{"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-house-vam7ujuf","versions":[{"created_at":"2026-06-11T04:11:17Z","element_count":70,"note":"5軸GA polish 47->95 by M5 (autonomous)","saved_by":"mcp","sha256":"1f233444cd05aee2a012882f6748dd278e621820f686fe8187d7f0b5295f8ed6","version":3},{"created_at":"2026-06-11T04:04:09Z","element_count":105,"note":"loop3: 設計時延床 100.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"fcf1254f633b36ecc27088197dde7e0caa948889054b93a9b871ba66d70b8039","version":2}]}