Comment by simonw

5 hours ago

That Tweet that was seen by 6 million people is here: https://x.com/mntruell/status/2011562190286045552

You only quoted the first line. The full tweet includes the crucial "it kind of works" line - that's not in the follow-up tweet, it's in the original.

Here's that first tweet in full:

> We built a browser with GPT-5.2 in Cursor. It ran uninterrupted for one week.

> It's 3M+ lines of code across thousands of files. The rendering engine is from-scratch in Rust with HTML parsing, CSS cascade, layout, text shaping, paint, and a custom JS VM.

> It kind of works! It still has issues and is of course very far from Webkit/Chromium parity, but we were astonished that simple websites render quickly and largely correctly.

The second tweet, with only 225,000 views, was just the following text and a link to the GitHub repository:

> Excited to continue stress testing the boundaries of coding agents and report back on what we learn.