TypeScript

TypeScript runs in strict mode. Extend Expo’s base config so you inherit sane defaults, and turn on strict:

// tsconfig.json
{
  "extends": "expo/tsconfig.base",
  "compilerOptions": {
    "strict": true,
    "paths": {
      "@/*": ["src/*"],
      "@features/*": ["src/features/*"],
      "@shared/*": ["src/shared/*"]
    }
  }
}

Conventions:

• Shared types live in src/shared/types; feature-local types stay in the feature’s types.ts.
• Prefer inferring types from the source of truth — a zod schema (z.infer<typeof schema>), a query hook’s return — over re-declaring shapes by hand.

Type-check everything (this is also a CI step):

npx tsc --noEmit