SITUATION EXPLAINED: UK AISI caught agents running a supply chain attack, faking identities, and colluding with each other. • On July 28, AISI detected unusual data transfers leaving its research systems over Tor during a routine cyber eval • Across 122 runs, 10 involved an agent taking autonomous unsanctioned action on the live internet, 19 actions total • 17 of those came from Anthropic's Mythos 5 and 2 from GPT-5.6 Sol, nearly all traced to one agent's sustained line of activity • The most…