if you want a parser/render for viewing/displaying archived chosts elsewhere, look no further than the chutils repository!
as part of the custom bookmark feed, we designed and wrote a full, custom html renderer for cohost's json post format. it's written entirely in vanilla js, doesn't infringe upon cohost's source code, and only uses external libraries for markdown parsing and sanitisation, while giving a nearly 1:1 html output.
feel free to contact us at @/dragongirlsnout on discord if you have questions about how to use or adapt it for your own projects. if there's enough interest, i could also release it as a separate package.