/**
 * Check if a process is currently running
 *
 * Cross-platform implementation:
 * - Windows: Uses `tasklist /FI "PID eq ${pid}" /NH` command
 * - Unix/Mac: Uses `process.kill(pid, 0)` (signal 0 = check existence only)
 *
 * Security: Uses safeExecSync for Windows (no shell injection risk)
 *
 * @param pid - Process ID to check
 * @returns true if process is running, false otherwise
 *
 * @example
 * ```typescript
 * // Check if process exists
 * if (isProcessRunning(12345)) {
 *   console.log('Process 12345 is running');
 * }
 *
 * // Check current process (always returns true)
 * if (isProcessRunning(process.pid)) {
 *   console.log('Current process is running');
 * }
 * ```
 */
export declare function isProcessRunning(pid: number): boolean;
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