/**
 * FIXME: move to `agent-tars-cli`, the server should try to avoid file-related operations and states
 *
 * Ensures a working directory exists and returns its path
 * @param namespace workspace namespace, used when you need to isolate the execution of tasks
 * @param workspacePath optional path to workspace directory (defaults to CWD/agent-tars-workspace)
 * @param isolateSessions whether to create isolated session directories (default: false)
 * @param isDebug whether to log debug information
 * @returns Path to the working directory
 */
export declare function ensureWorkingDirectory(namespace: string, workspacePath?: string, isolateSessions?: boolean, isDebug?: boolean): string;
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