{"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-house-bc0x11v5","versions":[{"created_at":"2026-08-14T15:03:54Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"21888b2a7a4268eeab8eb0e40d2cb2c0e72cdfeaeeda1a2309b9d5e3366407a0","version":2},{"created_at":"2026-08-14T15:03:54Z","element_count":105,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}