/**
 * `/recall` — cross-session search.
 *
 * Distinct from `/search`, which scans only the *current* session's
 * messages. `/recall` scans every saved session in the active scope
 * (project sessions under `<workspace>/.codeep/sessions/` when in a
 * project, else global `~/.codeep/sessions/`) and surfaces the ones
 * that match — ranked by how many query terms hit, boosted by recency.
 *
 * No FTS index / SQLite dependency: sessions are JSON files, and for
 * the realistic case (tens to low-hundreds of sessions) an in-memory
 * scan is fast and dependency-free. If a power user accumulates
 * thousands of sessions and this gets slow, the natural upgrade is a
 * cached FTS5 index — but that's premature today.
 */
import { type SessionInfo } from '../config/index.js';
export interface RecallMatch {
    session: SessionInfo;
    /** Composite relevance: term-hit count + recency boost. */
    score: number;
    /** Context snippet from the best-matching message. */
    snippet: string;
    /** How many messages in the session matched at least one term. */
    matchedMessages: number;
}
/**
 * Search saved sessions for the query. A session matches only if EVERY
 * query term appears somewhere in its non-system messages (AND
 * semantics — narrows results to genuinely relevant sessions rather
 * than any-term noise). Returns up to `limit` matches, best first.
 */
export declare function recallSessions(query: string, projectPath?: string, limit?: number): RecallMatch[];
/**
 * LLM-summarize what was accomplished across the matching sessions.
 * Loads each match's history, builds a compact multi-session transcript,
 * and asks the model for a short "here's what you did" paragraph. Used
 * by `/recall <query> --summarize`. Returns null on chat failure.
 */
export declare function summarizeRecall(query: string, matches: RecallMatch[], projectPath?: string): Promise<string | null>;
/** Render recall results as a Markdown block for TUI / ACP display. */
export declare function formatRecall(query: string, matches: RecallMatch[]): string;