import type { OutputFormat } from "../types/index.js";
/**
 * Check if stdout is a TTY (interactive terminal).
 * Returns false when output is piped or redirected.
 */
export declare function isStdoutTTY(): boolean;
/**
 * Check if stderr is a TTY (interactive terminal).
 * Returns false when stderr is piped or redirected.
 */
export declare function isStderrTTY(): boolean;
/**
 * Get the default output format based on TTY detection.
 * - TTY (human): plain format for full content with labeled fields
 * - Non-TTY (piped/scripted): JSON for machine parsing
 */
export declare function getDefaultFormat(): OutputFormat;
/**
 * Set the --no-color flag state (called from CLI parser).
 */
export declare function setNoColorFlag(value: boolean): void;
/**
 * Determine if colored output should be used.
 *
 * Per https://no-color.org/ and clig.dev, colors are disabled when:
 * - --no-color flag is passed
 * - NO_COLOR env var is set (any non-empty value)
 * - TERM=dumb
 * - stdout is not a TTY (piped/redirected)
 */
export declare function shouldUseColor(): boolean;
//# sourceMappingURL=tty.d.ts.map