import type { BaseAgentConfig } from '../types/agent/base.js';
import type { ChildSessionStorage } from '../types/agent/task.js';
/**
 * What an agent tells the children it delegates to about where their
 * sessions live.
 *
 * A session held in memory (an {@link InMemorySessionLog} and no `paths`)
 * hands that choice down, with its checkpoint store when it named one, so a
 * child does not fall back to a disk log under `NAMZU_HOME` its parent never
 * asked for.
 *
 * A session on disk hands down its layout: the `paths` it named or, with no
 * log and no `paths`, the default layout for its working directory — the one
 * its own log resolves to. Its children's logs then nest under its session
 * directory, with their meta documents, however deep the delegation goes.
 *
 * A host log of its own with no `paths` says nothing: its layout is not
 * known, and each child resolves its own storage from its config.
 */
export declare function childSessionStorage(config: Pick<BaseAgentConfig, 'sessionLog' | 'paths' | 'checkpointStore'>, workingDirectory?: string): Promise<ChildSessionStorage | undefined>;
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