Content-free observations in Parlora.status/1 under :health.

Input/output counters count successful pipeline writes to the provider/channel adapter, including silence. They do not prove network receipt, speech, audibility, or an answer. Counters are approximate concurrent samples, not atomic bundles. Event counts cover observations delivered to the coordinator, not all wire events. Timestamps are signed VM-local monotonic microseconds; absent activity has nil time.

Parlora.expect_progress/4 arms a single deadline (1–300,000 milliseconds). until: selects :assistant_caption (default), :user_caption, :delegation, :conversation (any of these three), or :explicit. Automatic resolution requires a new, nonblank matching caption or a delegation observed after arming and processed before the deadline. It establishes activity only, not correctness or correlation with a particular turn. Use :explicit and Parlora.resolve_progress/3 when the host needs semantic or request-specific completion. Acknowledgments and audio alone never satisfy it.

on_timeout: :notify (default) emits a session :progress_changed event with status: :timed_out and leaves the session ready. :close also emits :failed with cause: :progress_timeout and starts bounded cancellation/cleanup. External work can remain uncertain. No reconnect or work replay occurs automatically.

No deadline runs by default. The host arms it before the operation it expects, cancels it on interruption or a changed expectation, and chooses a suitable budget. Silence, muted input and long backend work are not independently classified as faults. Closing cancels a pending expectation. Ordinary activity never extends its deadline.

One current/latest expectation is retained. Repeated IDs with identical settings are idempotent, including after resolution; conflicting reuse is rejected. Records are bounded by max_records; exhaustion rejects further expectations. IDs appear in status/events, so use opaque IDs rather than user content.