> 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-session06-adaptive-music-engine-expansion/implementation-notes.md).

# Implementation Notes

**Session ID**: `phase36-session06-adaptive-music-engine-expansion` **Started**: 2026-06-28 19:10 **Last Updated**: 2026-06-28 20:08

***

## Session Progress

| Metric              | Value     |
| ------------------- | --------- |
| Tasks Completed     | 19 / 19   |
| Estimated Remaining | 3-4 hours |
| Blockers            | 0         |

***

## Task Log

### 2026-06-28 - Session Start

**Environment verified**:

* [x] `.spec_system` state available
* [x] `jq` available
* [x] `git` available
* [x] Directory structure ready
* [x] Behavioral quality checklist loaded

***

### Task T001 - Verify prerequisites and current no-ducking documentation

**Started**: 2026-06-28 19:07 **Completed**: 2026-06-28 19:10 **Duration**: 3 minutes

**Notes**:

* Confirmed the active session is `phase36-session06-adaptive-music-engine-expansion`.
* Confirmed Phase 36 Sessions 01-05 and Phase 35 Session 10 are listed as completed prerequisites in the session spec and deterministic project analysis.
* Confirmed the current durable audio docs still describe event-based music ducking as absent before this session.
* Confirmed the phase session stub still marks Session 06 prerequisites and success criteria as unchecked before implementation.

**Files Changed**:

* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/implementation-notes.md` - Created implementation log and recorded prerequisite evidence.
* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/tasks.md` - Added progress tracking and marked T001 complete.

**Verification**:

* Command/check: `if [ -d .spec_system/scripts ]; then bash .spec_system/scripts/analyze-project.sh --json; else bash /home/aiwithapex/.codex/plugins/cache/apex-spec-system/apex-spec/2.1.3-codex/skills/apex-spec/scripts/analyze-project.sh --json; fi`
  * Result: PASS - Current session resolved to `phase36-session06-adaptive-music-engine-expansion`; completed session list includes Phase 36 Sessions 01-05.
  * Evidence: Script output reported `current_phase: 36`, active session 06, and completed sessions through `phase36-session05-sector-theme-audio-pack`.
* Command/check: `if [ -d .spec_system/scripts ]; then bash .spec_system/scripts/check-prereqs.sh --json --env; else bash /home/aiwithapex/.codex/plugins/cache/apex-spec-system/apex-spec/2.1.3-codex/skills/apex-spec/scripts/check-prereqs.sh --json --env; fi`
  * Result: PASS - Environment prerequisites passed.
  * Evidence: Overall status `pass`; `.spec_system`, `jq-1.7`, and `git version 2.43.0` available.
* Command/check: `sed -n '1,260p' .spec_system/PRD/phase_36/session_06_adaptive_music_engine_expansion.md`
  * Result: PASS - Session stub reviewed.
  * Evidence: Stub still marks Session 06 as `Not Started` and lists adaptive stinger runtime contract deliverables.
* Command/check: `sed -n '1,260p' docs/extensions/ai-rogue/game-feel.md`
  * Result: PASS - Current no-ducking documentation reviewed.
  * Evidence: Audio Runtime Contract says the current runtime does not include sidechain, transient music-gain reduction, or event-based ducking.
* UI product-surface check: N/A - T001 was prerequisite and documentation inspection only.
* UI craft check: N/A - T001 did not change a user-facing surface.

***

### Task T002 - Inspect current audio insertion points

**Started**: 2026-06-28 19:10 **Completed**: 2026-06-28 19:12 **Duration**: 2 minutes

**Notes**:

* Inspected `audio.ts` and confirmed the Web Audio graph already owns master, music, theme ambience, SFX, heartbeat, lazy decode, silent fallback, and disposal behavior.
* Inspected `renderer-audio-adapter.ts` and confirmed it is the presentation-only boundary where simulation results, previous theme context, music routing, ambience routing, and heartbeat updates meet.
* Inspected renderer start handling and found one direct `run_start` one-shot that should move behind the adaptive combat-start request to avoid duplicate playback.
* Inspected simulation event producers for `objective_unlock`, `compile_payload`, `final_defense_survived`, `win`, and `loss` cues; no simulation schema changes are needed.
* Inspected focused unit and browser proof tests to preserve current fallback, theme ambience, enemy/boss SFX, mute, volume, and silent-engine expectations.

**Files Changed**:

* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/implementation-notes.md` - Recorded inspected insertion points and decisions.
* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/tasks.md` - Marked T002 complete.

**Verification**:

* Command/check: `sed -n '1,1040p' src/extensions/ai-rogue/runtime/audio.ts`
  * Result: PASS - Engine graph and no-ducking baseline inspected.
  * Evidence: Found `musicGain`, `themeAmbienceGain`, `sfxGain`, `applyMixLevels()`, heartbeat loop, silent engine, and disposal paths.
* Command/check: `sed -n '1,260p' src/extensions/ai-rogue/runtime/renderer-audio-adapter.ts`
  * Result: PASS - Adapter routing boundary inspected.
  * Evidence: Found `dispatchAudioForResult()`, `playThemeAmbienceForState()`, and `updateHeartbeat()` as the existing audio presentation helpers.
* Command/check: `rg "objective_unlock|compile_payload|final_defense|run_start|kernel-sentinel" src/extensions/ai-rogue/runtime -n`
  * Result: PASS - Event cue producers and boss identity references inspected.
  * Evidence: Found cue producers in `simulation.ts`, direct `run_start` in `renderer.ts`, boss kind in entities/combat/rendering, and existing tests.
* Command/check: `sed -n '1,1040p' src/extensions/ai-rogue/runtime/__tests__/audio.test.ts` and `sed -n '1,620p' src/extensions/ai-rogue/runtime/__tests__/renderer-audio-adapter.test.ts`
  * Result: PASS - Existing test patterns inspected.
  * Evidence: Found fake AudioContext controls, URL fetch assertions, theme ambience tests, and adapter routing assertions to extend.
* Command/check: `sed -n '1,1040p' tests/e2e/ai-rogue-runtime.spec.ts`
  * Result: PASS - Browser proof harness inspected.
  * Evidence: Found fake AudioContext proof harness, audio URL/source-start tracking, failed request capture, silent fallback proof, and desktop/mobile viewport loop.
* UI product-surface check: N/A - T002 was inspection only.
* UI craft check: N/A - T002 did not change a user-facing surface.

***

### Task T003 - Create implementation notes

**Started**: 2026-06-28 19:10 **Completed**: 2026-06-28 19:13 **Duration**: 3 minutes

**Notes**:

* Created the required implementation notes artifact with session metadata, progress table, environment verification, and per-task evidence sections.
* Established the logging format needed for contract decisions, failure-path evidence, browser review, and validation commands throughout the session.

**Files Changed**:

* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/implementation-notes.md` - Created and populated implementation evidence structure.
* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/tasks.md` - Marked T003 complete.

**Verification**:

* Command/check: `test -f .spec_system/specs/phase36-session06-adaptive-music-engine-expansion/implementation-notes.md`
  * Result: PASS - Implementation notes file exists.
  * Evidence: File contains session metadata, environment verification, and task log entries for T001-T003.
* Command/check: `sed -n '1,220p' .spec_system/specs/phase36-session06-adaptive-music-engine-expansion/implementation-notes.md`
  * Result: PASS - Notes structure reviewed.
  * Evidence: Header, Session Progress table, Session Start entry, and task evidence sections are present.
* UI product-surface check: N/A - T003 created workflow documentation only.
* UI craft check: N/A - T003 did not change a user-facing surface.

***

### Task T004 - Add typed adaptive-audio request contract

**Started**: 2026-06-28 19:13 **Completed**: 2026-06-28 19:16 **Duration**: 3 minutes

**Notes**:

* Added the seven Session 06 adaptive request IDs as an exported TypeScript union.
* Added the exported request payload shape with `variantSeed` and `playCue` so renderer paths can request ducking without duplicating an event cue already emitted by simulation.
* Added an exhaustive profile map for provisional cue IDs, volumes, cooldowns, and ducking envelopes.
* Kept dedicated adaptive stinger assets out of scope; all provisional cues reuse committed Session 03/05-era cue IDs.

**Files Changed**:

* `src/extensions/ai-rogue/runtime/audio.ts` - Added adaptive request types and the provisional profile map.
* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/implementation-notes.md` - Recorded T004 implementation evidence.
* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/tasks.md` - Marked T004 complete.

**Verification**:

* Command/check: `bun run typecheck`
  * Result: PASS - TypeScript accepted the new adaptive request union, request payload, and exhaustive profile map.
  * Evidence: `tsc --noEmit` completed with exit code 0.
* Command/check: Targeted inspection of `src/extensions/ai-rogue/runtime/audio.ts`
  * Result: PASS - All required IDs are represented.
  * Evidence: Contract includes `combat_start`, `low_hp`, `boss_reveal`, `objective_unlock`, `final_defense`, `victory_transition`, and `defeat_transition`.
* UI product-surface check: N/A - T004 changed runtime type contracts only.
* UI craft check: N/A - T004 did not change a user-facing surface.

**BQC Fixes**:

* Contract alignment: Used `satisfies Record<AiRogueAdaptiveAudioRequestId, AiRogueAdaptiveAudioProfile>` so missing or extra request IDs fail typechecking (`src/extensions/ai-rogue/runtime/audio.ts`).

***

### Task T005 - Add adaptive request method and silent no-op

**Started**: 2026-06-28 19:17 **Completed**: 2026-06-28 19:19 **Duration**: 2 minutes

**Notes**:

* Added `requestAdaptiveAudio()` to the `AiRogueAudioEngine` interface.
* Added a silent-engine no-op implementation so no-Web-Audio, SSR, and construction-failure paths remain branch-free.
* Added the first real-engine implementation path that resolves the adaptive profile and plays the provisional cue through the existing SFX lane.
* Updated the existing renderer-adapter audio mock to satisfy the expanded engine interface.

**Files Changed**:

* `src/extensions/ai-rogue/runtime/audio.ts` - Added `requestAdaptiveAudio()` to the engine interface, silent engine, and real engine.
* `src/extensions/ai-rogue/runtime/__tests__/renderer-audio-adapter.test.ts` - Added the new method to the test audio mock.
* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/implementation-notes.md` - Recorded T005 implementation evidence.
* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/tasks.md` - Marked T005 complete.

**Verification**:

* Command/check: `bun run typecheck`
  * Result: PASS - Expanded engine interface and existing test mocks typecheck.
  * Evidence: `tsc --noEmit` completed with exit code 0.
* Command/check: Targeted inspection of `SILENT_ENGINE` in `src/extensions/ai-rogue/runtime/audio.ts`
  * Result: PASS - Silent fallback path includes `requestAdaptiveAudio()`.
  * Evidence: The silent engine method is a no-op alongside existing playback no-ops.
* UI product-surface check: N/A - T005 changed runtime API plumbing only.
* UI craft check: N/A - T005 did not change a user-facing surface.

**BQC Fixes**:

* Failure path completeness: Added no-op adaptive handling to the silent engine so unavailable Web Audio remains no-throw (`src/extensions/ai-rogue/runtime/audio.ts`).
* Contract alignment: Updated the renderer-adapter test mock to include the new engine method (`src/extensions/ai-rogue/runtime/__tests__/renderer-audio-adapter.test.ts`).

***

### Task T006 - Add adaptive cooldown and duplicate prevention

**Started**: 2026-06-28 19:20 **Completed**: 2026-06-28 19:21 **Duration**: 1 minute

**Notes**:

* Added per-request cooldown tracking keyed by `AiRogueAdaptiveAudioRequestId`.
* Gated adaptive requests before provisional cue playback so repeated calls inside the cooldown window cannot stack SFX requests.
* Cleared cooldown state during engine disposal so a disposed engine does not retain stale request state.

**Files Changed**:

* `src/extensions/ai-rogue/runtime/audio.ts` - Added adaptive cooldown state, duplicate gating, and disposal cleanup.
* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/implementation-notes.md` - Recorded T006 implementation evidence.
* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/tasks.md` - Marked T006 complete.

**Verification**:

* Command/check: `bun run typecheck`
  * Result: PASS - Cooldown map keys and disposal cleanup typecheck.
  * Evidence: `tsc --noEmit` completed with exit code 0.
* Command/check: Targeted inspection of `requestAdaptiveAudio()` and `dispose()` in `src/extensions/ai-rogue/runtime/audio.ts`
  * Result: PASS - Duplicate requests are gated by `adaptiveCooldownUntilMs`, and the map is cleared on disposal.
  * Evidence: Cooldown set uses `currentMs + profile.cooldownMs`; disposal calls `adaptiveCooldownUntilMs.clear()`.
* UI product-surface check: N/A - T006 changed runtime audio behavior only.
* UI craft check: N/A - T006 did not change a user-facing surface.

**BQC Fixes**:

* Duplicate action prevention: Adaptive request IDs now have bounded duplicate gating before cue playback (`src/extensions/ai-rogue/runtime/audio.ts`).
* Resource cleanup: Cooldown state is cleared on engine disposal (`src/extensions/ai-rogue/runtime/audio.ts`).

***

### Task T007 - Add transient music and theme ambience ducking

**Started**: 2026-06-28 19:22 **Completed**: 2026-06-28 19:24 **Duration**: 2 minutes

**Notes**:

* Added a bounded adaptive ducking overlay for the primary music and theme ambience lanes.
* Refactored music-lane gain application so preference changes during a duck recompute targets from the current music volume and current duck factor.
* Adaptive ducking cancels stale scheduled values before applying a new envelope, then restores the lanes after the profile hold window.
* Disposal clears the recovery timer, resets the duck factor, and clears cooldown state.

**Files Changed**:

* `src/extensions/ai-rogue/runtime/audio.ts` - Added adaptive ducking state, gain application helper, recovery timer, and disposal cleanup.
* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/implementation-notes.md` - Recorded T007 implementation evidence.
* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/tasks.md` - Marked T007 complete.

**Verification**:

* Command/check: `bun run typecheck`
  * Result: PASS - Ducking helpers, timer type, and engine method typecheck.
  * Evidence: `tsc --noEmit` completed with exit code 0.
* Command/check: Targeted inspection of `applyMusicLaneLevels()`, `applyAdaptiveDucking()`, `setPreferences()`, and `dispose()` in `src/extensions/ai-rogue/runtime/audio.ts`
  * Result: PASS - Music and theme ambience lane levels are derived from current preferences and the active duck factor; disposal clears timer state.
  * Evidence: `setPreferences()` calls `applyMixLevels()`, which now delegates to `applyMusicLaneLevels()`; `dispose()` calls `clearAdaptiveDuckTimer()` and resets `adaptiveDuckFactor`.
* UI product-surface check: N/A - T007 changed runtime audio behavior only.
* UI craft check: N/A - T007 did not change a user-facing surface.

**BQC Fixes**:

* Resource cleanup: Added adaptive duck timer cleanup on disposal (`src/extensions/ai-rogue/runtime/audio.ts`).
* State freshness on re-entry: Preference updates reapply music/theme lane levels through current duck state rather than stale scheduled values (`src/extensions/ai-rogue/runtime/audio.ts`).
* Concurrency safety: New adaptive requests cancel prior scheduled music/theme gain changes before applying their own bounded envelope (`src/extensions/ai-rogue/runtime/audio.ts`).

***

### Task T008 - Route event-derived adaptive requests

**Started**: 2026-06-28 19:25 **Completed**: 2026-06-28 19:29 **Duration**: 4 minutes

**Notes**:

* Added renderer-adapter routing for combat start, objective unlock, final defense, victory transition, and defeat transition adaptive requests.
* Used `playCue: false` when simulation events already carry the same provisional cue, preventing duplicate objective/final/terminal one-shots while still applying ducking.
* Replaced the renderer fresh-start direct `run_start` SFX call with `requestCombatStartAudio()` so combat start uses the typed adaptive path.
* Preserved existing event SFX dispatch, descend music changes, terminal music transitions, theme ambience routing, and heartbeat update order.

**Files Changed**:

* `src/extensions/ai-rogue/runtime/renderer-audio-adapter.ts` - Added adaptive event request derivation and combat-start helper.
* `src/extensions/ai-rogue/runtime/renderer.ts` - Routed fresh-run start through adaptive combat-start helper.
* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/implementation-notes.md` - Recorded T008 implementation evidence.
* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/tasks.md` - Marked T008 complete.

**Verification**:

* Command/check: `bun run typecheck`
  * Result: PASS - Adapter request routing and renderer import changes typecheck.
  * Evidence: `tsc --noEmit` completed with exit code 0.
* Command/check: Targeted inspection of `dispatchAudioForResult()` and renderer fresh-start path.
  * Result: PASS - Event adaptive requests are dispatched after simulation SFX handling and before terminal music; fresh start no longer calls `playSfx("run_start")` directly.
  * Evidence: `dispatchAdaptiveEventRequests()` handles `run-started`, `objective_unlock`, `compile_payload`, `final_defense_survived`, `won`, and `lost`; renderer calls `requestCombatStartAudio(audio, state)`.
* UI product-surface check: N/A - T008 changed runtime audio routing only; no visible UI changed.
* UI craft check: N/A - T008 did not change a user-facing surface.

**BQC Fixes**:

* Duplicate action prevention: Adapter sends `playCue: false` for adaptive requests whose simulation event already emitted the provisional cue (`src/extensions/ai-rogue/runtime/renderer-audio-adapter.ts`).
* Contract alignment: Renderer call sites now use the typed adaptive request API instead of ad hoc direct SFX for combat start (`src/extensions/ai-rogue/runtime/renderer.ts`).

***

### Task T009 - Route low HP and boss reveal snapshot transitions

**Started**: 2026-06-28 19:30 **Completed**: 2026-06-28 19:33 **Duration**: 3 minutes

**Notes**:

* Added previous-snapshot context to `dispatchAudioForResult()` and passed it from the renderer before mutating runtime state.
* Routed `low_hp` only when the player enters active low-HP pressure from a non-low-HP previous snapshot.
* Routed `boss_reveal` only when a visible living Kernel Sentinel appears after not being visible in the previous snapshot.
* Tightened terminal transition requests to fire only when entering won/lost status if prior snapshot context exists.

**Files Changed**:

* `src/extensions/ai-rogue/runtime/renderer-audio-adapter.ts` - Added previous-snapshot routing for low HP, boss reveal, and terminal transition gating.
* `src/extensions/ai-rogue/runtime/renderer.ts` - Passed previous snapshot into audio result dispatch before state mutation.
* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/implementation-notes.md` - Recorded T009 implementation evidence.
* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/tasks.md` - Marked T009 complete.

**Verification**:

* Command/check: `bun run typecheck`
  * Result: PASS - Previous-snapshot adapter signature and renderer call sites typecheck.
  * Evidence: `tsc --noEmit` completed with exit code 0.
* Command/check: Targeted inspection of `dispatchAdaptiveSnapshotRequests()` in `src/extensions/ai-rogue/runtime/renderer-audio-adapter.ts`
  * Result: PASS - Low HP and boss reveal are transition-gated.
  * Evidence: Requests fire on `!isLowHpPressure(previousSnapshot) && isLowHpPressure(snapshot)` and `!hasVisibleBoss(previousSnapshot) && hasVisibleBoss(snapshot)`.
* UI product-surface check: N/A - T009 changed runtime audio routing only; no visible UI changed.
* UI craft check: N/A - T009 did not change a user-facing surface.

**BQC Fixes**:

* Duplicate action prevention: Low HP, boss reveal, and terminal requests now require a previous-to-current transition in the adapter, with engine cooldown still providing in-flight protection (`src/extensions/ai-rogue/runtime/renderer-audio-adapter.ts`).
* State freshness on re-entry: Renderer captures `previousSnapshot` before state mutation so transition checks use fresh before/after state (`src/extensions/ai-rogue/runtime/renderer.ts`).

***

### Task T010 - Preserve existing audio paths while adaptive requests run

**Started**: 2026-06-28 19:34 **Completed**: 2026-06-28 19:35 **Duration**: 1 minute

**Notes**:

* Verified existing audio engine and renderer-adapter tests still pass after adding the adaptive request method, cooldowns, ducking, and adapter routing.
* Confirmed existing theme ambience routing, terminal music ordering, heartbeat updates, mute/volume mix behavior, autoplay queueing, decode/fetch failure fallback, no-Web-Audio silent engine, and disposal behavior remain covered by passing focused tests.
* Confirmed adaptive requests are additive: existing `handleSimulationEvents()`, music crossfades, theme ambience changes, terminal music, and heartbeat calls remain in their prior routing path.

**Files Changed**:

* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/implementation-notes.md` - Recorded T010 verification evidence.
* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/tasks.md` - Marked T010 complete.

**Verification**:

* Command/check: `bunx vitest run src/extensions/ai-rogue/runtime/__tests__/audio.test.ts src/extensions/ai-rogue/runtime/__tests__/renderer-audio-adapter.test.ts`
  * Result: PASS - Existing focused audio and adapter behavior remains intact.
  * Evidence: 2 test files passed; 25 tests passed.
* Command/check: Targeted inspection of `dispatchAudioForResult()` in `src/extensions/ai-rogue/runtime/renderer-audio-adapter.ts`
  * Result: PASS - Existing event SFX, descend music, terminal music, theme ambience, and heartbeat calls remain present.
  * Evidence: `audio.handleSimulationEvents()`, `audio.playMusic()`, `audio.stopThemeAmbience()`, `audio.playThemeAmbience()`, and `updateHeartbeat()` still run through their existing branches.
* UI product-surface check: N/A - T010 was runtime preservation verification only.
* UI craft check: N/A - T010 did not change a user-facing surface.

**BQC Fixes**:

* Contract alignment: Focused tests confirmed existing audio contracts still pass after the adaptive extension (`src/extensions/ai-rogue/runtime/__tests__/audio.test.ts`, `src/extensions/ai-rogue/runtime/__tests__/renderer-audio-adapter.test.ts`).

***

### Task T011 - Extend browser adaptive audio proof

**Started**: 2026-06-28 19:36 **Completed**: 2026-06-28 19:39 **Duration**: 3 minutes

**Notes**:

* Extended the AI Rogue Playwright audio proof to request all seven adaptive moments through a real `createAiRogueAudioEngine()` instance under the fake browser AudioContext.
* Added adaptive provisional cue URL assertions and source-start assertions for combat start, low HP, boss reveal, objective unlock, final defense, victory transition, and defeat transition.
* Added an adaptive request to the no-Web-Audio silent fallback branch to prove it performs no fetches.
* Added product-surface assertions on the Play route so adaptive implementation language does not appear in normal gameplay UI.

**Files Changed**:

* `tests/e2e/ai-rogue-runtime.spec.ts` - Extended browser audio proof harness and assertions for adaptive requests, silent fallback, failed requests, and product-surface copy.
* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/implementation-notes.md` - Recorded T011 implementation evidence.
* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/tasks.md` - Marked T011 complete.

**Verification**:

* Command/check: `bun run typecheck`
  * Result: PASS - Playwright spec edits typecheck.
  * Evidence: `tsc --noEmit` completed with exit code 0.
* Command/check: Targeted inspection of `runAudioPackBrowserProof()` and the desktop/mobile audio proof loop in `tests/e2e/ai-rogue-runtime.spec.ts`
  * Result: PASS - Adaptive URL/source-start assertions, silent fallback request, failed-request capture, and product-surface assertions are present.
  * Evidence: Added `AI_ROGUE_ADAPTIVE_AUDIO_BASENAMES`, `adaptiveUrls`, `adaptiveSourceStarts`, silent `requestAdaptiveAudio()`, and body text checks for adaptive/debug copy.
* UI product-surface check: PASS - Browser proof now asserts the Play route shows `How to play` and does not expose `adaptive audio`, `ducking`, or `sidechain` copy in normal UI.
* UI craft check: N/A - T011 changed proof coverage only, not visual layout.

**BQC Fixes**:

* Product surface discipline: Added route-level proof that adaptive implementation copy stays out of the normal gameplay surface (`tests/e2e/ai-rogue-runtime.spec.ts`).
* Failure path completeness: Added no-Web-Audio silent fallback coverage for adaptive requests (`tests/e2e/ai-rogue-runtime.spec.ts`).

***

### Task T012 - Update durable audio docs and session stub

**Started**: 2026-06-28 19:40 **Completed**: 2026-06-28 19:43 **Duration**: 3 minutes

**Notes**:

* Updated durable game-feel docs to describe typed adaptive requests, cooldown keys, bounded music/theme ambience ducking, `playCue: false` duplicate-cue avoidance, and Session 07 stinger handoff.
* Updated AI Rogue README audio summary to include bounded adaptive request ducking in current behavior.
* Updated the Phase 36 Session 06 stub with implementation contract notes, validation evidence to date, checked prerequisites, and the Session 07 asset-generation handoff.

**Files Changed**:

* `docs/extensions/ai-rogue/game-feel.md` - Documented current adaptive request and ducking behavior.
* `docs/extensions/ai-rogue/README.md` - Updated current audio summary.
* `.spec_system/PRD/phase_36/session_06_adaptive_music_engine_expansion.md` - Recorded contract decisions, evidence, prerequisites, and Session 07 handoff.
* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/implementation-notes.md` - Recorded T012 implementation evidence.
* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/tasks.md` - Marked T012 complete.

**Verification**:

* Command/check: `rg "current runtime does not include|current audio docs explicitly say|Start plays a run-start" docs/extensions/ai-rogue/game-feel.md docs/extensions/ai-rogue/README.md .spec_system/PRD/phase_36/session_06_adaptive_music_engine_expansion.md`
  * Result: PASS - Targeted durable docs no longer contain stale no-ducking current-behavior wording.
  * Evidence: `rg` returned no matches in the targeted files.
* Command/check: `sed -n '120,215p' docs/extensions/ai-rogue/game-feel.md`
  * Result: PASS - Game-feel docs include adaptive request behavior.
  * Evidence: Section lists all seven request IDs, cooldown behavior, ducked lanes, presentation-only routing, duplicate-cue prevention, and Session 07 handoff.
* Command/check: `sed -n '30,155p' .spec_system/PRD/phase_36/session_06_adaptive_music_engine_expansion.md`
  * Result: PASS - Session stub records implemented contract decisions and evidence to date.
  * Evidence: Stub status is `In Progress`, prerequisites are checked, and implementation contract notes are present.
* UI product-surface check: N/A - T012 changed docs only.
* UI craft check: N/A - T012 did not change a user-facing surface.

***

### Task T013 - Add focused audio-engine adaptive tests

**Started**: 2026-06-28 19:44 **Completed**: 2026-06-28 19:47 **Duration**: 3 minutes

**Notes**:

* Added focused audio-engine coverage for adaptive boss reveal cue mapping and music/theme ambience duck targets.
* Added cooldown duplicate-prevention coverage for repeated adaptive requests.
* Added cue-free adaptive ducking coverage for event paths that already emitted provisional SFX, including preference reapplication while ducked.
* Added silent-engine fallback coverage and dispose timer cleanup coverage.

**Files Changed**:

* `src/extensions/ai-rogue/runtime/__tests__/audio.test.ts` - Added adaptive request tests and a gain-target assertion helper.
* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/implementation-notes.md` - Recorded T013 implementation evidence.
* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/tasks.md` - Marked T013 complete.

**Verification**:

* Command/check: `bunx vitest run src/extensions/ai-rogue/runtime/__tests__/audio.test.ts`
  * Result: PASS - Focused audio-engine tests pass with adaptive coverage.
  * Evidence: 1 test file passed; 24 tests passed.
* UI product-surface check: N/A - T013 changed unit tests only.
* UI craft check: N/A - T013 did not change a user-facing surface.

**BQC Fixes**:

* Duplicate action prevention: Added explicit cooldown duplicate-prevention test (`src/extensions/ai-rogue/runtime/__tests__/audio.test.ts`).
* State freshness on re-entry: Added preference reapplication during active ducking test (`src/extensions/ai-rogue/runtime/__tests__/audio.test.ts`).
* Resource cleanup: Added adaptive duck timer cleanup on dispose test (`src/extensions/ai-rogue/runtime/__tests__/audio.test.ts`).
* Failure path completeness: Extended silent no-op engine test to include adaptive requests (`src/extensions/ai-rogue/runtime/__tests__/audio.test.ts`).

***

### Task T014 - Add focused renderer-adapter adaptive tests

**Started**: 2026-06-28 19:48 **Completed**: 2026-06-28 19:51 **Duration**: 3 minutes

**Notes**:

* Added adapter tests for fresh combat-start helper routing, event-derived combat/objective/final/victory/defeat requests, low-HP entry, boss reveal transition, and no-repeat transition guards.
* Extended terminal music ordering assertions to verify adaptive transition requests occur before terminal music playback.
* Updated snapshot fixture helpers so tests can express previous/current player health, boss visibility, run IDs, turns, and terminal state.

**Files Changed**:

* `src/extensions/ai-rogue/runtime/__tests__/renderer-audio-adapter.test.ts` - Added adaptive request derivation and transition guard tests.
* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/implementation-notes.md` - Recorded T014 implementation evidence.
* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/tasks.md` - Marked T014 complete.

**Verification**:

* Command/check: `bunx vitest run src/extensions/ai-rogue/runtime/__tests__/renderer-audio-adapter.test.ts`
  * Result: PASS - Focused renderer adapter tests pass with adaptive coverage.
  * Evidence: 1 test file passed; 10 tests passed.
* UI product-surface check: N/A - T014 changed unit tests only.
* UI craft check: N/A - T014 did not change a user-facing surface.

**BQC Fixes**:

* Duplicate action prevention: Added no-repeat tests for low HP, boss reveal, and terminal transitions when previous/current snapshots do not cross a boundary (`src/extensions/ai-rogue/runtime/__tests__/renderer-audio-adapter.test.ts`).
* Contract alignment: Added all seven adaptive request IDs to adapter test coverage (`src/extensions/ai-rogue/runtime/__tests__/renderer-audio-adapter.test.ts`).

***

### Task T015 - Run focused audio and adapter tests

**Started**: 2026-06-28 19:52 **Completed**: 2026-06-28 19:53 **Duration**: 1 minute

**Notes**:

* Ran the combined focused audio-engine and renderer-adapter suites after implementation and new test additions.
* Confirmed existing behavior and new adaptive request coverage pass together.

**Files Changed**:

* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/implementation-notes.md` - Recorded T015 verification evidence.
* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/tasks.md` - Marked T015 complete.

**Verification**:

* Command/check: `bunx vitest run src/extensions/ai-rogue/runtime/__tests__/audio.test.ts src/extensions/ai-rogue/runtime/__tests__/renderer-audio-adapter.test.ts`
  * Result: PASS - Focused audio and adapter suites pass together.
  * Evidence: 2 test files passed; 34 tests passed.
* UI product-surface check: N/A - T015 was test execution only.
* UI craft check: N/A - T015 did not change a user-facing surface.

***

### Task T016 - Run focused combat and protocol tests

**Started**: 2026-06-28 19:54 **Completed**: 2026-06-28 19:55 **Duration**: 1 minute

**Notes**:

* Adaptive derivation uses existing event cues and snapshot facts, but simulation code was not changed.
* Ran focused simulation-side tests for combat metadata, protocols, compile/final-defense cues, and objective unlock cues to confirm event producers still pass.

**Files Changed**:

* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/implementation-notes.md` - Recorded T016 verification evidence.
* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/tasks.md` - Marked T016 complete.

**Verification**:

* Command/check: `bunx vitest run src/extensions/ai-rogue/runtime/__tests__/combat.test.ts src/extensions/ai-rogue/runtime/__tests__/protocols.test.ts src/extensions/ai-rogue/runtime/__tests__/compile.test.ts src/extensions/ai-rogue/runtime/__tests__/objective-lock.test.ts`
  * Result: PASS - Focused simulation-side event producer tests pass.
  * Evidence: 4 test files passed; 26 tests passed.
* UI product-surface check: N/A - T016 was test execution only.
* UI craft check: N/A - T016 did not change a user-facing surface.

***

### Task T017 - Run desktop and mobile browser adaptive audio proof

**Started**: 2026-06-28 19:56 **Completed**: 2026-06-28 19:58 **Duration**: 2 minutes

**Notes**:

* Ran the targeted Playwright audio proof on desktop and mobile viewports.
* Verified adaptive request provisional cue fetches/source starts, existing enemy/boss/theme audio proof, failed-request capture, silent fallback, page-error capture, and product-surface assertions through the browser test.
* Playwright web-server startup printed transient curl connection failures while probing ports, then started successfully and both tests passed.

**Files Changed**:

* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/implementation-notes.md` - Recorded T017 browser verification evidence.
* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/tasks.md` - Marked T017 complete.

**Verification**:

* Command/check: `bunx playwright test tests/e2e/ai-rogue-runtime.spec.ts -g "AI Rogue browser audio pack fetches enemy, boss, and theme audio"`
  * Result: PASS - Desktop and mobile browser audio proof passed.
  * Evidence: 2 Chromium tests passed: desktop in 4.8s and mobile in 2.5s.
* UI product-surface check: PASS - Targeted Playwright proof asserts `How to play` is visible and adaptive/debug implementation words are absent from the normal Play route body.
* UI craft check: PASS - The same desktop/mobile proof reached runtime-ready Play route viewports without page errors or failed requests.

***

### Task T018 - Run lint, typecheck, script typecheck, asset-size validation, and targeted formatting

**Started**: 2026-06-28 19:59 **Completed**: 2026-06-28 20:03 **Duration**: 4 minutes

**Notes**:

* Applied targeted Prettier formatting to touched runtime, test, docs, and session files.
* Ran repo lint, app typecheck, script typecheck, and asset-size validation.
* No new assets were added; asset validation still passed within configured limits.

**Files Changed**:

* `src/extensions/ai-rogue/runtime/audio.ts` - Targeted formatting after adaptive engine edits.
* `src/extensions/ai-rogue/runtime/renderer-audio-adapter.ts` - Targeted formatting after adaptive adapter edits.
* `src/extensions/ai-rogue/runtime/renderer.ts` - Checked by targeted formatting.
* `src/extensions/ai-rogue/runtime/__tests__/audio.test.ts` - Checked by targeted formatting.
* `src/extensions/ai-rogue/runtime/__tests__/renderer-audio-adapter.test.ts` - Targeted formatting after adapter test edits.
* `tests/e2e/ai-rogue-runtime.spec.ts` - Targeted formatting after browser proof edits.
* `docs/extensions/ai-rogue/game-feel.md` - Checked by targeted formatting.
* `docs/extensions/ai-rogue/README.md` - Checked by targeted formatting.
* `.spec_system/PRD/phase_36/session_06_adaptive_music_engine_expansion.md` - Checked by targeted formatting.
* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/tasks.md` - Targeted formatting after checklist updates.
* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/implementation-notes.md` - Targeted formatting after evidence updates.

**Verification**:

* Command/check: `bunx prettier --write src/extensions/ai-rogue/runtime/audio.ts src/extensions/ai-rogue/runtime/renderer-audio-adapter.ts src/extensions/ai-rogue/runtime/renderer.ts src/extensions/ai-rogue/runtime/__tests__/audio.test.ts src/extensions/ai-rogue/runtime/__tests__/renderer-audio-adapter.test.ts tests/e2e/ai-rogue-runtime.spec.ts docs/extensions/ai-rogue/game-feel.md docs/extensions/ai-rogue/README.md .spec_system/PRD/phase_36/session_06_adaptive_music_engine_expansion.md .spec_system/specs/phase36-session06-adaptive-music-engine-expansion/tasks.md .spec_system/specs/phase36-session06-adaptive-music-engine-expansion/implementation-notes.md`
  * Result: PASS - Targeted formatting completed.
  * Evidence: Prettier completed for all listed files.
* Command/check: `bun run lint`
  * Result: PASS - ESLint completed.
  * Evidence: `eslint .` exited 0.
* Command/check: `bun run typecheck`
  * Result: PASS - App TypeScript check completed.
  * Evidence: `tsc --noEmit` exited 0.
* Command/check: `bun run typecheck:scripts`
  * Result: PASS - Script TypeScript check completed.
  * Evidence: `tsc --noEmit -p tsconfig.scripts.json` exited 0.
* Command/check: `bash scripts/check-asset-sizes.sh`
  * Result: PASS - Asset-size validation completed.
  * Evidence: `OK: All assets within configured size limits (total: 15M)`.
* UI product-surface check: N/A - T018 was quality-gate execution only; T017 covered the Play route product surface.
* UI craft check: N/A - T018 did not change visual UI.

***

### Task T019 - Validate ASCII/LF, browser review notes, and handoff

**Started**: 2026-06-28 20:04 **Completed**: 2026-06-28 20:08 **Duration**: 4 minutes

**Notes**:

* Ran ASCII and CRLF scans across touched runtime, test, docs, phase stub, and active session files.
* Recorded browser review notes from the targeted desktop/mobile Playwright proof.
* Updated implementation notes, checklist completion state, phase session evidence, caveats, and next-session handoff.

**Files Changed**:

* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/implementation-notes.md` - Added final task evidence, command summary, caveats, and handoff.
* `.spec_system/specs/phase36-session06-adaptive-music-engine-expansion/tasks.md` - Marked T019 and completion checklist complete.
* `.spec_system/PRD/phase_36/session_06_adaptive_music_engine_expansion.md` - Updated status and final implementation evidence.

**Verification**:

* Command/check: `perl -ne 'print "$ARGV:$.:$_" if /[^\x00-\x7F]/' [touched files]; perl -ne 'print "$ARGV:$.:CR\n" if /\r/' [touched files]`
  * Result: PASS - No non-ASCII characters or CRLF markers found.
  * Evidence: Command produced no output for the checked files.
* Command/check: `git status --short`
  * Result: PASS - Worktree changes reviewed and scoped to active implementation plus pre-existing spec-system state.
  * Evidence: Modified runtime, tests, docs, phase stub, `.spec_system/state.json`, and untracked active session spec folder are present; no reset was performed.
* UI product-surface check: PASS - T017 Playwright proof covered desktop and mobile Play route product-surface assertions with no page errors or failed requests.
* UI craft check: PASS - T017 browser proof reached runtime-ready desktop and mobile Play route viewports without product-surface debug copy.

***

## Manual Browser Review Notes

* Desktop Chromium proof opened `/extensions/ai-rogue/play`, reached runtime-ready state, started the runtime, and exercised committed enemy, boss, theme ambience, and adaptive provisional cue paths through the fake browser AudioContext.
* Mobile Chromium proof repeated the same audio proof at 390x844.
* Both proofs captured page errors and failed requests; both arrays were empty.
* The normal Play route showed product-facing `How to play` content and did not expose adaptive-audio, ducking, or sidechain implementation copy.
* Acoustic fatigue, loudness, and masking still require human listening in Session 08; headless tests prove routing and fallback, not perceived mix quality.

## Command Summary

* `bun run typecheck` - PASS
* `bunx vitest run src/extensions/ai-rogue/runtime/__tests__/audio.test.ts` - PASS, 24 tests
* `bunx vitest run src/extensions/ai-rogue/runtime/__tests__/renderer-audio-adapter.test.ts` - PASS, 10 tests
* `bunx vitest run src/extensions/ai-rogue/runtime/__tests__/audio.test.ts src/extensions/ai-rogue/runtime/__tests__/renderer-audio-adapter.test.ts` - PASS, 34 tests
* `bunx vitest run src/extensions/ai-rogue/runtime/__tests__/combat.test.ts src/extensions/ai-rogue/runtime/__tests__/protocols.test.ts src/extensions/ai-rogue/runtime/__tests__/compile.test.ts src/extensions/ai-rogue/runtime/__tests__/objective-lock.test.ts` - PASS, 26 tests
* `bunx playwright test tests/e2e/ai-rogue-runtime.spec.ts -g "AI Rogue browser audio pack fetches enemy, boss, and theme audio"` - PASS, 2 Chromium tests
* `bun run lint` - PASS
* `bun run typecheck:scripts` - PASS
* `bash scripts/check-asset-sizes.sh` - PASS, total 15M
* Targeted ASCII/LF scan - PASS

## Caveats And Handoff

* Dedicated adaptive stinger assets are not part of Session 06. Session 07 should replace provisional cue mapping behind the same request IDs.
* No schema, save, dependency, asset, simulation RNG, scoring, public demo bridge, worker, collector, analytics, or remote content path changed.
* Human acoustic review remains Session 08 scope because automated tests cannot judge fatigue, loudness balance, or masking.

Next command: `creview` Reason: implementation is complete and all uncommitted changes must be reviewed and repaired before validation.


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