{"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-ocb00q6i","versions":[{"created_at":"2026-06-11T04:11:16Z","element_count":72,"note":"5軸GA polish 41->92 by M5 (autonomous)","saved_by":"mcp","sha256":"a04aa25066db39146ca20017318ef117f902a27cf0026eef6880878bf7506699","version":3},{"created_at":"2026-06-11T03:59:30Z","element_count":83,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"79703d76278ac50b27a25a5440f8434ce07b7c16806f8eb1f96054c3a4f41316","version":2}]}