QA: Voice Input — PydanticAI

Prerequisites

• Demo deployed and accessible at /demos/voice
• Agent backend healthy (check /api/health)
• OPENAI_API_KEY set (required for Whisper transcription)
• Bundled public/demo-audio/sample.wav present

Test Steps

1. Basic Functionality

• Navigate to /demos/voice
• Verify the header "Voice input" is visible
• Verify the sample-audio row is visible with caption Sample: "What is the weather in Tokyo?"
• Verify the "Play sample" button is enabled
• Verify <CopilotChat /> renders a message composer
• Verify the mic button (data-testid="copilot-start-transcribe-button") is visible — the authoritative signal that transcriptionService is mounted on /api/copilotkit-voice

2. Sample-audio path

• Click "Play sample"
• Within 2 seconds, the button text flips to "Transcribing…"
• Within 15 seconds, the chat textarea contains text matching "weather" or "Tokyo" (case-insensitive)
• Click send — within 30 seconds an assistant response renders

3. Mic path (manual)

• Click the mic button and grant permission
• Speak "Hello" and click the stop button
• Within 5 seconds, the textarea contains "hello" (case-insensitive)
• Click send — assistant responds

4. Auth-error path

• Unset OPENAI_API_KEY on the deployment and click "Play sample"
• Verify a 401 error surfaces (not an opaque 503) — the GuardedOpenAITranscriptionService maps missing-key to a typed 401 via the runtime's error categorizer.

Known Limitations vs. langgraph-python port

• None — the transcription-service wiring is framework-agnostic.

Expected Results

• Mic affordance is visible on the PydanticAI voice route.
• Sample-audio round-trip completes within 15s.
• Missing-key deployments fail loudly with a clean 4xx, not a silent 5xx.