{"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-txra30uh","versions":[{"created_at":"2026-06-19T06:02:36Z","element_count":69,"note":"5軸GA polish 44->95 by M5 (autonomous)","saved_by":"mcp","sha256":"05e25ccf0bd0a09526f112cbd124f974f8750160004bb0a657c327bf78c9b048","version":3},{"created_at":"2026-06-19T05:56:01Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"78b3706b4b7df2c7a994f6bc8c3e27fd2443ba35fc24e1f59d23495404d7352a","version":2},{"created_at":"2026-06-19T05:55:59Z","element_count":126,"note":"言葉から生成: LDK+主寝室+子供室+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}