personaplex_capabilities(
*, max_sessions: int = 1
) -> DuplexCapabilities
What a PersonaPlex session advertises in session.created.
PersonaPlex is a pure-lockstep model: audio flows both ways at the codec frame rate, the model itself decides when to speak, and there are no client commits or external turn signals. Barge-in is native model behaviour but destructive output interruption and model-state rewind are not validated, so it is not advertised. No text seeding exists, so the model cannot serve /v1/chat/completions.