angular/tools/manual_api_docs/tsconfig.json

{
  "extends": "../tsconfig.json",
  "compilerOptions": {
    // Note: We use `bundler` here because compiler-cli is understood as ESM, but
    // there are no explicit extensions. This is invalid. For our type-only usage this
    // is fine.
    "module": "ESNext",
    "moduleResolution": "bundler",
    "paths": {
      "@angular/compiler-cli/*": ["../../packages/compiler-cli/*"]
    }
  }
}