{"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-moyy6gnz","versions":[{"created_at":"2026-06-13T16:03:55Z","element_count":72,"note":"5軸GA polish 43->95 by M5 (autonomous)","saved_by":"mcp","sha256":"c376e5ee6a155c767c77387d66a7911b9f11a05569e4ba0a0dc873d7feb6d284","version":3},{"created_at":"2026-06-13T15:55:53Z","element_count":88,"note":"loop3: 設計時延床 80.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"3a91b9e37f314a53c5f2999d1e3a868b7d5a616055accc405905207d84a4921f","version":2},{"created_at":"2026-06-13T15:55:53Z","element_count":88,"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}]}