Download MT Code • Read the Documentation • Report Issues
MT Code is a free, open-source desktop app for running and controlling coding agents — Claude Code, Codex, Cursor, Grok Build, OpenCode, and Google Antigravity — from one place. It is Munim Technologies' fork of T3 Code with extra features and fixes, and anyone can download and use it.
munimtech.com/mt-code — or grab installers straight from GitHub Releases:
- macOS (Apple Silicon):
MT-Code-<version>-arm64.dmg - Windows (x64):
MT-Code-<version>-x64.exe
macOS builds are signed with a Developer ID but not yet notarized; Windows builds are unsigned:
- macOS: if Gatekeeper warns, right-click the app → Open (first launch only).
- Windows: if SmartScreen warns, choose More info → Run anyway.
The app auto-updates from this repository, so you get new MT Code features and fixes as they ship.
MT Code has no hosted web app of its own. Run the desktop app (or npx t3@latest) on your machine and reach it from another device over T3 Connect or your own HTTPS tunnel (Tailscale Serve works well); see remote access.
MT Code drives agents you already have. Install and sign in to at least one provider CLI:
- Claude: install Claude Code and run
claude - Codex: install Codex CLI and run
codex login - Cursor: install Cursor CLI and run
agent login - Grok Build: install Grok Build CLI and run
grok login - OpenCode: install OpenCode and run
opencode auth login - Antigravity: enable it in Settings, then use Install Antigravity and Sign in with Google. No CLI is required.
Your existing subscriptions are used directly — MT Code sells nothing and adds no accounts of its own.
Same cost model as T3 Code: the app and its server run on your computer, and model tokens come from Claude / Codex / Cursor / Grok / OpenCode. Munim hosts nothing on your behalf — pairing and Computer Use reach your machine directly. There is no Munim-hosted web app, no model proxy, no Workers AI classifier, and no PlanetScale relay unless you explicitly opt into that paid stack.
Compared to T3 Code. MT Code started as a fork. Upstream is merged only when you ask an agent to do it — nothing pulls pingdotgg/t3code automatically. Some rows started as unmerged upstream PRs that MT Code ships today; others were built here.
This table lists only the differences. Once T3 Code ships a feature MT Code had first, MT Code adopts T3 Code's implementation and the row leaves the table — drag-to-reorder, PDF attachments, cookie import, tool-activity grouping, composer drawers, preview viewport, file-chip reveal, macOS editor discovery and pull request stacks all went that way. Nothing T3 Code ships is missing here.
| Feature | MT Code | T3 Code |
|---|---|---|
| Computer Use — agents click, type, screenshot, zoom, hover, and drive browser tabs on your desktop; also published as munimtechnologies/computer-use | ✅ | ❌ |
| Computer History — opt-in activity timeline (not screenshots) that agents can reference | ✅ | ❌ |
Agent-chosen computers — computer_list / computer_send start a task on another connected machine (this Mac, SSH, T3 Connect, or a paired backend) without changing Run on |
✅ | ❌ |
| Resume on restart — running threads and agents pick up after the app closes | ✅ | ❌ |
Cross-thread references — type # to cite another thread; the agent can read it |
✅ | ❌ |
| Thread-to-thread messaging — agents list sibling threads and send work between them | ✅ | ❌ |
Agent-created threads — thread_create / thread_archive so an agent can spawn and tidy sibling chats in the same project |
✅ | ❌ |
| Sign in extra Claude/Codex accounts from Settings without leaving the app | ✅ | ❌ |
| Provider handoff — continue a thread with another provider or account from the model picker; native history when possible, otherwise a bounded handoff of recent work | ✅ | ❌ |
| Forgejo as a git host alongside GitHub/GitLab/Bitbucket | ✅ | ❌ |
| Cursor on by default with real permission-option mapping | ✅ | ❌ |
Goals — /goal keeps a thread working until the objective is met |
✅ | ❌ |
| Plugin marketplace — browse and install Codex, Claude Code, and Cursor plugins | ✅ | ❌ |
| Skills manager — cross-harness skills in Settings | ✅ | ❌ |
| Voice dictation — Codex-style mic in the composer (OpenAI or Groq) | ✅ | ❌ |
| Realtime voice — persistent OpenAI Realtime panel so you can talk with the agent, not only dictate | ✅ | ❌ |
| Agent notifications — desktop/browser alerts for approvals, questions, finish, and failure | ✅ | ❌ |
| Full-text sidebar search — search message content, not just titles | ✅ | ❌ |
| Sort threads by last user message | ✅ | ❌ |
| Recent-threads switcher — Ctrl/Cmd+Tab | ✅ | ❌ |
| LaTeX math in chat | ✅ | ❌ |
| Codex visualizations rendered inline | ✅ | ❌ |
| Reasoning cycle keybindings | ✅ | ❌ |
| Grok reasoning-effort picker | ✅ | ❌ |
| OpenCode context-window usage | ✅ | ❌ |
| Cursor account limits — Auto / API / monthly spend on the Limits strip | ✅ | ❌ |
| Rename environments | ✅ | ❌ |
t3 . opens a folder in the desktop app or a running server |
✅ | ❌ |
Installs alongside T3 Code — own bundle ID (com.munim.mtcode) and data directory (~/.mt) |
✅ | ❌ |
| Hosted web app — MT Code's own was retired; use T3 Connect or your own tunnel instead | ❌ | ✅ app.t3.codes |
Everything else T3 Code does — multi-provider agent control, checkpoints and diffs, remote access from the web and mobile apps, Connect tunnels — works here too.
Full docs live in docs/:
- Install and first run
- Permission modes
- Keyboard shortcuts
- Desktop notifications
- Goals
- Plugins
- Voice dictation
- Attachments
- Project settings
- Remote access from a phone or another machine
- Thread messaging
- Continue a thread with another provider
- Sending work to another computer
- Keeping app and server in sync
- Source control integrations
- Multiple accounts: Codex · Claude
- Run T3 Code as a background service
Building from source? Start at docs/internals/overview.md.
MT Code does not auto-merge pingdotgg/t3code. Upstream lands only when you explicitly ask an agent to merge it. Features built here are offered upstream as PRs when they fit; some MT Code features started as unmerged upstream PRs we adopted. Bug reports about MT Code builds belong on this repo's issues — please don't file MT Code problems upstream.
MT Code exists because T3 Code is truly open. Credit and thanks to the T3 team.