import type Anthropic from '@anthropic-ai/sdk';
import type { ContentPart, MessageContent, ToolModelOutput } from '@use-crux/core';
/** Canonical representation decoded from an Anthropic `tool_result` content payload. */
export interface DecodedAnthropicToolResultContent {
    /** Joined text blocks used as deterministic fallback content. */
    readonly text: string;
    /** Structured rich content when the Anthropic payload contained media blocks. */
    readonly modelOutput?: ToolModelOutput;
}
/**
 * Decode Anthropic `tool_result` content into canonical text and optional rich output.
 *
 * Text-only results keep their string fallback. Rich image/PDF blocks are
 * reconstructed as `ToolModelOutput` content so a `toMessages()` /
 * `fromMessages()` round trip does not flatten media.
 */
export declare function decodeAnthropicToolResultContent(content: Anthropic.ToolResultBlockParam['content']): DecodedAnthropicToolResultContent;
/** Decode one Anthropic image block source into canonical content. */
export declare function anthropicImageBlockToPart(source: Anthropic.ImageBlockParam['source']): ContentPart | undefined;
/** Decode one Anthropic document block into canonical content. */
export declare function anthropicDocumentBlockToPart(block: Anthropic.DocumentBlockParam): ContentPart | undefined;
/** Collapse text-only parts to string while preserving rich arrays. */
export declare function messageContentFromAnthropicParts(parts: readonly ContentPart[]): MessageContent;