import type { ByteSource } from '../io/types.ts';
import type { CommandSpec, FlagValue } from './spec/types.ts';
export declare const COMPOUND_EXTENSIONS: ReadonlySet<string>;
export declare function getExtension(path: string | null): string | null;
export declare function materializeStdout(stdout: ByteSource | null): Promise<Uint8Array>;
export declare function stripPrefixFromPathKwargs(kwargs: Record<string, FlagValue>, spec: CommandSpec, prefix: string): Record<string, FlagValue>;
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