TypeScript Operations

Comprehensive TypeScript skill covering the type system, generics, and production patterns.

Ecosystem facts verified as of 2026-08-08 (TypeScript 7, Zod 4, Valibot 1).

Staleness check: python scripts/check-typescript-facts.py --offline asserts the catalogued version-bearing facts (TypeScript major, zod, valibot) are still named in the prose and the dated currency note above is present; run --live to confirm each package's npm major still matches the documented major. Catalog: assets/typescript-facts.json.

Type Narrowing Decision Tree