> For the complete documentation index, see [llms.txt](https://ai-os-and-trend-finder.gitbook.io/ai-os-and-trend-finder-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ai-os-and-trend-finder.gitbook.io/ai-os-and-trend-finder-docs/.spec_system/archive/sessions/phase36-session04-theme-audio-routing-contract/implementation_summary.md). # Implementation Summary **Session ID**: `phase36-session04-theme-audio-routing-contract` **Completed**: 2026-06-28 **Duration**: 3-4 hours *** ## Overview Session 04 implemented the AI Rogue theme ambience routing contract. The runtime now keeps existing title, depth, victory, and defeat music on the primary music lane while adding a separate low-gain ambience lane keyed by `snapshot.theme`. Missing future ambience assets no-op safely, and the contract is documented for Session 05 to add five local Ogg Opus loops. *** ## Deliverables ### Files Created | File | Purpose | Lines | | --------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------- | ----- | | `.spec_system/specs/phase36-session04-theme-audio-routing-contract/spec.md` | Session scope, requirements, and success criteria | \~338 | | `.spec_system/specs/phase36-session04-theme-audio-routing-contract/tasks.md` | Task checklist and completion evidence | \~75 | | `.spec_system/specs/phase36-session04-theme-audio-routing-contract/implementation-notes.md` | Implementation log and command evidence | \~774 | | `.spec_system/specs/phase36-session04-theme-audio-routing-contract/code-review.md` | Review result and verification ledger | \~76 | | `.spec_system/specs/phase36-session04-theme-audio-routing-contract/security-compliance.md` | Security and GDPR assessment | \~93 | | `.spec_system/specs/phase36-session04-theme-audio-routing-contract/validation.md` | Validation report and final PASS evidence | \~268 | | `.spec_system/specs/phase36-session04-theme-audio-routing-contract/IMPLEMENTATION_SUMMARY.md` | Session completion summary | \~110 | | `src/extensions/ai-rogue/runtime/__tests__/renderer-audio-adapter.test.ts` | Adapter tests for ambience start, change, no-op, and terminal stop behavior | \~216 | ### Files Modified | File | Changes | | ---------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------- | | `.spec_system/state.json` | Cleared current session, added Session 04 completion, and appended completion history | | `.spec_system/PRD/phase_36/PRD_phase_36.md` | Updated Phase 36 progress from 3/8 to 4/8 | | `.spec_system/PRD/phase_36/session_04_theme_audio_routing_contract.md` | Marked session complete and checked success criteria | | `package.json` | Bumped patch version from 0.5.59 to 0.5.60 | | `README.md` | Updated current project version line to 0.5.60 | | `docs/CHANGELOG.md` | Added Phase 36 Session 04 changelog entry | | `src/extensions/ai-rogue/runtime/audio.ts` | Added typed theme ambience IDs, URL lookup, low-gain lane, play/stop methods, cleanup, and test hook | | `src/extensions/ai-rogue/runtime/renderer-audio-adapter.ts` | Routed snapshot themes to ambience changes and terminal cleanup | | `src/extensions/ai-rogue/runtime/renderer.ts` | Wired start, descend, reset, load, terminal, preference, and destroy ambience lifecycle calls | | `src/extensions/ai-rogue/runtime/themes.ts` | Aligned sector audio hints with typed ambience route IDs | | `src/extensions/ai-rogue/runtime/__tests__/audio.test.ts` | Added ambience engine coverage for unlock, duplicate prevention, stop, dispose, mute, volume, missing URL, and decode failure | | `src/extensions/ai-rogue/runtime/__tests__/themes.test.ts` | Added exhaustive theme-to-ambience route coverage | | `tests/e2e/ai-rogue-runtime.spec.ts` | Added browser proof for theme ambience route selection | | `docs/extensions/ai-rogue/game-feel.md` | Documented bus behavior, lifecycle, fallback, and Session 05 asset contract | | `docs/media-policy.md` | Clarified theme ambience loops live under `audio/music/` and use the AI Rogue music cap | *** ## Technical Decisions 1. **Second ambience lane**: Kept depth/title/victory/defeat music stable and layered theme identity through a low-gain ambience lane. 2. **Existing music preference**: Ambience follows master mute and music volume without adding Settings UI or persisted schema. 3. **Local missing-asset fallback**: Session 04 reserves route IDs and future basenames, but missing Session 05 files silently no-op until assets ship. 4. **Presentation-only theme selection**: Routing reads `snapshot.theme` but does not alter simulation state, RNG, replay behavior, saves, or balance. *** ## Test Results | Metric | Value | | ------------------- | ------------------- | | Focused tests | 30/30 passed | | Full Vitest | 4393/4393 passed | | Playwright Chromium | 11/11 passed | | Typecheck | PASS | | Lint | PASS | | Asset sizes | PASS | | Coverage | N/A - not collected | *** ## Lessons Learned 1. Theme audio can be added safely without replacing the validated depth music lane when the bus and lifecycle boundaries are explicit. 2. Missing local media should be treated as a normal runtime state so contracts can land before final assets. 3. Adapter-level tests are the clearest place to prove start, descend, terminal, and same-theme no-op behavior without widening UI scope. *** ## Future Considerations Items for future sessions: 1. Session 05 should add the five optimized ambience loops with provenance under `src/assets/ai-rogue/audio/music/`. 2. Session 05 should rerun asset-size validation after adding final media files. 3. Session 08 should include human acoustic listening for final audio balance. *** ## Session Statistics * **Tasks**: 19 completed * **Files Created**: 8 * **Files Modified**: 15 * **Tests Added**: 30 focused audio/theme/adapter tests plus browser proof updates * **Blockers**: 0 resolved --- # Agent Instructions This documentation is published with GitBook. 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