{"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-1vtvay75","versions":[{"created_at":"2026-07-03T06:03:15Z","element_count":89,"note":"5軸GA polish 46->97 by M5 (autonomous)","saved_by":"mcp","sha256":"f63d363fc58b42f42c29e675b243452e57e69b0a2adcc027df88f2c122b74f8e","version":3},{"created_at":"2026-07-03T05:52:05Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"5fb3e2b553f6a0801685caceb2c78c11507cb8193f21dfea73514dd62f33a666","version":2},{"created_at":"2026-07-03T05:52:05Z","element_count":126,"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}]}