{"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-0elgoazf","versions":[{"created_at":"2026-06-13T17:09:30Z","element_count":91,"note":"5軸GA polish 44->95 by M5 (autonomous)","saved_by":"mcp","sha256":"da7ddc9a9b7be4b3c5f6dba09e81a431c8a579cad9af6bd8b32027beeda1c5eb","version":3},{"created_at":"2026-06-13T17:00:41Z","element_count":86,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"59ad0f0fe7865eabf9093f4d7444f22765155d4b3830c48bfa2fd60a2be2c33b","version":2},{"created_at":"2026-06-13T17:00:36Z","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}]}