Model Backends
- Qwen2.5-VL-7B-Instruct: real frame-conditioned invocations. Only direct or safely repaired structured JSON that passes field validation is accepted.
- CLAP: real audio-tagging scores retained for ProactiveAVInteraction.
- WhisperX small: real segment transcription. Empty no-speech results are explicitly marked
asr_status=no_speech; timestamps are segment-level. - OCRScreenGrounding: deterministic generator ground truth, not OCR-model inference.
- Piper
en_US-lessac-medium: deterministic materialization for the internal speech package. Generated speech is documented as synthetic.