/** Dual-path image attachment resolution for legacy rc.2 and modern DSH runtime blocks. */
import type { ImageAttachmentRef } from '@deepseek-ai/dsh-attachment';
export interface RunningToolCall {
    callId?: string;
    name?: string;
    argsRaw?: string;
    turn?: number;
    step?: number;
    time?: number;
}
export interface ToolResultNode {
    kind?: string;
    callId?: string;
    resultView?: {
        card?: string;
        content?: Array<{
            type: string;
            attachment?: ImageAttachmentRef;
        }>;
    } | null;
    content?: Array<{
        type: string;
        attachment?: ImageAttachmentRef;
    }>;
}
export type ToolCallBlock = RunningToolCall | ToolResultNode;
/**
 * Extract the verified durable image attachment from a completed tool result block.
 * Supports legacy rc.2 `resultView.content` and modern DSH `block.content`.
 */
export declare function imageRef(block: ToolCallBlock): ImageAttachmentRef | undefined;