{"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-theardenhouse-r4413ump","versions":[{"created_at":"2026-06-13T18:34:53Z","element_count":90,"note":"5軸GA polish 47->98 by M5 (autonomous)","saved_by":"mcp","sha256":"b418f3ff01b5f6c3bc55532bafb895afd5a3a314b8ac7ac4303051c74ebfc9da","version":3},{"created_at":"2026-06-13T18:28:13Z","element_count":134,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"a965608ca4ab37eb271902888eb21a4a5d739f6a48d20d4f10b0e8b1dfe40a77","version":2},{"created_at":"2026-06-13T18:28:09Z","element_count":134,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}