Dan Attwood developed the Booking Rules Email: ICS Attachments feature for the Wunderbyte-GmbH/moodle-mod_booking repository, focusing on backend development and Moodle plugin customization using PHP. He implemented configurable options to include or omit ICS calendar attachments in booking rule emails, with logic to indicate whether an event was created or cancelled. The solution enhanced ICS file rendering for compatibility with Google Calendar and other clients, improving the reliability of calendar-based communications. Dan’s work provided per-rule control over attachment behavior, reduced user follow-ups, and ensured clear traceability from design through to commit, demonstrating depth in targeted feature delivery and integration.