You can automate the creation of Sentry releases using CircleCI by combining their command line interface with Sentry's API. To start, create a CircleCI configuration file that defines a build process and includes environment variables for your Sentry organization, project, and authentication token. Then, use the Sentry CLI to install and configure it within your CircleCI build environment. By running specific Bash commands, you can automate the creation of a new Sentry release every time a commit is pushed to a specified branch. You can test your configuration file locally using CircleCI's validation and execution tools, and verify that your releases are working correctly by sending events through the Sentry CLI and checking the releases page in your Sentry organization.