tsconfig.shared.json

{
  // Shared TypeScript configuration for every package in the workspace.
  //
  // This file holds only what is genuinely repo-wide. Anything a single package
  // decides for itself — module resolution paths, which directories it
  // type-checks — belongs in that package's own tsconfig.json, because `paths`
  // and `include` are resolved relative to the file that declares them, not to
  // the file that extends this one. Putting a `paths` entry here would silently
  // anchor it to the workspace root.
  //
  // A package opts in with `"extends": "../../tsconfig.shared.json"`.
  //
  // Named `shared` rather than the more usual `base` because a machine-global
  // gitignore rule (`*.BASE.*`, matched case-insensitively) silently excludes
  // tsconfig.base.json from the repo, which breaks every clone.
  //
  // Visit https://aka.ms/tsconfig to read more about this file
  "compilerOptions": {
    "noEmit": true,
    "module": "esnext",
    "target": "esnext",
    "types": ["node"],

    // Other Outputs
    "sourceMap": true,
    "declaration": true,
    "declarationMap": true,

    // Stricter Typechecking Options
    "noUncheckedIndexedAccess": true,
    "exactOptionalPropertyTypes": true,

    // Style Options
    "noImplicitReturns": true,
    "noImplicitOverride": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "noFallthroughCasesInSwitch": true,
    "noPropertyAccessFromIndexSignature": true,

    // Recommended Options
    "strict": true,
    "jsx": "react-jsx",
    "verbatimModuleSyntax": true,
    "isolatedModules": true,
    "noUncheckedSideEffectImports": true,
    "moduleDetection": "force",
    "skipLibCheck": true,
    "erasableSyntaxOnly": true,
    "allowJs": true,
    "allowImportingTsExtensions": true
  }
}