GoKawiilEsolang 'Folders' resurfaces with 2026 update, uses directory structure as source code
Folders is an esoteric programming language in which program logic is encoded entirely through the nesting and count of empty folders rather than text, with folder names ignored except for alphabetical sorting. Originally built for Windows, where empty folders consume no disk space, the project has an updated 2026 release and a public implementation on GitHub along with a browser-based emulator for non-Windows users.
GoKawiil's interpretation of the reporting above, not reported fact.
The project is a satirical take on language design, pushing the idea of 'dematerialized code' to its logical extreme by treating file-system structure itself as the only carrier of meaning. It's unlikely to see practical use, but esolangs like this often serve as playful explorations of computation theory and abstraction rather than production tools.
- Folders encodes programs purely through folder nesting and counts, not text or names
- It originated as a Windows-specific language exploiting the fact that empty folders use no disk space
- The interpreter avoids temp files, instead storing runtime data as named temporary folders
Source: danieltemkin.com, 2026-10-16
Published there as: “The Folders Programming Language”
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