{"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-tea0yi52","versions":[{"created_at":"2026-06-13T20:46:43Z","element_count":84,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"e22acc1198cc320223b978c2b3e9cdaaa2631c139183401a003366f0d7d7165f","version":3},{"created_at":"2026-06-13T20:25:25Z","element_count":85,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"074924b8d47c58ac18a6674c1df60230d94a102630176ee7d6c0afd6cc518cc5","version":2},{"created_at":"2026-06-13T20:25:25Z","element_count":85,"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}]}