env.example

OPENAI_API_KEY=your_openai_api_key_here
# Optional realtime overrides
# OPENAI_REALTIME_MODEL=gpt-realtime-mini-2025-10-06
# OPENAI_REALTIME_VOICE=verse
# OPENAI_REALTIME_URL=https://api.openai.com/v1/realtime

# Optional voice turn detection (server VAD)
# Adjust these if the coach is interrupting or responding too slowly.
# OPENAI_TURN_DETECTION=server_vad   # server_vad (default) or none
# OPENAI_TURN_THRESHOLD=0.55         # higher = less sensitive to quiet speech (default 0.55)
# OPENAI_TURN_PREFIX_MS=400          # padding before speech (ms). Raise to avoid clipping the start.
# OPENAI_TURN_SILENCE_MS=1200        # silence to decide you're done (ms). Raise to make the coach wait longer.

# Optional: server-side input audio transcription for realtime WebRTC
# Default model used when unset: gpt-4o-mini-transcribe
# Example (explicit model):
# OPENAI_INPUT_TRANSCRIPTION_MODEL=gpt-4o-mini-transcribe
# Example (disable server-side transcription):
# OPENAI_INPUT_TRANSCRIPTION_MODEL=