As mentioned previously, CouchDBKit stores map/reduce functions on the local filesystem. An undocumented feature in the couchdbkit.designer module is the presence & functionality of the .couchappignore… thankfully the programmer left some comments.

# A .couchappignore file is a json file containing a 
# list of regexps for things to skip 

I assume this functions similar to .gitignore or SVN:ignore