import type { JsonValue } from "./part-field-access.js";
export declare function getToolPart(part: unknown): {
    toolCallId: string;
    toolName: string;
    input: Record<string, unknown>;
    state: string;
    output?: unknown;
    errorText?: string;
} | null;
export declare function getRawToolCallPart(part: unknown): {
    toolCallId: string;
    toolName: string;
    input: Record<string, unknown>;
    state?: string;
    output?: unknown;
    errorText?: string;
} | null;
export declare function getRawToolResultPart(part: unknown): {
    toolCallId: string;
    toolName?: string;
    output: {
        type: "json";
        value: JsonValue;
    } | {
        type: "error-text";
        value: string;
    };
} | null;
export declare function buildToolResultOutput(toolPart: {
    state: string;
    output?: unknown;
    errorText?: string;
}): {
    type: "json";
    value: JsonValue;
} | {
    type: "error-text";
    value: string;
} | null;
export declare function buildRawToolCallResultOutput(rawToolCall: NonNullable<ReturnType<typeof getRawToolCallPart>>): ReturnType<typeof buildToolResultOutput>;
export declare function hasSelfContainedRawToolCallResult(rawToolCall: NonNullable<ReturnType<typeof getRawToolCallPart>>): boolean;
/** Text-like provider message part. */
export interface TextPartLike {
    type: "text";
    text: string;
}
/** Reasoning-like provider message part. */
export interface ReasoningPartLike {
    type: "reasoning";
    text?: string;
    signature?: string;
    redactedData?: string;
}
/** Check whether a value is a text part. */
export declare function isTextPart(value: unknown): value is TextPartLike;
/** Check whether a value is a reasoning part. */
export declare function isReasoningPart(value: unknown): value is ReasoningPartLike;
export declare function isProviderVisibleReasoningPart(value: unknown): value is ReasoningPartLike;
export declare function getFilePart(part: unknown): {
    type: "file" | "image";
    mediaType: string;
    data: string;
    url: string;
    filename?: string;
    uploadId?: string;
    uploadPath?: string;
} | null;
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