{"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-mt2mdai2","versions":[{"created_at":"2026-06-13T16:42:52Z","element_count":72,"note":"5軸GA polish 43->93 by M5 (autonomous)","saved_by":"mcp","sha256":"5fb4955ea3cb729a337d0e98d247b355901896ae55cc97e5ac9abf7074657bec","version":3},{"created_at":"2026-06-13T16:34:33Z","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":"8d0c04e75e39c4f57ec6e09b9061bc4e63fc40c0ae51a96b28065ea4cc044315","version":2},{"created_at":"2026-06-13T16:34:30Z","element_count":126,"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}]}