/**
 * Module-level logger for the openclaw-bytedance plugin.
 *
 * The OpenClaw host hands the plugin a `PluginLogger` only at `register(api)`
 * time. Provider plugins (web search / media understanding) are plain data
 * objects whose runtime methods are invoked later by the host without a
 * logger argument, so we capture the host logger at registration time and
 * expose it through this module to the runtime files.
 *
 * Design:
 *   - Default is a no-op so unit tests / direct imports never crash.
 *   - `setPluginLogger(api.logger)` is called from `index.ts` register().
 *   - All log lines are prefixed with `[bytedance] ...` to match OpenClaw's
 *     extension convention (matches `extensions/voice-call`,
 *     `extensions/memory-core`, etc).
 *   - `debug` is optional on `PluginLogger`, so we forward it through `?.`
 *     and silently drop debug lines when the host did not wire a debug sink.
 */
/** Minimal subset of openclaw's PluginLogger we depend on. */
export interface PluginLoggerLike {
    debug?: (message: string) => void;
    info: (message: string) => void;
    warn: (message: string) => void;
    error: (message: string) => void;
}
/** Inject the host-provided logger. Called once from `index.ts#register`. */
export declare function setPluginLogger(logger: PluginLoggerLike | undefined): void;
/** Reset to no-op (useful for tests). */
export declare function resetPluginLogger(): void;
export declare const log: {
    debug(message: string): void;
    info(message: string): void;
    warn(message: string): void;
    error(message: string): void;
};
/**
 * Format an error/exception consistently for log output.
 * Keeps it short (no stack flood) while preserving useful detail.
 */
export declare function formatErr(err: unknown): string;
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