The AsyncLocalStorage guard refused a store's change handler or timer
writing back to its cache without the store waiting for it, which only
queues, and still missed a wait that escapes the async context. The serial
queue and its own-promise chain stay.
The storePushThatAwaitsItsOwnCacheIsRefusedInsteadOfHanging test is
replaced by storeChangeHandlerWritingBackQueuesAfterTheOperation: a store
push emits an event whose handler puts without being awaited; both writes
land in order and store and cache agree.
The contract's Locking section states the rule for all runtimes: a store
call must not wait for a write to its own cache; unawaited write-backs
queue. Python refuses a same-thread re-entrant mutation; no runtime detects
a wait on another thread or async context. The globals row states the
two-step legacy retirement with compensation, and that a crash or double
failure leaving both records is refused at the next pull.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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