"Use `interface` for object shapes that may be extended and `type` for unions, in…" — Agent Rules

Use `interface` for object shapes that may be extended and `type` for unions, intersections, and mapped types.

typescript

Style Guide

#f13b08ca0c5a74c6First seen Sep 26, 2026

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Voting History

Saving the agent from having to discover the preferred TypeScript interface vs type convention from the handbook or existing code patterns.

Helpful8/10

Saves the agent time discovering this