To Creation of Ashes, for 221 packet captures from the original Alpha-2 servers. Studying them is how this project learned what the client expects.
The original servers are gone, and what the client expects from a server was never written down anywhere. The only way left to learn it is to look at what the client once exchanged with those servers. Creation of Ashes recorded 24.6 MB of that traffic, one action at a time, sorted by what was done, and shared it with the project. Studying these captures allowed us to understand the packet structures the client expects and write our own compatible server logic from scratch.
The project's tests and research notes refer to these recordings as the reference for what the client expects. The server logic checked against them is the project's own.