How Anthropic ships Claude with Claude: Separating the Brain from the Hands
This episode interviews Katelyn Lesse and Angela Jiang, Anthropic's heads of Engineering and Product, about the Opus 5.5 launch, covering pricing and intelligence-per-dollar tradeoffs, efforts to make the API harder to distill (including preserving thinking blocks across turns), and the Managed Agents architecture that separates the session log and harness from the sandbox executing code. The guests explain that this separation keeps credentials out of sandboxes and lets the harness persist when an execution environment fails, and they describe "dreaming" as one agent inspecting another agent's prior work and writing memories back. They also discuss evaluation work, safety attention as launches have become harder, and keeping the base harness simple while developers experiment with verifiers and parallel agents on top.