{"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-sunsetridgebungalow-0b7jfegg","versions":[{"created_at":"2026-07-31T04:27:18Z","element_count":107,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"e753b968c1ac406631a08209ea74528eabbfdf2c3b1039ac8e01d061b1a23517","version":2},{"created_at":"2026-07-31T04:27:18Z","element_count":107,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}