One prompt drove Opus 5.5 for ~30 hours to build a working computer from 277k logic gates
FinanceYF5 · x · 2026-10-17
FinanceYF5 shows a project where Claude Opus 5.5 in Ultracode mode ran fully autonomously for 30 hours with a single prompt to build a genuinely working computer from scratch: 277k logic gates implemented in JavaScript, running an OS and a playable game on top — not a UI mockup.
- Stack includes CPU, memory, assembler, a micro OS, and a game
- Full 3D visualization lets you zoom from the game down through chips to individual gates and watch signals flow
- The complete prompt is shared: real implementations only, game must run on the built gates, framed as "proving you could have invented the computer"
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