/**
 * Syntax highlighter for log messages.
 *
 * Applies color highlighting to specific elements within log messages.
 * Uses standard ANSI SGR codes compatible with xterm.js.
 *
 * IMPORTANT: Only highlights plain text - skips lines with existing ANSI codes
 * to prevent mixing codes and creating visual artifacts.
 *
 * @module components/devenv/terminal/parsing/syntax
 */
/**
 * Syntax highlighter class.
 *
 * Applies syntax highlighting to plain text messages.
 * Skips messages that already contain ANSI codes to prevent
 * visual artifacts from mixed escape sequences.
 *
 * @example
 * ```ts
 * const highlighter = new SyntaxHighlighter();
 * const highlighted = highlighter.highlight('GET /api/workspaces { filter: {} }');
 * ```
 */
export declare class SyntaxHighlighter {
    /**
     * Apply syntax highlighting to a message.
     *
     * Only processes plain text - messages with existing ANSI codes
     * are returned unchanged to prevent visual artifacts.
     *
     * @param message - Message to highlight
     * @returns Message with ANSI color codes applied, or original if already colored
     */
    highlight(message: string): string;
    /**
     * Highlight HTTP methods.
     */
    private highlightHttpMethods;
    /**
     * Highlight URL paths.
     */
    private highlightPaths;
    /**
     * Highlight braces and brackets.
     */
    private highlightBraces;
    /**
     * Highlight property keys.
     */
    private highlightKeys;
    /**
     * Highlight string values.
     */
    private highlightStrings;
    /**
     * Highlight numeric values.
     */
    private highlightNumbers;
    /**
     * Highlight boolean values.
     */
    private highlightBooleans;
    /**
     * Highlight null and undefined.
     */
    private highlightNullish;
}
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