export declare function isInfrastructureOnlyRequestHeader(name: string): boolean;
export interface ApplicationRequestHeaderOptions {
    readonly denyHeaders?: readonly string[];
}
/** Copy only application-owned headers across the project-code boundary. */
export declare function createApplicationRequestHeaders(headers: Headers, options?: ApplicationRequestHeaderOptions): Headers;
/**
 * Detach a Request before exposing it to project-controlled code.
 *
 * Cloning first preserves the host-owned request body for later framework
 * processing while giving project code an independent header list.
 */
export declare function createApplicationRequest(request: Request, options?: ApplicationRequestHeaderOptions): Request;
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