export type DiffOp = {
    type: 'no_change';
} | {
    type: 'update_line';
    line: number;
    content: string;
} | {
    type: 'delete_line';
    line: number;
} | {
    type: 'insert_line';
    line: number;
    content: string;
};
/**
 * Diff two frames to generate minimal update operations.
 *
 * Strategy:
 * - If only a small continuous region of a line changes, use partial update
 * - If multiple regions change or changes are scattered, redraw the whole line
 * - When lines are deleted, all lines below need to be redrawn (reflow)
 */
export declare function diffFrames(prev: string[], curr: string[]): DiffOp[];
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