tsconfig.app.json

{
  "compilerOptions": {
    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.app.tsbuildinfo",
    "target": "es2023",
    "lib": ["ES2023", "DOM"],
    "module": "esnext",
    "types": ["vite/client", "@testing-library/jest-dom"],
    "allowArbitraryExtensions": true,
    "skipLibCheck": true,

    /* Design system components are copied as plain .jsx + a sibling .d.ts
       (see src/design-system/README.md) - allowJs lets them be imported as-is
       rather than ported to .tsx now; checkJs stays off since they're untyped
       JS, typed only via their .d.ts. */
    "allowJs": true,
    "checkJs": false,

    /* Bundler mode */
    "moduleResolution": "bundler",
    "allowImportingTsExtensions": true,
    "verbatimModuleSyntax": true,
    "moduleDetection": "force",
    "noEmit": true,
    "jsx": "react-jsx",

    /* Linting */
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "erasableSyntaxOnly": true,
    "noFallthroughCasesInSwitch": true
  },
  "include": ["src"],

  /* Tests are checked by tsconfig.test.json instead, which adds node types.
     Keeping them out here is what lets this config's `types` stay free of
     "node" - so application code cannot reach for process/fs and still
     typecheck, while a test that genuinely needs them still can. */
  "exclude": ["src/**/*.test.ts", "src/**/*.test.tsx", "src/test/**"]
}