Sierra Redefines Agent Studio Around Ghostwriter
Sierra has redesigned Agent Studio around Ghostwriter, allowing teams to investigate agent performance, edit journeys, run simulations, and test fixes in one conversational session. Sessions retain related evidence, changes, and test results for review and merging, while line-by-line comparisons, Preview Chat, Simulations, required approvals, and controlled rollouts support release governance. Sierra describes Ghostwriter as an always-on agent for building and improving agents; these capabilities are currently reported by the vendor alone.
The update consolidates agent troubleshooting, editing, testing, review, and release controls into a single conversational workflow, but its effectiveness remains unverified beyond Sierra’s own claims.
A year ago, almost every piece of code was written by engineers. Today, you’d be hard pressed to find a tech company that writes over five percent of its code by hand. Agent building is following the same path, from code to clicks to prompts.
Ghostwriter is our agent for building agents — an always-on teammate that not only helps you build but also understands how agents are performing, suggests improvements in Slack and Teams, and pushes whatever you approve live.
But even the best teammates need a shared place to work — and that’s Agent Studio, where you can investigate problems, work on improvements, test changes, and decide what ships. Until today, that involved navigating between the different parts of Agent Studio needed to edit journeys, run simulations, and review performance.
We’ve now redesigned Agent Studio around Ghostwriter, so you can go from asking why resolution rates dropped to examining the conversations, updating a journey, and testing the fix — all in one conversation. The evidence, changes, and test results stay together for your team to review before anything goes live.