pattern matching

SKILL.md

Pattern matching replaces ALL imperative control flow in Effect code. There should be ZERO if/else statements, switch/case blocks, or ternary operators in idiomatic Effect code.

| if/else chains | Match.value + Match.when | | switch/case statements | Match.type + Match.tag | | Ternary operators (? :) | Match.value + Match.when | | Null checks | Option.match | | Error checks | Either.match or Effect.match | | Type guards | Match.when with Schema.is() |

When you encounter imperative control flow, refactor it to pattern matching immediately.

This skill should be used when the user asks about "Effect Match", "pattern matching", "Match.type", "Match.tag", "Match.when", "Schema.is()", "Schema.is with Match", "exhaustive matching", "discriminated unions", "Match.value", "converting switch to Match", "converting if/else to Match", "TaggedClass with Match", or needs to understand how Effect provides type-safe exhaustive pattern matching. Source: andrueandersoncs/claude-skill-effect-ts.

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