It can be hard to figure out how to exactly add Fraytools content at all. Most people who are interested in making content have little to no experience in coding. This page is for adding helpful information about how exactly to create custom content and to prevent future content creators from making mistakes that others have made.
Official Help[]
To start off, Team Fray has created some helpful documents themselves to follow. They don't cover absolutely everything, but they're a good starting point to figure out the basics.
Fraytools Download and Setup (Windows, Mac, Linux)
Custom Content Tutorial (Assists, Stages, and Music only for now)