Was experimenting with something similar... working on a modern QWK reader, and this is kind of a core thing to deal with, rendering ansi in messages as html. (synchronet color codes don't work right and renegade color codes untested).
Was an initial experiment with Claude Code, but kind of a cool result that's pretty close to what I want.
Author here, yeah I apologize for the misnomer. I could render it with actual ASCII but it was too slow because of needing to process it on the CPU. My method here is actually done all on the GPU and draws glyphs similar to how fonts are drawn. Well actually I'm using signed distance functions to draw the glyphs, but the glyphs are ASCII-esque.
