import type { EveMessage, EveMessagePart } from "#client/message-reducer-types.js";
type EveAssistantMessage = EveMessage & {
    readonly role: "assistant";
};
type EveRunPart = Extract<EveMessagePart, {
    readonly type: "text" | "reasoning";
}>;
declare function transition(message: EveAssistantMessage, input: {
    readonly stepIndex: number;
    readonly type: EveRunPart["type"];
    readonly id?: string;
} & ({
    readonly kind: "append";
    readonly delta: string;
} | {
    readonly kind: "complete";
    readonly text: string;
})): EveAssistantMessage;
export declare const messageRun: {
    readonly transition: typeof transition;
};
export {};