It would be nice to have support for using AND/OR/NOT expressions on the command line for services that support searches or other commands using them. This would require defining some sort of grammar to parse the expressions including using argparse to parse the args as well as figuring out what data structure to use to pass the expression down to the service level where it would have to be properly interpreted into a query to send to the service.

In terms of command line syntax, the POSIX compliant versions of the boolean expr syntax 'find' supports probably are best.