> For the complete documentation index, see [llms.txt](https://faction-os.gitbook.io/faction-os-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://faction-os.gitbook.io/faction-os-docs/.spec_system/archive/sessions/phase04-session05-browser-audio-runtime-and-controls/implementation-notes.md). # Implementation Notes **Session ID**: `phase04-session05-browser-audio-runtime-and-controls` **Package**: apps/web **Started**: 2026-05-29 20:27 **Last Updated**: 2026-05-29 21:50 *** ## Session Progress | Metric | Value | | ------------------- | ------- | | Tasks Completed | 22 / 22 | | Estimated Remaining | 0 hours | | Blockers | 0 | *** ## Task Log ### 2026-05-29 - Session Start **Environment verified**: * [x] Prerequisites confirmed * [x] Tools available * [x] Directory structure ready * [x] Package context resolved to `apps/web` *** ### Task T001 - Verify prerequisites and current audio/catalog files **Started**: 2026-05-29 20:25 **Completed**: 2026-05-29 20:27 **Duration**: 2 minutes **Notes**: * Verified active session from spec state: `phase04-session05-browser-audio-runtime-and-controls`. * Verified monorepo package context from `spec.md`: `apps/web`. * Verified workspace prerequisites, package registration, Node, npm, jq, and git availability with the spec scripts. * Reviewed Phase 04 Session 02, Session 03, and Session 04 session stubs for catalog contracts, draft generation deferral, and visual promotion constraints. * Reviewed ADR 0001 and ADR 0004: runtime remains local-first, and `EXAMPLES/` media remains quarantined. * Reviewed current app audio/catalog files before edits: settings store, voice synth helper, voice bark subscription, settings drawer, hero drawer Speak action, command palette, and app media catalog. **Files Changed**: * `.spec_system/specs/phase04-session05-browser-audio-runtime-and-controls/implementation-notes.md` - Started implementation log and recorded prerequisite verification. **BQC Fixes**: * N/A - setup and verification only. *** ### Task T002 - Record current audio settings and catalog behavior **Started**: 2026-05-29 20:27 **Completed**: 2026-05-29 20:28 **Duration**: 1 minute **Notes**: * `useSettingsStore` currently persists `audioEnabled` as a boolean and defaults it to `true`; malformed or missing values hydrate from that default. * `voiceSynth` currently creates one shared `AudioContext` plus `masterGain`, returns `void`, silently no-ops when unsupported, and swallows resume failures. * `useVoiceBarks` currently listens for first pointerdown to unlock audio, rate-limits by hero timestamp, and calls `playBark` only when `audioEnabled` is true. * `SettingsDrawer` currently exposes a single "Voice barks" toggle without browser support, unlock, blocked, failed, or volume status. * `HeroDetailDrawer` currently disables Speak when audio is muted and otherwise calls `playBark` directly; no structured result copy or duplicate in-flight guard is surfaced. * `CommandPalette` currently labels the audio setting as "Enable voice barks" or "Disable voice barks" and toggles the persisted boolean directly. * `mediaCatalog` contains `draft_audio` records for public-demo speech replacement and full-app audio/SFX, both with empty outputs and blocked or deferred release gates. **Files Changed**: * `.spec_system/specs/phase04-session05-browser-audio-runtime-and-controls/implementation-notes.md` - Recorded current behavior baseline. **BQC Fixes**: * N/A - behavior documentation only. *** ### Task T003 - Create security compliance artifact **Started**: 2026-05-29 20:28 **Completed**: 2026-05-29 20:29 **Duration**: 1 minute **Notes**: * Created the session security artifact for browser-local synthetic audio runtime scope. * Recorded the privacy boundary, `EXAMPLES/` quarantine rule, durable-versus-transient storage boundary, and blocked file-backed audio policy. * Added a compliance checklist that will be updated before validate handoff. **Files Changed**: * `.spec_system/specs/phase04-session05-browser-audio-runtime-and-controls/security-compliance.md` - Added security and compliance baseline. * `.spec_system/specs/phase04-session05-browser-audio-runtime-and-controls/implementation-notes.md` - Logged setup completion. **BQC Fixes**: * N/A - compliance artifact only. *** ### Task T004 - Create audio runtime boundary **Started**: 2026-05-29 20:29 **Completed**: 2026-05-29 20:36 **Duration**: 7 minutes **Notes**: * Added `audioRuntime.ts` with stable runtime result types for muted, unsupported, locked, unlocked, playing, blocked, failed, and unavailable outcomes. * Added bounded volume normalization, request schema validation, redacted result details, visible-equivalent copy, and a Web Audio synth adapter boundary. * Added reusable duplicate cue guard helpers with release, prefix cleanup, and in-flight snapshots. * Added low-level synth support-state exports needed by the runtime boundary. **Files Changed**: * `apps/web/src/lib/audioRuntime.ts` - Created runtime result mapping, support checks, visible copy, schema validation, and duplicate guard helpers. * `apps/web/src/lib/voiceSynth.ts` - Added support-state and structured result types used by the runtime boundary. **BQC Fixes**: * Trust boundary enforcement: audio cue requests are validated before playback (`apps/web/src/lib/audioRuntime.ts`). * Duplicate action prevention: cue guard blocks duplicate cue IDs while in flight (`apps/web/src/lib/audioRuntime.ts`). * Error information boundaries: runtime details use stable redacted copy instead of raw browser errors (`apps/web/src/lib/audioRuntime.ts`). *** ### Task T005 - Create transient audio runtime store **Started**: 2026-05-29 20:36 **Completed**: 2026-05-29 20:39 **Duration**: 3 minutes **Notes**: * Added a transient Zustand store for browser audio status, last cue, blocked/failed timestamps, and in-flight cue IDs. * Added runtime actions for status refresh, unlock, guarded cue playback, single-cue cleanup, prefix cleanup, and full runtime cleanup. * Kept runtime state out of the persisted settings store. **Files Changed**: * `apps/web/src/store/useAudioRuntimeStore.ts` - Created transient audio runtime state and action helpers. **BQC Fixes**: * Resource cleanup: guard timers and in-flight cue IDs are cleared through `clearCue`, `clearCuePrefix`, `cleanupRuntime`, and `resetRuntime`. * Duplicate action prevention: `playCue` uses the runtime guard before calling Web Audio. * Failure path completeness: unexpected runtime exceptions map to a stable failed result. *** ### Task T006 - Extend settings audio defaults and persistence **Started**: 2026-05-29 20:39 **Completed**: 2026-05-29 20:42 **Duration**: 3 minutes **Notes**: * Changed new settings snapshots to default `audioEnabled` to `false`. * Added bounded `audioVolume` persistence with normalization through the audio runtime volume helper. * Added stale snapshot recovery for legacy nested audio settings and denied, restricted, revoked, blocked, enabled, and disabled string states. * Kept malformed or missing audio fields on safe defaults. **Files Changed**: * `apps/web/src/store/useSettingsStore.ts` - Added opt-in audio defaults, bounded volume, persistence, reset, and stale snapshot recovery. **BQC Fixes**: * State freshness on re-entry: persisted settings normalize stale/malformed audio fields on hydration. * Trust boundary enforcement: localStorage audio fields are type-checked and bounded before entering store state. *** ### Task T007 - Refactor voice synth structured results and cleanup **Started**: 2026-05-29 20:42 **Completed**: 2026-05-29 20:45 **Duration**: 3 minutes **Notes**: * Refactored `playBark` and `unlockAudio` to return structured support, locked, blocked, failed, unlocked, and playing results. * Added support-state inspection without forcing context creation. * Added guarded context creation, explicit resume failure mapping, and Web Audio node cleanup after cue completion. * Preserved the synthetic Web Audio bark path only; no file-backed audio playback was added. **Files Changed**: * `apps/web/src/lib/voiceSynth.ts` - Returned structured synth results and added cleanup-safe node handling. **BQC Fixes**: * Resource cleanup: oscillator, LFO, gain, and filter nodes disconnect after completion or creation failure. * Failure path completeness: unsupported context, context creation failure, resume blocking, closed context, and node creation failure return structured results. * Error information boundaries: raw browser exceptions are not exposed from synth helpers. *** ### Task T008 - Add audio runtime unit tests **Started**: 2026-05-29 20:45 **Completed**: 2026-05-29 20:51 **Duration**: 6 minutes **Notes**: * Added focused runtime tests for bounded volume, schema validation, muted and unsupported short-circuiting, status mapping, playback result copy, unlock mapping, redacted failure details, and duplicate cue guards. * Used adapter injection so tests do not rely on real browser Web Audio support in happy-dom. **Files Changed**: * `apps/web/tests/audioRuntime.test.ts` - Added runtime and duplicate guard unit coverage. **BQC Fixes**: * Trust boundary enforcement: tests assert invalid cue requests do not reach playback. * Duplicate action prevention: tests assert duplicate cue IDs are blocked until release. * Error information boundaries: tests assert unknown raw failure text is redacted. *** ### Task T009 - Update settings store tests **Started**: 2026-05-29 20:51 **Completed**: 2026-05-29 20:54 **Duration**: 3 minutes **Notes**: * Updated settings store tests for default-off audio, persisted opt-in, bounded volume persistence, stale nested audio snapshots, malformed storage, reset defaults, and denied/restricted/revoked recovery. **Files Changed**: * `apps/web/tests/useSettingsStore.test.ts` - Updated persistence and recovery coverage for opt-in audio and bounded volume. **BQC Fixes**: * State freshness on re-entry: tests cover stale and malformed localStorage snapshots. * Trust boundary enforcement: tests cover clamped audio volume and restricted permission strings. *** ### Task T010 - Wire hero transition barks through runtime **Started**: 2026-05-29 20:54 **Completed**: 2026-05-29 20:59 **Duration**: 5 minutes **Notes**: * Routed hero state-transition cues through `useAudioRuntimeStore.playCue`. * Preserved per-hero rate limiting and added runtime duplicate prevention through cue IDs. * Routed first pointerdown unlock through the audio runtime store. * Added cleanup for hero-transition in-flight cues when the subscription unmounts. **Files Changed**: * `apps/web/src/store/useVoiceBarks.ts` - Replaced direct synth calls with runtime store actions and cleanup. **BQC Fixes**: * Duplicate action prevention: hero transition cue IDs are guarded while in flight. * Resource cleanup: in-flight hero-transition cues are released on unsubscribe. * Failure path completeness: muted, unsupported, blocked, failed, and unavailable outcomes are recorded as runtime results instead of silent synth no-ops. *** ### Task T011 - Update Settings audio controls **Started**: 2026-05-29 20:59 **Completed**: 2026-05-29 21:06 **Duration**: 7 minutes **Notes**: * Replaced the simple voice-bark toggle with explicit opt-in audio cues, runtime status, bounded volume, test cue, last-cue copy, and disabled-state feedback. * Routed enable and test actions through the transient audio runtime store. * Resetting settings now also resets transient audio runtime state. * Kept browser audio failure copy visible and redacted through runtime result captions and toasts. **Files Changed**: * `apps/web/src/components/SettingsDrawer.tsx` - Added audio runtime status, opt-in toggle behavior, volume slider, test cue, reset handling, and accessible labels. **BQC Fixes**: * Duplicate action prevention: the test cue button observes in-flight cue state. * Failure path completeness: muted, unsupported, blocked, failed, and unavailable states surface as visible status copy and toast feedback. * Accessibility and platform compliance: audio toggle, slider, status, and test cue have labels and disabled-state copy. *** ### Task T012 - Update Hero Speak runtime behavior **Started**: 2026-05-29 21:06 **Completed**: 2026-05-29 21:11 **Duration**: 5 minutes **Notes**: * Routed the hero Speak action through `useAudioRuntimeStore.playCue`. * Added disabled reasons for audio off, unsupported audio, and active duplicate cue state. * Added last-cue and visible fallback copy directly in the hero drawer footer. * Added toast feedback from structured runtime results. **Files Changed**: * `apps/web/src/components/HeroDetailDrawer.tsx` - Replaced direct synth playback with runtime results, duplicate guard state, disabled reasons, and visible result copy. **BQC Fixes**: * Duplicate action prevention: Speak is disabled while its cue ID is in flight. * Failure path completeness: runtime result captions and toasts cover muted, unsupported, blocked, failed, and unavailable outcomes. * Accessibility and platform compliance: Speak uses `aria-describedby` for live disabled/result context. *** ### Task T013 - Update command palette audio labels **Started**: 2026-05-29 21:11 **Completed**: 2026-05-29 21:12 **Duration**: 1 minute **Notes**: * Renamed the palette audio toggle from voice barks to explicit audio cues. * Added detail and keywords that frame the command as synthetic local Web Audio rather than file-backed media. **Files Changed**: * `apps/web/src/lib/commandPalette.ts` - Updated audio command label, detail, and keywords. **BQC Fixes**: * Contract alignment: command labels now match the Settings audio surface and Session 05 runtime scope. *** ### Task T014 - Pass updated audio state through command palette **Started**: 2026-05-29 21:12 **Completed**: 2026-05-29 21:15 **Duration**: 3 minutes **Notes**: * Kept the command catalog fed by current `audioEnabled` state. * Wrapped the palette audio toggle action so it updates persisted settings, refreshes transient audio status, and emits visible toast feedback. * Preserved existing settings drawer deep-link command behavior. **Files Changed**: * `apps/web/src/components/CommandPalette.tsx` - Added runtime status refresh and toast feedback around the audio toggle handler. **BQC Fixes**: * State freshness on re-entry: palette toggles refresh runtime status immediately after changing audio preference. * Failure path completeness: palette toggles surface visible status feedback instead of silently changing playback eligibility. *** ### Task T015 - Keep file-backed audio catalog records blocked **Started**: 2026-05-29 21:15 **Completed**: 2026-05-29 21:17 **Duration**: 2 minutes **Notes**: * Updated draft audio catalog release gates to clarify that Session 05 approves only synthetic local Web Audio runtime controls. * Kept public-demo speech, full-app voice, SFX, alert, celebration, and music file-backed media blocked until later approval gates provide rights, loudness, metadata, attribution, fallback, and budget evidence. **Files Changed**: * `apps/web/src/data/mediaCatalog.ts` - Updated draft audio release-gate blockers and fallback notes. **BQC Fixes**: * Contract alignment: catalog state matches runtime implementation and docs policy; no file-backed audio output was promoted. *** ### Task T016 - Add Settings audio component tests **Started**: 2026-05-29 21:17 **Completed**: 2026-05-29 21:26 **Duration**: 9 minutes **Notes**: * Added Settings audio component tests for default opt-in state, volume, unsupported status, blocked test cue feedback, failed redaction, and reset behavior. * Mocked the transient audio runtime store boundary so happy-dom does not require real Web Audio. **Files Changed**: * `apps/web/tests/SettingsAudio.test.tsx` - Added focused Settings audio UI coverage. **BQC Fixes**: * Failure path completeness: tests assert visible copy for muted, unsupported, blocked, and failed states. * Accessibility and platform compliance: tests exercise labelled toggle, slider, disabled copy, and reset button behavior. * Error information boundaries: tests assert failed status does not render raw path-like details. *** ### Task T017 - Update Hero Speak tests **Started**: 2026-05-29 21:26 **Completed**: 2026-05-29 21:33 **Duration**: 7 minutes **Notes**: * Replaced direct synth mocks with transient audio runtime store mocks. * Updated Speak tests for enabled playback requests, muted disabled state, failed, blocked, unavailable, and duplicate in-flight behavior. **Files Changed**: * `apps/web/tests/HeroDetailDrawer.test.tsx` - Updated Speak coverage for runtime results and duplicate-click prevention. **BQC Fixes**: * Duplicate action prevention: tests assert Speak is disabled while its cue ID is active. * Failure path completeness: tests assert visible copy for failed, blocked, and unavailable runtime results. * Contract alignment: tests now match the runtime store boundary instead of the low-level synth helper. *** ### Task T018 - Update web audio docs **Started**: 2026-05-29 21:33 **Completed**: 2026-05-29 21:36 **Duration**: 3 minutes **Notes**: * Documented explicit audio opt-in, bounded volume, runtime status states, and visible equivalents in the web README. * Clarified that Session 05 adds synthetic local Web Audio controls only and does not promote file-backed audio. * Corrected public-demo media parity handoff to Session 06. **Files Changed**: * `apps/web/README_web.md` - Updated Settings and Phase 04 media boundary documentation. **BQC Fixes**: * Contract alignment: documentation now matches runtime scope, settings persistence, and file-backed audio deferral. *** ### Task T019 - Update media docs with Session 05 audio runtime notes **Started**: 2026-05-29 21:36 **Completed**: 2026-05-29 21:40 **Duration**: 4 minutes **Notes**: * Added Session 05 browser audio runtime documentation to `docs/media-assets.md`. * Documented default-off audio, durable versus transient state, runtime result states, visible equivalents, cleanup expectations, and blocked file-backed audio handoff. * Updated Phase 04 handoff language for Session 05, Session 06, and Session 07 responsibilities. **Files Changed**: * `docs/media-assets.md` - Added Session 05 audio runtime notes and blocked file-backed asset policy. **Out-of-Scope Files** (files outside declared package): * `docs/media-assets.md` - Required by T019 as cross-package media documentation for this app-scoped session. **BQC Fixes**: * Contract alignment: media docs now match app runtime behavior and file-backed media deferral. *** ### Task T020 - Run focused tests and web typecheck **Started**: 2026-05-29 21:40 **Completed**: 2026-05-29 21:45 **Duration**: 5 minutes **Notes**: * Ran focused audio, settings, hero detail, and command palette tests. * Ran web package typecheck. * Initial focused test run exposed a Settings audio test setup issue where the mocked refresh action overwrote injected failed status; corrected the test setup and reran successfully. **Commands**: * `npx vitest run apps/web/tests/audioRuntime.test.ts apps/web/tests/useSettingsStore.test.ts apps/web/tests/SettingsAudio.test.tsx apps/web/tests/HeroDetailDrawer.test.tsx apps/web/tests/CommandPalette.test.tsx` - Pass, 5 files, 88 tests. * `npm --workspace apps/web run typecheck` - Pass. **Files Changed**: * `apps/web/tests/CommandPalette.test.tsx` - Added audio cue label and toggle coverage. * `apps/web/tests/SettingsAudio.test.tsx` - Corrected failed-status test setup. * `.spec_system/specs/phase04-session05-browser-audio-runtime-and-controls/implementation-notes.md` - Logged verification. **BQC Fixes**: * Failure path completeness: test setup now verifies failed status after status refresh. * Contract alignment: command palette tests assert explicit audio cue labels and opt-in toggle behavior. *** ### Task T021 - Run media/catalog gates **Started**: 2026-05-29 21:45 **Completed**: 2026-05-29 21:47 **Duration**: 2 minutes **Notes**: * Confirmed draft manifest checks pass. * Confirmed visual promotion check passes and no file-backed audio promotion was introduced. * Visual gate reported existing warning-only metadata and non-release blocker records for conditional visual assets; command exited successfully. **Commands**: * `npm run media:drafts:check` - Pass. * `npm run media:visual:check` - Pass with 33 warnings for existing conditional visual metadata and non-release blocker records. **Files Changed**: * `.spec_system/specs/phase04-session05-browser-audio-runtime-and-controls/implementation-notes.md` - Logged media gate verification. **BQC Fixes**: * Contract alignment: media gates confirm draft and visual promotion constraints remain intact. *** ### Task T022 - Run final format, lint, ASCII/LF, privacy, and quarantine checks **Started**: 2026-05-29 21:47 **Completed**: 2026-05-29 21:50 **Duration**: 3 minutes **Notes**: * Ran targeted Biome formatting on touched code and test files. * Ran repository format and lint checks. * Ran secret scan. * Ran ASCII/LF checks for all files changed in this session. * Ran a runtime quarantine check confirming `apps/web/src` has no file-backed audio references (`new Audio`, Howler, MP3/WAV paths, speech asset paths, or public-demo speech paths). * Initial ASCII/LF check caught non-ASCII punctuation in touched comments and tests; replaced it with ASCII equivalents and reran successfully. **Commands**: * `npx biome format --write ...` - Pass, fixed 7 files. * `npm run format:check` - Pass. * `npm run lint` - Pass. * `npm run security:secrets` - Pass. * ASCII/LF check - Pass for 20 touched/session files. * File-backed audio runtime reference check in `apps/web/src` - Pass. **Files Changed**: * `apps/web/src/lib/voiceSynth.ts` - Replaced non-ASCII comment punctuation. * `apps/web/src/store/useVoiceBarks.ts` - Replaced non-ASCII comment punctuation and refreshed runtime-boundary comment. * `apps/web/tests/HeroDetailDrawer.test.tsx` - Replaced non-ASCII test/comment punctuation. * `.spec_system/specs/phase04-session05-browser-audio-runtime-and-controls/security-compliance.md` - Marked compliance checklist complete. * `.spec_system/specs/phase04-session05-browser-audio-runtime-and-controls/implementation-notes.md` - Logged final checks. **BQC Fixes**: * Error information boundaries: final secret scan passed. * Contract alignment: quarantine check confirmed no file-backed audio runtime references were added under `apps/web/src`. *** --- # Agent Instructions This documentation is published with GitBook. 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