import type { AgentMessage } from '@earendil-works/pi-agent-core';
import type { SideChatContextSnapshot, SideChatSelection } from './types.js';
export declare function validateSideChatSelections(value: unknown): SideChatSelection[];
export declare function createSideChatContextSnapshot(params: {
    parentSessionKey: string;
    parentSessionId: string;
    parentMessages: readonly AgentMessage[];
    selections: readonly SideChatSelection[];
    createdAt: string;
}): SideChatContextSnapshot;
export declare function formatSideChatSelections(selections: readonly SideChatSelection[]): string | null;