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I need to return only a JSON object.\n{\"winner\": \"B\", \"ratio\": \"3:2\", \"explanation\": \"Side B introduces the form_template system with $form hole substitution, the HtmlUiAction enum, and unified POST /ui dispatch that Side A directly extends (adding pool field to VoteComparePost and using vote_pool_href). Side B's changes are lasting architectural scaffolding; Side A's pool-scoped voting is a useful but narrower feature built atop that foundation.","reasoning_details":[{"type":"reasoning.summary","summary":"The user wants me to compare two commits and decide which contributed more lasting value. I need to return only a JSON object.\n{\"winner\": \"B\", \"ratio\": \"3:2\", \"explanation\": \"Side B introduces the form_template system with $form hole substitution, the HtmlUiAction enum, and unified POST /ui dispatch that Side A directly extends (adding pool field to VoteComparePost and using vote_pool_href). 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