So, after wasting a bunch of time trying to pack a whole assembler into my text editor, I've realized that I was just making a mess of things and undid it all.

Instead, I've tried something pretty simple:

- when I press ctrl+b, it sends the file name that I'm working on out.

- I've added an interactive mode to the assembler that constantly re-assembles incoming filepaths.
It makes for something like interactive development, in something like 2000 bytes.