Munin Assistant for Google Docs

Munin Assistant is a Chrome extension that adds an AI assistant panel to Google Docs. The assistant reads the open document with tools and edits it on request: it fixes, rewrites, inserts and formats text, and every edit can be undone. It works with Munin, OpenAI or Anthropic, using your own API key.

Features

Edit the selection: select text and ask; the assistant replaces it or answers in the chat.
Agentic reading: the assistant reads the parts of the document it needs, line by line, and searches it.
Precise edits through the Google Docs API: each edit is checked after the write and has an Undo button.
Large edits ask for your permission first.
Auto and Manual modes: Manual only answers in the chat and never changes the document.
Document instructions: standing instructions per document, such as style or terminology.
Commands /research, /code and /chat; /research can search the web and lists sources.
Chats per document, stored in your browser; light and dark themes.

How it uses your Google account

Signing in with Google is optional. If you sign in, the extension uses the Google Docs scope to read the document open in the tab and apply the edits you ask for, and reads another document only after you allow it; it also reads your account's email and name to show which account is signed in. Document text goes only to the LLM provider you chose in the settings, with your own API key, and nothing is sent to the author of the extension. Details are in the privacy policy.

Install

The extension is installed from source as an unpacked extension (Chrome 116 or newer); it is not in the Chrome Web Store yet. The source code will be published under the MIT license. Once you have it, open chrome://extensions, turn on Developer mode, click Load unpacked and select the folder with manifest.json. Then open a Google Doc, click the extension icon and enter your provider's API key in the settings.

License

MIT.