{"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-32nmb3mw","versions":[{"created_at":"2026-07-13T09:54:02Z","element_count":73,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"7d7a99db2375ec134d1998386ef9fb04356e674e1464dfaa19952e7e8eb0598a","version":3},{"created_at":"2026-07-13T09:36:22Z","element_count":89,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"d70b7cccdfb9cbbd5d349802bac910c7221d181e004aca1ba32fb65ffa14c277","version":2},{"created_at":"2026-07-13T09:36:22Z","element_count":89,"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}]}