There's a fair bit of discussion about this here: https://github.com/helix-editor/helix/discussions/4037

But the short answer is no. Not yet.

I'm pretty happy just letting the standalone agent write to the file and then reloading it in my editor.

Though I wish the agent CLI tools would use something like inotify to notice when I've made a manual change to a file that they've recently written and then do a better job of incorporating that change as feedback to inform future edits.