/**
 * Memory Journal MCP Server - MCP Protocol Logger
 *
 * Logging that sends structured messages via MCP notifications/message.
 * Falls back to stderr when MCP server is not connected.
 * Follows RFC 5424 severity levels as per MCP spec.
 */
import { type McpServer } from '@modelcontextprotocol/server';
/**
 * Narrow interface for MCP protocol log notification dispatch.
 * Decouples McpLogger from the SDK's SEP-2577 deprecation annotation on McpServer
 * while maintaining backward-compatible notifications/message support.
 */
export interface McpLoggingReceiver {
    sendLoggingMessage(params: {
        level: McpLogLevel;
        logger?: string;
        data: unknown;
    }): Promise<void> | void;
}
/**
 * MCP log levels per RFC 5424
 */
export type McpLogLevel = 'debug' | 'info' | 'notice' | 'warning' | 'error' | 'critical' | 'alert' | 'emergency';
interface LogData {
    message: string;
    module?: string;
    operation?: string;
    [key: string]: unknown;
}
/**
 * MCP Protocol Logger
 *
 * Sends structured log messages via MCP notifications/message protocol.
 * Falls back to stderr when server not connected.
 */
export declare class McpLogger {
    private server;
    private minLevel;
    /**
     * Connect to MCP server for protocol logging
     */
    setServer(server: McpServer | McpLoggingReceiver): void;
    /**
     * Set minimum log level (from logging/setLevel request)
     */
    setLevel(level: McpLogLevel): void;
    /**
     * Get current minimum log level
     */
    getLevel(): McpLogLevel;
    /**
     * Check if a level should be logged
     */
    private shouldLog;
    /**
     * Format message for stderr fallback
     */
    private formatForStderr;
    /**
     * Send log message via MCP protocol or fallback to stderr
     */
    log(level: McpLogLevel, loggerName: string, data: LogData): void;
    debug(loggerName: string, message: string, context?: Record<string, unknown>): void;
    info(loggerName: string, message: string, context?: Record<string, unknown>): void;
    notice(loggerName: string, message: string, context?: Record<string, unknown>): void;
    warning(loggerName: string, message: string, context?: Record<string, unknown>): void;
    error(loggerName: string, message: string, context?: Record<string, unknown>): void;
    critical(loggerName: string, message: string, context?: Record<string, unknown>): void;
}
export declare const mcpLogger: McpLogger;
export {};
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