This one gives Claude deep TypeScript 5.0+ knowledge with all the modern patterns you'd actually want: discriminated unions, branded types, template literals, and strict mode everything. It's opinionated in the right ways, pushing you toward proper type narrowing over any casts and showing you how to set up path aliases and type-safe API clients from scratch. The tooling coverage spans the whole ecosystem from Vite and Vitest to the latest ESLint configs, and it includes real tsconfig examples that don't just enable strict mode but also the extra flags like noUncheckedIndexedAccess. Good for new projects where you want to do TypeScript right from day one, or refactoring existing code to actually use the type system instead of fighting it.
npx skills add https://github.com/personamanagmentlayer/pcl --skill typescript-expert