Effect Skill 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.

Decision Tree

• 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)