FWIW, org's HTML export is about 4000 lines of elisp, and it is pretty well modularized. https://git.sr.ht/~bzg/org-mode/tree/main/item/lisp/ox-html.el https:/

FWIW, org's HTML export is about 4000 lines of elisp, and it is pretty well modularized. https://git.sr.ht/~bzg/org-mode/tree/main/item/lisp/ox-html.el https://git.sr.ht/~bzg/org-mode/tree/main/item/lisp/ox-html.... The publish front end is in https://git.sr.ht/~bzg/org-mode/tree/main/item/lisp/ox.el https://git.sr.ht/~bzg/org-mode/tree/main/item/lisp/ox.el and https://git.sr.ht/~bzg/org-mode/tree/main/item/lisp/ox-publish.el https://git.sr.ht/~bzg/org-mode/tree/main/item/lisp/ox-publi...