New ACP client: RunJam — local-first desktop for Claude Code, Codex CLI & Gemini CLI By using ACP

[peintune]

Apologies upfront for the shameless self-promotion — I thought this community might be interested though.

I've been building RunJam, a free, open-source (MIT) desktop app that manages your coding agents from a single window. It's built on ACP top to bottom, which means you get to use Claude Code, Codex CLI and Gemini CLI side by side in one interface — with zero ACP rewrites, no per-agent config, and seamless session handoff between agents. It even auto-detects the agents already installed on your machine.

A few things I think this community will care about:

A session board instead of terminal chaos. Every running session becomes a card in one of four columns — idle, running, waiting for input, errored — so you can see what all your agents are doing at a glance. Drag to reorganize, click any card to jump straight back into that session, with full context. Sessions persist locally across restarts, so no more losing work when you close a window.

Cross-protocol model proxy. A built-in proxy translates between Anthropic, OpenAI and Gemini protocols in real time. Run GPT-4o inside Claude Code, Claude inside Codex, DeepSeek or Qwen inside Gemini CLI — model and tool are fully decoupled. A central model hub lets you configure each agent's model once, with aliases like fast / smart.

Local models, one click. Built-in llama.cpp management: download GGUF models (DeepSeek Coder, Qwen, Llama, Mistral) and run them locally, automatically wired through the same proxy — any agent, any model, zero API cost, fully offline.
Cost transparency. A per-session dashboard shows token usage, cost by model/agent/day, trend charts and cache hit rates. You actually see where your money goes.
Everything is local-first: data lives in ~/.runjam, API keys are stored in the system keychain, and nothing leaves your machine.

It's a bit of a passion project, and it's my personal daily driver for coding — would love to hear people's feedback.

Links: Website — https://runjam.app · Source & downloads — https://github.com/peintune/runjam · Platforms — macOS, Windows, Linux

[peintune]

We'd also love to see RunJam added to the official clients list on https://agentclientprotocol.com/get-started/clients.