/**
 * Test Tagging & Filtering — v4.9.0
 *
 * Fluent tag filter for including/excluding tests by tags.
 * Supports CLI: --tag smoke --tag p0 --exclude-tag slow
 */
import type { TestCase } from './types';
export declare class TagFilter {
    private includeTags;
    private excludeTags;
    include(tags: string[]): TagFilter;
    exclude(tags: string[]): TagFilter;
    match(test: TestCase): boolean;
    filterTests(tests: TestCase[]): TestCase[];
    getIncludeTags(): string[];
    getExcludeTags(): string[];
    isEmpty(): boolean;
    toString(): string;
}
/**
 * Parse CLI-style tag arguments into a TagFilter.
 */
export declare function parseTagArgs(args: string[]): TagFilter;
/**
 * Extract all unique tags from a list of test cases.
 */
export declare function extractTags(tests: TestCase[]): string[];
/**
 * Group tests by tag for display.
 */
export declare function groupByTag(tests: TestCase[]): Map<string, TestCase[]>;
/**
 * Format tag statistics.
 */
export declare function formatTagStats(tests: TestCase[]): string;
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