it was silly, quick check out of curiosity what Opus 5 can do – and the first thing I saw was so impressive that it made me spend hours during weekend polishing it

here it is from history, without edits

> you're a veteran Postgres hacker and expert. I want 3D visualization of how Postgres works, for browser -- all its major components, presented as a 3d model, complex, with all parts zoomable, and animated, with controls -- checkpointer, bgwriter, autovacuum, walwriter, backends, walsender, etc etc etc. Imagine we need to build a 3d model of whole city. That's same level. We need this so engineers who are non-DB-experts would easily understand how it works. Design must be cool, modern, super cool, running all in browser, with controls, with camera position flying with arrow keys and mouse, zoomable, etc. Think deep how to implement it, which modern cool tech to use, and use ultracode to implement in a new directory (we'll commit it later). OK to use the most cool and most modern stuff. Think deep choose tools wisely and let's build an awesome in-browser 3d model of Postgres engine