Eoghan Murphy enhanced the intercom/Intercom-OpenAPI repository by expanding the Messaging API documentation to support CC, BCC, and multi-recipient message composition. Focusing on API expressiveness, Eoghan refactored the To field in the OpenAPI Specification, enabling messages to be addressed to multiple users and leads. This update, implemented in YAML, aligns with business goals to improve integration flexibility and developer experience. While no bugs were fixed during this period, the work delivered a deeper, more flexible API surface for clients composing and routing messages. Eoghan’s contribution demonstrates depth in API documentation and OpenAPI Specification, with careful attention to integration needs.