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FreeTLab 977cbcd8cc docs(openspec): archive android-auto-local-music Phase 1

Merges its delta requirements into the android-auto-media base spec.
Phases 2 (metadata/sort/filter/art) and 3 (subfolder scoping/shuffle)
remain planned future work.

2026-07-19 20:37:54 +02:00

7.4 KiB

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Archive Report: Android Auto Local Music — Phase 1

Date Archived: 2026-07-19
Change: android-auto-local-music
Verification Status: PASS WITH WARNINGS (0 CRITICAL, 1 WARNING, 1 SUGGESTION)
Delivery Mode: Single PR with size:exception (commit 6ae7e37, all changes staged)

Summary

Phase 1 of the local-music browsing feature (foundational plumbing) has been successfully implemented, verified, and archived. The feature enables users to pick a local-music root folder via SAF, browse nested folders recursively in Android Auto, and play audio files through the existing pipeline. All Phase 1 scope (SAF access, recursive tree traversal, playback integration) is complete and tested. Phases 2 and 3 (metadata extraction, sort/filter, subfolder refinements, shuffle) remain explicitly deferred as planned future work.

Verification Results

Test Evidence: 91/91 tests passing (66 navigation tests + 4 audio-file tests + 21 regression tests)

Spec Compliance: All 4 ADDED and 1 MODIFIED requirements implemented and verified:

Local Music Root Access and Permission Persistence: cold-start safe, graceful degradation on revoked permission
Local Music Browsable Tree: 5-folder root (new Musica Local folder 4th, before Ecualizador), recursive carpeta_local:/pista: browsing, empty folders return []
Local Track Playback Reuses Existing Pipeline: pista: playback routed through same playMediaItem seam as stations, EQ regression guard passed
Local Music Folder Item Cap: 50-item cap enforced, alphabetically sorted
Browsable Media Tree (MODIFIED): root now returns 5 folders (was 4)

Native Code: Static-review only (Android build/DHU not available in this environment, per project precedent). MainActivity.kt additions validated structurally: SAF APIs correct, cursor management sound, result handling explicit, no resource leaks detected.

Files Changed: 8 tracked files (1046 insertions, 29 deletions), 3 new untracked files (267 lines), within estimate.

Warnings and Follow-up

WARNING (FIXED): L10n locale completeness — 11 non-English/non-Spanish .arb files were initially skipped with an inaccurate justification. This was flagged in verify-report.md and subsequently fixed in commit 6ae7e37, which added all 13 locale translations before archival. All 13 locale files now contain the new localMusicSectionTitle, localMusicSectionDescription, etc. keys. Status: RESOLVED.

SUGGESTION (LOW-PRIORITY FOLLOW-UP): Settings UI folder-path display shows raw SAF URI (content://com.android.externalstorage.documents/tree/...) instead of a human-friendly path, unlike the _SeccionGrabaciones precedent. This is a cosmetic UX issue only — Phase 1 spec does not require friendly display. Recommended for Phase 2 polish, does not block archival.

No CRITICAL issues found.

Merged Specification

The delta spec requirements (4 ADDED + 1 MODIFIED) have been merged into the base capability spec at openspec/specs/android-auto-media/spec.md. The four new requirements (Local Music Root Access, Browsable Tree, Playback Pipeline Reuse, Folder Item Cap) are now part of the permanent specification. The modified "Browsable Media Tree" requirement now documents the 5-folder root structure as the new norm.

Archived Artifacts

Artifact	Location	Purpose
proposal.md	`openspec/changes/archive/2026-07-19-android-auto-local-music/`	Original proposal, scope, risks, success criteria
design.md	Same	Architecture decisions, technical approach, interfaces
tasks.md	Same	12 task groups, grounding notes, TDD cycles, review workload forecast
apply-progress.md	Same	Completion record, TDD evidence table, deviations, risks
verify-report.md	Same	Test results, spec compliance verification, hygiene checks
spec.md (delta)	`openspec/changes/archive/2026-07-19-android-auto-local-music/specs/android-auto-media/`	Delta spec: 4 ADDED + 1 MODIFIED requirements

Change folder archival: Original change folder at openspec/changes/android-auto-local-music/ remains in place and must be manually deleted by orchestrator (this tool cannot delete directories). All working changes are staged for commit in git.

Phase 1 Scope: Complete

Implemented:

SAF folder picking via ACTION_OPEN_DOCUMENT_TREE, persisted URI permission
Graceful cold-start handling (no re-prompt if permission lost or never granted)
Recursive DocumentFile traversal: pure Dart PistaLocal model, lazy per-folder native enumeration
Android Auto browse tree extension: new Musica Local root folder, carpeta_local: folder ids, pista: track ids
Playback integration: local tracks play through existing pipeline, EQ applies, fallback art rotates
50-item folder cap, alphabetical sort, filename-based titles (extension stripped for tracks only)
Phone-side settings UI: _SeccionMusicaLocal folder picker, SharedPreferences persistence
L10n support: all 13 locale files translated (English, Spanish, Russian, Chinese, Japanese, Portuguese, French, Hindi, Indonesian, Italian, German, Arabic, Bengali)

Not in Phase 1 (explicitly deferred):

Metadata extraction: no title/artist/album art/bitrate/sample-rate beyond raw filename
Sort/filter: no user-controlled ordering or filtering
Subfolder scoping refinements: simple recursive model only
Shuffle: no shuffle implementation
Embedded album art: fallback rotation only
Phone-side waveform: visualizador_audio.dart reuse deferred

Risk Summary

Unverified at runtime (expected per project precedent for native Android work):

MainActivity.onActivityResult new override: carefully written against documented SAF patterns, structurally sound, reviewer attention flagged
DocumentsContract MIME filtering and permission persistence: standard API usage, unexercised against real SAF provider in this environment

Mitigated:

Cold-start/revoked-permission handling: explicit tests + try/catch wrapping, validated to degrade safely
EQ regression: structural proof that local playback uses same seam as station playback
Collision-free media ids: explicit tests covering : in documentId, proving length-based stripping

Next Recommended

Phase 2 (future work, out of scope for this delta): metadata extraction (title/artist/embedded art/bitrate from audio files), sort by title/quality, embedded album art support.

Phase 3 (future work): subfolder scoping refinements (e.g., exclude certain folders), shuffle support.

Cosmetic follow-ups (low priority, non-blocking):

Friendly path display in settings UI (e.g., last folder name instead of raw SAF URI)
Phone-side waveform visualization reuse (separate architectural decision, documented in proposal)

Traceability

All phase artifacts (proposal, spec, design, tasks, apply-progress, verify-report) are archived in openspec/changes/archive/2026-07-19-android-auto-local-music/. Base spec has been permanently updated at openspec/specs/android-auto-media/spec.md. Git commit 6ae7e37 contains all implementation changes, staged for merge.

Archived by: SDD Archive Executor
Time: 2026-07-19
Status: READY FOR ORCHESTRATOR MERGE AND CLEANUP

Orchestrator action items:

Commit/push git changes (all staged in commit 6ae7e37)
Delete original change folder at openspec/changes/android-auto-local-music/ (tool cannot delete)
Next phase: plan Phase 2 if metadata extraction is ready for detailed exploration

7.4 KiB Raw Blame History