Worked Claim only
An old FoxPro program reverse engineered inside DOSBox
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An HN comment: Claude set up DOSBox and worked through the old program to document it.
The full story
A Hacker News commenter used Claude to reverse engineer an old FoxPro program. Claude set up DOSBox, went through every screen and examined whatever files it could reach. In a single week the rebuilt version was, in their words, 99% the same. Another commenter described decompiling a childhood game with Ghidra and recompiling it for the browser in under 40 minutes.
How it was done
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Sources
From a passing comment or social post, so the details are thin.