/**
 * Shared utilities for screenshot platform implementations
 */
/**
 * Check if a command-line tool is available on the system.
 * Uses execFileSync to avoid shell injection.
 */
export declare function hasTool(name: string): boolean;
/**
 * Run a PowerShell script by writing it to a temp .ps1 file.
 * Avoids shell quoting issues with inline -Command.
 */
export declare function runPowerShell(script: string, timeoutMs?: number, prefix?: string): string;
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