typescript

When to Use

Triggers: When writing TypeScript, defining types/interfaces, or using utility types.

Load when: writing TypeScript code, defining data structures, working with generics, or needing type safety patterns.

Critical Patterns

Pattern 1: Const Types (single source of truth)

// ✅ Create const object first, then extract type
const USER_ROLES = {
  ADMIN: 'admin',
  USER: 'user',
  GUEST: 'guest',
} as const;