/**
 * Add Astro Environment Variables Config for using 'astro:env'
 */
export declare const addAstroEnvConfig: import("astro-integration-kit").HookUtility<"astro:config:setup", [env: {
    validateSecrets: boolean;
    schema: Record<string, ({
        context: "client";
        access: "public";
    } | {
        context: "server";
        access: "public";
    } | {
        context: "server";
        access: "secret";
    }) & ({
        type: "string";
        length?: number | undefined;
        includes?: string | undefined;
        endsWith?: string | undefined;
        startsWith?: string | undefined;
        default?: string | undefined;
        optional?: boolean | undefined;
        max?: number | undefined;
        min?: number | undefined;
        url?: boolean | undefined;
    } | {
        type: "number";
        default?: number | undefined;
        optional?: boolean | undefined;
        max?: number | undefined;
        min?: number | undefined;
        gt?: number | undefined;
        lt?: number | undefined;
        int?: boolean | undefined;
    } | {
        type: "boolean";
        default?: boolean | undefined;
        optional?: boolean | undefined;
    } | {
        values: string[];
        type: "enum";
        default?: string | undefined;
        optional?: boolean | undefined;
    })>;
}], void>;