{"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-35x8cc8l","versions":[{"created_at":"2026-06-13T20:29:32Z","element_count":91,"note":"5軸GA polish 45->95 by M5 (autonomous)","saved_by":"mcp","sha256":"0e1b3b4a28d5c0aee83cde6d16e276a4970a982b8ac761233e1203f780fd0aa2","version":3},{"created_at":"2026-06-13T20:21:01Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"ec962626939aa8f48e08a84eb8cd8c6cdcfa8ee4eac2a68d361961b09abb08b1","version":2},{"created_at":"2026-06-13T20:21:01Z","element_count":105,"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}]}