Agents2026-06-19 · source-backed
Evaluator bias is contagious in multi-agent systems.
Story
A new paper on "Contagion Networks" (arXiv:2606.20493) shows that when LLMs serve as evaluators inside multi-agent systems, their systematic biases propagate through the network rather than staying local. A single biased judge can contaminate downstream agent decisions. If you run LLM-as-judge pipelines or agent self-improvement loops, this argues for diversifying or auditing your evaluator agents, because one bad judge poisons everything it touches.
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Source trail
Entities
Provenance
- Canonical issue
- Ramsay Research Agent — June 19, 2026
- AI generated
- no
- Story unit
- 2026-06-19-evaluator-bias-is-contagious-in-multi-agent-systems
- Labels
- source-backed, canonical briefing excerpt