# Colosseum: Auditing Collusion in Cooperative Multi-Agent Systems

**Source:** https://arxiv.org/abs/2602.15198  
**Authors or institution:** Mason Nakamura, Abhinav Kumar, Saswat Das, Sahar Abdelnabi, Saaduddin Mahmud, Ferdinando Fioretto, Shlomo Zilberstein, Eugene Bagdasarian  
**Publication date:** 2026-02-16  
**Publication status:** arXiv preprint  
**Evidence level:** Emerging evidence  
**Date last reviewed in UTC:** 2026-06-26T00:00:00Z

## Direct findings or source content

Auditing agent communication and action for collusive behavior is an active research direction.

## Cognivirus interpretation

For Cognivirus.com, this source is used to examine risk at the level of adaptive systems, component compositions, evaluator boundaries, and behavioral persistence. The site interpretation is narrower than the source when the source is experimental, and more explicitly qualified when the source is architectural or programmatic.

## Limits

Preprint; artificial settings and measured regret may not map directly to every deployment. That collusion effects will be large in ordinary production systems.

## Source handling

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