effect-concurrency-testing
Effect Concurrency Testing Skill
This skill provides patterns for testing Effect's concurrency primitives: fibers, latches, deferreds, PubSub, SubscriptionRef, and streams.
Core Principles
CRITICAL: Choose the correct coordination primitive based on what you need to synchronize.
| Need | Use |
|---|---|
| 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 |
| Verify events published | PubSub.subscribe + PubSub.takeAll |
| Check fiber status | fiber.unsafePoll() |
Fiber Coordination Patterns
More from front-depiction/claude-setup
command-executor
Execute system commands and manage processes using Effect's Command module from @effect/platform. Use this skill when spawning child processes, running shell commands, capturing command output, or managing long-running processes with cleanup.
13spec-driven-development
Implement the complete spec-driven development workflow from instructions through requirements, design, and implementation planning. Use this skill when starting new features or major refactorings that benefit from structured planning before coding.
10react-composition
Build composable React components using Effect Atom for state management. Use this skill when implementing React UIs that avoid boolean props, embrace component composition, and integrate with Effect's reactive state system.
10domain-modeling
Create production-ready Effect domain models using Schema.TaggedStruct for ADTs, Schema.Data for automatic equality, with comprehensive predicates, orders, guards, and match functions. Use when modeling domain entities, value objects, or any discriminated union types.
10effect-ai-streaming
Master Effect AI streaming response patterns including start/delta/end protocol, accumulation strategies, resource-safe consumption, and history management with SubscriptionRef.
9writing-laws
Write formal laws and covenants for codebases using proper legal-style structure. Use when establishing inviolable standards, architectural constraints, or domain-specific rules that must be followed without exception.
9