effect-concurrency-testing

SKILL.md

This skill provides patterns for testing Effect's concurrency primitives: fibers, latches, deferreds, PubSub, SubscriptionRef, and streams.

CRITICAL: Choose the correct coordination primitive based on what you need to synchronize.

| Simple fiber yield | Effect.yieldNow | | Forked PubSub subscriber ready | yieldNow after fork, yieldNow after each publish | | Wait for subscriber ready | Deferred.make() + Deferred.await | | Wait for stream element | Effect.makeLatch() + Stream.tap(() => latch.open) | | Time-dependent behavior | TestClock.adjust |

測試效果並發原語包括 PubSub、Deferred、Latch、Fiber 協調、SubscriptionRef 和 Stream。在測試並發效果、事件驅動系統或光纖協調時使用此技能。 來源：front-depiction/claude-setup。

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