Custom metrics feature

package.json

@@ -50,8 +50,10 @@
   "dependencies": {
     "@opentelemetry/api": "^1.9.0",
     "@opentelemetry/core": "^2.0.1",
+    "@opentelemetry/exporter-metrics-otlp-http": "^0.208.0",
     "@opentelemetry/otlp-transformer": "^0.211.0",
     "@opentelemetry/resources": "^2.0.1",
+    "@opentelemetry/sdk-metrics": "^2.0.1",
     "@opentelemetry/sdk-trace-base": "^2.0.1",
     "@traceloop/node-server-sdk": "^0.22.5",
     "axios": "^1.13.4",

src/api/dashboard/api.ts

@@ -9,6 +9,7 @@ import {
   ChartType,
   Dimension,
   FilterConfig,
+  Measure,
   Metrics,
   QueryDataParams,
   QueryResponse,
@@ -204,12 +205,24 @@ async getSessionStats(
   }
 
   private isValidMetrics(metrics: any): metrics is Metrics {
-    return (
+    const hasBaseShape =
       metrics &&
       typeof metrics === "object" &&
       "measure" in metrics &&
-      "aggregation" in metrics
-    );
+      "aggregation" in metrics;
+
+    if (!hasBaseShape) {
+      return false;
+    }
+
+    if (metrics.measure === Measure.CUSTOM) {
+      return (
+        typeof metrics.metricName === "string" &&
+        metrics.metricName.trim().length > 0
+      );
+    }
+
+    return true;
   }
 
   private isValidFilterConfig(filter: any): filter is FilterConfig {

src/api/dashboard/client.ts

@@ -43,6 +43,7 @@ export class DashboardHttpClient extends NetraHttpClient {
       metrics: {
         measure: metrics.measure,
         aggregation: metrics.aggregation,
+        ...(metrics.metricName ? { metricName: metrics.metricName } : {}),
       },
     };
 

src/api/dashboard/models.ts

@@ -26,6 +26,7 @@ export enum Measure {
   TOTAL_TOKENS = "Total Tokens",
   AUDIO_DURATION = "Audio Duration",
   CHARACTER_COUNT = "Character Count",
+  CUSTOM = "Custom",
 }
 
 export enum Aggregation {
@@ -133,6 +134,7 @@ export interface Filter {
 export interface Metrics {
   measure: Measure;
   aggregation: Aggregation;
+  metricName?: string;
 }
 
 export interface Dimension {