Muse Companion

Your bridge between VS Code and your Muse assistant — move code, context, and whole projects between your editor and your AI chat in one click.

Features

💬 Copy Selection for Muse

Select any code, right-click → Muse: Copy Selection for Muse. It copies the snippet wrapped with its file name and language as a ready-to-paste Markdown prompt. Paste it into your Muse chat and your assistant instantly has the context it needs.

📄 Copy Active File for Muse

Same idea for the whole file — from the command palette or the Explorer right-click menu.

📦 Bundle Project for Muse

Working on something bigger? Muse: Bundle Project for Muse walks your project folder (smartly skipping node_modules, .git, build output, and binary files) and generates a single muse-bundle.md containing every relevant source file. Send that one file to Muse and it can see — and work on — your entire project.

Bundle size caps are configurable:

• muse.bundleMaxFileKB (default 200) — max size per file
• muse.bundleMaxTotalKB (default 800) — max total bundle size

💬 Muse Chat (in the editor)

Muse: Open Muse Chat opens a chat tab beside your code, in the style of the Claude Code panel. Ask Muse to work on your project and watch the conversation stream in: your message, Muse's reply, every tool it runs (with a diff summary like +3 −1 in 1 file and its output), and permission prompts you answer with a click (allow once, allow for the session, deny). A Stop button interrupts a running turn and New chat starts fresh.

Under the hood the extension runs Muse Code (muse serve) on your open project folder, so Muse reads and edits your local files directly. If Muse Code isn't installed, the extension offers to install it (irm https://dev.meta.ai/install.ps1 | iex on Windows, curl -fsSL https://dev.meta.ai/install.sh | bash on macOS/Linux). No VS Code restart is needed afterwards. Muse: Check Setup shows what is ready and what is missing (project folder, Muse Code, sign-in) and offers to fix it. Muse: Sign In to Muse Code runs the browser sign-in and detects when the login is saved.

The Muse web chat (muse.ai) forbids being embedded in other apps, so this panel is built on Muse Code instead. Open chat in browser still opens the website.

⚡ Muse Code in the Terminal

Muse: Open Muse Code in Terminal runs the plain Muse Code terminal UI in your project folder, if you prefer it.

🔌 Send via API (coming soon)

A placeholder for the future: the day Meta ships a public Muse API, the muse.apiEndpoint / muse.apiKey settings are ready and this command lights up. Until then it points you at the copy/paste workflow above.

🛠️ Fix This Error

Put your cursor on a line with a red squiggle and run Muse: Fix This Error (right-click menu too). It copies the exact diagnostic message plus the surrounding code as a prompt — paste it into chat and get a fix.

❓ Ask Muse About Selection

Muse: Ask Muse About Selection asks you a question first ("Is there a bug here?", "How can I make this faster?"), then bundles it with your selected code (or the whole file) into a ready-to-paste prompt.

✨ Apply Code from Clipboard

The loop-closer: copy a code answer from your Muse chat, then run Muse: Apply Code from Clipboard. It extracts the code block and applies it — over your selection, replacing the whole file, or inserted at your cursor. No more manual copy-paste-and-reindent.

📌 Muse Sidebar

A dedicated Muse icon in the activity bar opens a sidebar with every command one click away — chat, code actions, bundler, and the Muse Code terminal launcher.

Requirements

• VS Code ^1.80.0
• Muse Code — needed for the in-editor agent (the extension can install it for you)

Getting started

1. Install the extension.
2. Open any project.
3. Press Ctrl+Shift+P and run Muse: Open Muse Chat.
4. Select some code, right-click → Muse: Copy Selection for Muse, paste it into the chat, and watch your assistant work with full context.

Extension settings

Known limitations

This extension cannot message your assistant directly — that requires a public Muse API, which doesn't exist yet. Everything it does today is the real, working version of the loop: grab code with context in VS Code → paste into Muse chat → get code back. The muse.sendViaApi command is the single function to implement when an API ships.

Release notes

0.4.1

• Billing errors from Meta (HTTP 402) now show Open billing / Subscription guide buttons in the chat banner
• New setting muse.credentialStorage (system | file): choose file if the browser sign-in succeeds but the login is never saved (Windows keychain write failure)

0.4.0

• Muse Chat: a real chat panel in the editor (streaming replies, tool-call cards with diff summaries, click-to-approve permission prompts, Stop, New chat), driven by muse serve. Replaces the blank web page.
• "Open Muse Code in Editor" is now Open Muse Chat; the terminal UI remains available as Open Muse Code in Terminal

0.3.2

• Sign-in awareness: Muse: Check Setup now shows whether you are signed in (account login or META_API_KEY) and Muse Code launches only after offering to sign you in
• New command Muse: Sign In to Muse Code — runs muse login and tells you when the login has actually been saved

0.3.1

• Setup check before launching: prompts you to open a project folder and to install Muse Code (one click, output in the "Muse Companion" log) if missing
• Finds Muse Code in its installer folder right after install — no VS Code restart needed
• New command Muse: Check Setup (also in the sidebar)

0.3.0

• Replaced the blank in-editor chat page (the site blocks embedding) with Muse Code hosted in an editor tab, working on your open project folder
• Windows-aware Muse Code launch and one-click installer prompt
• Sidebar buttons updated

0.2.3

• Fixed the Muse sidebar showing an empty panel (view is now declared as a webview)
• New monochrome activity-bar icon that follows your theme
• Fixed muse.bundleMaxFileKB, muse.bundleMaxTotalKB and muse.apiEndpoint settings being ignored
• Removed the startup diagnostic notification

0.2.2

• Diagnostic build: activate on startup + visible activation ping

0.2.1

• Fixed sidebar not loading in some setups (rely on automatic view activation; allow untrusted/virtual workspaces)

0.2.0

• New: Fix This Error (diagnostic + code context in one prompt)
• New: Ask Muse About Selection (question + code bundling)
• New: Apply Code from Clipboard (paste chat answers straight into files)
• New: Muse sidebar panel in the activity bar with all commands

0.1.1

• Added extension icon
• Expanded marketplace README

0.1.0

• Initial release: copy selection/file, project bundler, in-editor chat page, Muse Code terminal launcher, API placeholder.

Built with Muse. Published by FletMedia.

Muse Companion is an independent, community-made extension. It is not affiliated with, endorsed by, or sponsored by Meta. "Muse" and "Meta" are trademarks of their respective owners.