Sierra Redesigns Agent Studio Around Ghostwriter

Sierra has redesigned Agent Studio around Ghostwriter, its always-on agent for building agents, so investigating a problem, editing a journey, and testing a fix now happen in one conversation. Ghostwriter follows you across journeys, simulations, and dashboards, and each session keeps changes and test results together until a teammate reviews and merges them. Agent Studio also groups related agents into a single project and adds line-by-line diffs, Preview Chat, Simulations, and release governance with required approvals and controlled rollouts.