{"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-1styjkzr","versions":[{"created_at":"2026-06-14T17:43:22Z","element_count":84,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"9496c1fc1f85298e8fea46234fe963997ec27ad59f426a3dba2397f3b4090814","version":3},{"created_at":"2026-06-14T17:35:48Z","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":"1145e45d7afc1fbf3cac117b20a1337486bbad7c2b981bc0c11142305782e989","version":2},{"created_at":"2026-06-14T17:35:48Z","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}]}