{"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-fm3r2rd3","versions":[{"created_at":"2026-06-22T19:39:35Z","element_count":72,"note":"5軸GA polish 41->92 by M5 (autonomous)","saved_by":"mcp","sha256":"e28c8d4fed46588c21b90639637c4f58bc65f6945ce8152783732da0d8717982","version":3},{"created_at":"2026-06-22T19:29:10Z","element_count":82,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"65c5ab2f549df28591f349d6cc7f58f2f5360b6b61e1c047f6e6a0c3f7c6dbd8","version":2},{"created_at":"2026-06-22T19:29:08Z","element_count":82,"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}]}