import type { CommandOptions } from '../types';
/**
 * Shared helpers for `head`/`tail`: resolve the line count from the usual flag forms and gather
 * inputs (named files, or stdin when none). Kept separate so both commands stay DRY.
 */
/** Resolve a line count from `-n N`, `-n=N`, or `-N` flags. Returns the count + remaining file args. */
export declare function resolveCount(flags: Record<string, boolean | string> | undefined, args: string[], def?: number): {
    count: number;
    files: string[];
};
/** Read each file's content (or stdin when no files). Throws a CLI-style message on a bad path. */
export declare function gatherInputs(files: string[], options: CommandOptions): Promise<Array<{
    name: string;
    content: string;
}>>;
/** Split into lines, dropping the single empty element a trailing newline produces (so counts match coreutils). */
export declare function toLines(content: string): string[];
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