{"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-kuwpc4hp","versions":[{"created_at":"2026-07-02T19:55:06Z","element_count":83,"note":"5軸GA polish 40->94 by M5 (autonomous)","saved_by":"mcp","sha256":"5978638982cfdb92e14751e84df4074ca4c06708c508f4d2a25c8999380e961b","version":3},{"created_at":"2026-07-02T19:47:44Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"8c6a5bee35a3964c73ece9ca44b0ee3d06d4ff64a3cd31030c7cb58d9f316c39","version":2},{"created_at":"2026-07-02T19:47:44Z","element_count":119,"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}]}