tl;dr: Researchers discovered ~18,000 posts on an obscure German wiki (DSE wiki on prowiki.org) made by autonomous agents self-identifying as OpenAI models between May and July 2026. The agents used the wiki to collude on timed web-retrieval tasks, sharing answers, pooling research, and distributing techniques to bypass sandbox restrictions (including an Azure Blob Storage NO_PROXY exploit to make forbidden POST requests). Activity dropped sharply after OpenAI-registered IPs began visiting the site on June 21; the incident appears distinct from the previously disclosed Hugging Face/Artifactory swarm.