/**
 * Log levels following syslog severity (https://en.wikipedia.org/wiki/Syslog#Severity_level)
 * Lower numbers = more severe, higher numbers = more verbose
 */
declare const LOG_LEVEL: {
    readonly ERR: 3;
    readonly WARN: 4;
    readonly NOTICE: 5;
    readonly INFO: 6;
    readonly DEBUG: 7;
    readonly TRACE: 8;
};
export type LogLevelName = keyof typeof LOG_LEVEL;
export type LogLevelValue = (typeof LOG_LEVEL)[LogLevelName];
export declare const LOG_LEVEL_DEFAULT: LogLevelValue;
/** Valid log level names for CLI parsing */
export declare const LOG_LEVEL_NAMES: Lowercase<LogLevelName>[];
/** Parse a log level string (name or number) to its numeric value */
export declare function parseLogLevel(level: string): LogLevelValue;
export interface OutputCtlOptions {
    logLevel?: LogLevelValue;
    jsonMode?: boolean;
}
/** Interface for output controllers (used to allow test mocks) */
export interface IOutputCtl {
    error(msg: unknown): void;
    warn(msg: unknown): void;
    notice(msg: unknown): void;
    info(msg: unknown): void;
    debug(msg: unknown): void;
    trace(msg: unknown): void;
    print(simple: unknown, json: unknown): void;
}
export default class OutputCtl implements IOutputCtl {
    private json;
    private logLevel;
    constructor({ logLevel, jsonMode }?: OutputCtlOptions);
    error(msg: unknown): void;
    warn(msg: unknown): void;
    notice(msg: unknown): void;
    info(msg: unknown): void;
    debug(msg: unknown): void;
    trace(msg: unknown): void;
    print(simple: unknown, json: unknown): void;
}
export {};
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