Swimlane · Diagram Design
Four actors, seven steps, three handoffs. The step each person owns lives in their lane — arrows crossing lanes are where coordination happens.
THE HEADLINE
Every other step lives inside one person's head. The Editor→CI/CD handoff is where automation takes over and humans lose the ability to undo — hence coral.
The Reviewer lane has one step; CI/CD has two. Lanes don't need to match — they exist to make ownership unambiguous.