import * as z from "zod/v3";
import { Result as SafeParseResult } from "../../types/fp.js";
import { SDKValidationError } from "../errors/sdkvalidationerror.js";
/**
 * A `response.reasoning_summary_text.delta` server-sent event.
 */
export type ResponseReasoningSummaryTextDeltaStreamEvent = {
    /**
     * Incremental text or argument chunk.
     */
    delta: string;
    /**
     * ID of the output item this event refers to.
     */
    itemId: string;
    /**
     * Obfuscation padding accompanying the delta, when present.
     */
    obfuscation?: string | undefined;
    /**
     * Index of the output item in the response output array.
     */
    outputIndex: number;
    /**
     * Monotonically increasing sequence number for ordering events.
     */
    sequenceNumber: number;
    /**
     * Index of the reasoning summary part.
     */
    summaryIndex: number;
    /**
     * The event type. Discriminates the payload.
     */
    type: "response.reasoning_summary_text.delta";
    additionalProperties?: {
        [k: string]: any;
    } | undefined;
};
/** @internal */
export declare const ResponseReasoningSummaryTextDeltaStreamEvent$inboundSchema: z.ZodType<ResponseReasoningSummaryTextDeltaStreamEvent, z.ZodTypeDef, unknown>;
export declare function responseReasoningSummaryTextDeltaStreamEventFromJSON(jsonString: string): SafeParseResult<ResponseReasoningSummaryTextDeltaStreamEvent, SDKValidationError>;
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