{"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-willowbrookbungalow-wd05mtjr","versions":[{"created_at":"2026-06-13T17:38:28Z","element_count":84,"note":"5軸GA polish 47->98 by M5 (autonomous)","saved_by":"mcp","sha256":"8c088d90c56033c741012ae3200265f6a7bd9e273c5b16f8d4a9e191a657db0a","version":3},{"created_at":"2026-06-13T17:30:58Z","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":"510d3824ac3d3101dfe962b6cb69df07fb3a62e209098d21af843ec06646952d","version":2},{"created_at":"2026-06-13T17:30:57Z","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}]}