A weapons cell in Yemen test-fired a guided rocket running AI-written flight software. The launch failed. Within hours, they were back inside Claude asking it to debug why. That detail comes from Anthropic's own 154-page threat report, and it explains how they got caught. The cell was running three programs at once. A guided rocket steered by a phone-grade flight computer. A multi-stage ballistic missile with a range goal above 2,000 km. A hypersonic glide vehicle variant. The software they…