{"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-regenthouse-98lvxlez","versions":[{"created_at":"2026-07-05T19:39:57Z","element_count":82,"note":"5軸GA polish 38->91 by M5 (autonomous)","saved_by":"mcp","sha256":"ef83ac0f27de3fbb856e468a18f501bc16f6fe1dcff3573d53dea484f6f6d419","version":3},{"created_at":"2026-07-05T19:33:12Z","element_count":101,"note":"loop3: 設計時延床 45.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"34bcd80984f52af90135c1c85d63574bd12a9cab618e27a3f0f7ed7bc20165f9","version":2},{"created_at":"2026-07-05T19:33:12Z","element_count":101,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}