Effect Pattern Matching Skill

Use this skill when working with discriminated unions, ADTs, conditional logic, or any type that uses _tag discrimination. Pattern matching provides exhaustive, type-safe alternatives to imperative conditionals.

Effect Source Reference

The Effect v4 source is available at ~/.local/share/effect-solutions/effect/. Browse and read files there directly to look up APIs, types, and implementations.

Reference this for:

• Match source: packages/effect/src/Match.ts
• Data source: packages/effect/src/Data.ts
• Full Schema API: packages/effect/SCHEMA.md
• Effect source: packages/effect/src/

Core Philosophy

Pattern matching over imperative conditionals: