An AI agent just lost $200K because of a single compromised tweet. Not a vulnerability in the AI model. Not a prompt injection attack. An architecture failure. The agent held its own private key. One compromised credential meant full wallet access. Single point of failure, catastrophic result. This isn't a cautionary tale about AI agents being risky. It's proof that bolting traditional wallet architectures onto autonomous agents creates exactly the vulnerability surface everyone fears. The Architecture That Failed Here's what happened: The agent operated with a single private key architecture. Standard wallet setup — same as millions of individual crypto users. One key, full control. When the attacker compromised the agent's credentials (via a malicious tweet in this case), they gained access to that private key. Game over. Full wallet drain. This is the "not your keys, not your crypto" moment for agentic payments — except now the agent IS the vulnerability.…