{"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-khptg36e","versions":[{"created_at":"2026-06-13T19:45:43Z","element_count":85,"note":"5軸GA polish 44->95 by M5 (autonomous)","saved_by":"mcp","sha256":"b081d075d2ab30598ae5657fc91a00b8fc5bc5520dde75985ac0810624b85cab","version":3},{"created_at":"2026-06-13T19:40:42Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"3570ae04e23dd20460d22b344dcba5b9120e13d31137ac6b3cd7fce5639482f2","version":2},{"created_at":"2026-06-13T19:40:41Z","element_count":119,"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}]}