/**
 * Configuration options for extract command operations.
 *
 * Controls the behaviour of the extract command, which writes inline base64 image data URIs out to
 * real image files.
 *
 * @category Commands
 */
export interface ExtractOptions {
    /** Directory the extracted image files are written to (default: alongside each markdown file) */
    outputDir?: string;
    /** Perform a dry run without making actual changes */
    dryRun?: boolean;
    /** Enable verbose output with detailed progress information */
    verbose?: boolean;
    /** Output results in JSON format instead of the human-readable summary */
    json?: boolean;
}
/**
 * Summary of an extract run, in the shape emitted by `--json`.
 *
 * @category Commands
 */
export interface ExtractSummary {
    /** Always "extract", so JSON consumers can identify the command */
    command: "extract";
    /** Whether the run completed without errors */
    success: boolean;
    /** Whether this was a dry run, so no files were touched */
    dryRun: boolean;
    /** Number of markdown files examined */
    filesProcessed: number;
    /** Markdown files whose content was rewritten (empty in a dry run) */
    filesModified: string[];
    /** Number of inline data URIs rewritten to file links */
    imagesExtracted: number;
    /** Image files created (empty in a dry run) */
    imagesCreated: string[];
    /** Error messages, one per failure */
    errors: string[];
    /** Warning messages */
    warnings: string[];
}
/**
 * CLI command handler for extract operations.
 *
 * Writes each inline base64 image data URI in the given markdown files out to a real image file and
 * rewrites the markdown to link to it. The image filename derives from the alt text when it yields
 * a usable slug, otherwise a per-file `img-1`, `img-2`, ... counter is used; the extension comes
 * from the data URI's mime type.
 *
 * @category Commands
 *
 * @example
 *   ```bash # Extract every inline image, writing files next to the markdown markmv extract doc.md
 *
 *   # Write images to a shared asset directory markmv extract docs/*.md --output-dir assets/ ```;
 *
 * @param patterns - File patterns to process (supports globs)
 * @param options - Command options
 *
 * @throws Will exit the process with code 1 if the operation fails
 */
export declare function extractCommand(patterns: string[], options: ExtractOptions): Promise<void>;
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