{"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-willowbrookbungalow-spgsdhee","versions":[{"created_at":"2026-07-22T18:34:28Z","element_count":134,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"8b18bb8b7bea4a20596ecfcd787c7ab3d22c26f8b560665fa0e6fa9585e0f640","version":2},{"created_at":"2026-07-22T18:34:28Z","element_count":134,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}