{"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-rat8uk1l","versions":[{"created_at":"2026-07-18T06:06:58Z","element_count":89,"note":"5軸GA polish 43->96 by M5 (autonomous)","saved_by":"mcp","sha256":"49bc76aa19987ed4d8254d1221277b64aa5f5f9455ea0c44963cdadc0917c525","version":3},{"created_at":"2026-07-18T05:55:40Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"247f7788c58c7eafe3ce4a7849fce131ec8d34875ea5a90a9a12fce9a693c267","version":2},{"created_at":"2026-07-18T05:55:40Z","element_count":126,"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}]}