* feat(channels): add voice wake word detection channel
Add VoiceWakeChannel behind the `voice-wake` feature flag that:
- Captures audio from the default microphone via cpal
- Uses energy-based VAD to detect speech activity
- Transcribes speech via the existing transcription API (Whisper)
- Checks for a configurable wake word in the transcription
- On detection, captures the following utterance and dispatches it
as a ChannelMessage
State machine: Listening -> Triggered -> Capturing -> Processing -> Listening
Config keys (under [channels_config.voice_wake]):
- wake_word (default: "hey zeroclaw")
- silence_timeout_ms (default: 2000)
- energy_threshold (default: 0.01)
- max_capture_secs (default: 30)
Includes tests for config parsing, state machine, RMS energy
computation, and WAV encoding.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* fix(config): fix pre-existing test compilation errors in schema.rs
- Remove #[cfg(unix)] gate on `use tempfile::TempDir` import since
TempDir is used unconditionally in bootstrap file tests
- Add explicit type annotations on tokio::fs::* calls to resolve
type inference failures (create_dir_all, write, read_to_string)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* fix(channels): exclude voice-wake from all-features CI check
Add a `ci-all` meta-feature in Cargo.toml that includes every feature
except `voice-wake`, which requires `libasound2-dev` (ALSA) not present
on CI runners. Update the check-all-features CI job to use
`--features ci-all` instead of `--all-features`.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* fix(channels): address critical bugs in voice wake word detection
- Replace std::mem::forget(stream) with dedicated thread that holds the
cpal stream and shuts down cleanly via oneshot channel, preventing
microphone resource leaks on task cancellation
- Add config validation: energy_threshold must be positive+finite,
silence_timeout_ms >= 100ms, max_capture_secs clamped to 300
- Guard WAV encoding against u32 overflow for large audio buffers
- Add hard cap on capture_buf size to prevent unbounded memory growth
- Increase audio channel buffer from 4 to 64 slots to reduce chunk
drops during transcription API calls
- Remove dead WakeState::Processing variant that was never entered
---------
Co-authored-by: Giulio V <vannini.gv@gmail.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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