GnollHack wiki contains the official information about GnollHack, a remastered and enhanced version of NetHack.
GnollHack wiki can be accessed at https://wiki.gnollhack.com/.
This repository contains the content files of GnollHack wiki, which are basically several images and Markdown files using GitHub/Gollum-style syntax. You can learn more about the syntax in Gollum wiki. Most importantly, wikilinks with an alias follow the convention [[Alias|Page Name]] instead of [[Page Name|Alias]] syntax of MediaWiki.
The wiki is built upon Gollum wiki software.
If you want to contribute to the wiki, please read these instructions: Editing Wiki with Visual Studio Code
Editing the wiki is more heavy-weight than that of normal wikis, since you need to install Git and Visual Studio Code and learn to make pull requests.
To make editing easier, we have our own Visual Studio Code extension called Foam for Gollum. You are free to suggest enhancements to it.
The source code of GnollHack is available on GitHub in its own repository.