diff --git a/packages/agent-graph/src/ui/GraphView.tsx b/packages/agent-graph/src/ui/GraphView.tsx
index 4dec015f..24c0f031 100644
--- a/packages/agent-graph/src/ui/GraphView.tsx
+++ b/packages/agent-graph/src/ui/GraphView.tsx
@@ -32,6 +32,12 @@ export interface GraphViewProps {
   onRequestClose?: () => void;
   onRequestPinAsTab?: () => void;
   onRequestFullscreen?: () => void;
+  /** Custom overlay renderer — replaces built-in GraphOverlay. Allows host app to reuse its own components. */
+  renderOverlay?: (props: {
+    node: GraphNode;
+    screenPos: { x: number; y: number };
+    onClose: () => void;
+  }) => React.ReactNode;
 }
 
 export function GraphView({
@@ -42,6 +48,7 @@ export function GraphView({
   onRequestClose,
   onRequestPinAsTab,
   onRequestFullscreen,
+  renderOverlay,
 }: GraphViewProps): React.JSX.Element {
   // ─── React state (user-facing only) ─────────────────────────────────────
   const [selectedNodeId, setSelectedNodeId] = useState<string | null>(null);
@@ -335,12 +342,29 @@ export function GraphView({
         isAlive={data.isAlive}
       />
 
-      <GraphOverlay
-        selectedNode={selectedNode}
-        worldToScreen={camera.worldToScreen}
-        events={events}
-        onDeselect={() => setSelectedNodeId(null)}
-      />
+      {selectedNode && renderOverlay ? (
+        <div
+          className="absolute z-20 pointer-events-auto"
+          style={{
+            left: `${camera.worldToScreen(selectedNode.x ?? 0, selectedNode.y ?? 0).x + 20}px`,
+            top: `${camera.worldToScreen(selectedNode.x ?? 0, selectedNode.y ?? 0).y - 20}px`,
+            transform: 'translateY(-50%)',
+          }}
+        >
+          {renderOverlay({
+            node: selectedNode,
+            screenPos: camera.worldToScreen(selectedNode.x ?? 0, selectedNode.y ?? 0),
+            onClose: () => setSelectedNodeId(null),
+          })}
+        </div>
+      ) : (
+        <GraphOverlay
+          selectedNode={selectedNode}
+          worldToScreen={camera.worldToScreen}
+          events={events}
+          onDeselect={() => setSelectedNodeId(null)}
+        />
+      )}
     </div>
   );
 }
diff --git a/src/renderer/features/agent-graph/ui/GraphNodePopover.tsx b/src/renderer/features/agent-graph/ui/GraphNodePopover.tsx
new file mode 100644
index 00000000..67996ce9
--- /dev/null
+++ b/src/renderer/features/agent-graph/ui/GraphNodePopover.tsx
@@ -0,0 +1,272 @@
+/**
+ * GraphNodePopover — renders popover for graph nodes using project UI components.
+ * Lives in features/ (not in package) so it CAN import from @renderer/.
+ * Reuses agentAvatarUrl, status helpers, and UI primitives from the project.
+ */
+
+import { Badge } from '@renderer/components/ui/badge';
+import { Button } from '@renderer/components/ui/button';
+import { agentAvatarUrl } from '@renderer/utils/memberHelpers';
+import { MessageSquare, ExternalLink, User } from 'lucide-react';
+
+import type { GraphNode } from '@claude-teams/agent-graph';
+
+interface GraphNodePopoverProps {
+  node: GraphNode;
+  onClose: () => void;
+  onSendMessage?: (memberName: string) => void;
+  onOpenTaskDetail?: (taskId: string) => void;
+  onOpenMemberProfile?: (memberName: string) => void;
+}
+
+export function GraphNodePopover({
+  node,
+  onClose,
+  onSendMessage,
+  onOpenTaskDetail,
+  onOpenMemberProfile,
+}: GraphNodePopoverProps): React.JSX.Element {
+  if (node.kind === 'member' || node.kind === 'lead') {
+    return (
+      <MemberPopoverContent
+        node={node}
+        onClose={onClose}
+        onSendMessage={onSendMessage}
+        onOpenProfile={onOpenMemberProfile}
+      />
+    );
+  }
+
+  if (node.kind === 'task') {
+    return <TaskPopoverContent node={node} onClose={onClose} onOpenDetail={onOpenTaskDetail} />;
+  }
+
+  // Process
+  return (
+    <div className="min-w-[180px] rounded-lg border border-[var(--color-border)] bg-[var(--color-surface-raised)] p-3 shadow-xl">
+      <div className="font-mono text-xs font-bold text-[var(--color-text)]">{node.label}</div>
+      {node.processUrl && (
+        <a
+          href={node.processUrl}
+          target="_blank"
+          rel="noreferrer"
+          className="mt-2 flex items-center gap-1 text-xs text-blue-400 hover:underline"
+        >
+          <ExternalLink size={12} /> Open URL
+        </a>
+      )}
+    </div>
+  );
+}
+
+// ─── Member Popover ─────────────────────────────────────────────────────────
+
+function MemberPopoverContent({
+  node,
+  onClose,
+  onSendMessage,
+  onOpenProfile,
+}: {
+  node: GraphNode;
+  onClose: () => void;
+  onSendMessage?: (name: string) => void;
+  onOpenProfile?: (name: string) => void;
+}): React.JSX.Element {
+  const memberName = node.domainRef.kind === 'member' ? node.domainRef.memberName : 'team-lead';
+  const avatarSrc = node.avatarUrl ?? agentAvatarUrl(memberName, 64);
+  const statusLabel =
+    node.state === 'active'
+      ? 'Active'
+      : node.state === 'idle'
+        ? 'Idle'
+        : node.state === 'terminated'
+          ? 'Offline'
+          : node.state;
+
+  const statusDotColor =
+    node.state === 'active' || node.state === 'thinking' || node.state === 'tool_calling'
+      ? 'bg-emerald-400'
+      : node.state === 'idle'
+        ? 'bg-zinc-400'
+        : node.state === 'error'
+          ? 'bg-red-400'
+          : 'bg-zinc-600';
+
+  return (
+    <div className="min-w-[200px] max-w-[280px] rounded-lg border border-[var(--color-border)] bg-[var(--color-surface-raised)] p-3 shadow-xl">
+      {/* Header: avatar + name */}
+      <div className="flex items-center gap-3">
+        <div className="relative shrink-0">
+          <img
+            src={avatarSrc}
+            alt={memberName}
+            className="size-10 rounded-full border border-[var(--color-border)]"
+          />
+          <div
+            className={`absolute -bottom-0.5 -right-0.5 size-3 rounded-full border-2 border-[var(--color-surface-raised)] ${statusDotColor}`}
+          />
+        </div>
+        <div className="min-w-0">
+          <div
+            className="truncate text-sm font-semibold text-[var(--color-text)]"
+            style={{ color: node.color }}
+          >
+            {node.label.split(' · ')[0]}
+          </div>
+          {node.role && (
+            <div className="truncate text-xs text-[var(--color-text-muted)]">{node.role}</div>
+          )}
+        </div>
+      </div>
+
+      {/* Status badges */}
+      <div className="mt-2 flex flex-wrap gap-1">
+        <Badge variant="outline" className="px-1.5 py-0 text-[10px]">
+          {statusLabel}
+        </Badge>
+        {node.kind === 'lead' && (
+          <Badge
+            variant="outline"
+            className="border-blue-500/30 px-1.5 py-0 text-[10px] text-blue-400"
+          >
+            Lead
+          </Badge>
+        )}
+        {node.spawnStatus && node.spawnStatus !== 'online' && (
+          <Badge
+            variant="outline"
+            className="border-amber-500/30 px-1.5 py-0 text-[10px] text-amber-400"
+          >
+            {node.spawnStatus}
+          </Badge>
+        )}
+      </div>
+
+      {/* Context usage for lead */}
+      {node.kind === 'lead' && node.contextUsage != null && node.contextUsage > 0 && (
+        <div className="mt-2">
+          <div className="flex items-center justify-between text-[10px] text-[var(--color-text-muted)]">
+            <span>Context</span>
+            <span>{Math.round(node.contextUsage * 100)}%</span>
+          </div>
+          <div className="mt-0.5 h-1 rounded-full bg-[var(--color-border)]">
+            <div
+              className="h-full rounded-full transition-all"
+              style={{
+                width: `${Math.min(100, node.contextUsage * 100)}%`,
+                background:
+                  node.contextUsage > 0.9
+                    ? '#ef4444'
+                    : node.contextUsage > 0.8
+                      ? '#f59e0b'
+                      : '#22c55e',
+              }}
+            />
+          </div>
+        </div>
+      )}
+
+      {/* Actions */}
+      <div className="mt-3 flex gap-1.5">
+        <Button
+          variant="outline"
+          size="sm"
+          className="h-7 gap-1 px-2 text-xs"
+          onClick={() => {
+            onSendMessage?.(memberName);
+            onClose();
+          }}
+        >
+          <MessageSquare size={12} /> Message
+        </Button>
+        <Button
+          variant="outline"
+          size="sm"
+          className="h-7 gap-1 px-2 text-xs"
+          onClick={() => {
+            onOpenProfile?.(memberName);
+            onClose();
+          }}
+        >
+          <User size={12} /> Profile
+        </Button>
+      </div>
+    </div>
+  );
+}
+
+// ─── Task Popover ───────────────────────────────────────────────────────────
+
+function TaskPopoverContent({
+  node,
+  onClose,
+  onOpenDetail,
+}: {
+  node: GraphNode;
+  onClose: () => void;
+  onOpenDetail?: (taskId: string) => void;
+}): React.JSX.Element {
+  const taskId = node.domainRef.kind === 'task' ? node.domainRef.taskId : '';
+
+  const statusColor =
+    node.taskStatus === 'in_progress'
+      ? 'text-blue-400 border-blue-500/30'
+      : node.taskStatus === 'completed'
+        ? 'text-emerald-400 border-emerald-500/30'
+        : 'text-zinc-400 border-zinc-500/30';
+
+  const reviewColor =
+    node.reviewState === 'review'
+      ? 'text-amber-400 border-amber-500/30'
+      : node.reviewState === 'needsFix'
+        ? 'text-red-400 border-red-500/30'
+        : node.reviewState === 'approved'
+          ? 'text-emerald-400 border-emerald-500/30'
+          : '';
+
+  return (
+    <div className="min-w-[200px] max-w-[280px] rounded-lg border border-[var(--color-border)] bg-[var(--color-surface-raised)] p-3 shadow-xl">
+      <div className="font-mono text-sm font-bold text-[var(--color-text)]">
+        {node.displayId ?? node.label}
+      </div>
+      {node.sublabel && (
+        <div className="mt-0.5 truncate text-xs text-[var(--color-text-muted)]">
+          {node.sublabel}
+        </div>
+      )}
+
+      <div className="mt-2 flex flex-wrap gap-1">
+        <Badge variant="outline" className={`px-1.5 py-0 text-[10px] ${statusColor}`}>
+          {node.taskStatus ?? 'pending'}
+        </Badge>
+        {node.reviewState && node.reviewState !== 'none' && (
+          <Badge variant="outline" className={`px-1.5 py-0 text-[10px] ${reviewColor}`}>
+            {node.reviewState}
+          </Badge>
+        )}
+        {node.needsClarification && (
+          <Badge
+            variant="outline"
+            className="border-red-500/30 px-1.5 py-0 text-[10px] text-red-400"
+          >
+            needs clarification
+          </Badge>
+        )}
+      </div>
+
+      <div className="mt-3">
+        <Button
+          variant="outline"
+          size="sm"
+          className="h-7 gap-1 px-2 text-xs"
+          onClick={() => {
+            onOpenDetail?.(taskId);
+            onClose();
+          }}
+        >
+          <ExternalLink size={12} /> Open task
+        </Button>
+      </div>
+    </div>
+  );
+}
diff --git a/src/renderer/features/agent-graph/ui/TeamGraphOverlay.tsx b/src/renderer/features/agent-graph/ui/TeamGraphOverlay.tsx
index 9a7afd7d..ac42d858 100644
--- a/src/renderer/features/agent-graph/ui/TeamGraphOverlay.tsx
+++ b/src/renderer/features/agent-graph/ui/TeamGraphOverlay.tsx
@@ -8,6 +8,7 @@ import { useCallback } from 'react';
 import { GraphView } from '@claude-teams/agent-graph';
 
 import { useTeamGraphAdapter } from '../adapters/useTeamGraphAdapter';
+import { GraphNodePopover } from './GraphNodePopover';
 
 import type { GraphDomainRef, GraphEventPort } from '@claude-teams/agent-graph';
 
@@ -60,6 +61,24 @@ export const TeamGraphOverlay = ({
         onRequestClose={onClose}
         onRequestPinAsTab={onPinAsTab}
         className="flex-1"
+        renderOverlay={({ node, onClose: closePopover }) => (
+          <GraphNodePopover
+            node={node}
+            onClose={closePopover}
+            onSendMessage={(name) => {
+              onSendMessage?.(name);
+              closePopover();
+            }}
+            onOpenTaskDetail={(id) => {
+              onOpenTaskDetail?.(id);
+              closePopover();
+            }}
+            onOpenMemberProfile={(name) => {
+              onOpenMemberProfile?.(name);
+              closePopover();
+            }}
+          />
+        )}
       />
     </div>
   );
diff --git a/src/renderer/features/agent-graph/ui/TeamGraphTab.tsx b/src/renderer/features/agent-graph/ui/TeamGraphTab.tsx
index 041bac55..ba1a0842 100644
--- a/src/renderer/features/agent-graph/ui/TeamGraphTab.tsx
+++ b/src/renderer/features/agent-graph/ui/TeamGraphTab.tsx
@@ -8,8 +8,9 @@ import { useCallback, useState, lazy, Suspense } from 'react';
 import { GraphView } from '@claude-teams/agent-graph';
 
 import { useTeamGraphAdapter } from '../adapters/useTeamGraphAdapter';
+import { GraphNodePopover } from './GraphNodePopover';
 
-import type { GraphDomainRef, GraphEventPort } from '@claude-teams/agent-graph';
+import type { GraphDomainRef, GraphEventPort, GraphNode } from '@claude-teams/agent-graph';
 
 const TeamGraphOverlay = lazy(() =>
   import('./TeamGraphOverlay').then((m) => ({ default: m.TeamGraphOverlay }))
@@ -72,6 +73,27 @@ export const TeamGraphTab = ({ teamName }: TeamGraphTabProps): React.JSX.Element
         events={events}
         className="size-full"
         onRequestFullscreen={() => setFullscreen(true)}
+        renderOverlay={({ node, onClose }) => (
+          <GraphNodePopover
+            node={node}
+            onClose={onClose}
+            onSendMessage={(name) =>
+              window.dispatchEvent(
+                new CustomEvent('graph:send-message', { detail: { teamName, memberName: name } })
+              )
+            }
+            onOpenTaskDetail={(id) =>
+              window.dispatchEvent(
+                new CustomEvent('graph:open-task', { detail: { teamName, taskId: id } })
+              )
+            }
+            onOpenMemberProfile={(name) =>
+              window.dispatchEvent(
+                new CustomEvent('graph:send-message', { detail: { teamName, memberName: name } })
+              )
+            }
+          />
+        )}
       />
       {fullscreen && (
         <Suspense fallback={null}>