/**
 * Barrel for all substrate adapters.
 *
 * Re-exports individual adapter functions and provides the unified
 * `getAllSubstrates()` function that merges results from all five databases
 * into a single BrainGraph.
 */
export { getAgentRegistrySubstrate } from './agent-registry.js';
export { getBrainSubstrate } from './brain.js';
export { getConduitSubstrate } from './conduit.js';
export { getNexusSubstrate } from './nexus.js';
export { getTasksSubstrate } from './tasks.js';
import type { BrainGraph, BrainQueryOptions } from '../types.js';
/**
 * Queries all five substrates and merges the results into a unified BrainGraph.
 *
 * When `options.substrates` is provided, only those substrates are queried.
 * Node IDs are substrate-prefixed, so deduplication is safe to perform
 * by ID equality alone.
 *
 * After all substrates are loaded, performs a second-pass stub-node load:
 * any edge target ID not yet in the loaded node set is fetched as a minimal
 * stub (id, substrate, kind, label). This recovers cross-substrate edges
 * that would otherwise be silently dropped.
 *
 * Stub nodes carry `meta.isStub: true` for optional UI differentiation.
 *
 * @param options - Query options forwarded to each substrate adapter.
 * @returns Merged BrainGraph across all requested substrates, with stub nodes for unresolved edge targets.
 */
export declare function getAllSubstrates(options?: BrainQueryOptions): BrainGraph;
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