import { type ByteSource, IOResult } from '../../../io/types.ts';
import { type Limit } from '../../../types.ts';
export declare function maybeWithTimeout(stream: ByteSource | null, limit: Limit | null, command: string): ByteSource | null;
export declare function runWithTimeout<T>(promise: Promise<T>, seconds: number | null, name: string): Promise<T>;
export declare function truncateStream(src: ByteSource, io: IOResult, limit: Limit): AsyncIterable<Uint8Array>;
export declare function applyLimit(src: ByteSource, limit: Limit | null): Promise<[ByteSource | null, IOResult]>;
/**
 * Apply output caps at a boundary and merge the outcome.
 *
 * The one boundary rule, shared by the command tree and the
 * whole-line runtimes: cap stdout, append the truncation notice to
 * stderr, and let an ERROR-mode guard override the exit code.
 */
export declare function guardOutput(stdout: ByteSource | null, stderr: ByteSource | null, exitCode: number, limit: Limit | null): Promise<[ByteSource | null, ByteSource | null, number]>;
export declare function applyOpLimit(result: unknown, limit: Limit | null): Promise<unknown>;
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