/**
 * Context persistence - save and load conversation context between sessions
 */
import { Message } from '../config/index';
export interface ConversationContext {
    id: string;
    projectPath: string;
    projectName: string;
    createdAt: number;
    updatedAt: number;
    messages: Message[];
    summary?: string;
}
/**
 * Save conversation context for a project
 */
export declare function saveContext(projectPath: string, messages: Message[], summary?: string): boolean;
/**
 * Load conversation context for a project
 */
export declare function loadContext(projectPath: string): ConversationContext | null;
/**
 * Clear context for a project
 */
export declare function clearContext(projectPath: string): boolean;
/**
 * Get all saved contexts
 */
export declare function getAllContexts(): ConversationContext[];
/**
 * AI-powered compaction of a conversation history.
 *
 * Used by the `/compact` slash command. Sends the older portion of the
 * conversation to the active provider with a summarization prompt, then
 * replaces those messages with a single system message containing the
 * summary. Keeps the last `keepRecent` messages verbatim so the
 * conversation can continue without losing the most recent context.
 *
 * Returns the same `history` (untouched) if there isn't enough to
 * meaningfully compact.
 */
export declare function compactHistory(history: Message[], options?: {
    keepRecent?: number;
    projectContext?: import('./project').ProjectContext | null;
    /** Cap on how long the summarization API call can take, in ms. Defaults to 60s. */
    timeoutMs?: number;
    /** External abort signal (e.g. user pressed /stop). Combined with the timeout. */
    abortSignal?: AbortSignal;
}): Promise<{
    compacted: Message[];
    replaced: number;
    summary: string;
}>;
/**
 * Summarize messages for context persistence
 * Keeps recent messages and summarizes older ones
 */
export declare function summarizeContext(messages: Message[], maxMessages?: number): {
    messages: Message[];
    summary?: string;
};
/**
 * Merge loaded context with current conversation
 */
export declare function mergeContext(loaded: ConversationContext | null, currentMessages: Message[]): Message[];
/**
 * Format context info for display
 */
export declare function formatContextInfo(context: ConversationContext): string;
/**
 * Clear all contexts
 */
export declare function clearAllContexts(): number;