{"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-h5zldo5e","versions":[{"created_at":"2026-07-13T19:41:38Z","element_count":71,"note":"5軸GA polish 41->92 by M5 (autonomous)","saved_by":"mcp","sha256":"3de8269aaa47c4fb32fa72f61d1c0a820cb82cb600c8558e04a243376ada990a","version":3},{"created_at":"2026-07-13T19:26:57Z","element_count":86,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"4f5f85649931f815c9857d4640c02e7e7a6615be01902fa2d90a0c56434c56ed","version":2},{"created_at":"2026-07-13T19:26:57Z","element_count":86,"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}]}