What’s new in Muse Code 1.4: native Windows, /model, skills import, and more

First, check your version

Meta’s official changelog lists Muse Code releases by version number, but the entries are undated, so you can’t tell from the page when a given feature reached you. The reliable check is your own install:

muse --version

If you’re below 1.4.10, update. Meta’s docs show only the installer, so re-running it for your platform (see the next section) is the straightforward route. This guide covers 1.4.2 through 1.4.10 and groups the changes by theme rather than by release, with the version noted on each item so you can tell whether you have it.

Windows now installs natively

At launch, Muse Code on Windows meant WSL2. That is no longer true, and our install walkthrough now covers both routes. Meta’s docs now show a native PowerShell installer:

irm https://dev.meta.ai/install.ps1 | iex

On macOS and Linux the command is unchanged: curl -fsSL https://dev.meta.ai/install.sh | sh. Meta hasn’t announced when the Windows installer appeared; a third-party guide documented it by September 22, 2026.

Native Windows has a few differences you should know about:

• The agent runs commands in PowerShell instead of Bash.
• The sandbox may trigger a UAC prompt the first time it initialises.
• Voice input is unavailable.
• Inter-session messaging is unavailable; it works on macOS and Linux only.

WSL2 still works, because it is Linux. Stay on it if you rely on Bash tooling or session messaging. There is still no desktop app and no official VS Code extension.

Models and /model

• 1.4.5: /model <model-id> switches directly, for example /model muse-wonder-1.0, without opening the picker. This matters more now that Muse Wonder is available.
• 1.4.7: the /models picker gained a reasoning-level step.
• 1.4.4: -c key=value overrides a config value for a single run, which is useful for trying a different setting without editing your config file.

Sessions and resume

• 1.4.3: /resume <id-or-name> reopens a specific session.
• 1.4.5: sessions are named automatically, so /resume by name actually becomes practical.
• 1.4.7: /goal cancel and /goal stop end a running goal.
• 1.4.8: you can follow subagents live as they work.
• 1.4.2: background Bash commands return a Work ID you can refer back to.

muse serve, the SDK, and the session protocol

If you drive Muse Code from your own tools rather than the terminal, most of the 1.4 work landed here:

• 1.4.2: muse serve accepts multiple workspace roots and takes --provider and --model flags. The same release added muse voice transcribe.
• 1.4.5: muse serve keeps up to 256 sessions.
• 1.4.6: plugins and marketplaces are available through the session protocol, and muse serve gained an Auto-review reviewer.
• 1.4.9: --disable-request-user-input stops the agent from waiting for answers during unattended runs, and MCP calls now include the tool-call ID.

Plugins, skills, and hooks

• 1.4.3: plugin management is on by default.
• 1.4.4: MCP configuration can reference environment variables, so secrets can stay out of config files.
• 1.4.5: you can import Claude or Codex skills. If you already built skills for another agent, you don’t have to rewrite them. Our bundled skills guide covers what ships with Muse Code.
• 1.4.6: new PostToolBatch and StopFailure hooks.
• 1.4.8: --preset empty starts the agent with no built-in tools, a clean base for tightly scoped plugins.

Images, video, and /blender

• 1.4.4: you can attach video to a turn.
• 1.4.7: the agent can generate and edit images when an image model is available.
• 1.4.10: /blender rebuilds reference images as editable Blender scenes, and Computer Use needs fewer tool calls.

Safety and permissions

These are easy to skip in release notes but worth knowing:

• 1.4.6: Contributor mode is on by default for subscribers. In exchange for more plan usage, Meta may use your content to train future models. Turn it off in /settings if that isn’t acceptable; your allowance goes down when you do. See Contributor vs. Standard.
• 1.4.6: approvals for find -exec and find -delete are safer.
• 1.4.8: fixed a bug where background requests could use Contributor mode after you had turned it off. If you opted out on an earlier 1.4 build, update.
• 1.4.8: permission profiles that can’t be enforced are refused at launch.
• 1.4.10: the sandbox can no longer read or change stored config.

Enterprise settings

• 1.4.3: ca_bundle, plus use of the system certificate store, for networks behind a corporate TLS proxy.
• 1.4.4: session_retention_days controls how long sessions are kept.

Combined with the 1.4.8 permission-profile check and the 1.4.10 sandbox change, these make 1.4.10 a sensible minimum version for any managed rollout.

Should you update?

Yes. Two of the changes above are privacy and safety fixes (the 1.4.8 Contributor-mode bug and the 1.4.10 sandbox restriction), and several newer features, such as switching straight to Wonder with /model, assume a recent build. Run muse --version, re-run the installer if you’re behind, and use muse --help to see the exact commands your version supports. Our changelog page tracks releases as they land. New to the tool? Start with our getting-started guide.