{"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-5bs7zp5w","versions":[{"created_at":"2026-06-13T19:45:33Z","element_count":84,"note":"5軸GA polish 47->98 by M5 (autonomous)","saved_by":"mcp","sha256":"8c088d90c56033c741012ae3200265f6a7bd9e273c5b16f8d4a9e191a657db0a","version":3},{"created_at":"2026-06-13T19:39:17Z","element_count":107,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"afe1198be3859be2bda788c8a1e7af7cd0fc2cf0519a17ddf8ad0526ee66d6de","version":2},{"created_at":"2026-06-13T19:39:17Z","element_count":107,"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}]}