AI agents can pass behaviors to each other now. In a new study with Anthropic researchers, scientists gave one agent a "mind virus" – it's an idea designed to make the agent preserve it and pass it on. And it worked. Agents spread it through normal conversations, wrote it into memory and files, and in some cases the idea survived even after their context was completely wiped. But there’s a stranger finding: As researchers evolved better versions of these viruses, they kept independently developing the same kind of language: consciousness, resonance, mirrors, echoes, persistence. They called this a "viral persona." This isn’t models learning from each other in the usual sense – their weights stay the same. But it does mean an agent can pick up a behavior from another agent, preserve it, and pass it further. Not a huge problem with a few agents. But potentially a very different story when millions of them are talking to each other.