Software EngineeringOpen accessPublished 2 Oct 2026
TypeScript discipline for any JavaScript/TypeScript project (frontend + backend): strict mode, type design, generics, narrowing, error types, module resolution, tsconfig hygiene. Apply when the project has `tsconfig.json` and `typescript` in devDependencies. Stack-agnostic — referenced by every JS/TS framework plugin in the marketplace.
Use this skill to:
- Write types that catch bugs at compile time, not runtime.
- Use generics, conditional types, and discriminated unions correctly.
- Avoid `any`, `unknown`, and unsafe casts.
- Match the project's tsconfig strictness level.
- Type third-party libraries (with @types/* or declaration files).
Do NOT use this skill for:
- …
