Retro Windows 3.1 shell recreated with AI in under an hour

A developer used Claude to create a clone of the Windows 3.1 Program Manager, dubbed ReProgman. The 12-16MB application runs on Windows 11 and macOS, offering a nostalgic interface. The code is open-source under MIT license.
Developer Mayuki used Claude Code to generate an initial version of ReProgman in about an hour, followed by refinements. The finished application is a lightweight 12-16MB portable tool that requires .NET SDK 10.0+ and is released under the MIT license.
Mayuki admits the nostalgic appeal wears off after roughly thirty seconds of interaction. This modern recreation offers an alternative to running the original operating system on contemporary hardware, a feat recently demonstrated on a high-end Ryzen and RTX setup.
This lightweight recreation could appeal to nostalgic users and developers interested in retro UI design, offering a low-cost way to revisit early 90s computing without legacy hardware. It may also highlight the growing accessibility of AI-assisted coding, allowing rapid prototyping of functional software. However, its practical utility is limited, as the creator admits the novelty fades quickly, suggesting such projects may serve more as cultural curiosities or educational tools than everyday applications.