Ask HN: Best tool to create a user guide for an open source project?

Github has a Wiki feature as part of the repo.

You can make a docs folder with more markdown, you can relative link them on GitHub.

I use Hugo for https://cuetorials.com and my other sites. Generally would recommend markdown to html setup.

Could you share the repository link? You may receive useful feedback from people looking at it.

Read a little about Sphinx the other day. Might be an option.