{"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-8tr85xi0","versions":[{"created_at":"2026-07-01T06:56:34Z","element_count":90,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"de0789f1386a9856bbf7fa7ddaf4cc41ddfb52f1f204431adc93be34e155383e","version":3},{"created_at":"2026-07-01T06:46:35Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"e430f7f1e69c0b50e3b37936f900478564002beaffcc749fc2c265fe9cbedf02","version":2},{"created_at":"2026-07-01T06:46:35Z","element_count":105,"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}]}