{"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-kewriversidehouse-10syubwd","versions":[{"created_at":"2026-07-31T07:01:35Z","element_count":119,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"13868bd14a7e5e4c238ee6c200be5d65d634eed37a4468a70926d6c964a0976b","version":2},{"created_at":"2026-07-31T07:01:34Z","element_count":119,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}