import { z } from 'zod';
/**
 * Environment variable validation schema
 *
 * Validates all environment variables at startup to ensure proper configuration.
 * Uses Zod for runtime validation and type inference.
 */
export declare const envSchema: z.ZodObject<{
    /**
     * GraphQL API endpoint for Lagoon backend
     * Must be a valid URL
     * @default 'http://localhost:3001/query'
     */
    LAGOON_GRAPHQL_URL: z.ZodDefault<z.ZodString>;
    /**
     * Runtime environment
     * @default 'development'
     */
    NODE_ENV: z.ZodDefault<z.ZodEnum<["development", "production", "test"]>>;
    /**
     * Cache TTL in seconds (optional override)
     * @default 600 (10 minutes)
     */
    CACHE_TTL: z.ZodOptional<z.ZodEffects<z.ZodString, number, string>>;
    /**
     * Maximum number of cache entries (optional override)
     * @default 1000
     */
    CACHE_MAX_KEYS: z.ZodOptional<z.ZodEffects<z.ZodString, number, string>>;
}, "strip", z.ZodTypeAny, {
    LAGOON_GRAPHQL_URL: string;
    NODE_ENV: "development" | "production" | "test";
    CACHE_TTL?: number | undefined;
    CACHE_MAX_KEYS?: number | undefined;
}, {
    LAGOON_GRAPHQL_URL?: string | undefined;
    NODE_ENV?: "development" | "production" | "test" | undefined;
    CACHE_TTL?: string | undefined;
    CACHE_MAX_KEYS?: string | undefined;
}>;
/**
 * Validated environment variable type
 * Inferred from the Zod schema
 */
export type Env = z.infer<typeof envSchema>;
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