Missing section buttons remain disabled and red/unwired with an Incomplete tooltip.

‎docs/dev/reports/PR_26146_072_080_song_architecture_bundle_validation.md‎

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# PR_26146_072_080 Song Architecture Bundle Validation
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Status: PASS for targeted MIDI Studio V2 runtime. WARN for required Workspace V2 lane because existing Workspace Manager V2 failures remain outside this PR scope.
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## Scope Verified
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- Song Details owns editable Name and Classification only, with generated read-only ID from `camelCase(Name) + "-" + Classification` when Classification is populated.
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- Tags and Usage remain absent from Song Details editable ownership.
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- Song Sheet uses named Intro, Verse, Chorus, Bridge, Outro progression fields plus a wired Add Custom Section action.
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- Available Sections lists populated sections only and visibly includes section bar/chord counts plus section color data.
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- Song Sequence add, duplicate, move up, move down, and remove actions update canonical sequence order.
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- Parse Guided Song Sheet updates the canonical song model, Octave Timeline order/colors, diagnostics, and JSON Details.
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- Warnings render only in the right-column Warnings accordion.
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- Export ownership, Save WAV/MP3/OGG wording, instrument SSoT, audition keyboard, Play/Stop, selectedInstrumentId sync, and launch NAV behavior were preserved.
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## Validation Commands
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- PASS: `node --check tools/midi-studio-v2/js/controls/SongSheetControl.js`
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- PASS: `node --check tools/midi-studio-v2/js/MidiStudioV2App.js`
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- PASS: `node --check tools/midi-studio-v2/js/bootstrap.js`
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- PASS: `node --check tests/playwright/tools/MidiStudioV2.spec.mjs`
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- PASS: `node --check tools/midi-studio-v2/js/controls/SongDetailsControl.js`
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- PASS: `node --check tools/midi-studio-v2/js/controls/InstrumentGridControl.js`
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- PASS: `node --check tools/midi-studio-v2/js/controls/OctaveTimelineCanvasRenderer.js`
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- PASS: `node --check tools/midi-studio-v2/js/controls/ExportPanelControl.js`
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- PASS: `node --check src/engine/audio/SongSheetParser.js`
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- PASS: `rg --pcre2 -n '<style\b|<script\b(?![^>]*\bsrc=)|\son[a-z]+\s=|style\s=' tools/midi-studio-v2/index.html` returned no inline script, style, event-handler, or inline-style matches.
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- PASS: `npx playwright test tests/playwright/tools/MidiStudioV2.spec.mjs --grep "PR072-080" --reporter=list` ran 1 test and passed.
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- PASS: `npx playwright test tests/playwright/tools/MidiStudioV2.spec.mjs --grep "PR070|PR071|PR072-075|PR076-079|PR072-080" --reporter=list` ran 5 tests and passed.
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- FAIL unrelated: `npm run test:workspace-v2` ran 72 Workspace Manager V2 tests: 49 passed, 23 failed.
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- PASS: `git diff --check`
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## Workspace V2 Lane Classification
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The required workspace-contract lane failed outside MIDI Studio V2. Representative failures:
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- Workspace Manager V2 helper still expects 11 tool tiles and now receives 12.
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- Several repo/game-selection and workspace save/restore tests share the same 11 vs 12 tile-count assertion.
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- One Asset Manager V2 session-context test timed out after 120000 ms and then reported closed-page coverage cleanup.
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No failing workspace-contract stack referenced the changed MIDI Studio V2 files.
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## Playwright Coverage
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`docs/dev/reports/playwright_v8_coverage_report.txt` and `docs/dev/reports/coverage_changed_js_guardrail.txt` were regenerated from the targeted MIDI Studio Playwright run. Changed runtime JS files were collected with advisory coverage.
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## Samples Decision
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SKIP: full samples smoke was not run because this PR only changes MIDI Studio V2 tool behavior and tests use the targeted UAT manifest fixture.

‎docs/dev/reports/PR_26146_072_080_song_sheet_model.md‎

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# PR_26146_072_080 Song Sheet Model
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## Song Details
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| Field | Ownership | Behavior |
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| --- | --- | --- |
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| Name | Song Setup | Editable canonical `music.songs[].name` |
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| Classification | Song Setup | Editable human-typed `music.songs[].classification` |
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| Classification help | Song Setup | `?` help icon with examples: Menu, Intro, Loop, Boss, Victory, Game Over, Ambient, Cutscene, Underwater, Flying, Ice, Lava, Space, Castle, Town, Dungeon, Forest, Night, Stealth, Puzzle, Chase |
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| ID | Song Setup | Read-only generated `music.songs[].id` |
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| Tags | None in Song Details | Not rendered as editable ownership |
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| Usage | None in Song Details | Not rendered as editable ownership |
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ID generation:
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- `Main Theme` + `Loop` -> `mainTheme-Loop`
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- `Forest Theme` + `Underwater` -> `forestTheme-Underwater`
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- `Sky Battle` + `Flying` -> `skyBattle-Flying`
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Duplicate generated IDs receive a numeric suffix to preserve manifest uniqueness.
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## Section Model
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The Song Sheet owns these named progression fields:
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- Intro
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- Verse
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- Chorus
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- Bridge
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- Outro
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Custom sections are added through `Add Custom Section`, which appends the next valid `CustomN:` label into the custom section editor. A custom section becomes populated only after it has progression text.
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Each populated row emits one canonical line in `music.songs[].studioArrangement.songSheet.sections`, for example:
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- `Intro: G C G D`
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- `Verse: G Em C D`
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- `Chorus: C G Am F`
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Empty named or custom sections are omitted from Available Sections and omitted from the canonical section text.
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## Apply Targets
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Defaults:
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- Chords/Pad: enabled
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- Bass: enabled
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- Drums: enabled when a drums lane/instrument exists
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- Lead: disabled
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Canonical field: `music.songs[].studioArrangement.songSheet.applyTargets`.
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## Parse Flow
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Parse Guided Song Sheet composes parser input from:
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- populated sections
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- Song Sequence order
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- Apply Song Sheet To selections
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Successful parse updates:
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- `music.songs[].studioArrangement.songSheet.sections`
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- `music.songs[].studioArrangement.songSheet.sequence`
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- `music.songs[].studioArrangement.songSheet.applyTargets`
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- `music.songs[].studioArrangement.sections`
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- generated Octave Timeline lane text for selected apply targets
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- diagnostics and JSON Details

‎docs/dev/reports/PR_26146_072_080_unwired_audit.md‎

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# PR_26146_072_080 Unwired Audit
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## Rule
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Any visible feature that is not fully implemented must be red/unwired and expose a tooltip/status explaining the incomplete state.
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Central implementation:
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- `tools/midi-studio-v2/js/controls/UnwiredControlState.js`
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- CSS marker: `.midi-studio-v2__unwired-control`
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- Data marker: `data-midi-studio-unwired`
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## Red/Unwired Controls Verified
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| Control group | Examples | Status text |
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| --- | --- | --- |
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| Song Sequence future gesture | Drag/drop sequence | Not implemented |
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| Missing section shortcuts | Boss, Victory, unavailable section buttons | Incomplete |
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| Export renderer | Output Type, Save WAV/MP3/OGG | Not implemented |
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| SoundFont/render pipeline | SoundFont, Render Quality, Sample Rate, Normalize Volume, Export Stems, Loop Export | Not implemented |
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| Editing History | Undo, Redo, Snapshots, Revision History, Revert To Saved, Autosave | Not implemented |
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| MIDI input future controls | Enable MIDI Input, Select MIDI Device, Record MIDI | Not implemented |
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| Instrument future controls | Effects, Advanced MIDI settings | Not implemented |
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## Wired Controls Verified Not Red/Unwired
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| Control group | Examples |
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| --- | --- |
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| Song Details | Name, Classification, generated ID |
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| Song Sheet | named sections, Add Custom Section, Available Sections, Song Sequence actions, Apply targets, Parse Guided Song Sheet |
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| Octave Timeline | canvas editing, section buttons for existing sections, Play Section, Play Loop, Stop, quick instrument selection |
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| Instruments | GM Type, GM Instrument, display name, volume, pan, octave range, transpose, audition keyboard |
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| Export ownership | rendered target path inputs |
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| Global NAV | Import JSON Manifest, Play, Stop, Stop All Audio, Save Project, Reset Song Edits |
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## Tooltip/Status Evidence
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- Future controls expose `title` text beginning with `Not implemented:`.
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- Missing section controls expose `title` text beginning with `Incomplete:`.
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- Export status reports that rendered audio export is not implemented while preserving Save WAV/MP3/OGG wording.
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## Result
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PASS: targeted Playwright found no visible unwired controls missing red styling, `data-midi-studio-unwired`, or explanatory tooltip/status text in the audited MIDI Studio V2 surfaces.

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