{"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-2v7hvij3","versions":[{"created_at":"2026-06-28T17:41:08Z","element_count":71,"note":"5軸GA polish 41->92 by M5 (autonomous)","saved_by":"mcp","sha256":"52549b39ffe4fa1af13822da4a90b0734864af5b705a49266032c674162393d3","version":3},{"created_at":"2026-06-28T17:37:13Z","element_count":101,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"13a2f54ab71b4780655a35f3819ee0e1462357a7216bb2d6b71adfc75305aaf4","version":2},{"created_at":"2026-06-28T17:37:13Z","element_count":101,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}