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## Why Guardian V2 previously skipped optional Decisions comparisons in conversation mode as unsupported evidence. ## What changed - Start comparisons from the prepared conversation input, including retained history or rebuilt evidence after a history reset. - Extract the classifier rubric and preserve evidence message roles, content order, and boundaries. Omit retained reasoning and compaction items while continuing to reject other unsupported evidence. - Measure baseline sampling through the usable score, before history draining and commit, and report skipped comparisons when preparation fails or the request is superseded. ## Testing Extend coverage to both classifier modes for comparison disagreements, failures, and disabled or uninitialized comparisons without changing baseline scores. Verify conversation evidence across history reuse and resets, malformed input rejection, and budget failures before either backend sends a request. GitOrigin-RevId: ce32cf876d15d3b82e0b83ac02c33447e7724a51