import { z } from 'zod';
/**
 * Environment schema definition
 */
export declare const envSchema: z.ZodObject<{
    /**
     * API Token for the AI service
     */
    API_TOKEN: z.ZodString;
    /**
     * AI provider to use (default: 'anthropic')
     */
    AI_PROVIDER: z.ZodDefault<z.ZodEnum<["anthropic", "openai"]>>;
    /**
     * Whether to run the server with SSE transport
     */
    RUN_SSE: z.ZodDefault<z.ZodOptional<z.ZodBoolean>>;
    /**
     * Port for the HTTP server (when using SSE)
     */
    PORT: z.ZodDefault<z.ZodOptional<z.ZodNumber>>;
}, "strip", z.ZodTypeAny, {
    API_TOKEN: string;
    AI_PROVIDER: "anthropic" | "openai";
    RUN_SSE: boolean;
    PORT: number;
}, {
    API_TOKEN: string;
    AI_PROVIDER?: "anthropic" | "openai" | undefined;
    RUN_SSE?: boolean | undefined;
    PORT?: number | undefined;
}>;
/**
 * Environment configuration type
 */
export type Env = z.infer<typeof envSchema>;
/**
 * Loads environment variables from command line arguments and env vars
 * @returns Validated environment configuration
 * @throws {EnvironmentValidationError} When environment validation fails
 */
export declare function loadEnv(): Env;