{"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-tybcopbl","versions":[{"created_at":"2026-06-16T06:24:29Z","element_count":90,"note":"5軸GA polish 45->96 by M5 (autonomous)","saved_by":"mcp","sha256":"945e44667747910ce4ad132afdb85060dd6f14cd38f1dfe56837fde0fc5b38c7","version":3},{"created_at":"2026-06-16T06:11:27Z","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":"12cb73342c044c543838a58f18fd2eebccae243940eabd98c3a867bd48cde750","version":2},{"created_at":"2026-06-16T06:11:26Z","element_count":105,"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}]}