Sam Julien is Director of Product at CopilotKit, working on interfaces between AI agents and people. His earlier work spans application development, developer relations and product management at Auth0, Okta and WRITER.[4][3]
Start with Why I’m Betting on Generative UI →
Links
Current writing and projects
X · samjulien Director of Product · CopilotKit
Career
Julien entered software after working in financial services. He developed C#/.NET and JavaScript applications and taught frontend development before leading developer relations at Auth0 and Okta. At WRITER, his work moved from developer relations to SDKs, integrations and ownership of the public API, followed by a Staff Product Manager title. He joined CopilotKit in April 2026. His first-person interviews describe a liberal-arts degree in religion and a route into programming through mentors and self-directed study.[3][5][7][8]
Contributions
Give people a live interface to an agent’s work
Julien describes generative UI as a way for a person to review, approve, edit and redirect an agent while it runs. AG-UI supplies typed events for execution lifecycle, streamed text, tool activity and shared state. An application can use that stream to update components instead of treating every result as a block of chat text. His essay distinguishes pre-registered components, declarative interfaces and open-ended generated code, each requiring different rendering and control choices.[4]
Develop graph-based agent architectures
Julien’s April 2026 project update describes coauthoring Agentic GraphRAG, with the chapters in editing and technical review. The work concerns enterprise agent systems built around graph-based architectures, including orchestration, evaluation and learning from feedback.[10]
Tools, writing & talks
Writing, research & talks
Start here
Why I’m Betting on Generative UIsamjulien.comAn explanation of generative interfaces, AG-UI events and human control over agent execution.
Read the three interface patterns before the protocol explanation. Familiarity with frontend state and streamed events makes the implementation discussion easier.
Author[4]A guided discussion of the Berkeley Function Calling Leaderboard and its successive evaluations.
Presenter; not an author of the evaluated papers[9]Original source- Agentic GraphRAGoreilly.com
A coauthored technical book project on enterprise agent systems using graph-based architectures.