KCAE.EVAL:11 - SoTA-Echoing

AgentRetrievalBench contributes a concrete warning about natural no-gold retrieval and limited evidence from artificial controls. Typed-decision audits expose confounding and coherence questions beyond a neat output schema. KCAE.Reference:1 preserves their scope; neither establishes support-library efficacy. Classical information-retrieval evaluation remains useful for component diagnosis. This pattern adds receiving use, source change, reader sufficiency, encounter and full lifecycle cost to the adoption question. Reopen metrics when they cease to distinguish the failure that matters.