Cobra is a library providing a simple interface to create powerful modern CLI interfaces similar to git amp; go tools. Cobra is also an application that will generate your application scaffolding to rapidly develop a Cobra-based application. Cobra provides: - Easy subcommand-based CLIs: app server, app fetch, etc. - Fully POSIX-compliant flags - Nested subcommands - Global, local and cascading flags - Easy generation of applications amp; commands with cobra init appname amp; cobra add cmdname - Intelligent suggestions - Automatic help generation for commands and flags - Automatic help flag recognition of -h, --help, etc. - Automatically generated bash autocomplete for your application - Automatically generated man pages for your application - Command aliases so you can change things without breaking them - The flexibility to define your own help, usage, etc. - Optional tight integration with viper for 12-factor apps