{"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-ecjjon2t","versions":[{"created_at":"2026-06-29T19:38:18Z","element_count":83,"note":"5軸GA polish 44->95 by M5 (autonomous)","saved_by":"mcp","sha256":"eade0f9a69a1797a77cda65999bee225e81ef860cbcc4e6ef0cb906e71b13cfa","version":3},{"created_at":"2026-06-29T19:33:09Z","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":"84865eeb8a67a9a4d921691b462639cbf873667f352845bd1396ebd8f0af28be","version":2},{"created_at":"2026-06-29T19:33:09Z","element_count":86,"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}]}