I wrote something similar after I moved our fleet to SSM because I didn't want yet another CLI app to memorize flags on. It's ruby based and runs in an interactive mode by default. It doesn't cover the whole set of `aws ssm` featureset but focuses just on things that are needed for debugging sort of tasks. Leaving it here incase it's useful to anyone else: https://github.com/ajbdev/ruby-ssm-ops