CumulusCI is a command line tool belt and set of reusable Python classes useful in the development and release process of building a Salesforce Managed Package application.

• Out of the box, CumulusCI provides a complete best practice development and release process based on the processes used by Salesforce.org to build and release managed packages to thousands of users
• Flexible and pluggable system for running tasks (single actions) and flows (sequences of tasks)
• OAuth based org keychain allowing easy connection to Salesforce orgs and stored in local files using AES encryption

If you just want a quick intro, watch this screencast demo of using CumulusCI to configure a Salesforce project from a GitHub repository: https://asciinema.org/a/91555

The master branch now contains CumulusCI 2 which is not backwards compatible with the previous CumulusCI that was based on Ant. If you are using the Ant targets, please switch to using the legacy-1.0 branch of the repository which contains the Ant based version. Or, consider upgrading to CumulusCI 2.