I'm trying to make a skin that's decent looking without mods, while also using features from Ears for those that have that mod, as well as a more extensive model for those who use CPM.

Unless you have a snout in Ears, the top left block of free space is left untouched, which is great, since it has enough space for the gist link. However, currently it fills all the blocks line by line - which means it quickly goes into one of the occupied spaces.

Some issues I can spot relatively quickly:

• I don't think this can be done in a way that's forwards compatible (you can't abuse how it encodes data) so it would completely break on old versions.
• You'd either need a flag encoded, or simply try reading block-by-block instead of line-by-line if the checksum doesn't verify. The latter seems easier - you don't have to worry too much about trying to squeeze everything into the first line of the first block.