noise-reduction-integration

name	noise-reduction-integration
description	Add or modify microphone noise-reduction providers in assistant-api with denoiser factory wiring, packet safety, and option/UI compatibility.

Noise Reduction Integration Skill

Mission

Integrate denoisers that reduce background noise while preserving speech intelligibility, timing stability, and packet ordering.

Inputs expected from user

1. Provider/runtime type: native library, SDK, or cloud API.
2. Input audio assumptions: sample rate, channels, encoding.
3. Target tradeoff: stronger suppression vs speech naturalness.

If missing:

• Assume mono LINEAR16 internal audio path.
• Preserve existing frame/chunk cadence and low-latency defaults.

Hard boundaries

In scope:

• api/assistant-api/internal/denoiser/internal/<provider>/...
• api/assistant-api/internal/denoiser/denoiser.go
• api/assistant-api/internal/type/packet.go only if packet compatibility requires it
• provider option wiring for microphone.denoising.provider in API/UI config paths

Out of scope:

• STT/TTS model internals
• EOS/VAD algorithms
• telephony transport adapters unless required by codec compatibility

Packet contract

Input:

• DenoiseAudioPacket

Required behavior:

• emit denoised audio without changing packet ordering
• preserve timestamps/chunk cadence expected by downstream STT/VAD/EOS
• avoid generating duplicate or empty audio packets

Optional diagnostics:

• conversation/debug events with denoiser provider and processing stats

Implementation workflow

1. Pick nearest baseline (rn_noise, krisp).
2. Implement provider package under internal/<provider>/.
3. Register provider in denoiser factory switch.
4. Handle init/close lifecycle and fallback behavior safely.
5. Wire provider option/config in API and UI provider config where needed.
6. Add provider tests for default selection, invalid provider fallback, and chunk integrity.

Governed lifecycle

• Classify work as Fast, Standard, or Governed using DEVELOPMENT_PROCESS.md; use the full gated lifecycle only for Governed work.
• This skill operates only in its assigned phase and path ownership; it may not approve its own plan or code review.
• Governed implementation starts only from a coordinator-attested approved plan; Fast and Standard work follows its lighter documented lifecycle.
• Return changed-file and verification evidence to the coordinator, then route the complete verified diff to the read-only code-reviewer.

Validation commands

• go test ./api/assistant-api/internal/denoiser/...
• go test -run TestGetDenoiser ./api/assistant-api/internal/denoiser/...
• cd ui && yarn test providers
• ./skills/noise-reduction-integration/scripts/validate.sh --check-diff --provider <provider>

References

• references/checklist.md
• references/noise-reduction-checklist.md
• examples/sample.md