/**
 * Citation extraction and formatting helpers.
 *
 * Every tool that returns external content should produce
 * a structured `citations` array in its `details` so the
 * model (or a downstream UI) can render sources without
 * re-parsing prose.
 */
import type { Citation } from "../types.js";
/** Extract citations from MCP text payloads (Exa/DeepWiki format). */
export declare function extractCitationsFromMcpText(text: string, source: Citation["source"]): Citation[];
/** Format a citation block at the end of a tool result. */
export declare function formatCitationFooter(citations: Citation[]): string;
/** Best-effort de-duplication of citations by URL. */
export declare function dedupeCitations(citations: Citation[]): Citation[];
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