/** Content-block structure helpers. @module @deepseek-ai/dsh-llm/content */
import type { ContentBlock } from './types.ts';
/**
 * True when typed model content contains an image block, walking nested
 * tool-result content. This is the one recursive image walk shared by every
 * image policy (capability gating, text-only serialization, compaction
 * survey), so a consumer cannot silently diverge on nesting depth.
 * @param content - typed model content blocks.
 * @returns whether any nested block is an image.
 */
export declare function contentHasImage(content: readonly ContentBlock[]): boolean;
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