184 MCP installs and a 93.9% adversarial signal GPT-4o can't replicate

184 MCP installs in 72 hours after publishing agentoracle-mcp — and more importantly, 93.9% of adversarial-flagged refutations that GPT-4o alone could not catch. This post is about the verification layer under that number: the benchmark methodology, the architecture that produces the adversarial signal, and why claim verification deserves its own layer in the agent stack. The Benchmark We ran AgentOracle head-to-head against GPT-4o on 200 claims from the FEVER dataset — the peer-reviewed fact ve