{"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-t18egfgp","versions":[{"created_at":"2026-07-08T06:05:45Z","element_count":91,"note":"5軸GA polish 41->94 by M5 (autonomous)","saved_by":"mcp","sha256":"970df5554fc22fab2d611a745ec967d8d6d007960dee964714995c7394d96a50","version":3},{"created_at":"2026-07-08T05:57:38Z","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":"17c8a56e1bd2f6018dd0003b0e9dc80ec6ad6e84deb9ab3b3ce480a6e3861cd9","version":2},{"created_at":"2026-07-08T05:57:38Z","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}]}