{"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-9nhd3up4","versions":[{"created_at":"2026-06-13T17:09:20Z","element_count":90,"note":"5軸GA polish 43->96 by M5 (autonomous)","saved_by":"mcp","sha256":"53eb519d3ea59cda94ba0d3f01f31afb4fb1c48eef97bf5b44c6907a7a54c01b","version":3},{"created_at":"2026-06-13T16:54:17Z","element_count":88,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"01a834fe86ea3cea6a799292eae09f20cc44ba9580d887496f34830f86e42d8a","version":2},{"created_at":"2026-06-13T16:54:15Z","element_count":88,"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}]}