import type { ToolResultBlock, ToolResultContent } from './index.js';
/**
 * Normalize tool-result content to blocks.
 *
 * A plain string is the common case and stays first-class; this is the
 * adapter for drivers that want to walk blocks uniformly.
 */
export declare function toToolResultBlocks(content: ToolResultContent): readonly ToolResultBlock[];
/**
 * Flatten tool-result content to text.
 *
 * For drivers that cannot express non-text tool results, and for every
 * host-facing surface (transcript, compaction, UI) that reasons over
 * strings. Non-text blocks become a short, honest placeholder rather than
 * their base64 payload: dumping the bytes is what made `computer-use`
 * send megabytes of undecodable characters as text, and silently dropping
 * them would let the model believe it saw something it did not.
 */
export declare function toolResultToText(content: ToolResultContent): string;
/** True when the content needs a driver that can carry non-text blocks. */
export declare function hasNonTextBlocks(content: ToolResultContent): boolean;
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