import { CommandError } from '@twak/core';
export declare function output(data: unknown, json: boolean): void;
export declare function success(message: string): void;
export declare function error(message: string): void;
export declare function warn(message: string): void;
export declare function info(message: string): void;
export declare function dim(message: string): void;
/**
 * Classify an error into a `CommandError` — pure, no side effects.
 *
 * Flow:
 *   1. If already a CommandError → return unchanged (preserves subclass identity).
 *   2. Else try the classifier chain: TwakError → fs → wallet-load.
 *   3. Else → CommandError('UNKNOWN_ERROR', rawMessage).
 *
 * Use when you need the typed code but want to control how it's surfaced
 * (e.g. the watch daemon logs classified tick errors without setting exitCode).
 */
export declare function classifyError(err: unknown): CommandError;
/**
 * Standard error handler for command action blocks.
 *
 * Output:
 *   - json=true:  emit a single JSON object to stdout: { error, errorCode }.
 *   - json=false: print human message to stderr. Unknown errors get prefixed with
 *                 `${fallbackPrefix}: ...` so the user knows the command failed even if
 *                 the raw message is opaque.
 *
 * Always sets process.exitCode = 1.
 */
export declare function handleCommandError(err: unknown, json: boolean, fallbackPrefix: string): void;
export declare function safeExit(): void;
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