import { Logger, LoggerConfig } from './logger.js';
/**
 * @happyvertical/logger - Structured logging for HAVE SDK
 *
 * Provides a structured logging interface with signal adapter integration.
 * Supports configurable log levels and console output.
 *
 * @example
 * ```typescript
 * import { createLogger, LoggerAdapter } from '@happyvertical/logger';
 *
 * // Create logger
 * const logger = createLogger({ level: 'info' });
 * logger.info('Application started');
 *
 * // Integrate with signals
 * const adapter = new LoggerAdapter(logger);
 * ```
 */
export { LoggerAdapter } from './adapter.js';
export { ConsoleLogger } from './console.js';
export type { Logger, LoggerConfig, LogLevel } from './logger.js';
export type { Signal, SignalAdapter, SignalType } from './signal-types.js';
/**
 * Create a logger from configuration
 *
 * Supports environment variable configuration via HAVE_LOGGER_LEVEL.
 * User-provided options take precedence over environment variables.
 *
 * @param config - Logger configuration (boolean or object)
 * @returns Configured logger instance
 *
 * @example
 * ```typescript
 * // Console logger with 'info' level (default)
 * const logger1 = createLogger(true);
 *
 * // Console logger with level from HAVE_LOGGER_LEVEL env var
 * process.env.HAVE_LOGGER_LEVEL = 'debug';
 * const logger2 = createLogger(true); // Uses 'debug' from env
 *
 * // No-op logger (all log calls are discarded)
 * const logger3 = createLogger(false);
 *
 * // Console logger with 'debug' level (overrides env)
 * const logger4 = createLogger({ level: 'debug' });
 *
 * // Custom log level (user options take precedence)
 * process.env.HAVE_LOGGER_LEVEL = 'info';
 * const logger5 = createLogger({ level: 'warn' }); // Uses 'warn' not 'info'
 * ```
 */
export declare function createLogger(config: LoggerConfig): Logger;
/** @internal */
export declare const PACKAGE_VERSION_INITIALIZED = true;
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