Prompt optimizers can collapse a multi-agent pipeline to zero usable output

A prompt in a multi-agent pipeline does two jobs: elicit content and define the routing and termination protocol. A prompt optimizer edits both, because to it they are just text, and the result is not a worse answer but a broken one.

$ 2026.09.16 · 4 min read · #prompt engineering

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Prompt optimizers can collapse a multi-agent pipeline to zero usable output

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