Undo for your whole project.

Build with Claude Code or OpenCode and one bad answer can wipe out yesterday's work. Library Mode keeps every version, brings any of them back in one click, and gives you a page to show what you made. For people who build with AI and would rather not learn git.

Start free See what people are sharing

Free for one project, with a public page to share it. Paid plans from $3 a month — see what you get.

Forty-five seconds, start to finish. It plays without sound — turn it on if you want the words read to you.

Why you need this

If you build things with Claude Code or OpenCode, your project lives in one folder on one computer. One wrong answer from the AI, one "clean this up" that goes too far, one spilled coffee — and the version that worked yesterday is gone. Developers protect themselves with tools built for developers. Library Mode does the same job, without asking you to learn any of it.

Undo, for whole projects.Every save is a version. Go back to the one that worked, in one click, without losing anything since.

Know what changed.Each version shows which files were added, changed or removed — so when something breaks, you can see where.

A copy that isn't on your laptop.Lose the computer, keep the project. Get it onto a new one with a single line.

Your keys stay private.Library Mode watches for passwords and keys in your files, warns you, and won't let a project go public while one is inside.

A page to show it off.Share a link; people can read about it, download it, or make their own copy.

"Doesn't Claude Code already do this?"

/rewind is for the last hour. This is for the whole project, for good.Claude Code's /rewind steps back inside one session, on one computer, and is gone when the session is. Library Mode keeps every version you save, off your machine, in plain words you can browse — and any version can become a link.

"Just use GitHub Desktop." It still expects you to learn developer.GitHub Desktop is a friendlier face on the same vocabulary, and it assumes you'll pick it up. Library Mode has three verbs — save, go back, share — and that's the whole thing.

Easy to share

Every project gets its own page on librarymo.de. It starts private — only you can see it. When you're ready, click Share it publicly and send the link to anyone. They don't need an account, a login, or any software.

Browse what others have shared on the Explore page.

01They can read about it. The page shows your project's description and its files, so a friend, a client or a hiring manager can see what you made and how it's put together.
02They can download it. One click gives them the whole project as a zip file, ready to open on their own computer.
03They can build on it. Anyone with a Library Mode account can click Make my own copy and get their own version to change — history included — without touching yours.
04You stay in control. Click Make it private any time and the link stops working. Your saved versions are never affected.

Fast start — about ten minutes, no experience needed

Works on Mac and Windows. You'll type nothing yourself: every step is a line you copy from this page and paste.

1
Start with your email.Enter your email, open the message we send, and click the link. That's your account. No password to remember.

⚡

The shortcut: let your AI do the rest.Already using Claude Code or OpenCode? Copy this prompt, paste it there, and it does steps 2–5 for you — you just click Allow when the browser opens.

Set up Library Mode (librarymo.de) on this computer, step by step:
1. Check whether the `uv` command exists. If not, install it (Mac: curl -LsSf https://astral.sh/uv/install.sh | sh — on Windows use the PowerShell installer from astral.sh/uv). If uv can't be installed, fall back to pipx.
2. Run: uv tool install librarymode
3. Run: librarymode connect — my browser will open a page where I click Allow. Wait for it to finish and confirm the connection worked.
4. Then save this folder's project to Library Mode with the note "first save", and tell me the link to its page.
If any step fails, explain what happened in plain language and how to fix it.

Prefer to do it by hand, or don't have an AI tool yet? Follow the steps below.

2
Open the command window.This is a plain window where you paste instructions for your computer.

On a Mac: press ⌘ Command+Space, type Terminal, press Return. A small window with a blinking cursor opens.

On Windows: click the Start button, type PowerShell, press Enter. A blue window with a blinking cursor opens.

Keep it open — you'll paste the next three lines into it, one at a time. To paste: click inside the window, then press ⌘ Command+V on a Mac or Ctrl+V on Windows, then press Return / Enter. Wait until the text stops scrolling and the cursor is blinking again before pasting the next line.
3
Install the helper that installs things.Copy the line for your computer, paste it into the window, press Return / Enter.
Mac:
```
curl -LsSf https://astral.sh/uv/install.sh | sh
```
Windows:
```
powershell -ExecutionPolicy ByPass -c "irm https://astral.sh/uv/install.ps1 | iex"
```
When it finishes, close the window and open a new one (repeat step 2) so the computer notices the new helper.
4
Install Library Mode.Paste this line and press Return / Enter:
```
uv tool install librarymode
```
Mac: a box may pop up offering to install command line developer tools. Click Install, wait for it to finish, then paste the line again.

Windows: one extra helper is needed. Go to gitforwindows.org, click Download, open the downloaded file and click Next on every screen. Then close the blue window and open a new one (step 2).
5
Connect your computer to your account.Paste this line and press Return / Enter:
```
librarymode connect
```
Your web browser opens a page from us. Click Allow. Library Mode also adds itself to Claude Code and OpenCode for you, if they're installed. You only ever do this once per computer.
6
Save your first version.Open your project in Claude Code or OpenCode and say: "save this project to Library Mode". That's the whole habit — say it again whenever something works.

Then, whenever you need it: "go back to version 3", "what changed since yesterday?", or "share this project". Stuck on any step? Ask us — it usually takes two minutes. The Help page has more.

Keep every version. Lose nothing.

Start free — no card, no password