- escalation: EscalationDecision.reason is now Literal["empty_text", "low_confidence"] (parity with kind; ty catches a bad label at call sites). - processor: nest the decision handling so the hop branch is reached via an explicit else under `if decision is not None` — exhaustive over the Literal kind, no None-attribute risk. - tests: add the "OCR processor unregistered (not just disabled) → None" quadrant, locking in absent != suppressed. Deck #324. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>