{"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-o4ytb6em","versions":[{"created_at":"2026-06-13T20:14:46Z","element_count":90,"note":"5軸GA polish 44->95 by M5 (autonomous)","saved_by":"mcp","sha256":"cfd850fc4242d139c91c5d176709a9a2c006695a7ce7b565cf1ea13e25e0c2aa","version":3},{"created_at":"2026-06-13T20:03:07Z","element_count":101,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"3c9465dbe04ce3bab687447c334021d694f91e90c850a2f3dfd06a0a7e324044","version":2},{"created_at":"2026-06-13T20:03:05Z","element_count":101,"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}]}