One tedious task in add-on development for me is preparing readmes for add-on pages in AnkiWeb, as AnkiWeb only allows a limited set of HTML tags and has special treatment for newlines. I used to just copy README.md used for GitHub and modify it manually for the AnkiWeb description (Replacing disallowed tags, fixing relative links, etc.). I eventually wrote a script to automate this last year but found it’s inconvenient to use, so I wrote a VS Code extension for that. I hope this will be useful for add-on/deck authors until AnkiWeb gets Markdown support (@dae I hope this is on your to-do list 
).
(I’d appreciate someone contributing a nicer icon 
)