feat(status): 24-hour activity sparklines on worker pulse cards

Each worker card on /status now renders a stacked-bar histogram of the
last 24 hourly buckets — successes from the bottom up in primary blue,
failures from the top down in destructive red, idle hours as a thin
baseline.  Heights normalise to the loudest hour in the series so quiet
workers still show shape.

- /api/status/workers: extended the response with activity24h per
  worker, computed via a generate_series CTE joined to analyzer_jobs /
  rmm_executions / sync_history (zero-fill so the 24-bucket shape is
  consistent regardless of activity).
- ActivitySparkline (components/status/activity-sparkline.tsx) — pure
  flex-end bar strip, no recharts dependency, 32px tall by default.
- WorkerPulse renders the strip below the in-flight / 1h tiles with
  "24h ago" / "now" labels.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

DESIGN.md

@@ -363,6 +363,10 @@ below is the working backlog; expand as we go.
       logged, ticket touch count).
 - [x] ~~Worker pulse section on `/status`~~ — analyzer / RMM / sync
       scheduler heartbeats via `/api/status/workers` and `WorkerPulse`.
+- [x] ~~Worker activity sparklines~~ — `ActivitySparkline` shows 24
+      hourly buckets per worker (success bottom-up in primary, failure
+      top-down in destructive). Backed by zero-filled hour series
+      generated in the `/api/status/workers` query.
 
 ### Tokens & theming
 - [-] Hard-coded Tailwind palette colors are extensive (~770 references)

app/api/status/workers/route.ts

@@ -3,33 +3,86 @@
  *   Heartbeat snapshot for the three in-process workers:
  *     • analyzer  — analyzer_jobs
  *     • rmm       — rmm_executions
- *     • sync      — sync_schedules / sync_history (proxy for the scheduler)
+ *     • sync      — sync_history (proxy for the scheduler; one row per
+ *                   triggered task)
  *
  *   For each: last activity timestamp, in-flight count, last-1h success/
- *   failure totals.  Cheap — just SELECT COUNT(*) FILTER queries. */
+ *   failure totals, and 24 hourly buckets of activity (success vs
+ *   failure counts) for sparkline rendering. */
 
 import { NextResponse } from 'next/server';
 import { requireAuth } from '@/lib/auth-utils';
 import postgresClient from '@/lib/services/postgres-client';
 
+export interface ActivityBucket {
+  /** Hour-truncated UTC timestamp. */
+  hour: string;
+  success: number;
+  failure: number;
+}
+
 export interface WorkerSnapshot {
   name: string;
   lastActivity: string | null;
   inFlight: number;
   oneHour: { success: number; failure: number };
+  activity24h: ActivityBucket[];
+}
+
+interface SnapshotRow {
+  last_activity: string | null;
+  in_flight: string;
+  ok_1h: string;
+  fail_1h: string;
+}
+
+interface BucketRow {
+  hour: string;
+  ok: string;
+  fail: string;
+}
+
+/**
+ * Build a 24-row series with zero-fill so the sparkline always has the
+ * same number of points (even when the worker is idle).  Generated as a
+ * date_trunc('hour') series joined to the source table's status histogram.
+ */
+function bucketsCte(table: string, statusCol: string, tsCol: string, okValues: string[], failValues: string[]) {
+  const okIn = okValues.map((v) => `'${v}'`).join(',');
+  const failIn = failValues.map((v) => `'${v}'`).join(',');
+  return `
+    WITH hours AS (
+      SELECT generate_series(
+        date_trunc('hour', NOW()) - INTERVAL '23 hours',
+        date_trunc('hour', NOW()),
+        INTERVAL '1 hour'
+      ) AS h
+    )
+    SELECT hours.h::text                                                              AS hour,
+           COALESCE(SUM(CASE WHEN ${statusCol} IN (${okIn})   THEN 1 ELSE 0 END), 0)::text AS ok,
+           COALESCE(SUM(CASE WHEN ${statusCol} IN (${failIn}) THEN 1 ELSE 0 END), 0)::text AS fail
+      FROM hours
+      LEFT JOIN ${table} t
+             ON date_trunc('hour', t.${tsCol}) = hours.h
+            AND t.${tsCol} >= NOW() - INTERVAL '24 hours'
+     GROUP BY hours.h
+     ORDER BY hours.h
+  `;
 }
 
 export async function GET() {
   const { error } = await requireAuth();
   if (error) return error;
 
-  const [analyzerRes, rmmRes, syncRes] = await Promise.all([
-    postgresClient.query<{
-      last_activity: string | null;
-      in_flight: string;
-      ok_1h: string;
-      fail_1h: string;
-    }>(
+  const [
+    analyzerRes,
+    analyzerBuckets,
+    rmmRes,
+    rmmBuckets,
+    syncRes,
+    syncBuckets,
+  ] = await Promise.all([
+    postgresClient.query<SnapshotRow>(
       `SELECT
          GREATEST(MAX(queued_at), MAX(started_at), MAX(finished_at))::text         AS last_activity,
          COUNT(*) FILTER (WHERE status IN ('queued','fetching','triaging','itglue','analyzing','deep_review'))::text AS in_flight,
@@ -37,12 +90,10 @@ export async function GET() {
          COUNT(*) FILTER (WHERE status = 'failed'   AND finished_at >= NOW() - INTERVAL '1 hour')::text AS fail_1h
        FROM analyzer_jobs`,
     ),
-    postgresClient.query<{
-      last_activity: string | null;
-      in_flight: string;
-      ok_1h: string;
-      fail_1h: string;
-    }>(
+    postgresClient.query<BucketRow>(
+      bucketsCte('analyzer_jobs', 'status', 'finished_at', ['complete'], ['failed']),
+    ),
+    postgresClient.query<SnapshotRow>(
       `SELECT
          GREATEST(MAX(queued_at), MAX(started_at), MAX(completed_at))::text       AS last_activity,
          COUNT(*) FILTER (WHERE status IN ('queued','running'))::text             AS in_flight,
@@ -50,11 +101,10 @@ export async function GET() {
          COUNT(*) FILTER (WHERE status IN ('failed','timeout') AND completed_at >= NOW() - INTERVAL '1 hour')::text AS fail_1h
        FROM rmm_executions`,
     ),
-    postgresClient.query<{
-      last_run: string | null;
-      ok_1h: string;
-      fail_1h: string;
-    }>(
+    postgresClient.query<BucketRow>(
+      bucketsCte('rmm_executions', 'status', 'completed_at', ['complete'], ['failed', 'timeout']),
+    ),
+    postgresClient.query<{ last_run: string | null; ok_1h: string; fail_1h: string }>(
       `SELECT
          MAX(last_run)::text                                                       AS last_run,
          COUNT(*) FILTER (WHERE last_status = 'success' AND last_run >= NOW() - INTERVAL '1 hour')::text AS ok_1h,
@@ -62,8 +112,18 @@ export async function GET() {
        FROM sync_schedules
        WHERE is_enabled = true`,
     ),
+    postgresClient.query<BucketRow>(
+      bucketsCte('sync_history', 'status', 'started_at', ['completed'], ['failed']),
+    ),
   ]);
 
+  const toBuckets = (rows: BucketRow[]): ActivityBucket[] =>
+    rows.map((r) => ({
+      hour: r.hour,
+      success: parseInt(r.ok, 10),
+      failure: parseInt(r.fail, 10),
+    }));
+
   const a = analyzerRes.rows[0];
   const r = rmmRes.rows[0];
   const s = syncRes.rows[0];
@@ -77,6 +137,7 @@ export async function GET() {
         success: parseInt(a?.ok_1h ?? '0', 10),
         failure: parseInt(a?.fail_1h ?? '0', 10),
       },
+      activity24h: toBuckets(analyzerBuckets.rows),
     },
     {
       name: 'RMM Overshell',
@@ -86,6 +147,7 @@ export async function GET() {
         success: parseInt(r?.ok_1h ?? '0', 10),
         failure: parseInt(r?.fail_1h ?? '0', 10),
       },
+      activity24h: toBuckets(rmmBuckets.rows),
     },
     {
       name: 'Sync scheduler',
@@ -95,6 +157,7 @@ export async function GET() {
         success: parseInt(s?.ok_1h ?? '0', 10),
         failure: parseInt(s?.fail_1h ?? '0', 10),
       },
+      activity24h: toBuckets(syncBuckets.rows),
     },
   ];
 

app/status/page.tsx

@@ -96,6 +96,7 @@ interface WorkerSnapshot {
   lastActivity: string | null;
   inFlight: number;
   oneHour: { success: number; failure: number };
+  activity24h?: Array<{ hour: string; success: number; failure: number }>;
 }
 
 interface WorkersResponse {

components/status/activity-sparkline.tsx

@@ -0,0 +1,91 @@
+/* ActivitySparkline — 24-bucket success/failure strip for a worker.
+ *
+ * Each column is one hour of activity.  Successes stack from the top
+ * down in brand blue; failures stack from the top down in destructive
+ * red over the success column so the worst hours read first.  Heights
+ * scale to the loudest hour in the series so a quiet worker still
+ * shows shape.
+ *
+ * No tooltip — hover-title gives the count.  At 24px tall this is a
+ * stacked bar histogram, not a line chart, so absolute counts read
+ * directly. */
+
+'use client';
+
+import { cn } from '@/lib/utils';
+
+interface ActivityBucket {
+  hour: string;
+  success: number;
+  failure: number;
+}
+
+interface ActivitySparklineProps {
+  data: ActivityBucket[];
+  className?: string;
+  height?: number;
+}
+
+function fmtHour(iso: string): string {
+  return new Date(iso).toLocaleTimeString(undefined, {
+    hour: 'numeric',
+    minute: '2-digit',
+  });
+}
+
+export function ActivitySparkline({
+  data,
+  className,
+  height = 32,
+}: ActivitySparklineProps) {
+  if (data.length === 0) {
+    return null;
+  }
+
+  const max = Math.max(1, ...data.map((d) => d.success + d.failure));
+
+  return (
+    <div className={cn('flex items-end gap-px w-full', className)} style={{ height }}>
+      {data.map((bucket, i) => {
+        const total = bucket.success + bucket.failure;
+        const totalPct = (total / max) * 100;
+        const failPct = total > 0 ? (bucket.failure / total) * 100 : 0;
+        const succPct = 100 - failPct;
+        const empty = total === 0;
+        return (
+          <span
+            key={bucket.hour}
+            title={
+              empty
+                ? `${fmtHour(bucket.hour)} · idle`
+                : `${fmtHour(bucket.hour)} · ${bucket.success} ok · ${bucket.failure} fail`
+            }
+            aria-label={`${fmtHour(bucket.hour)}: ${bucket.success} ok, ${bucket.failure} fail`}
+            className="relative flex-1 min-w-[1px] flex flex-col-reverse rounded-[1px] overflow-hidden"
+            style={{ height: `${empty ? 12 : Math.max(totalPct, 8)}%` }}
+            data-bucket-index={i}
+          >
+            {/* Success segment (bottom) */}
+            {bucket.success > 0 && (
+              <span
+                className="bg-primary/70"
+                style={{ height: `${succPct}%` }}
+              />
+            )}
+            {/* Failure segment (top) */}
+            {bucket.failure > 0 && (
+              <span
+                className="bg-destructive"
+                style={{ height: `${failPct}%` }}
+              />
+            )}
+            {/* Idle hour — render a thin baseline */}
+            {empty && (
+              <span className="bg-border/60 h-px self-end w-full" />
+            )}
+          </span>
+        );
+      })}
+    </div>
+  );
+}

components/status/worker-pulse.tsx

@@ -15,12 +15,20 @@
 
 import { Card, CardContent } from '@/components/ui/card';
 import { StatusLight, type StatusLightState } from '@/components/ui/status-light';
+import { ActivitySparkline } from '@/components/status/activity-sparkline';
+
+interface ActivityBucket {
+  hour: string;
+  success: number;
+  failure: number;
+}
 
 interface WorkerSnapshot {
   name: string;
   lastActivity: string | null;
   inFlight: number;
   oneHour: { success: number; failure: number };
+  activity24h?: ActivityBucket[];
 }
 
 interface WorkerPulseProps {
@@ -84,6 +92,16 @@ export function WorkerPulse({ worker, freshnessMinutes = 30 }: WorkerPulseProps)
           <Stat label="Fail · 1h" value={oneHour.failure} tone={oneHour.failure > 0 ? 'error' : 'default'} />
         </div>
 
+        {worker.activity24h && worker.activity24h.length > 0 && (
+          <div className="space-y-1">
+            <ActivitySparkline data={worker.activity24h} />
+            <div className="flex justify-between text-[10px] text-muted-foreground num">
+              <span>24h ago</span>
+              <span>now</span>
+            </div>
+          </div>
+        )}
+
         <p className="text-xs text-muted-foreground">
           Last activity <span className="num">{relTime(lastActivity)}</span>
         </p>