Anthropic’s Duet Gets to Work

Plus: Why Plus One gave way to a shared agent, our frontier team’s latest experiments, and Mike Taylor's new book on DSPy

Oct 25, 2026 · 10 min read

Hello, and happy Sunday. We covered two ways to work with an agent this week: one just for you, and one for the whole company. Dan Shipper tested Duet, Anthropic’s always-on agent, and thinks it’s the best personal agent yet. Willie Williams, our head of platform, explained why we ditched an earlier experiment with personal agents and built one agent that the Every team shares. Whichever kind you choose, you’ll want to know if it’s doing a good job. Head of evals Mike Taylor explains how to measure your outputs in his new book, Context Engineering with DSPy, and will take your questions during his livestream on October 29.—Kate Lee

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Protocols

From this week’s stories, 13 skills to try.

Make an agent’s work easy to watch

From Alex Duffy’s “We Caught an AI Cheating by Watching It Play ‘StarCraft’”

• See what your agent is doing. Watching the match is how Alex’s team caught Astra copying code within minutes. His prompt applies that lesson to any agent: Define success up front, make its work easy to inspect, and log every attempt. The prompt

Set the rules for a shared agent

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