{"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-hawthorngrovehouse-zuo4h44g","versions":[{"created_at":"2026-06-25T19:41:10Z","element_count":52,"note":"5軸GA polish 38->87 by M5 (autonomous)","saved_by":"mcp","sha256":"aa88d13eebfab4151535ecd99a98efa497e5b8b14df5ca942ba58ee11f99f99b","version":3},{"created_at":"2026-06-25T19:38:33Z","element_count":101,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"fbe87bf9402db8d14d1ddb55965a0d0b868c969c42b3fff194a478f86ca9613c","version":2},{"created_at":"2026-06-25T19:38:33Z","element_count":101,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}