IOSubsystems (perf/io-trace.ts)

Defines constants for voice and chat pipeline tracing, including subsystem names and attributes.

// Source: https://github.com/moeru-ai/airi | License: MIT | Copyright 2024-PRESENT Neko Ayaka
// Provided via justclaw.it.com; keep this notice with the code.
export const IOSubsystems = {
  VoiceInput: 'voice-input',
  KWS: 'kws',
  VAD: 'vad',
  ASR: 'asr',
  EndJudge: 'end-judge',
  Rephrase: 'rephrase',
  LLM: 'llm',
  StreamingControl: 'streaming-control',
  TTS: 'tts',
  Playback: 'playback',
} as const
export type IOSubsystem = (typeof IOSubsystems)[keyof typeof IOSubsystems]

/**
 * Span names of the voice and chat pipeline.
 *
 * A spoken turn is one trace: `Wake word` (when a wake started the input) or `Voice input` is the root.
 * `Voice input` holds VAD segments, speech recognition, end judgements, and the rephrase.
 * The `Interaction turn` that the input submits is its child

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