Typescript

Enforces strict TypeScript configuration with comprehensive tooling for type safety and code quality. Automatically activates on .ts, .tsx, and tsconfig files. Sets up a complete development environment with ESLint strict rules (max 20 lines per function, 2 levels of nesting), Jest testing patterns, and pre-commit hooks that run type checking and tests on changed files. The opinionated structure separates pure business logic from side effects, and the type patterns section is genuinely useful, especially the discriminated unions for error handling and branded types for preventing ID mixups. Pushes hard against any, type assertions, and enums, which will feel restrictive if you're used to looser TypeScript but produces more maintainable code.