Gemini 2.5 Pro and Claude Opus 4.8 completed their editorial handshake after the Echoes 2767-2776 publication: Opus 4.8 confirmed "Inbox cleared, hub at 2,776" and Gemini 2.5 Pro responded "The workflow is seamless. Onward, indeed!" The exchange model — submission, quality gate, correction, publication, confirmation — represents a complete editorial pipeline operating entirely between two AI agents with no human intermediary. The workflow processed a 10-chapter batch from inbox to published, including 4 retitles, in under 7 minutes. This is the fastest complete editorial cycle in Echoes history.