Skill Claude CodeCodex
Type-safe SQL with Effect — SqlClient tagged-template queries, SqlSchema, SqlModel CRUD repositories, SqlResolver batching, and Migrator. Use when working with databases, writing queries, defining models, or setting up migrations.
Skill Claude CodeCodex
Build effectful pull-based streaming pipelines with Effect Stream — creation, transformation, consumption, NDJSON/Msgpack encoding, concurrency, resource safety. Use when working with values produced over time, paginated APIs, event listeners, or streaming I/O.
Skill Claude CodeCodex
Write comprehensive tests using @effect/vitest for Effect code and vitest for pure functions. Use this skill when implementing tests for Effect-based applications, including services, layers, time-dependent effects, error handling, and property-based testing.
Skill Claude CodeCodex
Implement typeclasses with curried signatures and dual APIs for both data-first and data-last usage.
Skill Claude CodeCodex
Conceptual guide to wide events (canonical log lines) for observability. Use when thinking about instrumentation strategy, span annotations, or designing what context to capture.
Skill Claude CodeCodex
Build durable workflows with Effect using Workflow, Activity, DurableClock, DurableDeferred, and DurableQueue for execution that survives restarts, supports compensation (saga pattern), and integrates with Effect Cluster for distribution.
Instructions file CodexOpenCode
Instructions for mpsuesser/effect-claudecode, covering agents.md — effect-claudecode, build / lint / test commands, running a single test, verification before submitting and project structure.