/**
 * Diagnostics Engine Operations — business logic layer.
 *
 * Contains all diagnostics domain EngineResult wrappers migrated from
 * `packages/cleo/src/dispatch/engines/diagnostics-engine.ts` (ENG-MIG-13 / T1580).
 *
 * Wraps the telemetry primitives in `@cleocode/core/telemetry` with typed
 * EngineResult returns so the CLI dispatch layer can call them directly.
 *
 * Importable from `@cleocode/core/internal` so the CLI dispatch layer can
 * call them without any intermediate engine file.
 *
 * @module diagnostics/engine-ops
 * @task T1580 — ENG-MIG-13
 * @epic T1566
 */
import { type EngineResult } from '../engine-result.js';
/**
 * Enable telemetry collection.
 *
 * Generates a stable anonymous UUID on first call; preserves it on
 * subsequent calls (idempotent).
 *
 * @returns EngineResult with enabled status, anonymousId, and paths
 * @task T1580 — ENG-MIG-13
 */
export declare function diagnosticsEnable(): Promise<EngineResult<{
    enabled: true;
    anonymousId: string;
    dbPath: string;
    configPath: string;
    message: string;
}>>;
/**
 * Disable telemetry collection.
 *
 * Existing data in telemetry.db is preserved for historical analysis.
 *
 * @returns EngineResult with disabled status and confirmation message
 * @task T1580 — ENG-MIG-13
 */
export declare function diagnosticsDisable(): Promise<EngineResult<{
    enabled: false;
    message: string;
}>>;
/**
 * Return current telemetry config and paths.
 *
 * @returns EngineResult with enabled flag, anonymousId, and file paths
 * @task T1580 — ENG-MIG-13
 */
export declare function diagnosticsStatus(): Promise<EngineResult<{
    enabled: boolean;
    anonymousId: string;
    dbPath: string;
    configPath: string;
}>>;
/**
 * Build a diagnostics report and push high-signal patterns to BRAIN.
 *
 * Requires telemetry to be enabled. Optionally suppresses BRAIN write with
 * `pushToBrain = false`.
 *
 * @param days - Number of days to analyze (default: 30)
 * @param pushToBrain - Whether to write observations to BRAIN memory (default: true)
 * @returns EngineResult with the diagnostics report and BRAIN observation count
 * @task T1580 — ENG-MIG-13
 */
export declare function diagnosticsAnalyze(days?: number, pushToBrain?: boolean): Promise<EngineResult<Record<string, unknown>>>;
/**
 * Export all telemetry events as a JSON array for external analysis.
 *
 * Requires telemetry to be enabled. Optionally limit to the last N days.
 *
 * @param days - Number of days to include (optional; defaults to all time)
 * @returns EngineResult with events array, count, and export timestamp
 * @task T1580 — ENG-MIG-13
 */
export declare function diagnosticsExport(days?: number): Promise<EngineResult<{
    events: unknown[];
    count: number;
    exportedAt: string;
}>>;
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