# `Dev.DiagnosticsHandler`
[🔗](https://github.com/mcass19/bb_tui/blob/v0.3.0/dev/diagnostics_handler.ex#L3)

Dev-only command that publishes one of each newly-surfaced diagnostic
message so they appear in the Events panel:

  * a `BB.Safety.HardwareError` on `[:safety, :error]` — the detail behind an
    error badge. This publishes the report directly and does **not** trip
    the safety state machine; production errors arrive via
    `BB.Safety.report_error/3`, which also forces a disarm.
  * an estimator `BB.Message.Estimator.Pose` on `[:estimator, :base_link]`.

Both subtrees are subscribed by `BB.TUI.App` but not modelled in dedicated
state, so they flow through the event log's catch-all. Run this to confirm
the surfacing end to end.

Goal shape: `%{}` (no arguments).

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*Consult [api-reference.md](api-reference.md) for complete listing*