/**
 * Add the upstream requests behind a tool result to its `meta.sources`
 * (see src/shared/request-context.ts).
 */
import type { SourceRecord } from "../shared/request-context.js";
/** Most sources listed per result; composite tools can make dozens of requests. */
export declare const MAX_SOURCES = 10;
/**
 * The result with `meta.sources` added: unique URLs, in request order, with
 * ISO fetch times and `cached: true` for cache hits. Results that aren't a
 * JSON object are returned unchanged.
 */
export declare function attachSources(result: unknown, sources: SourceRecord[], max?: number): unknown;
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