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Found 20 Skills
Complete catalog of 130+ Effect-TS patterns from EffectPatterns repository. Use when looking for specific implementation patterns, best practices, or real-world examples. Complements other skills with concrete, curated patterns.
Effect-TS best practices for services, errors, layers, schemas, and testing. Use when writing/reviewing Effect code, implementing services, handling errors, or composing layers.
Advanced Effect-TS patterns for typed errors, dependency injection, concurrency, resource management, schema validation, and streaming. Use when building Effect programs — not simple Effect.succeed/fail questions, but multi-concern tasks like designing service layers with Layer composition, handling typed error hierarchies with tagged errors, managing concurrent fibers with structured concurrency, scoped resource lifecycles, schema-driven API contracts, or integrating Effect with existing Express/Hono/database stacks. Do not use for basic TypeScript or general functional programming questions.
Effect v4 (beta) development and v3 → v4 migration guidance. Use when building new Effect v4 code or upgrading from v3, including API renames, behavior changes, before/after examples, and v4-specific patterns for services, layers, generators, yieldable, error handling, and schema codecs.
Search external libraries and frameworks using Sourcebot MCP. Use when researching external code patterns, library APIs, framework examples, or documentation from repositories like Effect-TS/effect, vercel/ai, tanstack/query. NEVER use for local project code.
This skill should be used when the user asks to "create a state machine", "add xState", "use xState with React", "implement actor-based state", "manage complex state with state machines", "use xState with Effect", "integrate Effect-ts with xState", mentions xState hooks (useMachine, useActor, useSelector), or discusses finite state machines in React applications.
Create comprehensive technical specs for SDK gaps, feature modules, or system centralization efforts. Use when writing specs, PRDs, gap analysis documents, or planning centralization of scattered functionality into a single module. Triggers on "create spec", "write spec", "gap spec", "centralize", "fill the gap".
Explains basic effect usage and terms. Use when using effect in typescript.