
Inside the Claude Agents SDK: Lessons from the AI Engineer Summit
Executive Summary At the AI Engineer Code Summit in New York City, Anthropic shared key insights into the Claude Agents SDK that reshape how effective AI agents are built in practice. By exposing the same agent harness that powers Claude Code , the SDK highlights a shift away from prompt-centric approaches toward more structured, reliable agent architectures. These learnings reflect a growing challenge many teams are encountering in practice: increasing model capability and code generation speed without losing control, auditability, or reliability. This post distills the core technical takeaways and explains why the infrastructure around the model—the agent harness—is just as critical as the model itself. The full workshop recording from the summit is available on YouTube . In this blog post, we dive into our main learnings.































