/**
 * Shared metric definitions — single source of truth for all openclaw_lens_* metrics.
 *
 * This module is consumed by:
 *   - metrics-collector.ts   → OTel instrument name + description for meter.create*()
 *   - list-metrics.ts        → Prometheus name + type + help for OTLP metadata fallback
 *   - explain-metric.ts      → labels for drill-down breakdown suggestions
 *   - health-context.ts      → thresholds for SRE health evaluation
 *
 * Adding a new metric? Add it here and all four consumers pick it up automatically.
 *
 * Naming conventions:
 *   - OTel name: `openclaw_lens_<name>` (no _total suffix for counters)
 *   - Prometheus name: derived automatically — counters get `_total`, histograms expose _bucket/_count/_sum
 *   - Gauges: as-is
 */
/** Direction for health threshold evaluation. Canonical definition — re-exported by health-context.ts. */
export type HealthDirection = "higher_is_worse" | "lower_is_worse";
/** Prometheus metric type (matches OTel instrument type mapped to Prometheus conventions). */
export type PrometheusMetricType = "counter" | "gauge" | "histogram" | "unknown";
/** OTel instrument kind — determines how the instrument is created in metrics-collector. */
export type OtelInstrumentKind = "counter" | "histogram" | "updown_counter" | "observable_gauge";
export interface MetricDefinition {
    /** OTel instrument name (no _total suffix — OTel SDK appends it for counters in Prometheus export). */
    readonly otelName: string;
    /** Human-readable description (used as both OTel description and Prometheus HELP). */
    readonly help: string;
    /** OTel instrument kind. */
    readonly instrument: OtelInstrumentKind;
    /** Known label keys for drill-down suggestions (ordered by analytical importance). */
    readonly labels?: readonly string[];
    /** SRE health thresholds (only for gauge-type metrics). */
    readonly health?: {
        readonly warning: number;
        readonly critical: number;
        readonly direction: HealthDirection;
        /** Optional SRE-oriented description (richer than `help`). Falls back to `help` if omitted. */
        readonly description?: string;
    };
}
/** Derive the Prometheus metric type from the OTel instrument kind. */
export declare function prometheusType(kind: OtelInstrumentKind): PrometheusMetricType;
/**
 * Derive the Prometheus metric name from the OTel instrument name and kind.
 * Counters get `_total` appended (OTel→Prometheus convention).
 * Histograms and gauges keep their name as-is.
 */
export declare function prometheusName(def: MetricDefinition): string;
export declare const METRIC_DEFINITIONS: readonly MetricDefinition[];
/** Prometheus name → { type, help } — used by list-metrics.ts OTLP fallback. */
export declare const KNOWN_METRICS_MAP: ReadonlyMap<string, {
    type: PrometheusMetricType;
    help: string;
}>;
/** Prometheus name → string[] — used by explain-metric.ts for drill-down labels. */
export declare const KNOWN_BREAKDOWNS_MAP: Readonly<Record<string, string[]>>;
/** Prometheus name → health rule — used by health-context.ts for SRE thresholds. */
export declare const HEALTH_RULES_MAP: Readonly<Record<string, {
    warning: number;
    critical: number;
    description: string;
    direction: HealthDirection;
}>>;
/** OTel name → MetricDefinition — used by metrics-collector.ts for instrument creation. */
export declare const DEFINITIONS_BY_OTEL_NAME: ReadonlyMap<string, MetricDefinition>;