feat(studio): Trace Statistics

k8s/helm/README.md

@@ -1,6 +1,8 @@
 <!-- SPDX-FileCopyrightText: Copyright (c) 2025-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved. -->
 <!-- SPDX-License-Identifier: Apache-2.0 -->
 
+
+
 # NeMo Platform Helm Chart
 
 ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square)

web/packages/common/src/components/StatTile/index.tsx

@@ -2,6 +2,7 @@
 // SPDX-License-Identifier: Apache-2.0
 
 import { Flex, Panel, Stack, Text } from '@nvidia/foundations-react-core';
+import cn from 'classnames';
 import type { FC } from 'react';
 
 export type StatTileStatus = 'success' | 'warning' | 'error' | 'neutral';
@@ -13,6 +14,7 @@ export interface StatTileProps {
   trailingLabelStatus?: StatTileStatus;
   hint?: string;
   hintStatus?: StatTileStatus;
+  className?: string;
 }
 
 const MUTED_CLASS_NAME = 'text-placeholder';
@@ -31,8 +33,9 @@ export const StatTile: FC<StatTileProps> = ({
   trailingLabelStatus,
   hint,
   hintStatus,
+  className,
 }) => (
-  <Panel className="max-w-sm">
+  <Panel className={cn('max-w-sm', className)}>
     <Stack gap="density-sm">
       <Text kind="body/regular/sm" className={MUTED_CLASS_NAME}>
         {label}

web/packages/studio/src/components/AgentTraceStatistics/AgentTraceStatistics.stories.tsx

@@ -0,0 +1,152 @@
+// SPDX-FileCopyrightText: Copyright (c) 2025-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+import type { Meta, StoryObj } from '@storybook/react';
+import {
+  AgentTraceStatistics,
+  type AgentTraceStatisticsProps,
+} from '@studio/components/AgentTraceStatistics/index';
+import type {
+  TraceStatisticsRange,
+  TraceStatisticsSample,
+} from '@studio/components/AgentTraceStatistics/types';
+import { type FC, useState } from 'react';
+
+const ANCHOR = new Date('2026-07-01T00:00:00Z').getTime();
+const HOUR_MS = 60 * 60 * 1000;
+const DAY_MS = 24 * HOUR_MS;
+
+/** Deterministic LCG — fixtures must not change between story renders. */
+const makeRandom = (seed: number): (() => number) => {
+  let state = seed;
+  return () => {
+    state = (state * 1664525 + 1013904223) % 4294967296;
+    return state / 4294967296;
+  };
+};
+
+interface FixtureOptions {
+  buckets: number;
+  bucketMs: number;
+  tracesPerBucket?: number;
+  seed?: number;
+}
+
+/**
+ * Token counts swing on a slow sine so the chart shows the peaks and troughs of a real workload;
+ * latency and cost are derived from tokens with independent jitter.
+ */
+const makeTraces = ({
+  buckets,
+  bucketMs,
+  tracesPerBucket = 6,
+  seed = 42,
+}: FixtureOptions): TraceStatisticsSample[] => {
+  const random = makeRandom(seed);
+  const samples: TraceStatisticsSample[] = [];
+  const start = ANCHOR - (buckets - 1) * bucketMs;
+
+  for (let bucket = 0; bucket < buckets; bucket++) {
+    const wave = Math.sin(bucket / 1.7) * 0.5 + Math.sin(bucket / 5.3) * 0.5;
+    const baseTokens = 2200 + wave * 1300;
+    for (let i = 0; i < tracesPerBucket; i++) {
+      const totalTokens = Math.max(120, Math.round(baseTokens * (0.85 + random() * 0.3)));
+      const msPerToken = 0.045 + random() * 0.02;
+      samples.push({
+        startedAt: new Date(start + bucket * bucketMs + random() * bucketMs),
+        totalTokens,
+        durationMs: Math.round(totalTokens * msPerToken * 1000) / 1000,
+        costUsd: totalTokens * 0.0000032 * (0.9 + random() * 0.2),
+      });
+    }
+  }
+  return samples;
+};
+
+const MONTH_TRACES = makeTraces({ buckets: 31, bucketMs: DAY_MS });
+const WEEK_TRACES = makeTraces({ buckets: 7, bucketMs: DAY_MS, seed: 7 });
+const DAY_TRACES = makeTraces({ buckets: 24, bucketMs: HOUR_MS, tracesPerBucket: 3, seed: 11 });
+
+const TRACES_BY_RANGE: Record<TraceStatisticsRange, TraceStatisticsSample[]> = {
+  day: DAY_TRACES,
+  week: WEEK_TRACES,
+  month: MONTH_TRACES,
+};
+
+const meta: Meta<typeof AgentTraceStatistics> = {
+  component: AgentTraceStatistics,
+  title: 'Studio/AgentTraceStatistics',
+  args: {
+    range: 'month',
+    traces: MONTH_TRACES,
+    onRangeChange: () => {},
+    onViewTraces: () => {},
+  },
+  argTypes: {
+    range: { control: 'select', options: ['day', 'week', 'month'] },
+    chartHeight: { control: { type: 'range', min: 160, max: 600, step: 20 } },
+  },
+  decorators: [
+    (Story) => (
+      <div className="w-full max-w-[1200px] p-6">
+        <Story />
+      </div>
+    ),
+  ],
+};
+
+export default meta;
+
+type Story = StoryObj<typeof AgentTraceStatistics>;
+
+/** Stands in for the caller's refetch: changing the range swaps which fixture is passed in. */
+const RangeAwareStatistics: FC<AgentTraceStatisticsProps> = (props) => {
+  const [range, setRange] = useState<TraceStatisticsRange>(props.range);
+  return (
+    <AgentTraceStatistics
+      {...props}
+      range={range}
+      traces={TRACES_BY_RANGE[range]}
+      onRangeChange={setRange}
+    />
+  );
+};
+
+export const Default: Story = {
+  render: (args) => <RangeAwareStatistics {...args} />,
+};
+
+/** Hourly buckets — the tick formatter switches from dates to hours. */
+export const DayRange: Story = {
+  args: { range: 'day', traces: DAY_TRACES },
+};
+
+export const Loading: Story = {
+  args: { isPending: true, traces: [] },
+};
+
+/**
+ * First run: the tiles and chart give way to instructions, since four zeros and a blank grid tell
+ * the user nothing about how to get data.
+ */
+export const Empty: Story = {
+  args: {
+    traces: [],
+    onRunAgent: () => {},
+    onLearnMore: () => {},
+  },
+};
+
+/** Traces missing cost or token rollups still contribute what they have. */
+export const PartialRollups: Story = {
+  args: {
+    traces: MONTH_TRACES.map((trace, index) =>
+      index % 3 === 0 ? { ...trace, costUsd: null, totalTokens: null } : trace
+    ),
+  },
+};
+
+/** No `onViewTraces` hides the action — for surfaces that are already the traces list. */
+export const WithoutViewTracesAction: Story = {
+  args: { onViewTraces: undefined },
+};

web/packages/studio/src/components/AgentTraceStatistics/TraceStatisticsChart.tsx

@@ -0,0 +1,106 @@
+// SPDX-FileCopyrightText: Copyright (c) 2025-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+import { ComparisonLineChart } from '@nemo/common/src/components/ComparisonLineChart/index';
+import type {
+  ComparisonSeries,
+  ComparisonXValue,
+} from '@nemo/common/src/components/ComparisonLineChart/types';
+import { Card, Stack, Text } from '@nvidia/foundations-react-core';
+import type {
+  TraceStatisticsBucket,
+  TraceStatisticsRange,
+} from '@studio/components/AgentTraceStatistics/types';
+import {
+  bucketAdverbForRange,
+  formatBucketTick,
+  formatCostUsd,
+  formatLatencyMs,
+  formatTokens,
+} from '@studio/components/AgentTraceStatistics/utils';
+import { type FC, useMemo } from 'react';
+
+interface Props {
+  buckets: TraceStatisticsBucket[];
+  range: TraceStatisticsRange;
+  isPending?: boolean;
+  height?: number;
+}
+
+interface SeriesSpec {
+  id: string;
+  label: string;
+  color: string;
+  select: (bucket: TraceStatisticsBucket) => number | null;
+  format: (value: number) => string;
+}
+
+const SERIES: SeriesSpec[] = [
+  {
+    id: 'cost',
+    label: 'Cost',
+    color: 'var(--text-color-accent-green)',
+    select: (bucket) => bucket.costUsd,
+    format: formatCostUsd,
+  },
+  {
+    id: 'tokens',
+    label: 'Tokens',
+    color: 'var(--text-color-accent-blue)',
+    select: (bucket) => bucket.tokens,
+    format: formatTokens,
+  },
+  {
+    id: 'latency',
+    label: 'Latency',
+    color: 'var(--text-color-accent-yellow-strong)',
+    select: (bucket) => bucket.latencyMs,
+    format: formatLatencyMs,
+  },
+];
+
+const DEFAULT_HEIGHT = 320;
+
+const asDate = (value: ComparisonXValue): Date =>
+  value instanceof Date ? value : new Date(value as number);
+
+export const TraceStatisticsChart: FC<Props> = ({
+  buckets,
+  range,
+  isPending,
+  height = DEFAULT_HEIGHT,
+}) => {
+  const xAxis = useMemo(() => buckets.map((bucket) => new Date(bucket.timestamp)), [buckets]);
+
+  const series = useMemo<ComparisonSeries[]>(
+    () =>
+      SERIES.map((spec) => ({
+        id: spec.id,
+        label: spec.label,
+        color: spec.color,
+        data: buckets.map(spec.select),
+        valueFormatter: (value: number | null) => (value == null ? '—' : spec.format(value)),
+      })),
+    [buckets]
+  );
+
+  const formatXValue = (value: ComparisonXValue): string =>
+    formatBucketTick(asDate(value).getTime(), range);
+
+  return (
+    <Card>
+      <Stack padding="density-xl">
+        <ComparisonLineChart
+          title={<Text kind="title/sm">{`${bucketAdverbForRange(range)} averages over time`}</Text>}
+          series={series}
+          xAxis={xAxis}
+          height={height}
+          loading={isPending}
+          emptyMessage="No traces in this range"
+          formatXValue={formatXValue}
+          formatYValue={formatTokens}
+        />
+      </Stack>
+    </Card>
+  );
+};

web/packages/studio/src/components/AgentTraceStatistics/TraceStatisticsEmptyState.tsx

@@ -0,0 +1,51 @@
+// SPDX-FileCopyrightText: Copyright (c) 2025-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+import { Button, Card, Flex, StatusMessage } from '@nvidia/foundations-react-core';
+import { ChartNoAxesCombined, Play } from 'lucide-react';
+import { type FC } from 'react';
+
+interface Props {
+  /** Invoke the agent so it emits its first traces. */
+  onRunAgent?: () => void;
+  /** Widen the window — offered only when a longer one exists. */
+  onExpandRange?: () => void;
+  /** Docs on turning on tracing for an agent. */
+  onLearnMore?: () => void;
+}
+
+export const TraceStatisticsEmptyState: FC<Props> = ({
+  onRunAgent,
+  onExpandRange,
+  onLearnMore,
+}) => (
+  <Card>
+    <Flex justify="center" padding="density-2xl">
+      <StatusMessage
+        slotMedia={<ChartNoAxesCombined className="size-12 text-placeholder" />}
+        slotHeading="No traces yet"
+        slotSubheading={`Cost, token, and latency averages are built from instrumented agent runs — nothing has reported. Send the agent's traces to Intake, then invoke it to start filling this in.`}
+        slotFooter={
+          <Flex gap="density-sm" justify="center" wrap="wrap">
+            {onRunAgent ? (
+              <Button onClick={onRunAgent}>
+                <Play size={16} aria-hidden />
+                Run the agent
+              </Button>
+            ) : null}
+            {onLearnMore ? (
+              <Button kind="secondary" onClick={onLearnMore}>
+                Set up tracing
+              </Button>
+            ) : null}
+            {onExpandRange ? (
+              <Button kind="tertiary" onClick={onExpandRange}>
+                Look back a month
+              </Button>
+            ) : null}
+          </Flex>
+        }
+      />
+    </Flex>
+  </Card>
+);