{"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-wasx1zx2","versions":[{"created_at":"2026-06-13T20:14:55Z","element_count":70,"note":"5軸GA polish 44->93 by M5 (autonomous)","saved_by":"mcp","sha256":"72b43ece2a9faff72a7186529ae69f64ae10dc89a67c145f48ca9895774cd289","version":3},{"created_at":"2026-06-13T20:09:56Z","element_count":101,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"01bbf58d1ea71bc34dbf123c063af8a9e968c2202832b68a0c21fc4e55580247","version":2},{"created_at":"2026-06-13T20:09:55Z","element_count":101,"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}]}