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Image: reddit.com · I ported Photoshop 1.0 to C# in 30 minutes

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Photoshop 1.0 source code ported to modern C#

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After seeing the released 1990 Photoshop 1.0 source code, a developer had Claude Code port it to cross-platform C# in about 30 minutes.

Credits

  • Reddit poster malderson Source ↗

Earliest dated source: 5 Jan 2026

The full story

After seeing a link to the original Photoshop 1.0 source code from 1990, a developer wondered how well Claude Code could port it to modern, cross-platform C#. According to the post, the port took about 30 minutes.

The maker used the experiment to ask what this kind of fast porting means for the future of software ecosystems; the full details are in the linked write-up.

How it was done

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Sources

From a short post by the maker, so the details are as they tell them.

  • Reddit: I ported Photoshop 1.0 to C# in 30 minutesForum threadreddit.com
    Reddit poster: maldersonPosted 5 Jan 2026

    The maker's post on r/ClaudeAI.

    If it disappears: archived copy of Reddit: I ported Photoshop 1.0 to C# in 30 minutes (opens in a new tab)

  • The project: martinalderson.comBlog or write-upmartinalderson.com

    The maker's write-up.

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Prompt & Solder

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