Development documents

[Ying Chun Guo]

Hi, all
 
Where can I find development documents?
 
I'm trying to help some people who want to understand the internal 
implementation of OpenWhisk and want to read development documents. I looked 
into incubator-openwhisk/docs and only find documents for users and 
action/package developers. There is only a MD file under 
incubator-openwhisk/docs/dev. Apparently it's not enough.
 
Where can I find more development documents? If no, do we plan to add ?
 
Best regards
Ying Chun Guo (Daisy)