{"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-ai0rrwfq","versions":[{"created_at":"2026-06-11T01:05:15Z","element_count":90,"note":"5軸GA polish 47->97 by M5 (autonomous)","saved_by":"mcp","sha256":"c43311be2f429b3e839b829afaa45a6cc3df3e69349f8888f6b66a5f62c9ad6e","version":13},{"created_at":"2026-06-10T22:24:31Z","element_count":50,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"c36b106859b108758dfd2a4df5edbd680bc47ab6454f73339f6c39be9a8923de","version":2}]}