Effect-TS Expert

Expert guidance for functional programming with the Effect library, covering error handling, dependency injection, composability, and testing patterns.

Prerequisites Check

Before starting any Effect-related work, verify the Effect-TS source code exists at ~/.effect.

If missing, stop immediately and inform the user. Clone it before proceeding:

git clone https://github.com/Effect-TS/effect.git ~/.effect

Upstream Baseline

Last checked against ~/.effect HEAD 05d72eab7 from 2026-06-05: