{"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-jemwgp6i","versions":[{"created_at":"2026-06-13T17:09:22Z","element_count":52,"note":"5軸GA polish 42->90 by M5 (autonomous)","saved_by":"mcp","sha256":"5454bb102632fd3db1f6897d6bbb07ed51feb643590bf76c68c2d163fc3a66cd","version":3},{"created_at":"2026-06-13T16:59:17Z","element_count":86,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"a7ccde44339d6b1a2bb0eaa4c6aa9fe3fbd01a032d857dc57ad9471be974eca3","version":2},{"created_at":"2026-06-13T16:59:15Z","element_count":86,"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}]}