Bolt-JS now supports Custom Steps! That's right, your trusty Bolt app now let's you expose Custom Steps in Bolt, allowing you to provide steps for use in Workflow Builder.
You can now use the new function() method to register handlers for the function_executed event. Check out our API docs on the topic to get started.
Full Changelog: https://github.com/slackapi/bolt-js/compare/@slack/bolt@3.20.0...@slack/bolt@3.21.0
Fetched April 3, 2026