I built Proxima, an open-source MCP server that runs locally and lets you orchestrate multiple AI providers in one workflow. I used it to run a multi-model “dev team” experiment (planning → coding → review → fixes). Looking for feedback on architecture, MCP tool design, and reliability/observability.

If you want, I can tailor the title to be more HN-friendly based on whether you’re submitting as link post (GitHub) or text post (write-up).