{"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-tzybokh8","versions":[{"created_at":"2026-07-23T19:40:58Z","element_count":134,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"ab9a94947362d1d5d59953750e70e311f2357a60f34f747fd11960c6424b33c2","version":2},{"created_at":"2026-07-23T19:40:51Z","element_count":134,"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}]}