coding-standards

Apply consistent naming conventions, immutability with spread operators, proper type definitions instead of any, and comprehensive error handling. Use this Skill during code reviews and refactoring to check code against these rules systematically.

Use functional components with typed props interfaces, extract reusable logic into custom hooks, and update state with functional updates like setCount(prev => prev + 1). Prefer clear conditional rendering with && over nested ternaries.

Use Zod schema validation to parse and validate incoming request bodies before processing. Return a consistent error response with status 400 and validation details when parsing fails, keeping API responses in a uniform success/data/error structure.

Use Promise.all when async operations are independent of each other, such as fetching users, markets, and stats simultaneously. Sequential awaits are only needed when one call depends on another's result.

Watch for functions longer than 50 lines, nesting deeper than a few levels, and unexplained magic numbers. Fix these by splitting logic into smaller functions, using early returns, and replacing literals with named constants.