tsconfig.base.json

{
  // The compiler options every package in this workspace shares, in one place. Each package's own tsconfig.json extends this and keeps only what genuinely differs for it -- its `lib` and `types` (the isomorphism gate), its own `include`/`exclude`. Its tsconfig.node.json extends that package's tsconfig.json in turn, so it inherits this transitively.
  "compilerOptions": {
    "esModuleInterop": true,
    "forceConsistentCasingInFileNames": true,
    "isolatedModules": true,
    "module": "ESNext",
    "moduleResolution": "bundler",
    "noEmit": true,
    "noFallthroughCasesInSwitch": true,
    "noImplicitReturns": true,
    // Every indexed read is typed as possibly-undefined, so the code narrows properly instead of trusting a bound.
    "noUncheckedIndexedAccess": true,
    "skipLibCheck": true,
    "strict": true,
    "target": "ES2024",
    "verbatimModuleSyntax": true
  }
}