/**
 * Nexus API contracts and ingestion bridge (T1569).
 *
 * Migrated from packages/cleo/src/dispatch/engines/nexus-engine.ts.
 * All five contract/ingestion functions live here:
 *   - nexusContractsSync  — extract and store HTTP/gRPC/topic contracts
 *   - nexusContractsShow  — compatibility matrix between two projects
 *   - nexusContractsLinkTasks — link contracts to tasks via git-log linker
 *   - nexusConduitScan    — link conduit messages to symbols
 *   - nexusTaskSymbols    — show symbols touched by a task
 *
 * Static imports replace the lazy `await import(... as string)` pattern.
 *
 * @task T1569
 * @task T1117
 */
import type { ContractCompatibilityMatrix, SymbolReference } from '@cleocode/contracts';
import { type EngineResult } from '../engine-result.js';
/**
 * Extract HTTP, gRPC, and topic contracts from a project and store them in nexus.db.
 *
 * @task T1569
 */
export declare function nexusContractsSync(projectId: string, repoPath: string): Promise<EngineResult<{
    projectId: string;
    repoPath: string;
    http: number;
    grpc: number;
    topic: number;
    totalCount: number;
}>>;
/**
 * Show contract compatibility matrix between two registered projects.
 *
 * @task T1569
 */
export declare function nexusContractsShow(projectAId: string, projectBId: string, projectRoot: string): Promise<EngineResult<ContractCompatibilityMatrix>>;
/**
 * Link extracted contracts to tasks via task_touches_symbol edges.
 *
 * @task T1569
 */
export declare function nexusContractsLinkTasks(projectId: string, repoPath: string): Promise<EngineResult<unknown>>;
/**
 * Scan conduit messages for symbol mentions and write conduit_mentions_symbol edges.
 *
 * @task T1569
 */
export declare function nexusConduitScan(projectRoot: string): Promise<EngineResult<{
    scanned: number;
    linked: number;
}>>;
/**
 * Show code symbols touched by a task via task_touches_symbol forward-lookup.
 *
 * @task T1569
 */
export declare function nexusTaskSymbols(taskId: string, projectRoot: string): Promise<EngineResult<{
    taskId: string;
    count: number;
    symbols: SymbolReference[];
}>>;
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