{"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-petterhouse-hl81hxs9","versions":[{"created_at":"2026-06-30T22:29:23Z","element_count":88,"note":"5軸GA polish 38->92 by M5 (autonomous)","saved_by":"mcp","sha256":"4dbdc87f950b4d7f214db9b91480b69fbef1c69145c11751c77d15eea5a70563","version":3},{"created_at":"2026-06-30T22:22:45Z","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":"6d35d1e5a4a0f1ad04a77a58a0ab811e8ced310ae8149f1e2dd6c24c699289b9","version":2},{"created_at":"2026-06-30T22:22:45Z","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}]}