/**
 * searchBrain — SDK tool wrapping searchBrainCompact from memory/retrieval.
 *
 * Layer 1 of the 3-layer BRAIN retrieval pattern (search → timeline → fetch).
 * Returns compact index-level hits (~50 tokens/hit) for cheap candidate scanning.
 *
 * @arch SDK Tool (Category B) — pure-functional, contracts-typed, no I/O at top level
 * @task T10070
 * @epic T9835
 */
import type { SearchBrainInput, SearchBrainOutput } from '@cleocode/contracts';
import type { RegisteredSdkTool } from '../task-tools/sdk-tool.js';
/** Registered SDK tool for BRAIN compact search (Layer 1). */
export declare const searchBrain: RegisteredSdkTool<SearchBrainInput, Promise<SearchBrainOutput>>;
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