import type TamboAI from "@tambo-ai/typescript-sdk";
/**
 * Narrow a value to a ChatCompletionContentPart by checking for an object with string `type`.
 * We purposefully keep this guard permissive to support future part types.
 * @returns true if the value looks like a content part
 */
export declare function isContentPart(val: unknown): val is TamboAI.Beta.Threads.ChatCompletionContentPart;
/**
 * Type guard for arrays of content parts.
 * @returns true if the value is an array of content parts
 */
export declare function isContentPartArray(val: unknown): val is TamboAI.Beta.Threads.ChatCompletionContentPart[];
/**
 * Safely convert an unknown value to a string suitable for a `{ type: "text" }` content part.
 * Guarantees a string and avoids throwing on circular structures.
 * @returns The string representation of the value
 */
export declare function toText(val: unknown): string;
//# sourceMappingURL=content-parts.d.ts.map