Use case: let AI work on a folder of your files

Who it's for: anyone with a folder of documents they keep meaning to sort out, summarize, or tidy up.

What you get: an agent that reads what's in the folder and does real work there, like writing a summary, drafting a document, or reorganizing notes. You can review and undo every change.

Time to set up: under a minute.

How it works

Normally, an agent can't touch your files. You give it permission one folder at a time by choosing a Working Folder for the chat. The agent can read and edit what's inside that folder, and nowhere else.

It can read plain text and code, and pull the content out of PDF, Word, PowerPoint, and Excel files. It can create those formats too.

Try it

1. Press ⌘; to open a chat.
2. Click Folder in the message box and pick a folder. For your first try, choose one you don't mind it changing, or make a copy.
3. Ask for what you want. Start with this one:

You'll see the work tick off as the agent reads the files and writes the new one. The new file appears as a card in the chat that you can open or preview.

Review and undo

Osaurus saves a copy of each file before and after the agent changes it, so nothing is final.

1. Open the File Changes panel. It appears in the top-right corner the first time a chat changes a file.
2. Check each change. The Timeline shows every change in order, with before and after.
3. Undo anything you don't want. Revert undoes one change, Revert File puts a file back the way it was, and Revert All in the panel's ⋯ menu puts back every file the chat touched.

Tip: If you edit a file yourself after the agent does, Osaurus leaves your edit alone when you revert, unless you choose to overwrite it.

More things to ask

Once the folder is attached, try:

• "Read the meeting notes in here and list every action item with who owns it."
• "Turn budget.xlsx into a one-page summary I can send to my manager."
• "Rename these files so they start with the date, like 2026-11-12-invoice.pdf."
• "Draft a reply to the client brief as a Word document."
• "Which of these contracts mentions a termination fee?"

Privacy, plainly

The folder stays on your Mac. With a local model, the files are read and written on your Mac and nothing is uploaded. With a cloud model, the parts of the files the agent reads are sent along with your message, the same as any cloud chat.

Want an agent that can answer questions from a folder every day, without attaching it each time? Set up a knowledge base.