TypeScript Rules

Use TypeScript generics effectively — constrain type parameters, avoid over-generic functions, use utility types, and apply the principle of least generic typing for maximum clarity.

Never use 'any' in TypeScript code — use unknown for truly unknown types, generics for flexible functions, union types for multiple options, and proper type narrowing instead.

Every TypeScript project must enable strict mode and all additional strict checks — noUncheckedIndexedAccess, exactOptionalPropertyTypes, and noImplicitOverride for maximum type safety.

Use TypeScript type guards effectively — typeof, instanceof, in operator, discriminated unions, and custom type predicates for safe runtime type checking with compile-time guarantees.