/**
 * Injectable process-facing effects for the TUI runner. Tests substitute the
 * Ink mount with a capturing fake and the streams with string sinks, keeping
 * the runner's lifecycle testable without a terminal.
 *
 * @module @deepseek-ai/dsh-tui/internals
 */
import type { ReactElement } from 'react';
/** A mounted terminal app instance; the runner owns unmount ordering. */
export interface TuiMount {
    /** Replace the root element while preserving Ink's single terminal owner. */
    rerender(element: ReactElement): void;
    /** Tear the terminal app down before flush and exit. */
    unmount(): void;
}
/** The Ink mount seam: renders the app element and returns its handle. */
export type Mount = (element: ReactElement) => TuiMount;
/** Substitutable runner effects; production values write to the real terminal. */
export declare const internals: {
    /** Ink renderer mount; tests substitute a fake that captures the element. */
    mount: Mount;
    /** Diagnostics stream for direct-driver failures. */
    stderr: {
        write(chunk: string): unknown;
    };
};