{
  // Type-check only (no emit). Unlike tsconfig.build.json, this does NOT pin
  // `rootDir` to ./src: the training CLI legitimately `typeof import()`s a
  // cross-package helper, and rootDir is an emit-layout constraint that has no
  // bearing on type safety. Widening rootDir to the repo root keeps every
  // referenced file in-bounds so type-checking runs without spurious TS6059.
  "extends": "./tsconfig.build.json",
  "compilerOptions": {
    "noEmit": true,
    "rootDir": "../.."
  }
}