The classes of Crawl 1st Edition: each one's class chart, features by level, proficiencies, skill points and starting equipment, followed by its subclasses. Everything here can be chosen in the Character Creator.
One-time setup. Paste a GitHub access key that can change this repo, then choose your admin password. The key is locked with your password before it's stored, so only someone with the password can use it.
Make a key on GitHub: choose only this repository, and set Contents to Read and write.
Use at least 12 characters. A few random words with a number works well.