diff --git a/src/design-system/composites/EventFeed/EventFeed.module.css b/src/design-system/composites/EventFeed/EventFeed.module.css
new file mode 100644
index 0000000..a7a5e86
--- /dev/null
+++ b/src/design-system/composites/EventFeed/EventFeed.module.css
@@ -0,0 +1,108 @@
+.feed {
+  display: flex;
+  flex-direction: column;
+  height: 100%;
+  min-height: 0;
+}
+
+.filters {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 6px;
+  padding: 8px 12px;
+  border-bottom: 1px solid var(--border-subtle);
+  flex-shrink: 0;
+}
+
+.clearBtn {
+  background: none;
+  border: none;
+  color: var(--text-muted);
+  font-size: 11px;
+  cursor: pointer;
+  padding: 2px 6px;
+  border-radius: var(--radius-sm);
+  transition: color 0.1s;
+}
+
+.clearBtn:hover {
+  color: var(--text-primary);
+}
+
+.list {
+  flex: 1;
+  overflow-y: auto;
+  padding: 4px 0;
+}
+
+.item {
+  display: flex;
+  align-items: flex-start;
+  gap: 8px;
+  padding: 6px 12px;
+  transition: background 0.08s;
+  border-bottom: 1px solid var(--border-subtle);
+}
+
+.item:last-child {
+  border-bottom: none;
+}
+
+.item:hover {
+  background: var(--bg-hover);
+}
+
+.dot {
+  margin-top: 3px;
+  flex-shrink: 0;
+}
+
+.message {
+  flex: 1;
+  font-size: 12px;
+  color: var(--text-primary);
+  line-height: 1.5;
+  word-break: break-word;
+}
+
+/* Severity tint */
+.error .message {
+  color: var(--error);
+}
+
+.warning .message {
+  color: var(--warning);
+}
+
+.time {
+  font-family: var(--font-mono);
+  font-size: 10px;
+  color: var(--text-faint);
+  flex-shrink: 0;
+  margin-top: 2px;
+}
+
+.empty {
+  padding: 24px;
+  text-align: center;
+  color: var(--text-muted);
+  font-size: 12px;
+}
+
+.resumeBtn {
+  flex-shrink: 0;
+  padding: 6px;
+  background: var(--amber-bg);
+  border: 1px solid var(--amber-light);
+  border-radius: 0;
+  color: var(--amber-deep);
+  font-size: 11px;
+  font-family: var(--font-mono);
+  cursor: pointer;
+  text-align: center;
+  transition: background 0.1s;
+}
+
+.resumeBtn:hover {
+  background: var(--amber-light);
+}
diff --git a/src/design-system/composites/EventFeed/EventFeed.tsx b/src/design-system/composites/EventFeed/EventFeed.tsx
new file mode 100644
index 0000000..0d19821
--- /dev/null
+++ b/src/design-system/composites/EventFeed/EventFeed.tsx
@@ -0,0 +1,143 @@
+import { useEffect, useRef, useState, useCallback } from 'react'
+import styles from './EventFeed.module.css'
+import { StatusDot } from '../../primitives/StatusDot/StatusDot'
+import { FilterPill } from '../../primitives/FilterPill/FilterPill'
+
+export interface FeedEvent {
+  id: string
+  severity: 'error' | 'warning' | 'success' | 'running'
+  message: string
+  timestamp: Date
+}
+
+type SeverityFilter = 'error' | 'warning' | 'success' | 'running'
+
+interface EventFeedProps {
+  events: FeedEvent[]
+  maxItems?: number
+  className?: string
+}
+
+function formatRelativeTime(date: Date): string {
+  const now = Date.now()
+  const diff = now - date.getTime()
+  if (diff < 1000) return 'just now'
+  if (diff < 60_000) return `${Math.floor(diff / 1000)}s ago`
+  if (diff < 3_600_000) return `${Math.floor(diff / 60_000)}m ago`
+  if (diff < 86_400_000) return `${Math.floor(diff / 3_600_000)}h ago`
+  return date.toLocaleDateString()
+}
+
+const SEVERITY_LABELS: Record<SeverityFilter, string> = {
+  error: 'Error',
+  warning: 'Warning',
+  success: 'Success',
+  running: 'Info',
+}
+
+export function EventFeed({ events, maxItems = 200, className }: EventFeedProps) {
+  const scrollRef = useRef<HTMLDivElement>(null)
+  const [isPaused, setIsPaused] = useState(false)
+  const [activeFilters, setActiveFilters] = useState<Set<SeverityFilter>>(new Set())
+
+  const displayed = events
+    .slice(-maxItems)
+    .filter((e) => activeFilters.size === 0 || activeFilters.has(e.severity))
+
+  // Auto-scroll to bottom
+  const scrollToBottom = useCallback(() => {
+    const el = scrollRef.current
+    if (el) {
+      el.scrollTop = el.scrollHeight
+    }
+  }, [])
+
+  useEffect(() => {
+    if (!isPaused) {
+      scrollToBottom()
+    }
+  }, [events, isPaused, scrollToBottom])
+
+  function handleScroll() {
+    const el = scrollRef.current
+    if (!el) return
+    const atBottom = el.scrollHeight - el.scrollTop - el.clientHeight < 8
+    setIsPaused(!atBottom)
+  }
+
+  function toggleFilter(severity: SeverityFilter) {
+    setActiveFilters((prev) => {
+      const next = new Set(prev)
+      if (next.has(severity)) {
+        next.delete(severity)
+      } else {
+        next.add(severity)
+      }
+      return next
+    })
+  }
+
+  const allSeverities: SeverityFilter[] = ['error', 'warning', 'success', 'running']
+
+  return (
+    <div className={`${styles.feed} ${className ?? ''}`}>
+      {/* Filter pills */}
+      <div className={styles.filters}>
+        {allSeverities.map((sev) => {
+          const count = events.filter((e) => e.severity === sev).length
+          return (
+            <FilterPill
+              key={sev}
+              label={SEVERITY_LABELS[sev]}
+              count={count}
+              active={activeFilters.has(sev)}
+              onClick={() => toggleFilter(sev)}
+            />
+          )
+        })}
+        {activeFilters.size > 0 && (
+          <button
+            className={styles.clearBtn}
+            onClick={() => setActiveFilters(new Set())}
+          >
+            Clear
+          </button>
+        )}
+      </div>
+
+      {/* Event list */}
+      <div
+        ref={scrollRef}
+        className={styles.list}
+        onScroll={handleScroll}
+        aria-live="polite"
+        aria-label="Event feed"
+      >
+        {displayed.length === 0 ? (
+          <div className={styles.empty}>No events</div>
+        ) : (
+          displayed.map((event) => (
+            <div key={event.id} className={`${styles.item} ${styles[event.severity]}`}>
+              <StatusDot variant={event.severity} className={styles.dot} />
+              <span className={styles.message}>{event.message}</span>
+              <span className={styles.time}>{formatRelativeTime(event.timestamp)}</span>
+            </div>
+          ))
+        )}
+      </div>
+
+      {/* Pause indicator */}
+      {isPaused && (
+        <button
+          className={styles.resumeBtn}
+          onClick={() => {
+            setIsPaused(false)
+            scrollToBottom()
+          }}
+        >
+          ↓ Resume auto-scroll
+        </button>
+      )}
+    </div>
+  )
+}
diff --git a/src/design-system/composites/ProcessorTimeline/ProcessorTimeline.module.css b/src/design-system/composites/ProcessorTimeline/ProcessorTimeline.module.css
new file mode 100644
index 0000000..b1e0af4
--- /dev/null
+++ b/src/design-system/composites/ProcessorTimeline/ProcessorTimeline.module.css
@@ -0,0 +1,97 @@
+.timeline {
+  display: flex;
+  flex-direction: column;
+  gap: 5px;
+}
+
+.row {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  font-size: 11px;
+}
+
+.row.clickable {
+  cursor: pointer;
+  border-radius: var(--radius-sm);
+  padding: 2px 0;
+  transition: background 0.1s;
+}
+
+.row.clickable:hover {
+  background: var(--bg-hover);
+}
+
+.row.clickable:focus-visible {
+  outline: 2px solid var(--amber);
+  outline-offset: 2px;
+}
+
+.name {
+  width: 120px;
+  text-align: right;
+  color: var(--text-secondary);
+  font-family: var(--font-mono);
+  font-size: 10px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  flex-shrink: 0;
+}
+
+.barBg {
+  flex: 1;
+  height: 16px;
+  background: var(--bg-inset);
+  border-radius: 3px;
+  position: relative;
+  overflow: hidden;
+}
+
+.barFill {
+  position: absolute;
+  top: 0;
+  height: 100%;
+  border-radius: 3px;
+  display: flex;
+  align-items: center;
+  justify-content: flex-end;
+  padding-right: 5px;
+  min-width: 8px;
+  transition: opacity 0.1s;
+}
+
+.barLabel {
+  font-family: var(--font-mono);
+  font-size: 8px;
+  color: white;
+  font-weight: 500;
+}
+
+.ok {
+  background: rgba(61, 124, 71, 0.5);
+}
+
+.slow {
+  background: rgba(194, 117, 22, 0.5);
+}
+
+.fail {
+  background: rgba(192, 57, 43, 0.5);
+}
+
+.dur {
+  width: 42px;
+  font-family: var(--font-mono);
+  font-size: 10px;
+  color: var(--text-muted);
+  flex-shrink: 0;
+  text-align: right;
+}
+
+.empty {
+  color: var(--text-muted);
+  font-size: 12px;
+  padding: 16px;
+  text-align: center;
+}
diff --git a/src/design-system/composites/ProcessorTimeline/ProcessorTimeline.tsx b/src/design-system/composites/ProcessorTimeline/ProcessorTimeline.tsx
new file mode 100644
index 0000000..b1f58aa
--- /dev/null
+++ b/src/design-system/composites/ProcessorTimeline/ProcessorTimeline.tsx
@@ -0,0 +1,86 @@
+import styles from './ProcessorTimeline.module.css'
+
+export interface ProcessorStep {
+  name: string
+  type: string
+  durationMs: number
+  status: 'ok' | 'slow' | 'fail'
+  startMs: number
+}
+
+interface ProcessorTimelineProps {
+  processors: ProcessorStep[]
+  totalMs: number
+  onProcessorClick?: (processor: ProcessorStep) => void
+  className?: string
+}
+
+function formatDuration(ms: number): string {
+  if (ms >= 1000) return `${(ms / 1000).toFixed(2)}s`
+  return `${ms}ms`
+}
+
+export function ProcessorTimeline({
+  processors,
+  totalMs,
+  onProcessorClick,
+  className,
+}: ProcessorTimelineProps) {
+  const safeTotal = totalMs || 1
+
+  if (processors.length === 0) {
+    return (
+      <div className={`${styles.empty} ${className ?? ''}`}>No processor data</div>
+    )
+  }
+
+  return (
+    <div className={`${styles.timeline} ${className ?? ''}`}>
+      {processors.map((proc, i) => {
+        const leftPct = (proc.startMs / safeTotal) * 100
+        const widthPct = Math.max((proc.durationMs / safeTotal) * 100, 1)
+
+        const barClass = [
+          styles.barFill,
+          proc.status === 'ok' ? styles.ok : '',
+          proc.status === 'slow' ? styles.slow : '',
+          proc.status === 'fail' ? styles.fail : '',
+        ]
+          .filter(Boolean)
+          .join(' ')
+
+        return (
+          <div
+            key={i}
+            className={`${styles.row} ${onProcessorClick ? styles.clickable : ''}`}
+            onClick={() => onProcessorClick?.(proc)}
+            role={onProcessorClick ? 'button' : undefined}
+            tabIndex={onProcessorClick ? 0 : undefined}
+            onKeyDown={(e) => {
+              if (onProcessorClick && (e.key === 'Enter' || e.key === ' ')) {
+                e.preventDefault()
+                onProcessorClick(proc)
+              }
+            }}
+            aria-label={`${proc.name}: ${formatDuration(proc.durationMs)} (${proc.status})`}
+          >
+            <div className={styles.name} title={proc.name}>
+              {proc.name}
+            </div>
+            <div className={styles.barBg}>
+              <div
+                className={barClass}
+                style={{ left: `${leftPct}%`, width: `${widthPct}%` }}
+              >
+                {widthPct > 8 && (
+                  <span className={styles.barLabel}>{formatDuration(proc.durationMs)}</span>
+                )}
+              </div>
+            </div>
+            <div className={styles.dur}>{formatDuration(proc.durationMs)}</div>
+          </div>
+        )
+      })}
+    </div>
+  )
+}