unify-types

SKILL.md

When types are almost identical, unifying them simplifies your code. The cost of handling small differences is usually less than maintaining parallel type hierarchies.

Files and directories have different operations. Unifying would lose type safety.

| "They're conceptually different" | Code doesn't care about concepts | | "Separate types are cleaner" | More types = more handling code | | "We might need the distinction" | Cross that bridge when you come to it |

Use when similar types have minor differences. Use when union types become complex. Use when choosing between modeling differences. Source: marius-townhouse/effective-typescript-skills.

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