{"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-he6picpm","versions":[{"created_at":"2026-06-18T19:22:35Z","element_count":89,"note":"5軸GA polish 39->93 by M5 (autonomous)","saved_by":"mcp","sha256":"e9e5a50fa3aad3df479cde52cb09f934eae05e3961e865706a02ae083a7b1261","version":3},{"created_at":"2026-06-18T19:19:37Z","element_count":86,"note":"loop3: 設計時延床 70.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"525f888ac5c5867186ae5848b1001e89ad742a67e1523a62a98751985a421211","version":2},{"created_at":"2026-06-18T19:19:35Z","element_count":86,"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}]}