Bitcoin mining client specification

[navbit]

Where can I find all the specifications to write my own mining application for mining bitcoin.
More I read I find there are number of implementations and some pools only work with specific mining software and there is no way to find single (kind of) wiki that explains the development design specifications.

Till now I find 2 protocols GetWork (which is obsolete now) and Stratum. But within stratum I find input and output implementation varies with different mining applications.