import { BUILTIN, type BuiltinBrand } from "../types/brand.js";
/** Everything a builtin action / guard object carries besides the brand and the `type`. */
type BuiltinProps<T> = Omit<T, BuiltinBrand | "type">;
interface BuiltinShape {
    readonly [BUILTIN]: string;
    readonly type: string;
}
/**
 * Creates a builtin action / guard object the way XState does: a *function*
 * named like XState's inner function (`assign`, `raise`, ...) carrying the
 * `BUILTIN` brand, the XState `type` (`"xstate.assign"`, ...) and its payload
 * as own properties, frozen.
 *
 * A function (not a plain object) because TypeScript defers inference of a
 * nested generic call only when the callee returns a function type; see
 * `BuiltinCallable`. Calling the function throws: builtins are declarative.
 * `fn.name` matches XState so that `{ type: fn.name }` serialization (Stately
 * Inspector definition) renders identically.
 */
export declare function createBuiltin<T extends BuiltinShape>(brand: T[BuiltinBrand], name: string, type: T["type"], props: BuiltinProps<T>): T;
/** Brand check — the only way to tell a builtin from an inline action / guard function. */
export declare function isBuiltin(value: unknown): value is BuiltinShape;
export {};