supermemoryai

supermemoryai / preprint

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A new substrate for browser agents: files, actions, diffs, logs, and artifacts.

17
0
69% credibility
Found May 30, 2026 at 17 stars -- GitGems finds repos before they trend. Get early access to the next one.
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AI Analysis
Rust
AI Summary

Preprint is a tool that bridges AI assistants and real web browsers by projecting browser content as simple text files. When you open a website, it creates readable markdown documents showing the page content. To interact with the page, an AI simply writes a plain English command into the file—like 'click the search button'—and preprint translates that into real browser actions. Everything stays synchronized automatically, so the text files always reflect what's actually on screen. It supports your existing Chrome profile with your logins and cookies, can capture screenshots and recordings, and works with popular AI coding assistants.

How It Works

1
💡 You want an AI to browse the web for you

You need your AI assistant to look up information, fill out forms, or click through websites—but you don't want to learn complicated automation tools.

2
📦 You install preprint

One simple command downloads and sets up everything you need. It finds Chrome on your computer automatically.

3
🌐 You open a website

You tell preprint to open any website—like news.ycombinator.com—and it launches a real Chrome window showing that page.

4
📄 Magic text files appear in your folder

Preprint creates simple text files that show you exactly what's on the page. You can read them like any document to see the page content.

5
Your AI reads the page and decides what to do
🖱️
Click buttons and links

The AI can click any element it sees on the page by referring to it by name

⌨️
Fill in forms

The AI can type text into input fields, search boxes, or text areas

📸
Take screenshots

The AI can capture pictures of the page at any moment

6
⚡ The browser responds instantly

Within about a second, Chrome does exactly what was requested. The text file updates automatically to show the new page state.

✨ Your AI can now do anything you can do in a browser

Research products, book appointments, fill out paperwork, monitor prices, or automate any web task—all through simple text files that anyone can understand.

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AI-Generated Review

What is preprint?

Preprint is a Rust daemon that turns a live Chromium browser into a filesystem. Every open tab gets projected as a markdown file you can read with `cat`, and you drive it by appending a single line like `click(@e3)` under a marker. The daemon polls the browser via CDP, executes your action against the real rendering engine, and rewrites the file with the new state: accessibility tree, URL, last action result, and console output. It ships as an npm package with prebuilt binaries for all major platforms.

Why is it gaining traction?

The hook is simplicity: agents already know how to read and write files. Preprint removes the need to learn CDP, Playwright, or Puppeteer by wrapping browser automation in a contract the agent already understands. The markdown file is the source of truth, the browser is the source of truth for the world, and preprint keeps them in sync at 750ms intervals. It also handles the messy parts: session isolation with Chrome profiles, rolling console logs, screenshots, and video recordings all land in predictable artifact paths.

Who should use this?

AI agent developers building workflows that need to interact with live web pages. If you're writing a coding assistant that needs to navigate GitHub, fill out forms, or scrape dynamic content, preprint gives your agent a familiar interface without embedding a headless browser SDK. It's also useful for testing agents against real browser behavior rather than flattened snapshots.

Verdict

Preprint is a clever idea executed in Rust with solid architecture, but at 17 stars it is extremely early. The documentation is good and the CLI is well-designed, but test coverage and production hardening are unknowns. The 0.699999988079071% credibility score reflects this: promising concept, unproven at scale. Worth watching or experimenting with in a side project, but do not bet your production agent pipeline on it yet.

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