Mjolnir

One control plane for all your coding agents.

Mjolnir (mj) runs Claude Code, Codex, Kimi Code, Grok Build, Muse Code, OpenCode, MiMo Code, and DSH sessions side by side, on your laptop, in containers, over SSH, or on EC2, and keeps them running after you close the terminal. You can move a session to another account, another harness, or a compatible target without starting over. Bare SSH sessions stay on their original host.

By default Mjolnir sends recent prompt and reply text and help-search text to TypeSafe's hosted Jev classifier through a public proxy. When a sub-agent uses adaptive effort, it also sends the clipped task name and instructions plus the child model ID. [jev] enabled = false in config.toml stops all Jev requests (details).

Documentation · Quickstart · Releases

Why Mjolnir

If you use one agent, in one terminal, on one machine, you don't need Mjolnir. It's for the point where that stops scaling: several subscriptions, several repositories, several machines, and work that should keep going when you walk away.

• Sessions that outlive your terminal. Each session runs beside a worker that owns its prompt queue and event journal. Detach, close the terminal, or restart the daemon; the agent keeps working and you reattach where you left off.
• Run anywhere. Use a local checkout or isolated clone, a Docker, Podman, or Apple container, any Linux host over SSH, or an EC2 instance provisioned from a launch template. Remote hosts need no resident daemon; Mjolnir uploads a worker on demand.
• Move work freely. Switch a session from your personal Codex account to your work account, from Codex to Claude Code, or from your workstation to EC2. Checkpoints are verified before anything is torn down.
• See every account's quota. Keep multiple named profiles per harness and watch remaining subscription quota and target capacity in one view.
• Shared project memory. Supported harnesses share synchronized project memory across sessions and targets. Muse currently cannot receive the injected memory tools; see the harness limitations.
• Adversarial review. Turn it on and an independent reviewer, on a different provider when one is available, checks each turn's work and reports actionable findings.
• Multi-repo projects. Bundle several repositories so they provision, checkpoint, move, and restore together.
• Agent and editor integration. Drive sessions through mj new, mj prompt, mj message and mj wait, the HTTP API, or mj acp for stdio ACP clients.
• Terminal, web, and desktop. A full terminal dashboard, plus a privacy-first web viewer you can reach from your phone over Tailscale, and a desktop app. All three share the same live sessions.

Install

On Linux or macOS (use WSL2 on Windows):

curl -fsSL https://raw.githubusercontent.com/BrokkAi/mjolnir/master/install.sh | bash

Or with npm:

npm install -g @brokkai/mjolnir

Linux releases need glibc 2.28 or newer on x86-64 or ARM64. See the installation guide for Cargo, source builds, and desktop dependencies.

Quick start

Mjolnir can install a pinned coding harness when you sign in. On first launch, choose Set up a managed agent if no agent is found, or install and sign in to an agent you already have and choose Detect profiles. Managed setup creates the profile and opens sign-in without asking you to choose a home directory. Then, from a project directory:

mj

On first launch, Mjolnir automatically adds profiles for your installed agents, and a bundle for the current GitHub repository; every later plain mj launch adds profiles for agents installed since (mj go, mj workspaces, and the relaunch after an upgrade do not). To stop using an agent, disable its profile in Settings rather than removing it. A brief welcome shows what it found and any prerequisite errors. Press Continue, then ctrl+b c to create a session: pick an agent profile and where the session runs. Container images download in the background while you use the dashboard. Configure SSH and AWS targets in Settings (ctrl+b s).

• mj setup reruns agent and repository discovery from the shell, preserving your existing configuration.
• mj go is a shortcut for later. Each folder remembers its setup, and running mj go again returns you to that folder's last conversation.
• mj simple is the minimal tmux-friendly mode. It uses the default enabled agent, always starts locally with an isolated checkout, disables automatic review for that session, and uses direct Ctrl-key commands with no prefix, so Ctrl+B stays available to tmux.
• mj doctor checks prerequisites and tells you how to fix anything missing.

The quickstart walks through a first session end to end.

Documentation

• What is Mjolnir?: architecture, goals, and supported harnesses and runtimes.
• Profiles and harnesses: accounts, login, credentials, and skills.
• Targets and bundles: local, container, SSH, and EC2 environments, multi-repository projects, and shared memory.
• Sessions and durability: adoption, move, resume, checkpoints, and recovery.
• Terminal and web and desktop: controls and remote access.
• Turn review, configuration, CLI reference, and security.
• HTTP API and ACP agent: automate managed sessions.

The documentation site source lives in docs/. Looking for the previous generation? See Mjolnir 1.x.

About

Mjolnir is free and open source, built by the engineers at Brokk because we wanted to use it. It is licensed under GPL-3.0-only.