{
  "feature_columns": [
    "vad_prob",
    "speech_ms",
    "silence_ms",
    "energy",
    "stt_confidence",
    "stable_chars",
    "partial_chars",
    "stable_word_count",
    "words_since_pause",
    "tts_playback_ms",
    "tts_echo_risk",
    "time_since_user_started_ms",
    "time_since_assistant_started_ms",
    "recent_endpoint_candidate",
    "vad_active",
    "ends_with_punctuation",
    "ends_with_continuation",
    "required_slots_filled",
    "assistant_speaking",
    "backchannel_like",
    "expected_answer_type"
  ],
  "numeric_features": [
    "vad_prob",
    "speech_ms",
    "silence_ms",
    "energy",
    "stt_confidence",
    "stable_chars",
    "partial_chars",
    "stable_word_count",
    "words_since_pause",
    "tts_playback_ms",
    "tts_echo_risk",
    "time_since_user_started_ms",
    "time_since_assistant_started_ms",
    "recent_endpoint_candidate",
    "vad_active",
    "ends_with_punctuation",
    "ends_with_continuation",
    "required_slots_filled",
    "assistant_speaking",
    "backchannel_like"
  ],
  "categorical_features": [
    "expected_answer_type"
  ],
  "default_features": {
    "vad_prob": 0.0,
    "speech_ms": 0.0,
    "silence_ms": 0.0,
    "energy": 0.0,
    "stt_confidence": 0.0,
    "stable_chars": 0.0,
    "partial_chars": 0.0,
    "stable_word_count": 0.0,
    "words_since_pause": 0.0,
    "tts_playback_ms": 0.0,
    "tts_echo_risk": 0.0,
    "time_since_user_started_ms": 0.0,
    "time_since_assistant_started_ms": 0.0,
    "recent_endpoint_candidate": 0,
    "vad_active": 0,
    "ends_with_punctuation": 0,
    "ends_with_continuation": 0,
    "required_slots_filled": 0,
    "assistant_speaking": 0,
    "backchannel_like": 0,
    "expected_answer_type": "open_ended"
  },
  "event_labels": [
    "listening",
    "speech_started",
    "endpoint_candidate",
    "turn_committed",
    "user_resumed",
    "interruption_started",
    "interruption_confirmed",
    "backchannel_detected",
    "false_alarm"
  ]
}