AGENTIC_TEXT_NOT_IN_CANVAS
An agent reads the DOM and the accessibility tree. Text painted into a canvas exists only as pixels, so a canvas-rendered interface is completely opaque to it - and to screen readers, and to search engines.
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.