GEO_CHATGPT_USER_ALLOWED
If robots.txt disallows ChatGPT-User, ChatGPT cannot fetch this page when a user explicitly asks it to browse the URL.
Impact is importance multiplied by the confidence tier’s weight — SPECIFICATION 1.0, RESEARCH 0.7, EMERGING 0.3, EXPERIMENTAL 0.1. Two rules backed by the same class of evidence therefore always carry the same weight, which is what makes the score reproducible rather than hand-tuned.