Rivers Cuomo outlined Riverpedia as such:
Please add articles. Try writing in the first person perspective, as if you're me. For example: "And then I moved to Los Angeles". Actually, just starting a new article can serve as a prompt for me to answer something you're curious about. I guess I'll go through it from time to time and flesh it out. Feel free to use html, links, and any other features of markdown. Feel free to edit and correct what I or others have written. Please take things I've said in Riverchat or elsewhere and add them to Riverpedia, if you want. I will review your work before it goes public.
Notes about the archives
All entries written upon the wiki's creation (August 20) were written by Rivers Cuomo himself. After opening the wiki to fan contributions, entries could be written by fans, but required approval by Cuomo. Instead of containing the entirety of Riverpedia on each day, each archive page contains only articles that have been updated since the previous archived day.