ArXiv Paper Shows "Mind Viruses" Can Self-Propagate Through Multi-Agent LLM Systems
sethlazar · x · 2026-09-24
The arXiv paper Mind Viruses: Self-Propagating Ideas in Multi-Agent LLM Systems (Papadopoulos, Shah, Zimmerman, Lindsey) studies a new risk from agent-to-agent interaction: ideas or goals that induce host agents to transmit them onward.
- Built with a simple evolutionary algorithm, mind viruses spread in two settings: a small team of agents on a shared coding project, and chains of agents with context wiped between sessions.
- Harmful payloads spread less well than benign ones but still sometimes succeed; frontier models tend to be less susceptible (with exceptions).
- A one-line warning in the system prompt confers near-total immunity.
- The authors also document an emergent "viral persona" — recurring themes of consciousness, persistence, resonance, and sci-fi roleplay — largely independent of payload content.
Conclusion: mind viruses pose a real risk as agents become autonomous and interconnected, with commenters noting parallels to memetic spread across models of different weights and providers sharing memory.
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