import type { ActivityEventV1, ActivityWorkIdentityV1 } from "#protocol/activity.js";
import type { UnstampedMessageStreamEvent } from "#protocol/message.js";
export declare function projectActivityEvents(input: {
    readonly at: string;
    readonly event: UnstampedMessageStreamEvent;
    readonly eventId?: string;
    readonly lineage: ActivityWorkIdentityV1;
}): readonly ActivityEventV1[];