I've developed something similar for personal use. A harness who's only job is to delegate to other harnesses (i.e: AntiGravity, Codex, Claude Code, Hermes) to create an opencode-web-like interface across multiple hosts.

For Claude Code, don't use remote-connections. Your best option is to look at how the closed-source VSCode plugin interfaces with Claude Code. The way it works is that it reads files directly. This API, although unofficial, is likely very stable, because an old VSCode extension still has to interact with new version of Claude Code.

If there's any interest in this sort of thing, maybe I'll open-source it. I would have to cleanup the slop though.