DevDay 2025: Apps SDK, Agent Kit, MCP, Codex and why Prompting is More Important than Ever

In this episode of the Latent Space Podcast, Alessio and Swyx interview Sherwin Wu and Christina Cai from the OpenAI platform team at OpenAI Dev Day. They discuss the Apps SDK launch and OpenAI's mission to bring AGI benefits to the world through developers. The conversation covers the evolution from plugins to the Apps SDK, the adoption of the MCP protocol, and the shift towards empowering developers to own the user experience. They delve into AgentKit, a set of tools for building, deploying, and optimizing agents, and explore the various components like AgentBuilder, connector registry, and ChatKit. The discussion touches on the importance of human-in-the-loop interaction, automated prompt optimization, and the potential for interop between different agent builder implementations. They also discuss the Service Health Dashboard for monitoring API integration health and internal tools like Codex for code generation and review.