Personal solutions for AoC, though not all days nor parts nor years. Some might yet to be processed through and checked for bad old code and copypaste and such.
A mess of Lua stuff, with a random C program thrown in at some point. Not really made to be readable easily by anyone back then.
Currently written in Deno flavoured TypeScript, except for Day 1 which is plain JS that can be pasted into browser.
Days 1 through 3 are designed to be run in the Developer Tools of the browser, just point it at the page with input and it will run. Day 4 (and onwards, probably) is in Deno like 2020