/**
 * Types for the tunnel command
 */
/**
 * Tunnel target types
 */
export type TunnelTarget = 'rds' | 'opensearch' | 'ec2' | 'lb';
export declare const OPENSEARCH_REMOTE_PORT = 443;
export declare const OPENSEARCH_DEFAULT_LOCAL_PORT = 9200;
/**
 * Options for the tunnel command
 */
export interface TunnelOptions {
    profile?: string;
    localPort?: string;
    cluster?: string;
    domain?: string;
    /**
     * Commander populates 'color' for the negatable `--no-color` flag (default
     * true, false when the flag is passed) - there is no `noColor` property.
     * See src/commands/seed/index.ts for the reference pattern this mirrors.
     */
    color?: boolean;
    verbose?: boolean;
}
/**
 * System configuration for a known system with an explicit EC2 tag.
 */
export interface ExplicitSystemConfig {
    /** EC2 Name tag to find bastion/jumpbox */
    ec2Tag: string;
    /** Default RDS cluster name */
    defaultCluster?: string;
    /** Default database port */
    defaultPort: number;
}
/**
 * Default system configuration for new/unknown systems.
 * Does not carry ec2Tag — resolveBastionTag derives the tag from the AWS account alias.
 */
export interface DefaultSystemConfig {
    /** Default RDS cluster name */
    defaultCluster?: string;
    /** Default database port */
    defaultPort: number;
}
/**
 * System configurations
 * roma = old world (bastion-host, MySQL)
 * others = new world (jumpbox, typically PostgreSQL)
 */
export declare const SYSTEM_CONFIGS: Record<string, ExplicitSystemConfig>;
/**
 * Default configuration for new/unknown systems
 */
export declare const DEFAULT_SYSTEM_CONFIG: DefaultSystemConfig;
/**
 * Get system configuration
 */
export declare function getSystemConfig(system: string): ExplicitSystemConfig | DefaultSystemConfig;
/**
 * Map database engine to standard port
 * @param engine Database engine string from RDS metadata
 * @returns Standard port for the engine, or undefined if unknown
 */
export declare function getPortForEngine(engine: string | undefined): number | undefined;
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