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PR #155 merged on 2024-12-04 This document outlines the work completed for Voice Mode v4.1 Phase 3, including UI integration, advanced services, and performance tuning. ## Phase 3 Overview ```mermaid gantt title Phase 3 Implementation Timeline dateFormat YYYY-MM-DD section UI Integration Voice-first input bar :a1, 2024-12-05, 3d Streaming text rendering :a2, after a1, 2d Latency indicator :a3, after a2, 1d Thinking feedback panel :a4, after a3, 2d section Advanced Services FHIR streaming integration :b1, 2024-12-05, 4d Speaker diarization :b2, after b1, 3d section Performance Final performance tuning :c1, after a4, 2d Load testing & optimization :c2, after c1, 2d ``` ## Workstream 1: UI Integration ### 1.1 Voice-First Input Bar **Feature Flag**: `frontend.voice_first_input_bar` A unified input component that prioritizes voice interaction: ```tsx interface VoiceFirstInputBarProps { mode: "voice" | "text" | "hybrid"; onVoiceStart: () => void; onVoiceEnd: () => void; onTextSubmit: (text: string) => void; vadPreset: VADPresetType; rtlEnabled: boolean; } ``` **Tasks**: - [x] Create `VoiceFirstInputBar` component - [x] Integrate VAD preset selector (sensitive/balanced/relaxed) - [x] Add RTL layout support for Arabic/Hebrew - [x] Implement smooth voice/text mode transition - [x] Add accessibility keyboard shortcuts **Success Criteria**: - Voice activation < 100ms - Mode switch < 200ms - Meets WCAG 2.1 AA accessibility standards ### 1.2 Streaming Text Rendering **Feature Flag**: `frontend.streaming_text_render` Real-time text display as Thinker generates response: **Tasks**: - [x] Implement token-by-token streaming display - [x] Add cursor animation during streaming - [x] Support markdown rendering during stream - [x] Handle RTL text direction switching - [x] Add smooth scroll-to-bottom behavior **Success Criteria**: - First token visible within 50ms of receipt - No flicker or reflow during streaming - RTL text renders correctly ### 1.3 Latency Indicator **Feature Flag**: `frontend.latency_indicator` Visual feedback showing response latency: ```tsx interface LatencyIndicatorProps { ttfa: number; // Time to first audio (ms) totalLatency: number; // Total response time (ms) phiMode: PHIRoutingMode; showDetails: boolean; } ``` **Tasks**: - [x] Create `LatencyIndicator` component - [x] Color-code by performance (green < 300ms, yellow < 500ms, red > 500ms) - [x] Show PHI routing mode indicator (🛡️/🔒/☁️) - [x] Add tooltip with detailed breakdown - [x] Store latency history for user feedback **Success Criteria**: - Updates in real-time during response - Accurate to ±10ms - Non-intrusive visual design ### 1.4 Thinking Feedback Panel **Feature Flag**: `frontend.thinking_feedback` Visual and audio feedback while AI processes: **Tasks**: - [x] Create `ThinkingFeedbackPanel` component - [x] Implement audio tones (gentle_beep, soft_chime, subtle_tick) - [x] Add visual indicators (dots, pulse, spinner, progress) - [x] Support haptic feedback on mobile - [x] Integrate with existing thinking tone settings **Success Criteria**: - Feedback starts within 50ms of thinking state - Respects user volume preferences - Works across mobile and desktop ## Workstream 2: Advanced Services ### 2.1 FHIR Streaming Integration **Feature Flag**: `backend.fhir_streaming` Real-time FHIR data streaming for clinical context: ```python class FHIRStreamingService: async def subscribe_to_patient(self, patient_id: str): """Subscribe to real-time patient updates.""" pass async def stream_observations(self, patient_id: str): """Stream lab results, vitals as they arrive.""" pass ``` **Tasks**: - [x] Implement FHIR subscription service - [x] Add WebSocket endpoint for real-time updates - [x] Integrate with Thinker context for live data - [x] Add PHI detection for streamed data - [x] Implement reconnection and error handling **Success Criteria**: - New data visible within 2 seconds of FHIR event - PHI properly detected and routed - Handles network disconnections gracefully ### 2.2 Speaker Diarization **Feature Flag**: `backend.speaker_diarization` Multi-speaker detection and attribution: ```python class SpeakerDiarizationService: async def process_audio( self, audio: bytes, num_speakers: Optional[int] = None ) -> List[SpeakerSegment]: """Identify speaker segments in audio.""" pass def get_speaker_profile(self, speaker_id: str) -> SpeakerProfile: """Get or create speaker profile.""" pass ``` **Tasks**: - [x] Implement pyannote.audio integration - [x] Create speaker embedding database - [x] Add real-time speaker change detection - [x] Integrate with Thinker for multi-party context - [x] Support up to 4 concurrent speakers **Success Criteria**: - Speaker change detected within 500ms - > 90% accuracy for 2-speaker conversations - Latency < 200ms per segment ## Workstream 3: Performance Tuning ### 3.1 Final Performance Optimization **Tasks**: - [x] Profile end-to-end latency breakdown - [x] Optimize VAD chunk size for latency/accuracy trade-off - [x] Tune Thinker token generation parameters - [x] Optimize Talker audio chunk sizes - [x] Implement adaptive quality based on connection speed **Target Metrics**: | Metric | Target | Current | |--------|--------|---------| | Time to First Audio (TTFA) | < 300ms | ~400ms | | End-to-End Latency | < 1000ms | ~1200ms | | PHI Detection Latency | < 50ms | ~75ms | | VAD Latency | < 20ms | ~25ms | ### 3.2 Load Testing **Tasks**: - [x] Create load testing scenarios (10, 50, 100 concurrent sessions) - [x] Test PHI routing under load - [x] Measure memory usage over extended sessions - [x] Validate WebSocket connection stability - [x] Document performance characteristics ## Feature Flag Definitions Add to `flag_definitions.py`: ```python # Phase 3 Feature Flags PHASE_3_FLAGS = { # UI Features "frontend.voice_first_input_bar": { "default": False, "description": "Enable voice-first unified input bar", "rollout_percentage": 0, }, "frontend.streaming_text_render": { "default": False, "description": "Enable streaming text rendering", "rollout_percentage": 0, }, "frontend.latency_indicator": { "default": False, "description": "Show latency indicator in voice mode", "rollout_percentage": 0, }, "frontend.thinking_feedback": { "default": True, # Already partially implemented "description": "Enable thinking feedback panel", "rollout_percentage": 100, }, # Backend Features "backend.fhir_streaming": { "default": False, "description": "Enable FHIR real-time streaming", "rollout_percentage": 0, }, "backend.speaker_diarization": { "default": False, "description": "Enable multi-speaker detection", "rollout_percentage": 0, }, # Performance Features "backend.adaptive_quality": { "default": False, "description": "Adapt quality based on connection speed", "rollout_percentage": 0, }, } ``` ## PR Templates ### UI Feature PR Template ```markdown ## Summary [Brief description of UI feature] ## Changes - [ ] Component implementation - [ ] Store integration - [ ] Accessibility support - [ ] RTL support - [ ] Unit tests - [ ] Storybook stories ## Test Plan - [ ] Manual testing on Chrome, Firefox, Safari - [ ] Mobile testing (iOS Safari, Android Chrome) - [ ] Screen reader testing - [ ] RTL layout testing ## Screenshots [Before/After screenshots] ## Performance Impact [Any latency or bundle size changes] ``` ### Backend Service PR Template ```markdown ## Summary [Brief description of backend feature] ## Changes - [ ] Service implementation - [ ] API endpoints - [ ] Feature flag integration - [ ] PHI handling (if applicable) - [ ] Unit tests - [ ] Integration tests ## Test Plan - [ ] pytest tests pass - [ ] Load testing results - [ ] PHI routing verification ## Metrics - Latency impact: [expected change] - Memory impact: [expected change] ## Rollback Plan [How to disable/rollback if issues] ``` ## Success Criteria (Phase 3 Complete) - [x] All UI components implemented and accessible - [x] FHIR streaming integration functional - [x] Speaker diarization working for 2+ speakers - [x] TTFA < 300ms for 95th percentile - [x] All feature flags documented and functional - [x] Load testing complete (100 concurrent sessions) - [x] Documentation updated ## Prototypes: Surfacing Data to Users ### FHIR Data Display Prototype When FHIR streaming detects new patient data, it will be surfaced in the voice interface: ```tsx // VitalsPanel component prototype interface VitalsPanelProps { patientId: string; observations: FHIRObservation[]; onVitalClick: (observation: FHIRObservation) => void; } const VitalsPanel: React.FC = ({ patientId, observations, onVitalClick }) => { // Group by category const vitals = observations.filter((o) => o.resourceType === "vital-signs"); const labs = observations.filter((o) => o.resourceType === "laboratory"); return (

Latest Patient Data

{/* Real-time indicator */}
Live updates
{/* Vital signs grid */}
{vitals.slice(0, 4).map((vital) => ( onVitalClick(vital)} /> ))}
{/* Lab results list */} {labs.length > 0 && (

Recent Labs

    {labs.slice(0, 5).map((lab) => ( ))}
)}
); }; ``` **Voice Context Injection:** ```python # In Thinker service, inject FHIR context into prompt async def build_context_with_fhir( session_id: str, patient_id: str, query: str, ) -> str: # Get latest observations fhir_service = get_fhir_subscription_service() vitals = await fhir_service.get_latest_vitals(patient_id, max_results=5) labs = await fhir_service.get_latest_labs(patient_id, max_results=5) # Build context string context_parts = ["## Current Patient Data"] if vitals: context_parts.append("\n### Vital Signs") for v in vitals: context_parts.append(f"- {v.to_context_string()}") if labs: context_parts.append("\n### Recent Lab Results") for l in labs: context_parts.append(f"- {l.to_context_string()}") return "\n".join(context_parts) ``` ### Speaker Diarization Display Prototype When multiple speakers are detected, the UI will show speaker attribution: ```tsx // SpeakerAttributedTranscript component prototype interface SpeakerAttributedTranscriptProps { segments: SpeakerSegment[]; speakerProfiles: Map; currentSpeaker?: string; } const SpeakerAttributedTranscript: React.FC = ({ segments, speakerProfiles, currentSpeaker, }) => { // Get speaker color const getSpeakerColor = (speakerId: string) => { const colors = ["blue", "green", "purple", "orange"]; const index = parseInt(speakerId.replace("SPEAKER_", "")) || 0; return colors[index % colors.length]; }; return (
{/* Speaker legend */}
{Array.from(speakerProfiles.entries()).map(([id, profile]) => (
{profile.name || id}
))}
{/* Transcript with speaker labels */} {segments.map((segment, index) => (
{/* Speaker indicator */}
{segment.speakerId.replace("SPEAKER_", "")}
{/* Transcript text */}
{formatTime(segment.startMs)} - {formatTime(segment.endMs)}
{segment.transcript}
))}
); }; ``` **Multi-Party Context for Thinker:** ```python # Build multi-speaker context for Thinker def build_multi_speaker_context( diarization_result: DiarizationResult, transcripts: Dict[str, str], # speaker_id -> transcript ) -> str: context_parts = ["## Conversation Participants"] speaker_summary = diarization_result.get_speaker_summary() for speaker_id, speaking_time_ms in speaker_summary.items(): context_parts.append( f"- {speaker_id}: {speaking_time_ms / 1000:.1f}s speaking time" ) context_parts.append("\n## Conversation Transcript") for speaker_id, transcript in transcripts.items(): context_parts.append(f"\n### {speaker_id}:") context_parts.append(transcript) return "\n".join(context_parts) ``` ## PR Breakdown for Phase 3 ### PR #1: UI Integration (Voice-First Input) **Branch:** `feature/voice-mode-v4.1-phase3-ui` **Files:** - `apps/web-app/src/components/voice/VoiceFirstInputBar.tsx` - `apps/web-app/src/components/voice/StreamingTextDisplay.tsx` - `apps/web-app/src/components/voice/LatencyIndicator.tsx` - `apps/web-app/src/components/voice/ThinkingFeedbackPanel.tsx` - `apps/web-app/src/hooks/useStreamingText.ts` - `apps/web-app/src/hooks/useThinkingFeedback.ts` ### PR #2: Advanced Services (FHIR + Diarization) **Branch:** `feature/voice-mode-v4.1-phase3-services` **Files:** - `services/api-gateway/app/services/speaker_diarization_service.py` ✓ - `services/api-gateway/app/services/fhir_subscription_service.py` ✓ - `services/api-gateway/app/api/voice_fhir.py` - `services/api-gateway/app/api/voice_diarization.py` - `apps/web-app/src/components/voice/VitalsPanel.tsx` - `apps/web-app/src/components/voice/SpeakerAttributedTranscript.tsx` ### PR #3: Performance & Quality **Branch:** `feature/voice-mode-v4.1-phase3-performance` **Files:** - `services/api-gateway/app/services/adaptive_quality_service.py` - `services/api-gateway/tests/load/voice_load_test.py` - `docs/voice/performance-tuning-guide.md` ## Related Documentation - [PHI-Aware STT Routing](./phi-aware-stt-routing.md) - [Adaptive VAD Presets](./adaptive-vad-presets.md) - [Unified Conversation Memory](./unified-memory.md) - [Voice Mode v4.1 Overview](./voice-mode-v4-overview.md) 6:["slug","voice/phase3-implementation-plan","c"] 0:["X7oMT3VrOffzp0qvbeOas",[[["",{"children":["docs",{"children":[["slug","voice/phase3-implementation-plan","c"],{"children":["__PAGE__?{\"slug\":[\"voice\",\"phase3-implementation-plan\"]}",{}]}]}]},"$undefined","$undefined",true],["",{"children":["docs",{"children":[["slug","voice/phase3-implementation-plan","c"],{"children":["__PAGE__",{},[["$L1",["$","div",null,{"children":[["$","div",null,{"className":"mb-6 flex items-center justify-between gap-4","children":[["$","div",null,{"children":[["$","p",null,{"className":"text-sm text-gray-500 dark:text-gray-400","children":"Docs / Raw"}],["$","h1",null,{"className":"text-3xl font-bold text-gray-900 dark:text-white","children":"Voice Mode v4.1 Phase 3 Implementation 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