ts-config
Installation
SKILL.md
It also covers the TS 6.0 deprecation cleanup ahead of 7.0: dropping moduleResolution node/node10, setting verbatimModuleSyntax, strict + noUncheckedIndexedAccess, explicit types, and explicit rootDir now that 6.0 no longer infers it.
Out of scope: TypeScript language syntax and idioms belong to ts-language-patterns; framework configs that ship their own tsconfig base (Next.js/Astro/Vite plugin skills) and non-TS build tooling are not covered.