{"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-rflft88j","versions":[{"created_at":"2026-06-22T19:39:40Z","element_count":84,"note":"5軸GA polish 43->97 by M5 (autonomous)","saved_by":"mcp","sha256":"eaf667bc7cb3fe65f05727f00d458f465ba01fdd14c06365ce3055ec871cbbd6","version":3},{"created_at":"2026-06-22T19:29:58Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"80209c43efa5d950bfa213aa3d97972d04b93bbf9ce98ef8a9d3f71e91b2e18d","version":2},{"created_at":"2026-06-22T19:29:58Z","element_count":105,"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}]}