interface StartOptions {
    port?: string;
    browser?: boolean;
    headless?: boolean;
    autoUpgrade?: boolean;
}
export declare function startCommand(options: StartOptions): Promise<void>;
/**
 * Calculate the Node.js heap size based on available system memory.
 *
 * Allocates HEAP_MEMORY_RATIO (60%) of total RAM, clamped between
 * MIN_HEAP_SIZE_MB and MAX_HEAP_SIZE_MB. Prevents OOM/swapping on
 * low-RAM machines while still allowing generous heaps on large ones.
 *
 * @returns Heap size in megabytes
 */
export declare function calculateHeapSize(): number;
export {};
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