{"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-kql1zwi2","versions":[{"created_at":"2026-06-17T06:03:08Z","element_count":71,"note":"5軸GA polish 44->93 by M5 (autonomous)","saved_by":"mcp","sha256":"cb2a17d3ed9d3bd420b70a8211c41b30a2d79941c8583fd1b9fdf0ff22643290","version":3},{"created_at":"2026-06-17T05:56:03Z","element_count":86,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"b3c3edea479ab6db2a0a05a33d74fce939e0ddabd67fcc856d3e48948245f392","version":2},{"created_at":"2026-06-17T05:56:03Z","element_count":86,"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}]}