[dezren39]

Fixes #2902 (queue task 4131).

QueueClient.ensureWorker() memoised its registration promise with ??= — including when it rejected. One transient registration failure (PostgREST 5xx, network blip) wedged every later launch for the life of the process, and launchSession had already created a real session before the throw.

Change (pm-stack/dispatch/src/queue.ts): the memoised promise gets a .catch that resets workerEnsured to null before rethrowing — the reset runs before the rejection reaches any awaiting caller, and no newer attempt can have replaced the memo in between (a new attempt is only assigned while the memo is null, and this catch is the only place that nulls it). A successful registration stays cached. Worker row contents and the ignore-duplicates upsert are unchanged.

Tests (new pm-stack/dispatch/test/queue.test.ts):

• first attempt fails (HTTP 503), second succeeds, later calls reuse the success without re-fetching
• a fetch throw also resets the memo
• concurrent callers share one attempt and one retry

Verified on the laptop: bun test — 42 pass / 0 fail across the dispatch suite. (bunx tsc --noEmit cannot run in this environment — @types/bun is not installed; it fails identically on clean main.)

---

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[chatgpt-codex-connector]

Codex Review Summary

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-31T01:48:58.088215Z	5c920e6	PR opened

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