/** Output format for the run. `human` keeps the interactive TUI experience. */
export type OutputFormat = "human" | "json" | "fix-commands";
interface OutputState {
    format: OutputFormat;
    quiet: boolean;
    verbose: boolean;
}
export declare function configureOutput(next: Partial<OutputState>): void;
export declare function getOutputFormat(): OutputFormat;
/** True when stdout is reserved for machine-readable data. */
export declare function isMachineFormat(): boolean;
export declare function isQuiet(): boolean;
export declare function isVerbose(): boolean;
/**
 * Human-facing diagnostics always go to stderr so stdout stays pipeable.
 * Suppressed by `--quiet`.
 */
export declare function log(message?: string): void;
/** Warnings/errors go to stderr even in quiet mode. */
export declare function logError(message?: string): void;
/** Extra detail, only with `--verbose`. */
export declare function logDebug(message?: string): void;
/** Machine-readable data — the only thing ever written to stdout. */
export declare function emit(data: string): void;
export interface Spinner {
    start(text?: string): Spinner;
    succeed(text?: string): Spinner;
    fail(text?: string): Spinner;
}
/**
 * Spinner rendered on stderr. Disabled entirely in quiet mode, and degraded to
 * plain lines when stderr is not a TTY (CI logs, redirected output).
 */
export declare function createSpinner(text: string): Spinner;
export {};