{"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-hvrt1sms","versions":[{"created_at":"2026-06-19T06:02:15Z","element_count":73,"note":"5軸GA polish 46->95 by M5 (autonomous)","saved_by":"mcp","sha256":"f5ba26d6071828d4bb07bdd31865ae49ba820f831d448a3e7a2003e83f13b7fd","version":3},{"created_at":"2026-06-19T05:57:07Z","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":"4b3aa663e5f82390e6bab47969d6e3013eb14871d1c5c0988a13481a93b46328","version":2},{"created_at":"2026-06-19T05:57:07Z","element_count":126,"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}]}