/** Fixed host service configuration used by the native supervisor. */
export type DeploymentPortAllocation = {
    mode: 'fixed';
    ports: readonly number[];
} | {
    mode: 'dynamic';
    from: number;
    to: number;
};
export interface DeploymentService {
    strategy: 'direct' | 'blue-green';
    /** Stable loopback ingress used by Tunnel/nginx consumers. */
    publicPort: number;
    /** One application port for direct, two for blue-green. */
    applicationPorts: DeploymentPortAllocation;
    /** Exact argv. `${FZ_APP_PORT}` and `${FZ_RELEASE}` are materialized by the Agent. */
    command: readonly string[];
    healthPath: string;
    /** Optional node-wide active connection ceiling enforced by nginx with HTTP 503. */
    maxConnections?: number;
    websocket?: boolean;
    drainMs?: number;
}
export declare class DefinitionError extends Error {
    constructor(message: string);
}
export declare function validateDeploymentService(value: unknown, where?: string): DeploymentService;