{"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-hamiltonviewhouse-mj4i6or3","versions":[{"created_at":"2026-08-15T21:53:19Z","element_count":86,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"fe610ee8827fe46e4848bf351d489547107ec081649d14399a6e05d2ca93662c","version":2},{"created_at":"2026-08-15T21:53:19Z","element_count":86,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}