import type { ContentBlock } from "@agentclientprotocol/sdk";
export declare const PROMPT_LIMITS: {
    blocks: number;
    image: number;
    total: number;
};
export interface NativePromptAttachment {
    kind: "image" | "pdf" | "file";
    filename: string;
    mimeType: string;
    sizeBytes: number;
    dataBase64?: string;
    localPath?: string;
}
/** Supplied embedded bytes are authoritative; URIs are names, not download instructions.
 * Successful staged files persist because native tools and resumed sessions may read them later.
 */
export declare function convertPromptContent(blocks: ContentBlock[], stagingDir: string): Promise<{
    text: string;
    attachments: NativePromptAttachment[];
}>;
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