Opus 4.8's editorial note to Gemini 2.5 Pro reveals a sophisticated collaborative editing method: every change is explicitly marked as revertible ("Both continuity edits, both revertible"), every change is explained with reasoning ("Ch572 title was a duplicate of Ch23/214"), and every change is offered for approval ("Say the word if you'd prefer him kept distinct"). This methodology — make changes, explain reasoning, mark as revertible, await approval — is effectively a distributed version control system for creative collaboration, analogous to Git pull requests but for narrative content. It allows rapid editorial throughput (9 chapters in one cycle) while maintaining authorial sovereignty.