When I originally published this manifesto, I represented the negative digits with the “negative circled dingbats” Unicode characters — ❶, ❷, ❸, and so on. When I switched to my current publishing format (an exported Obsidian vault) it became much easier to use LaTeX, so now they’re represented with overlines; , , and so forth.
I also considered writing the digits upside-down, but rejected that because I’d have to use CSS to represent that on-screen, and then this page wouldn’t work in plain text. (Not that this page works well in plain text to begin with.)
Another alternative I could have used was the letters A through H, as in normal heptadecimal. But then, should A be or ? It would be weird to count up and go “”, but it would also be weird to be counting backwards and go “” Also, I briefly tried this when handwriting and I had to keep stopping to remember which letter represented which digit.