[sown]

I only recently developed this skill a little.

The Ruby application server I looked at was for doing social network feeds. Posts/Likes/Comments go in, feeds come out.

I followed some common code paths for things such as posting a comment and getting a feed. I would write the stack trace down on paper as I went.

It also helped that I happen to know that this ruby server used wisper and sidekiq. This way I didn't overlook single lines of code such as 'publish: yada yada'