interop

Files under @repobuddy/typescript/tsconfig/interop/ match the Interop Constraints category of the TSConfig reference.

File	Sets
`interop/buddy`	`forceConsistentCasingInFileNames`, `isolatedModules`
`interop/esm`	`esModuleInterop`

`interop/buddy`

The recommended interop settings. Used by tsconfig/monorepo.

{
  "compilerOptions": {
    "forceConsistentCasingInFileNames": true,
    "isolatedModules": true
  }
}

forceConsistentCasingInFileNames rejects an import whose casing differs from the file name on disk.
isolatedModules reports code that a single-file transpiler (esbuild, SWC, Babel) cannot compile.
tsc --showConfig (TypeScript 7.0.2) also lists preserveConstEnums: true, which TypeScript derives from isolatedModules.

{
  "compilerOptions": {
    "esModuleInterop": true
  }
}

Use it with module set to an ES* value or CommonJS. Do not use it with Node16 or NodeNext (the file’s own comment says so).

modules/buddy-commonjs already sets esModuleInterop, so you do not need this file with it.