import { type CompactNowInput, type CompactionResult } from '../../compaction/manual.js';
import type { SessionId } from '../../types/ids/index.js';
import { type SessionLocatorOptions } from './abandon-turn.js';
/** A compaction a host asks for between turns. */
export interface CompactSessionParams extends Omit<CompactNowInput, 'messages' | 'onShed'> {
    readonly sessionId: SessionId;
    /** Where to find the session's log, and the lease to append under. */
    readonly locator?: SessionLocatorOptions;
}
/**
 * Compact a session outside any turn. Reads the session's context from its
 * log, compacts it, and appends a `compaction{ trigger: 'manual' }` record
 * with no `turnId`: the messages the pass kept are named by id, the summary
 * is recorded in full, and the shed messages stay in the log for audit.
 *
 * Refused while a turn is active (`TurnInProgressError`). `null` when there
 * was nothing to compact; nothing is appended then.
 */
export declare function compactSession(params: CompactSessionParams): Promise<CompactionResult | null>;
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