/**
 * ADRFlow Logger
 *
 * Simple, structured logging for ADRFlow.
 * Outputs JSON logs to stderr to avoid interfering with MCP stdio.
 *
 * @module adrflow/utils/logger
 */
/**
 * Log levels
 */
export declare const LogLevel: {
    readonly DEBUG: "debug";
    readonly INFO: "info";
    readonly WARN: "warn";
    readonly ERROR: "error";
};
export type LogLevel = (typeof LogLevel)[keyof typeof LogLevel];
/**
 * Logger configuration
 */
export interface LoggerConfig {
    /** Minimum level to log */
    readonly level: LogLevel;
    /** Whether to output JSON or human-readable format */
    readonly json: boolean;
    /** Component name to include in logs */
    readonly component?: string;
}
/**
 * Logger class
 */
export declare class Logger {
    private readonly config;
    constructor(config?: Partial<LoggerConfig>);
    /**
     * Creates a child logger with a component name
     */
    child(component: string): Logger;
    /**
     * Logs a debug message
     */
    debug(message: string, data?: Record<string, unknown>): void;
    /**
     * Logs an info message
     */
    info(message: string, data?: Record<string, unknown>): void;
    /**
     * Logs a warning message
     */
    warn(message: string, data?: Record<string, unknown>): void;
    /**
     * Logs an error message
     */
    error(message: string, error?: Error, data?: Record<string, unknown>): void;
    /**
     * Internal log method
     */
    private log;
    /**
     * Checks if a level should be logged
     */
    private shouldLog;
    /**
     * Writes a log entry to stderr
     */
    private write;
}
/**
 * Default logger instance
 */
export declare const logger: Logger;
/**
 * Creates a logger for a specific component
 */
export declare function createLogger(component: string): Logger;
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