{"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-s36ul8df","versions":[{"created_at":"2026-07-25T12:01:34Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"62f3f2765b9adb82f069e934ea09d4091cae86c9db18854d9be779a97d92ada5","version":2},{"created_at":"2026-07-25T12:01:30Z","element_count":105,"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}]}