{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-house-0uo4l9nl","versions":[{"created_at":"2026-06-22T20:03:27Z","element_count":68,"note":"5軸GA polish 44->95 by M5 (autonomous)","saved_by":"mcp","sha256":"3223cf5e01c541e0662b1b9ad929ff59bb04335ba96ae1ea21fa207056aa4fc0","version":3},{"created_at":"2026-06-22T19:54:49Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"08345a65163d365ca8a9096823a76f66bbfd9e3d3abf10defd9fcb3e60a9d52f","version":2},{"created_at":"2026-06-22T19:54:46Z","element_count":105,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}