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fix(core): commit state before finalize publishes (#38983)

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Kit Langton 2026-07-27 11:04:04 -04:00 • committed by GitHub
commit 1f2c59a1b6
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2 changed files with 25 additions and 3 deletions
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9
packages/core/src/state.ts
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@ -59,7 +59,11 @@ export interface Options<State, DraftApi> {
readonly initial: () => State
/** Wraps mutable state in a domain-specific draft API. */
readonly draft: MakeDraft<State, DraftApi>
/** Runs after all active transforms and before the rebuilt state becomes visible. */
/**
* Runs after the rebuilt state becomes visible. Update events published here
* act as read barriers: subscribers refetching on the event observe the
* committed state.
*/
readonly finalize?: (draft: DraftApi) => Effect.Effect<void>
}
@ -81,9 +85,8 @@ export function create<State, DraftApi>(options: Options<State, DraftApi>): Inte
const semaphore = Semaphore.makeUnsafe(1)
const commit = Effect.fn("State.commit")(function* (next: State) {
const api = options.draft(next)
if (options.finalize) yield* options.finalize(api)
state = next
if (options.finalize) yield* options.finalize(options.draft(next))
})
const apply = (transform: TransformCallback<DraftApi>, draft: DraftApi) =>