{"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-willowbrookhouse-t8c9or6u","versions":[{"created_at":"2026-06-28T15:38:00Z","element_count":83,"note":"5軸GA polish 38->92 by M5 (autonomous)","saved_by":"mcp","sha256":"6e56e8ba4dd6505344c94fcb3428b3c302be5faa444ff19cc6da3a9bdd9f6454","version":3},{"created_at":"2026-06-28T15:36:13Z","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":"c0f12b0f37de30f8aa302f28e20633f9758688c11e47a677b8d1bcce66cdeeb3","version":2},{"created_at":"2026-06-28T15:36:12Z","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}]}