/**
 * Thread Lifecycle Manager ()
 *
 * Core logic for thread lifecycle management:
 * - ID generation, migration from plain strings to ThreadObject
 * - Aggregation across sessions (replaces aggregateOpenThreads)
 * - Resolution by ID or text match
 * - Local file persistence (.gitmem/threads.json)
 */
import type { ThreadObject } from "../types/index.js";
/**
 * Generate a thread ID: "t-" + 8 hex chars
 */
export declare function generateThreadId(): string;
/**
 * Migrate a plain string thread to a ThreadObject.
 */
export declare function migrateStringThread(text: string, sourceSession?: string): ThreadObject;
/**
 * Normalize a mixed array of strings and ThreadObjects into ThreadObject[].
 * Handles backward compatibility with existing plain string threads.
 */
export declare function normalizeThreads(raw: (string | ThreadObject)[], sourceSession?: string): ThreadObject[];
interface SessionRecord {
    id: string;
    session_date: string;
    open_threads?: (string | ThreadObject)[];
    close_compliance?: Record<string, unknown> | null;
}
interface AggregateResult {
    open: ThreadObject[];
    recently_resolved: ThreadObject[];
}
/**
 * Aggregate threads across recent closed sessions.
 * Replaces the old aggregateOpenThreads() function.
 *
 * Returns:
 * - open: deduplicated open threads
 * - recently_resolved: threads resolved in the most recent session
 */
export declare function aggregateThreads(sessions: SessionRecord[], maxSessions?: number, maxAgeDays?: number): AggregateResult;
/**
 * Find a thread by exact ID.
 */
export declare function findThreadById(threads: ThreadObject[], id: string): ThreadObject | null;
/**
 * Find a thread by case-insensitive substring match on text.
 * Returns the first match.
 */
export declare function findThreadByText(threads: ThreadObject[], query: string): ThreadObject | null;
/**
 * Resolve a thread in a list. Returns the resolved thread or null if not found.
 * Mutates the thread object in place.
 */
export declare function resolveThread(threads: ThreadObject[], options: {
    threadId?: string;
    textMatch?: string;
    sessionId?: string;
    resolutionNote?: string;
}): ThreadObject | null;
/**
 * Load threads from .gitmem/threads.json.
 * Returns empty array if file doesn't exist or is invalid.
 */
export declare function loadThreadsFile(): ThreadObject[];
/**
 * Save threads to .gitmem/threads.json.
 */
export declare function saveThreadsFile(threads: ThreadObject[]): void;
/**
 * Merge two thread lists, preferring resolved state.
 * Used to merge session-close payload with mid-session resolutions.
 */
export declare function mergeThreadStates(incoming: ThreadObject[], current: ThreadObject[]): ThreadObject[];
export {};
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