docs(openspec): archive android-auto-favorite-groups
Merges its delta requirements into the android-auto-media base spec.
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# Archive Report: android-auto-favorite-groups
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**Date**: 2026-07-19
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**Status**: PASS WITH WARNINGS → ARCHIVED
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**Artifact Store**: hybrid (openspec + engram)
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## Change Summary
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**Change Name**: android-auto-favorite-groups
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**Proposal**: Expose favorite groups (`GrupoFavoritos`) as browsable, non-playable sub-folders in the Android Auto browse tree under the existing `Favoritos` folder, leveraging the existing group data model without introducing new schema or phone-UI changes.
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**Verification Verdict**: PASS WITH WARNINGS
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- **CRITICAL Issues**: 0
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- **WARNING Issues**: 1 (test-count report accuracy in apply-progress.md, corrected to 54/54 before archive)
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- **SUGGESTION Issues**: 2 (non-blocking, low-priority)
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**Implementation Status**: Complete (git commit f368bcc on main, 291 changed lines across 5 files)
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## Artifacts Archived
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| Artifact | Location | Status |
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|----------|----------|--------|
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| proposal.md | openspec/changes/archive/2026-07-19-android-auto-favorite-groups/proposal.md | Archived |
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| design.md | openspec/changes/archive/2026-07-19-android-auto-favorite-groups/design.md | Archived |
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| tasks.md | openspec/changes/archive/2026-07-19-android-auto-favorite-groups/tasks.md | Archived |
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| apply-progress.md | openspec/changes/archive/2026-07-19-android-auto-favorite-groups/apply-progress.md | Archived |
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| verify-report.md | openspec/changes/archive/2026-07-19-android-auto-favorite-groups/verify-report.md | Archived |
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| delta spec | openspec/changes/archive/2026-07-19-android-auto-favorite-groups/specs/android-auto-media/spec.md | Archived |
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## Spec Synchronization
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### Main Spec Updated
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**File**: openspec/specs/android-auto-media/spec.md
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**Changes Applied**:
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1. **ADDED**: "Favorite Group Sub-Folders" requirement (3 scenarios)
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- Car requests Favoritos folder and groups exist
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- Car requests a group folder's stations
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- Car requests an unknown or stale group id
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2. **ADDED**: "Empty Favorite Group Handling" requirement (2 scenarios)
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- Empty group folder is browsed (if shown)
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- No user-facing dead end
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3. **MODIFIED**: "Browsable Media Tree" requirement
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- Updated description to note `Favoritos` MAY contain favorite-group sub-folders
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- Changed precedent note from "Previously: no subtitle requirement..." to "Previously: `Favoritos` was a flat folder of playable station items only, with no sub-folder nesting."
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- Added new scenario: "Ungrouped station appears exactly as before (regression guard)"
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**Summary**: 2 new requirements (7 scenarios total), 1 existing requirement enhanced with 1 new scenario, maintaining full backward-compatibility for ungrouped stations.
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## Implementation Verification
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**Verification Command**:
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```
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flutter test test/servicios/navegacion_auto_test.dart test/estado/estado_radio_test.dart --concurrency=1 --timeout=60s
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```
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**Result**: PASS — 54/54 tests
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- navegacion_auto_test.dart: 33/33 passed
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- estado_radio_test.dart: 21/21 passed
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**Files Changed** (5 total, 291 changed lines):
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1. `lib/servicios/navegacion_auto.dart` — Added `grupos()` source, snapshot field, `esCarpetaGrupo`, `itemGrupo`, `carpetasFavoritos`, `hijosGrupo` methods
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2. `lib/servicios/servicio_audio.dart` — Added two new branches in `getChildren` dispatch
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3. `lib/estado/estado_radio.dart` — Push `gruposFavoritos` into Auto snapshot
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4. `test/servicios/navegacion_auto_test.dart` — Added 8 new test groups covering pure builders
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5. `test/estado/estado_radio_test.dart` — Updated fake, added snapshot-push assertion
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**Regression Guard**: Regression parity test confirms byte-identical output for `Favoritos` folder when no custom groups exist — the no-custom-groups case reuses the existing `hijos()` path, not a parallel reimplementation.
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## Issues Summary
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### WARNING (1)
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1. **Test-count report accuracy** (apply-progress.md)
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- apply-progress.md originally claimed 55/55 tests (34/34 + 21/21)
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- Actual: 54/54 tests (33/33 + 21/21)
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- Status: Corrected before archive
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- Impact: Cosmetic documentation defect only; no missing coverage
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### SUGGESTIONS (2)
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1. **50-group cap boundary test** — uses bulk-of-60 style, not exact 50-vs-51 boundary; consistent with pre-existing precedent
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2. **Mixed browsable+playable children car-UI rendering** — flagged as open question, requires DHU/hardware testing; carry forward as known residual risk
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## Rollback Information
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**Rollback is straightforward**:
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- Revert the `grupos()` method and snapshot field from `FuenteEmisorasAuto`
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- Revert the two new branches in `servicio_audio.dart` `getChildren`
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- Revert the `_fuenteAuto?.actualizarSnapshot(grupos: ...)` push in `estado_radio.dart`
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- All changes are additive; pre-existing 3-folder tree, group CRUD, phone UI, and SQLite schema remain untouched
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## Verification Compliance
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| Requirement | Status | Evidence |
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|-------------|--------|----------|
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| Favorite Group Sub-Folders spec compliance | PASS | carpetasFavoritos test cases (459-524), esCarpetaGrupo prefix checks |
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| grupo:<id> collision-free vs emisora:<uuid> | PASS | resolver collision test (557-565) confirms no-op for grupo: prefix |
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| Empty group handling | PASS | empty-group fixture test (484-505) confirms omission from tree |
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| Regression guard (ungrouped stations) | PASS | byte-identical output via direct hijos() reuse (navegacion_auto.dart:234, test 429-457) |
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| Design coherence | PASS | All 7 design decisions verified against implementation |
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| Task completion | PASS | All 22 tasks marked complete, confirmed by code inspection |
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| TDD cycle compliance | PASS | 54/54 tests passing, pure functions fully unit-tested |
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## SDD Cycle Closure
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This change completes the full SDD cycle for android-auto-favorite-groups:
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1. ✅ **Exploration**: Investigation 1 (Approach 1 — data-model reuse)
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2. ✅ **Proposal**: Defined scope, capabilities, risks, rollback
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3. ✅ **Spec**: Delta spec with 2 new + 1 modified requirements
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4. ✅ **Design**: 4 architecture decisions, pure-function seam strategy
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5. ✅ **Tasks**: 5 phases, 22 tasks (foundation → core → wiring → testing → cleanup)
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6. ✅ **Apply**: Strict TDD, single PR, 291 changed lines, 54/54 tests green
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7. ✅ **Verify**: Fresh adversarial pass, PASS WITH WARNINGS (1 cosmetic, 2 suggestions)
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8. ✅ **Archive**: Specs merged, change folder moved, audit trail created
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## Next Steps
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- **No follow-up required** — change is complete and ready for release
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- **Known residual risk**: Mixed browsable+playable children rendering on real car UI — schedule DHU/hardware verification before launch if not yet done
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- **Optional enhancement**: Consider boundary test for 50-vs-51 group cap as a future refinement (non-blocking)
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## Persistence
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This archive report is persisted to:
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1. **Filesystem**: openspec/changes/archive/2026-07-19-android-auto-favorite-groups/archive-report.md (this file)
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2. **Engram**: topic_key `sdd/android-auto-favorite-groups/archive-report` (via mem_save, architecture type)
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---
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**Archive Date**: 2026-07-19
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**Archived By**: sdd-archive executor
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**Status**: COMPLETE
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