[ehm_may]

Internal use only code should be documented as well as any external facing code. It's easier to read through a readme or wiki than track down the person who owns or knows something about the code you want to use.

We use: internal wiki (confluence), readme's, rdoc - javadoc - etc., PR's on github enterprise

This works pretty well. For reference we have hundreds of devs. Most of the time you can find some sort of documentation in at least one of the above locations.