/**
 * Preprocessor for .prompt files.
 * Injects imports for built-in components and wraps raw JSX with export default.
 *
 * Preprocessing is determined by file extension, not by scanning source content.
 * .prompt files always receive full preprocessing (import injection + export wrapping).
 * All other files (.tsx, .ts, etc.) are returned unchanged — they are expected to
 * manage their own imports and exports.
 *
 * This avoids false positives from content-based regex detection, where non-JS
 * `import` keywords (e.g., Python's `import hashlib`) or `export default` inside
 * code examples could be mistakenly detected as real JS statements (issue #29).
 */
export interface PreprocessOptions {
    /** Original filename for error messages */
    filename: string;
}
/**
 * Check if a file is a .prompt file based on extension.
 */
export declare function isPromptFile(filename: string): boolean;
/**
 * Preprocess source code for .prompt files.
 *
 * .prompt files always receive:
 * - Import injection for all built-in components
 * - Fragment wrapping around the content (so the uses-to-import Babel plugin
 *   can find and transform any <Uses> elements within the JSX tree)
 * - Export default wrapping
 *
 * Non-.prompt files are returned unchanged.
 *
 * @param source - Raw source code
 * @param options - Preprocessing options (must include filename)
 * @returns Preprocessed source code ready for Babel transformation
 */
export declare function preprocessSource(source: string, options: PreprocessOptions): string;
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