/**
 * @license
 * Copyright 2025 Steven Roussey <sroussey@gmail.com>
 * SPDX-License-Identifier: Apache-2.0
 */
/**
 * Set a value on an object using dot-notation key (e.g. "a.b.c").
 * Creates intermediate objects as needed. Skips keys that could cause prototype pollution.
 */
export declare function setNestedValue(obj: Record<string, unknown>, key: string, value: unknown): void;
/**
 * Get a value from an object using dot-notation key (e.g. "a.b.c").
 * Returns undefined if any segment is missing or if the key would touch prototype-pollution-sensitive properties.
 */
export declare function getNestedValue(obj: Record<string, unknown>, key: string): unknown;
/**
 * Read all of stdin as a string.
 */
export declare function readStdin(): Promise<string>;
/**
 * Write result as JSON to a file or stdout.
 */
export declare function outputResult(result: unknown, outputJsonFile?: string): Promise<void>;
/**
 * Format a task/workflow execution error for clean user-facing output.
 * Strips stack traces and source code snippets, showing only the message.
 */
export declare function formatError(err: unknown): string;
/**
 * Format an array of objects as a simple aligned table.
 */
export declare function formatTable(rows: Record<string, string>[], columns: string[]): string;