{"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-zphwpdvi","versions":[{"created_at":"2026-06-11T01:39:16Z","element_count":70,"note":"5軸GA polish 45->96 by M5 (autonomous)","saved_by":"mcp","sha256":"e64e4776bb22e239f6f6c6182ec6eff06d6a6fd0085328cda55497c15e489ff8","version":9},{"created_at":"2026-06-10T23:24:49Z","element_count":54,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"d69aefc764bb644aecd098b7fd81372d55c5324b29001ad09fe56ef32e3d2dc5","version":2}]}