/**
 * BRAIN substrate adapter for the Living Brain API.
 *
 * Queries brain.db and returns BrainNodes/BrainEdges for all typed memory tables:
 * observations, decisions, patterns, learnings, plus the graph layer
 * (brain_page_nodes / brain_page_edges).
 *
 * Cross-substrate bridges are synthesized for:
 * - brain_page_edges whose to_id references a task (task:T-xxx → tasks:T-xxx)
 * - brain_page_edges whose to_id is a nexus-style path (foo.ts::Symbol → nexus:...)
 * - brain_memory_links rows (memory_type + memory_id → task_id link)
 * - brain_observations.files_modified_json (observation → nexus file path)
 *
 * Node IDs are prefixed with "brain:" to prevent collisions.
 */
import type { BrainEdge, BrainNode, BrainQueryOptions } from '../types.js';
/**
 * Returns all BrainNodes and BrainEdges sourced from brain.db.
 *
 * Pulls from all four typed memory tables plus brain_page_edges.
 * Emits intra-brain edges between loaded nodes, cross-substrate
 * brain→tasks bridges, cross-substrate brain→nexus bridges, and
 * brain_memory_links as cross-substrate edges.
 *
 * Applies `minWeight` filter where quality_score is available.
 * Node count is bounded by `limit / 5` to share budget with other substrates.
 *
 * @param options - Query options (limit, minWeight).
 * @returns Nodes and edges from the BRAIN substrate.
 */
export declare function getBrainSubstrate(options?: BrainQueryOptions): {
    nodes: BrainNode[];
    edges: BrainEdge[];
};
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