Settlement trimmed the ring to settledRetainBytes before releasing waiters, so a job that finished before its first job_output handed the model only the last 16 KiB plus a dropped-output notice where master's consuming read kept the executor's whole tail. The ring now keeps every byte the model cursor has not consumed on top of the settled cap, and the first terminal model read trims to the cap.
The registered event was emitted after startPump, whose first drain runs synchronously and may announce output, so a source readable at once produced an output event for an id no subscriber had seen registered. The announcement now precedes the pump; the events JSDoc states that a job's first event is registered.
Yichen Jiang
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