{"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-riversidebungalowhou-5ygfr7yv","versions":[{"created_at":"2026-07-22T08:17:35Z","element_count":90,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"103a2cff3ab27250db3c21ebe7c9b2bca40f5e6e43bef15c1156566e2d5c8f8f","version":2},{"created_at":"2026-07-22T08:17:34Z","element_count":90,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}