diff --git a/web/src/components/AgentStatusBadge.svelte b/web/src/components/AgentStatusBadge.svelte
new file mode 100644
index 0000000..b4cc4c7
--- /dev/null
+++ b/web/src/components/AgentStatusBadge.svelte
@@ -0,0 +1,114 @@
+<script lang="ts">
+  /**
+   * AgentStatusBadge component.
+   * Displays a colored badge with agent ID (truncated) and status indicator.
+   * Shows pulsing/animated indicators based on agent status.
+   */
+
+  type Props = {
+    agentId: string;
+    status: string;
+  };
+
+  let { agentId, status }: Props = $props();
+
+  /**
+   * Get background color based on status.
+   */
+  function getStatusColor(st: string): string {
+    switch (st) {
+      case 'spawning':
+      case 'initializing':
+        return '#3b82f6'; // blue
+      case 'working':
+        return '#10b981'; // green
+      case 'reporting':
+        return '#eab308'; // yellow
+      case 'completed':
+        return '#10b981'; // green
+      case 'failed':
+        return '#ef4444'; // red
+      default:
+        return '#6b7280'; // gray
+    }
+  }
+
+  /**
+   * Determine if status should have animation.
+   */
+  function hasAnimation(st: string): boolean {
+    return st === 'spawning' || st === 'initializing' || st === 'working';
+  }
+
+  /**
+   * Truncate agent ID to last 6 characters.
+   */
+  function truncateId(id: string): string {
+    return id.length > 6 ? id.slice(-6) : id;
+  }
+
+  const bgColor = $derived(getStatusColor(status));
+  const isAnimated = $derived(hasAnimation(status));
+  const displayId = $derived(truncateId(agentId));
+</script>
+
+<div class="badge-wrapper">
+  <span class="status-badge" class:animated={isAnimated} style="background-color: {bgColor}">
+    <span class="status-dot"></span>
+    <span class="agent-id">{displayId}</span>
+    <span class="status-text">{status}</span>
+  </span>
+</div>
+
+<style>
+  .badge-wrapper {
+    display: inline-flex;
+    margin-right: 0.5rem;
+  }
+
+  .status-badge {
+    display: inline-flex;
+    align-items: center;
+    gap: 0.5rem;
+    padding: 0.375rem 0.75rem;
+    border-radius: 9999px;
+    font-size: 0.875rem;
+    font-weight: 500;
+    color: white;
+    white-space: nowrap;
+  }
+
+  .status-dot {
+    display: inline-block;
+    width: 0.5rem;
+    height: 0.5rem;
+    border-radius: 50%;
+    background-color: currentColor;
+    opacity: 0.8;
+  }
+
+  .status-badge.animated .status-dot {
+    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
+  }
+
+  .agent-id {
+    font-family: monospace;
+    font-size: 0.75rem;
+    opacity: 0.9;
+  }
+
+  .status-text {
+    font-size: 0.75rem;
+    opacity: 0.85;
+  }
+
+  @keyframes pulse {
+    0%,
+    100% {
+      opacity: 1;
+    }
+    50% {
+      opacity: 0.5;
+    }
+  }
+</style>