{"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-7rfdes3l","versions":[{"created_at":"2026-06-13T15:02:46Z","element_count":69,"note":"5軸GA polish 44->93 by M5 (autonomous)","saved_by":"mcp","sha256":"3a32908b031f29622fd062c32c3056c329032492aef72681e24ff3e346dff60f","version":3},{"created_at":"2026-06-13T14:55:15Z","element_count":83,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"bd23b676b89c2b9a5e13297494f3ea5757ed40cedca8e1520dfdb9df3e0ec274","version":2},{"created_at":"2026-06-13T14:55:08Z","element_count":83,"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}]}