Support [[mumble.extra]] config for additional Mumble identities that
inherit connection settings from the main [mumble] section. Extra bots
get their own state DB and do not run the voice trigger by default.
Add TTS greeting on first connect via mumble.greet config option.
Merlin joins as a second identity with his own client certificate.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
When [voice] trigger is set in config, the bot continuously listens and
transcribes voice. Speech starting with the trigger word is stripped and
echoed back via TTS. Non-triggered speech is silently discarded unless
!listen is also active.
Whisper STT: buffers incoming voice PCM per user, transcribes on
silence gap via local whisper.cpp endpoint, posts results as actions.
Piper TTS: !say fetches WAV from local Piper endpoint and plays via
stream_audio(). 37 tests cover buffering, flush logic, transcription,
WAV encoding, commands, and lifecycle.
