{"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-0mb11io4","versions":[{"created_at":"2026-06-13T20:14:40Z","element_count":83,"note":"5軸GA polish 41->94 by M5 (autonomous)","saved_by":"mcp","sha256":"577079a6568692bb7c6dd37111612468459e8bdc8b919d8dde5285f46836bb52","version":3},{"created_at":"2026-06-13T19:56:04Z","element_count":82,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"15ce89dc3103bb0839228873e683b44482e6dbbc7a09263915313f954ed00221","version":2},{"created_at":"2026-06-13T19:56:02Z","element_count":82,"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}]}