{
  // Emit configuration for the published package.
  //
  // The repository authors a growing share of `src/` in TypeScript, but the
  // published package must contain only JavaScript. Node's CommonJS resolver
  // never tries a `.ts` extension, and Node refuses to strip types from any
  // file below `node_modules`. So the `prepack` script writes a `.js` sibling
  // for each `.ts` source, and `postpack` deletes it again.
  //
  // No `outDir` is set, so each `.js` lands next to its `.ts`. That is what
  // makes `require('./mod')` resolve in the tarball.
  //
  // Build mode drives both scripts. `tsc -b` emits, and `tsc -b --clean`
  // removes every generated file. Build mode also writes a state file, which
  // `tsBuildInfoFile` parks below `build/`, because `build/` is already
  // ignored by both git and npm.
  //
  // Type errors are not reported here. `npm run typecheck` owns that job and
  // reads the whole program, including the JavaScript files.
  "extends": "./tsconfig.json",
  "compilerOptions": {
    "noEmit": false,
    "noCheck": true,
    "allowJs": false,
    "module": "commonjs",
    "tsBuildInfoFile": "build/tsconfig.build.tsbuildinfo"
  },
  "include": ["src/**/*.ts"],
  "exclude": ["src/types/**"]
}