/** Fluent JSON Schema builders following the classic Workers schema-builder API. */
declare const SCHEMA: unique symbol;
declare const KIND: unique symbol;
declare const VALUE: unique symbol;
export type StringFormat = "date-time" | "date" | "time" | "duration" | "email" | "hostname" | "ipv4" | "ipv6" | "uuid";
type Kind = "object" | "value";
type JsonSchema = {
    title?: string;
    description?: string;
} & ({
    type: "string" | "number" | "integer" | "boolean" | "null";
    enum?: readonly (string | number)[];
    format?: StringFormat;
} | {
    type: "array";
    items: JsonSchema;
    minItems?: 0 | 1;
} | {
    type: "object";
    properties: Record<string, JsonSchema>;
    required: string[];
    additionalProperties: false;
} | {
    anyOf: JsonSchema[];
});
export interface SchemaBuilder<T, K extends Kind = Kind> {
    readonly [SCHEMA]: JsonSchema;
    readonly [KIND]: K;
    readonly [VALUE]?: T;
    describe(text: string): SchemaBuilder<T, K>;
    label(text: string): SchemaBuilder<T, K>;
    nullable(): SchemaBuilder<T | null, "value">;
}
export type Infer<S> = S extends SchemaBuilder<infer T> ? T : never;
/** Returns a copy so callers cannot mutate the builder's validation contract. */
export declare function getSchema(builder: SchemaBuilder<unknown>): JsonSchema;
declare function string(): SchemaBuilder<string, "value">;
declare function number(): SchemaBuilder<number, "value">;
declare function integer(): SchemaBuilder<number, "value">;
declare function boolean(): SchemaBuilder<boolean, "value">;
declare function enumBuilder<const T extends string>(first: T, ...rest: T[]): SchemaBuilder<T, "value">;
declare function enumBuilder<const T extends number>(first: T, ...rest: T[]): SchemaBuilder<T, "value">;
declare function array<T>(items: SchemaBuilder<T>, options?: {
    minItems?: 0 | 1;
}): SchemaBuilder<T[], "value">;
declare function object<P extends Record<string, SchemaBuilder<unknown>>>(properties: P): SchemaBuilder<{
    -readonly [K in keyof P]: Infer<P[K]>;
}, "object">;
export declare const j: {
    string: typeof string;
    number: typeof number;
    integer: typeof integer;
    boolean: typeof boolean;
    enum: typeof enumBuilder;
    array: typeof array;
    object: typeof object;
    datetime: () => SchemaBuilder<string, "value">;
    date: () => SchemaBuilder<string, "value">;
    time: () => SchemaBuilder<string, "value">;
    duration: () => SchemaBuilder<string, "value">;
    email: () => SchemaBuilder<string, "value">;
    hostname: () => SchemaBuilder<string, "value">;
    ipv4: () => SchemaBuilder<string, "value">;
    ipv6: () => SchemaBuilder<string, "value">;
    uuid: () => SchemaBuilder<string, "value">;
};
export {};
//# sourceMappingURL=schema-builder.d.ts.map