{"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-bo263ro2","versions":[{"created_at":"2026-06-26T06:28:49Z","element_count":83,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"b2ee2d53c917f68f0887ab2fe653b0927fd36aed28cf775534008bfa6c314be7","version":3},{"created_at":"2026-06-26T06:25:51Z","element_count":88,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"5ef51da1cf8fd6cffff9c318e5fc7626370966a923cc0742306ccbe6cf987bc2","version":2},{"created_at":"2026-06-26T06:25:51Z","element_count":88,"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}]}