Alexandr Wang@alexandr_wang · Chief AI Officer, Meta
harjot here built a pretty sick unofficial muse code app for windows!
7:50 PM · Sep 17, 2026 · 37.7K Views
v0.21.9Read the release notes
Muse Code, without living in the terminal.
Same Muse Code. Same subscription. Better interface.
A free, open-source desktop and web app built only for the muse CLI, with every project, session and diff in one window.
Try it in your browser firstUnofficial community project. Not affiliated with Meta.
Cosmo Du@Answeror · Muse Code, Meta
really impressive desktop app by @harjjotsinghh built on github.com/meta-models/mu…
11:02 AM · Sep 17, 2026 · 3,086 Views
Michael Douglas@mjdouglas · Muse Code, Meta
Super impressive community-made desktop app for Muse Code. Well done, Harjot!
7:12 AM · Sep 17, 2026 · 2,435 Views
0:00 / 0:00
MIT licensedFree, no paid tier
No second billRuns on your Muse Code plan
Your own loginCredentials stay in muse
Local stateSQLite on your machine
Everything a session needs, in one window
Projects, threads, diffs, approvals and cost live side by side, so you stop hunting through terminal tabs.
Every project, grouped
Threads grouped by folder, worktrees included. Resume any of them in one click.
Inline diffs
Every edit lands in the thread as a diff, right where it happened. No scrollback digging.
src/daemon/host.ts+6-3Edited
@@ -10,11 +10,14 @@ openWorkspace
Approvals stay approvals
Every approval is surfaced the moment it arrives. None are batched or bypassed.
Muse Code wants to run a shell command
Nothing runs until you decide.
$ npm test -- routes/projects
Try it: this card works.
Cost, in the open
What each thread would cost at API rates, so you see what your plan is doing.
Cost at API rates, 30 days
$5.29
$5.51 saved by cache
- muse-spark-1.3
- $4.55
- muse-spark-1.3 contributor
- $0.74
Sample figures
Keyboard first
Command palette, slash commands and a model picker. Reach any thread by keyboard.
Search threads, projects and actions⌘K
- New thread⌘⇧O
- Toggle sidebar⌘B
- Refresh threads from Muse Code
- Use light theme
/plan/review/compact!git status
Press ⌘K inside any live demo to open it.
One UI, two shells
The same React interface ships as a Tauri desktop app and as a web app pointed at a remote daemon.
Same daemon, same threads, either way
Helicon
your-server:4186
Try the app right here
This is the real Helicon interface running on sample data in your browser. Pick a screen, then click around: open threads, approve a command, or send a message.
A thread waiting on your approval. Allow the test run and watch the turn finish, or send a message of your own.
ThreadLive demo, try it
No terminal scraping
A local daemon spawns one muse serve host per workspace and speaks the Muse Code Session Protocol through Meta's official MIT @muse-code/sdk.
Auth is your own muse login. Helicon never stores credentials, and all state is local SQLite.
- Auth from muse login
- Local SQLite
- Windows: native Muse Code, or WSL2 with path translation
- Helicon UITauri desktop app or web app
- Local daemonSQLite state, one host per workspace
- muse serveMuse Session Protocol via @muse-code/sdk
Where Helicon fits
Helicon is one of several ways to run Muse Code. It is not the only GUI, and it is not official.
Runs on Windows
- Helicon
- Installer, native or WSL2
- Editor extension
- Via your editor's WSL setup
- Switch harness
- Varies
Billing
- Helicon
- Your Muse Code subscription
- Editor extension
- Your Muse Code subscription
- Switch harness
- Usually its own API billing
Lives where
- Helicon
- Standalone app or web
- Editor extension
- Inside the editor
- Switch harness
- Its own harness
Several repos at once
- Helicon
- Sidebar, grouped by directory
- Editor extension
- One window per project
- Switch harness
- Varies
Approvals
- Helicon
- Surfaced, never bypassed
- Editor extension
- Editor-dependent
- Switch harness
- Harness-dependent
| Criteria |   Helicon | Editor extension | Switch harness |
|---|---|---|---|
| Runs on Windows | Installer, native or WSL2 | Via your editor's WSL setup | Varies |
| Billing | Your Muse Code subscription | Your Muse Code subscription | Usually its own API billing |
| Lives where | Standalone app or web | Inside the editor | Its own harness |
| Several repos at once | Sidebar, grouped by directory | One window per project | Varies |
| Approvals | Surfaced, never bypassed | Editor-dependent | Harness-dependent |
Install in a few minutes
Pick your platform. You need the muse CLI signed in first; Helicon uses that login.
Windows
Installer with auto-update. Muse Code runs natively on Windows; WSL2 still works, with path translation both ways.
Install Muse Code for Windows in PowerShell.
irm https://dev.meta.ai/install.ps1 | iexSign in once.
muse loginRun Helicon_0.21.9_x64-setup.exe from the latest release.
The installer is not code signed yet, so SmartScreen may warn: click More info, then Run anyway. Already running Muse inside WSL2? Helicon uses that when native Muse is not installed. Set HELICON_MUSE_RUNTIME=wsl to keep WSL when both are.
Download for WindowsBefore you install
Billing, credentials, Windows, and whether any of this is official. Straight answers.
No. Helicon is an unofficial community project, MIT licensed. It is not made, sponsored or endorsed by Meta. It is a client for the Muse Code CLI, and has nothing to do with the Muse assistant app for Mac. "Muse" and "Muse Code" are trademarks of Meta, used here only to say what Helicon works with.
No. Helicon uses your existing Muse Code subscription through the muse CLI. There is no second bill.
With the muse CLI, from your own muse login. Helicon never stores or handles them.
Yes. Sessions started in the terminal TUI show up in the sidebar with full history, and you can resume them.
The macOS builds are not Apple-notarized yet. On macOS 15 or later, open Helicon once, click Done, then go to System Settings > Privacy & Security and click Open Anyway. On macOS 14 or earlier, right-click the app and choose Open. Or run xattr -dr com.apple.quarantine /Applications/Helicon.app in Terminal.
Yes. The same UI ships as a web app that can point at a daemon running elsewhere.
Muse Code runs natively on Windows now, and Helicon runs it directly: your own Windows paths, PowerShell for shell commands, no WSL. Muse Code inside WSL2 still works, and Helicon uses it when native Muse Code is not installed.
What each thread would have cost at Meta's published per-token rates. It is not a bill, just the meter reading, so you can see what your subscription did.
Yes. Command palette, slash commands, and a model and reasoning-effort picker cover everything, with full keyboard operation throughout.
No. Muse Code, the coding agent Helicon drives, needs a Muse Code plan or pay-as-you-go billing on Meta's Model API. The free Muse app is a different product and does not include it. Helicon itself is free and adds no cost of its own.
Just the muse CLI, logged in with your own muse login. The desktop app ships its own Node.js. Running from source or hosting the web app needs Node 22+ yourself.
Only to check for updates. The desktop app asks helicon.sh whether a newer version exists, and that request tells us an install is alive: the platform, the version, and a weekly hash of the IP it came from. Nothing about your code, prompts, threads or files ever leaves your machine, and there is no account.
Yes. MIT licensed, no paid tier, source on GitHub. It uses your existing Muse Code subscription, so there is no second bill.
Bring your threads out of the terminal.
Free, MIT licensed, and running on the Muse Code subscription you already have.