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Multi-Agents: What's Actually Working

Walden Yan · 22 Apr 2026

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  1. Prompt engineering encourages gimmicky techniques like “you’re a senior software engineer” or “think for longer.” Context engineering is more durable
  2. These are exciting but they all share a property most real software doesn't: a simple, verifiable success criterion. Real software requires a system that scales human taste and decision-making
  3. Interestingly, we found this technique to work best when the coding and review agents do not share any context beforehand.
  4. We think the unstructured-swarm approach, arbitrary networks of agents negotiating with each other, is mostly a distraction.
  5. multi-agent systems work best today when writes stay single-threaded and the additional agents contribute intelligence rather than actions
  6. The open problems are all communication problems.

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