{"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-9w74djf8","versions":[{"created_at":"2026-07-13T10:23:55Z","element_count":54,"note":"5軸GA polish 42->90 by M5 (autonomous)","saved_by":"mcp","sha256":"70dce5a8737e0852fda63c884860e1035d5eead28827182d1713f193f321af9f","version":3},{"created_at":"2026-07-13T10:09:05Z","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":"07843e970b3532bf4babcf0da5bff3cb6009fe24e22d591ab4ca92f88c4c0913","version":2},{"created_at":"2026-07-13T10:09:05Z","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}]}