/**
 * Linear-time trimming of repeated edge characters (avoids polynomial ReDoS on
 * patterns like `/^-+|-+$/` when applied to uncontrolled strings).
 */
export declare const MAX_UNTRUSTED_STRING_LEN = 8192;
export declare function stripLeadingTrailingHyphens(s: string, maxLen?: number): string;
export declare function stripLeadingTrailingUnderscores(s: string, maxLen?: number): string;
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