[TxMt] rmate custom commands?

Hello, I'm interested in sending custom commands to the rmate session in the server. I think I can manage some ruby, but C is another story. In particular, I'm interested in sending commands to execute: for example I would want to be over a class name and with a key combination send something like "run\r\n"+ "/find/and/send/to/rmate MyClass", so rmate will run this as an OS command. I can manage getting rmate in the server to understand and run the command, but I don't know how to make Textmate to send such a command. Is this something that can be done today?

Thanks! Jose