docs: add note about multiple configs files to README

README.md

@@ -761,6 +761,8 @@ export default {
 }
 ```
 
+To support backwards-compatibility, monorepo features require multiple _lint-staged_ configuration files present in the git repo. If you still want to run _lint-staged_ in only one of the packages in a monorepo, you can either add an "empty" _lint-staged_ configuration to the root of the repo (so that there's two configs in total), or alternatively run _lint-staged_ with the `--cwd` option pointing to your package directory (for example, `lint-staged --cwd packages/frontend`).
+
 </details>
 
 ### Can I lint files outside of the current project folder?