{"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-morrisedgebungalowho-58odgvgj","versions":[{"created_at":"2026-06-11T04:11:22Z","element_count":83,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"d5b05b7cb02f2d472d77cb09d2d5666493b3c8e6fa71fe24130744ef76bacbc0","version":3},{"created_at":"2026-06-11T04:01:46Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"b533824e97d02cdd3be619d76bda7a734d4c4c8d3d38b77493aa32cdc5203211","version":2}]}