import type { NodeBuilder } from 'three/webgpu';
/** Public structural surface accepted by `wgslFn(..., includes)`. */
export interface WGSLCodeInclude {
    build(builder: NodeBuilder): void;
}
/** Callable native-WGSL helper with a public, package-owned node contract. */
export interface WGSLNativeFunction<TParameters, TResult> extends WGSLCodeInclude {
    (parameters: TParameters): TResult;
}
export declare function isWGSLCodeInclude(value: unknown): value is WGSLCodeInclude;
/** Narrows the callable/code-node intersection omitted by r185's `wgslFn()` return type. */
export declare function requireWGSLCodeInclude(value: unknown): WGSLCodeInclude;
export declare function isWGSLNativeFunction<TParameters, TResult>(value: unknown): value is WGSLNativeFunction<TParameters, TResult>;
export declare function requireWGSLNativeFunction<TParameters, TResult>(value: unknown): WGSLNativeFunction<TParameters, TResult>;