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1. fontlex fontlex Public

   Compile math typesetting, Markdown rendering, and syntax highlighting into OpenType fonts. No JavaScript at runtime.

   HTML

2. iccnet iccnet Public

   A neural network inside an ICC color profile: PNGs of coordinates that unmodified color engines (ImageMagick, LittleCMS, sharp) paint as paintings

   Python

3. fenet fenet Public

   A handwritten-digit recognizer that runs inside SVG filters, no JavaScript

   HTML

4. tokcpu tokcpu Public

   A stock Hugging Face tokenizer that runs Brainfuck: one encode and one decode per clock tick

   Python

5. rexsum rexsum Public

   Check-digit validation (Luhn, GTIN, ISBN, ABA, BSN) in one regular expression, small enough for the HTML pattern attribute

   HTML

6. cssynth cssynth Public

   Compile flat images into short HTML/CSS for CSSBattle. Shorter than the human solutions on 56 of 66 targets, all at a 99%+ pixel match.

   HTML