/**
 * Plain-text diff rendering for LLM consumption.
 * Extracted from the TUI interactive mode diff renderer, with all ANSI
 * styling removed — the output is plain text suitable for LLM input.
 */
export interface RenderDiffOptions {
    /** File path (unused, kept for API compatibility) */
    filePath?: string;
}
/**
 * Render a diff string as plain text with markers.
 * - Context lines: unchanged
 * - Removed lines: prefixed with "-"
 * - Added lines: prefixed with "+"
 */
export declare function renderDiff(diffText: string, _options?: RenderDiffOptions): string;
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