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I need to return only a JSON object.\n{\n  \"winner\": \"A\",\n  \"ratio\": \"3:1\",\n  \"explanation\": \"Side A delivers a substantive algorithmic redesign of pair selection logic with bridge prioritization, isolate attachment rules, and zip-down refinement ordering, directly improving ranking quality and spanning-tree behavior. Side B provides a targeted reliability fix for OAuth handling and cloud-IP API blocking, but this is largely deployment-specific and less enduring than the core design change in A.","reasoning_details":[{"type":"reasoning.summary","summary":"The user wants me to compare two commits and decide which contributed more lasting value to the project. I need to return only a JSON object.\n{\n  \"winner\": \"A\",\n  \"ratio\": \"3:1\",\n  \"explanation\": \"Side A delivers a substantive algorithmic redesign of pair selection logic with bridge prioritization, isolate attachment rules, and zip-down refinement ordering, directly improving ranking quality and spanning-tree behavior. 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