{"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-wnja16q0","versions":[{"created_at":"2026-07-05T17:59:20Z","element_count":90,"note":"5軸GA polish 41->94 by M5 (autonomous)","saved_by":"mcp","sha256":"163112f5bd0979443bae59bbad135a4a0afbb335fdaa763c23146c8586591a07","version":3},{"created_at":"2026-07-05T17:55:48Z","element_count":86,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"64676e5405ac11e24a78e52b64caf882ecd7b4e17f1f4d5b93b2f41342bbb857","version":2},{"created_at":"2026-07-05T17:55:48Z","element_count":86,"note":"言葉から生成: LDK+主寝室+子供室+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}