{"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-yhxrxtbf","versions":[{"created_at":"2026-07-13T19:29:27Z","element_count":73,"note":"5軸GA polish 41->92 by M5 (autonomous)","saved_by":"mcp","sha256":"ca25aa08bdeb3543b1c3c84afd29b9d5ed0c1faf35f2b681f1be2fa5e91e55a2","version":3},{"created_at":"2026-07-13T19:26:20Z","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":"9e9a4328db7663c357e3f9f68c5d6954a83b7f32676c78bbae54abfe837d6359","version":2},{"created_at":"2026-07-13T19:26:20Z","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}]}