/**
 * Timestamped logger — all output goes to stderr (stdout is MCP JSON-RPC).
 * The prefix is configurable so each consumer can identify itself.
 */
export declare function setLogPrefix(prefix: string): void;
/** CLI verbs call this: diagnostics belong to the daemon's log, not a person's terminal. */
export declare function silenceLog(): void;
export declare function log(...args: unknown[]): void;
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