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Diagnostics that over-claim or are permanently empty #766

Description

@iamfatness

Symptom / cause (read, not run).

  • First-frame evidence: ZoomVideoFrameObserved is set from SourceSnapshot.LiveFrameCount, which the Zoom capture merger sets to the participant count, so joining with one participant "proves" a video frame (FirstFrameValidationEvidenceBuilder.cs:105, 128; ZoomCaptureSnapshotMerger.cs:23-39). ProgramTransport.FrameNumber > 0 is treated as a preview frame observed.
  • Support bundle: render plan always "idle", DeliveredFrameCount always 0, OperatorActions and EventLog always empty (SupportBundleBuilder.cs:205, 212, 312-324); telemetry CaptureSourceCount always 0.
  • The Settings "Feeds" row alternates between "idle, subscribed=0" and "subscribed" because each sync resets SourceSnapshot and each merge restores it.
  • rosterEpoch/rosterRevision are emitted by the core but not bound, so every sync snapshot is rejected by ZoomRosterSnapshotPolicy and RosterStaleSnapshots increments about four times a second. A real stale-roster sequence (join without leaving, then a failed join) looks possible but was not confirmed.

Done when. Video evidence comes from frame events or spine counters; empty bundle sections are filled from core nodes or dropped; roster epoch/revision are bound and the revision-0 case is decided explicitly.

Found by the 2026-10-02 half-wired-feature audit, by reading code on main (8b84a8f). Not yet reproduced in the running app unless stated.

Activity

  1. iamfatness commented on Oct 3, 2026

    @iamfatness
    OwnerAuthor

    Another over-claiming diagnostic, seen on main 88eae0d in the headless media harness: audioMixSession.warnings carried "No native PCM has been mixed for media; meters are held at silence for that channel" while the same snapshot showed mixedFrameCount 324 and the recording carried the media audio at −6.1 dBFS peak. The warning appears to key off a per-channel flag that media PCM does not set.

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