/**
 * timelineBrain — SDK tool wrapping timelineBrain from memory/retrieval.
 *
 * Layer 2 of the 3-layer BRAIN retrieval pattern (search → timeline → fetch).
 * Surfaces chronological neighbors around an anchor entry for context reconstruction.
 *
 * @arch SDK Tool (Category B) — pure-functional, contracts-typed, no I/O at top level
 * @task T10070
 * @epic T9835
 */
import type { TimelineBrainInput, TimelineBrainOutput } from '@cleocode/contracts';
import type { RegisteredSdkTool } from '../task-tools/sdk-tool.js';
/** Registered SDK tool for BRAIN chronological timeline (Layer 2). */
export declare const timelineBrain: RegisteredSdkTool<TimelineBrainInput, Promise<TimelineBrainOutput>>;
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