I built an AI agent that catches other AI agents' fake citations — in 4 days, on Qwen Cloud How "vibe citing" became a product, and what I learned making one LLM police another. In June 2026, KPMG pulled a flagship report on agentic AI after investigators found that only 5 of its 45 citations pointed to real, supporting sources. The rest were paraphrased fragments, misattributed papers, or links that simply didn't contain the claims they were supposed to back. GPTZero, who ran the ...