Attach action to index() route ?

[ItsTarik]

I have a config that looks like this:

export default [
  index("routes/home.tsx"),
  route("details/:id", "routes/details.tsx"),
] satisfies RouteConfig;

i have a root.tsx where app and layout are defined, and routes/home.tsx where the home component lives with its loaders, my question is how to attach action to the index("routes/home.tsx") ? placing the action in the same file with the loader doesn't work, i was able to make it working by placing the action in the root.tsx file which isn't convenient !