{"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-1lo9e8t8","versions":[{"created_at":"2026-06-13T14:35:23Z","element_count":84,"note":"5軸GA polish 46->98 by M5 (autonomous)","saved_by":"mcp","sha256":"4e99d6bc8b81f86d05a77c35a90196bfca7700601770f0307b8c291071ab61b8","version":3},{"created_at":"2026-06-13T14:21:54Z","element_count":90,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"b8d75a65db7874a26fb22e22713f911060e23e04daf920d9b9d4d6b5a5deda2e","version":2},{"created_at":"2026-06-13T14:21:53Z","element_count":90,"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}]}