I've turned the arrow and website repos into a single text file with
https://github.com/chand1012/git2gpt, uploaded them to the GPT and provided very basic instructions on where to search or get from retrieval based on the type of question.
There is no strategy to keep it up to date, if I find people use it I will instead use the official Open AI assistant API and provide some kind of frontend for it. Using the API I can easily keep it up to date with a github action that triggers when there are changes on the repos or in a schedule.