{"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-b8gkbuqo","versions":[{"created_at":"2026-06-13T20:00:39Z","element_count":70,"note":"5軸GA polish 47->96 by M5 (autonomous)","saved_by":"mcp","sha256":"332cc9083940a2daea40855334410f1579942bc26e07c1d6f9a492d6ec5f478f","version":3},{"created_at":"2026-06-13T19:54:00Z","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":"4155aff3c136bebbfe9a02ecfa451c93f23cf85e2172a665672a82ab3122c082","version":2},{"created_at":"2026-06-13T19:53:59Z","element_count":107,"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}]}