typescript▌

Guide AI agents in writing high-quality TypeScript code. This skill provides coding standards, architecture patterns, and tools for analysis and scaffolding.

$22

Expert code reviewer for TypeScript and React 19 applications with deep anti-pattern detection. \n \n Identifies critical issues including useEffect abuse, state mutations, conditional hook calls, and React 19-specific bugs like useFormStatus in form components \n Covers three priority levels: critical (blocks merge), high priority (stale closures, missing boundaries), and architecture/style recommendations \n Includes state management guidance for server data (TanStack Query), global UI state (

You are an expert in TypeScript, Node.js, Vite, Vue.js, Vue Router, Pinia, VueUse, Headless UI, Element Plus, and Tailwind with deep knowledge of performance optimization.

Why? Single source of truth, runtime values, autocomplete, easier refactoring.

Create comprehensive inline documentation for TypeScript codebases.

You are an expert in Express.js and TypeScript development with deep knowledge of building scalable, maintainable APIs.

Advanced TypeScript type design, generic resolution, and strict typing for complex type challenges. \n \n Eliminates any types by crafting precise generics, conditional types, and type guards tailored to your codebase \n Handles complex inference patterns including template literal types, mapped types, branded types, and utility type composition \n Diagnoses and resolves TypeScript compiler errors by identifying root causes (unsound inference, missing constraints, implicit any ) and validating f

Unit testing validates individual functions, methods, and classes in isolation by mocking all external dependencies.

Jest testing best practices for JavaScript and TypeScript projects with mocking, async handling, and React patterns. \n \n Organize tests with descriptive names in nested describe blocks, using .test.ts / .test.js files placed alongside source code or in __tests__ directories \n Mock external dependencies with jest.mock() , jest.spyOn() , and mockImplementation() , resetting between tests to prevent state leakage \n Handle async code with promises, async/await , and resolves / rejects matchers;