{"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-voo50bah","versions":[{"created_at":"2026-07-05T06:02:57Z","element_count":90,"note":"5軸GA polish 45->95 by M5 (autonomous)","saved_by":"mcp","sha256":"4962d74f166e3bf1f9c253ccbd935d4e4ee9aa96d3f3acc8cba4cb5dca98f345","version":3},{"created_at":"2026-07-05T05:57:47Z","element_count":82,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"2a56c346d53302a2069bafbb063f7d0c32e27a55f2eb29e226ab4f1a32b4e8ca","version":2},{"created_at":"2026-07-05T05:57:47Z","element_count":82,"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}]}