import { z } from 'zod';
export declare const stringToken: z.ZodObject<{
    $description: z.ZodOptional<z.ZodString>;
    $deprecated: z.ZodOptional<z.ZodUnion<readonly [z.ZodString, z.ZodBoolean]>>;
    $value: z.ZodUnion<readonly [z.ZodString, z.ZodString]>;
    $type: z.ZodLiteral<"number" | "border" | "color" | "fontFamily" | "fontWeight" | "transition" | "duration" | "dimension" | "gradient" | "shadow" | "typography" | "cubicBezier" | "custom-viewportRange" | "custom-string">;
    $extensions: z.ZodOptional<z.ZodObject<{
        'org.primer.llm': z.ZodOptional<z.ZodObject<{
            usage: z.ZodOptional<z.ZodArray<z.ZodString>>;
            rules: z.ZodOptional<z.ZodString>;
        }, z.core.$strip>>;
    }, z.core.$strip>>;
}, z.core.$strict>;