/**
 * cliUtils.ts
 *
 * Utilities for parsing CLI option values.
 *
 * This module provides a reusable parser for CLI flags that can accept either:
 * - boolean-like values (true/false, 1/0, yes/no, y/n)
 * - arbitrary string values (e.g., file paths)
 *
 * It is designed to work well with Commander-style short options where the value
 * may be concatenated without a space, e.g.:
 *   -w0, -wn, -wreview.md
 */
/**
 * Result of attempting to parse a CLI value as boolean-or-string.
 * When kind === 'boolean', value is a boolean.
 * When kind === 'string', value is a non-empty string.
 * When kind === 'none', no usable value was provided (undefined/null/empty).
 */
export type BooleanOrStringParseResult = {
    kind: 'boolean';
    value: boolean;
} | {
    kind: 'string';
    value: string;
} | {
    kind: 'none';
};
/**
 * Parse a CLI option value into either:
 * - a boolean (when value looks like a true/false token),
 * - a non-empty string (otherwise),
 * - or none (when value is nullish or only whitespace).
 *
 * Recognized false-like tokens (case-insensitive): 'false', '0', 'n', 'no'
 * Recognized true-like tokens (case-insensitive):  'true', '1', 'y', 'yes'
 *
 * Examples:
 *  parseBooleanOrString('n')         => { kind: 'boolean', value: false }
 *  parseBooleanOrString('0')         => { kind: 'boolean', value: false }
 *  parseBooleanOrString('true')      => { kind: 'boolean', value: true }
 *  parseBooleanOrString('1')         => { kind: 'boolean', value: true }
 *  parseBooleanOrString('review.md') => { kind: 'string',  value: 'review.md' }
 *  parseBooleanOrString('  ')        => { kind: 'none' }
 *  parseBooleanOrString(undefined)   => { kind: 'none' }
 */
export declare function parseBooleanOrString(value: unknown): BooleanOrStringParseResult;
/**
 * Convenience wrapper that returns a union directly instead of the tagged result.
 *
 * Returns:
 * - boolean when the input is a boolean-like token
 * - string when the input is non-empty and not a boolean-like token
 * - undefined when the input is nullish or empty/whitespace
 */
export declare function coerceBooleanOrString(value: unknown): boolean | string | undefined;