{"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-ko7m7oud","versions":[{"created_at":"2026-08-20T15:53:18Z","element_count":101,"note":"loop3: 設計時延床 75.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"f0c1fe4b73196bcc96004cece12b4b12d49a6459c44cc5ea1f2a2f019aa92670","version":2},{"created_at":"2026-08-20T15:53:17Z","element_count":101,"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}]}