Johan Bagger updated the Slack Event Subscriptions URL documentation in the slackapi/bolt-js repository, focusing on improving developer experience and reliability for Slack apps. He clarified the required request URL path for event subscriptions, addressing common misconfigurations and reducing onboarding friction for bolt-js users. Working primarily with Markdown and leveraging his documentation skills, Johan delivered clearer guidance by revising the event-listening.md file, directly linking the update to a tracked issue. While the scope was limited to documentation and did not involve bug fixes or code changes, the work provided targeted, actionable improvements for developers integrating with Slack’s event system.