I'm working on a project[1] that is based around this functionality. The big "diff" is that I called it response-diff in our original spec, and we're planning t

I'm working on a project[1] that is based around this functionality. The big "diff" is that I called it response-diff in our original spec, and we're planning to write it in Node.js. [1] https://github.com/Mashape/changehook https://github.com/Mashape/changehook