/**
 * log10x_customer_metrics_query — low-level PromQL passthrough to the
 * customer metric backend.
 *
 * This is the agent's escape hatch. Most cross-pillar investigations go
 * through the composable primitives (metrics_that_moved,
 * rank_by_shape_similarity, metric_overlay), but exposing a pure
 * passthrough ensures the agent is never blocked on "the tool doesn't
 * support the metric I need."
 *
 * Returns the raw Prometheus response shape plus an `execution` block
 * identifying which backend served the query.
 *
 * Tier prerequisite: LOG10X_CUSTOMER_METRICS_URL configured.
 * This tool issues exactly 1 PromQL query against the customer backend.
 */
import { z } from 'zod';
import { type StructuredOutput } from '../lib/output-types.js';
export declare const customerMetricsQuerySchema: {
    promql: z.ZodString;
    mode: z.ZodDefault<z.ZodEnum<["instant", "range"]>>;
    start: z.ZodOptional<z.ZodString>;
    end: z.ZodOptional<z.ZodString>;
    step: z.ZodOptional<z.ZodString>;
};
export declare function executeCustomerMetricsQuery(args: {
    promql: string;
    mode: 'instant' | 'range';
    start?: string;
    end?: string;
    step?: string;
}): Promise<string | StructuredOutput>;