/**
 * Descriptive output naming for node tools (2026-09).
 *
 * A render-chain run carries `params.outputName` = "<Subject> (YYYY-MM-DD)"
 * (the task subject), set by the backend from the backing task. Tools compose
 * their final file name as `<outputName> — <Artifact>.<ext>`; without it they
 * fall back to their historical generic name.
 */
export declare function outputBaseName(params: Record<string, unknown>): string;