How do you access Claude from the multiplexer? AFAIK Anthrophic allows the use with their official tools only.

I have created wrappers for Codex (https://github.com/micw/codex-wrapper-advanced) and claude (https://github.com/micw/claude-wrapper-advanced) that uses their SDK (Codex) and the CLI (Claude) internally to align with the subscription ToS and still have a common API ;-) This way I can use both in any harness and can easily switch between both.