/**
 * Syntax highlighting utilities for CLI output.
 *
 * @module
 */
import type { BundledLanguage } from "shiki";
/**
 * Highlight a code snippet with Shiki and convert to terminal colors.
 */
export declare function highlightCode(code: string, lang?: BundledLanguage): Promise<string>;
/**
 * Highlight an .env file with syntax highlighting.
 * Shows KEY in blue, = in gray, VALUE in yellow.
 */
export declare function highlightEnvLine(line: string): string;
/**
 * Highlight multiple .env lines.
 */
export declare function highlightEnvBlock(content: string): string;
/**
 * Create a visual diff between two values.
 */
export declare function createDiff(oldValue: string, newValue: string): {
    removed: string;
    added: string;
    lineDiff: string;
};
//# sourceMappingURL=highlighter.d.ts.map