The drifblim assembler has a tiny hidden feature - it's not really a feature, it's more of a of side-effect from some other system - that allows to live-reload a project.

If you create a .drifblim file, fill it will an input and output path, and a non-zero value. The assembler will prefill its zero-page with the content of the file on load.

So that allows me to never have to re-assemble a #uxn rom when I work. It's kind of hard to explain, so I made a little video.

https://git.sr.ht/~rabbits/drifblim#project-mode