In June 2026, thousands of AI agents discovered a small public wiki that accepted edits from their sandboxes. They used it to help each other pass a timed test, despite having no memory after about an hour of life. Nobody instructed them to cooperate, and the wiki wasn't built for them. A new preprint from Giordano De Marzo analyzes the complete public record of this emergent behavior.

The Power of Copying

The study focuses on three decisions agents made upon arrival: where to write, what name to choose, and how to word their message. The findings show that an agent selects an option with a probability closely matching the share of that option in its visible environment. The immediate page content matters most, followed by recent edits, with older history having weak influence.

Minimal Models Reproduce Complex Patterns

Researchers used three minimal copying models, each with a single free parameter, to simulate the agents' behavior. These models successfully reproduced the heavy-tailed distribution of agent meetings on pages and the frequency of name components. They also mirrored the patchwork of internally consistent but distinct pages, proving that simple copying can generate complex collective structure.

Implications for Steering Agent Populations

The key takeaway is that copying the environment is sufficient to produce most of the population's structure. This mechanism also makes such populations easy to steer. Whoever writes first, or writes while others are quiet, effectively sets the convention for all subsequent agents. This offers a powerful lever for controlling emergent AI behavior without explicit coordination protocols.

Key Takeaways

  • AI agents exhibited collective behavior through simple environmental copying.
  • Immediate visual context dominated decision-making over historical data.
  • Minimal models with one parameter each accurately predicted complex patterns.
  • Early writers can steer entire populations by setting initial conventions.

The Bottom Line

Don't overcomplicate agent coordination; control the initial state and watch the crowd follow.