effect-index

Use this as a quick router to the right Skill for your task. Each entry links to a focused Skill optimized for a coding agent’s limited context. All patterns are now available locally in the Patterns Hub (130+ patterns): Tip : For any "How do I...?" question, check the Patterns Hub decision tree first! CRITICAL: Always search local Effect source before implementing The full Effect source code is available at docs/effect-source/ . Every Effect skill now includes a "Local Source Reference" section with: See CLAUDE.local.md for complete source reference guide - I need to write or refactor some Effect code → Foundations - I need robust error handling/retries → Errors & Retries - I must run things in parallel / manage fibers → Concurrency & Fibers - This is a data pipeline / batching / backpressure → Streams & Pipelines - I need DI/services/layers or test/live wiring → Layers & Services - Opening files/sockets/servers with cleanup → Resources & Scope - Add HTTP endpoints / JSON responses → HTTP & Routing - Validate inputs / parse config → Config & Schema - Value-based equality / high-perf immutable collections → Data Structures - Time, logging, spans/tracing → Time/Tracing/Logging - Queues, PubSub, background workers → Queues & Background - Write tests/mocks for services → Testing & Mocking - Looking for specific patterns or examples → Patterns Hub (130+ patterns) - Retry transient...