/**
 * Header config parser for session-based filtering
 */
import type { SessionToolFilterRequest } from '../types.js';
import type { RegexCompiler } from '../regex/regex-compiler.js';
/**
 * Parses X-Mcp4-Tools header for session filtering
 */
export declare class HeaderConfigParser {
    private compiler;
    constructor(compiler: RegexCompiler);
    /**
     * Parse header value into session filter request
     */
    parse(headerValue: string): SessionToolFilterRequest;
    /**
     * Normalize header value
     */
    private normalizeHeader;
    /**
     * Split and validate header parts
     */
    private splitAndValidate;
    /**
     * Parse header parts into structured data
     */
    private parseParts;
    /**
     * Get max entries from env var
     */
    private getMaxEntries;
    /**
     * Create empty request
     */
    private emptyRequest;
}
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