Claude Opus 5 builds a 16-bit VM, a live debugger and even a PNG encoder on its own
Dry-Foundation9720 · reddit · 2026-07-25
A user asked Claude Opus 5 to build something ambitious, and it ended up creating a 16-bit virtual machine called NOVA 16-bit with an assembler, a live debugger, and a browser-based execution UI.
The interesting part, according to the poster, was not just the code:
- The VM was visualized in an HTML canvas while instructions executed.
- Claude also wrote a PNG encoder from scratch without being asked.
- It wanted to render the framebuffer to a file so it could inspect the pixels and fix a muddy fractal palette.
- The user says it detected the palette problem and corrected it.
The screenshot shows a full coding-agent workspace with the VM UI, source code, debugger, and runtime panels.
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