Chuck (shell?) TCP protocol specifications

[dalfa]

Hi! I'm struggling in finding any information about the data (and format) exchanged on port 8888. using WireShark I saw that, when using Chuck from the command line, all the data (the .ck file content) is sent to the sever through this port (as well as its filename).
I'd like to know more, as my objective would be to compile stuff on the fly - possibly from any language (supporting just TCP sockets).

Code reading would be my last option, although I'm pretty much sure these information must be somewhere!

Any help is appreciated! Thanks!