diff --git a/src/components/monitor/ActionGraph.tsx b/src/components/monitor/ActionGraph.tsx
index 67a7e65..091fcaa 100644
--- a/src/components/monitor/ActionGraph.tsx
+++ b/src/components/monitor/ActionGraph.tsx
@@ -10,11 +10,13 @@ import {
   type Edge,
   type NodeTypes,
   MarkerType,
+  ReactFlowProvider,
 } from '@xyflow/react'
 import '@xyflow/react/dist/style.css'
 import { SessionNode } from './SessionNode'
 import { ActionNode } from './ActionNode'
 import { CrabNode } from './CrabNode'
+import { ChaserCrab } from './ChaserCrab'
 import { layoutGraph } from '~/lib/graph-layout'
 import type { MonitorSession, MonitorAction } from '~/integrations/clawdbot'
 
@@ -34,7 +36,8 @@ const nodeTypes: NodeTypes = {
   crab: CrabNode as any,
 }
 
-export function ActionGraph({
+// Inner component that uses ReactFlow hooks
+function ActionGraphInner({
   sessions,
   actions,
   selectedSession,
@@ -178,6 +181,9 @@ export function ActionGraph({
   const [nodes, setNodes, onNodesChange] = useNodesState(layoutedNodes)
   const [edges, setEdges, onEdgesChange] = useEdgesState(layoutedEdges)
 
+  // Get node IDs for the chaser crab
+  const nodeIds = useMemo(() => nodes.map((n) => n.id), [nodes])
+
   // Update nodes when layout changes
   useEffect(() => {
     setNodes(layoutedNodes)
@@ -195,7 +201,7 @@ export function ActionGraph({
   )
 
   return (
-    <div className="w-full h-full bg-shell-950 texture-grid">
+    <div className="w-full h-full bg-shell-950 texture-grid relative">
       <ReactFlow
         nodes={nodes}
         edges={edges}
@@ -220,6 +226,17 @@ export function ActionGraph({
           maskColor="rgba(10, 10, 15, 0.8)"
         />
       </ReactFlow>
+      {/* Chaser crab overlay */}
+      <ChaserCrab nodeIds={nodeIds} />
     </div>
   )
 }
+
+// Wrapper that provides ReactFlowProvider
+export function ActionGraph(props: ActionGraphProps) {
+  return (
+    <ReactFlowProvider>
+      <ActionGraphInner {...props} />
+    </ReactFlowProvider>
+  )
+}
diff --git a/src/components/monitor/ChaserCrab.tsx b/src/components/monitor/ChaserCrab.tsx
new file mode 100644
index 0000000..bab51f2
--- /dev/null
+++ b/src/components/monitor/ChaserCrab.tsx
@@ -0,0 +1,153 @@
+import { useState, useEffect, useRef } from 'react'
+import { useReactFlow } from '@xyflow/react'
+import { CrabIdleAnimation, CrabJumpAnimation, CrabAttackAnimation } from '~/components/ani'
+
+type CrabState = 'idle' | 'running' | 'attacking'
+
+interface Position {
+  x: number
+  y: number
+}
+
+interface ChaserCrabProps {
+  nodeIds: string[]
+}
+
+const CRAB_SIZE = 20
+const CRAB_SPEED = 3 // pixels per frame
+const ATTACK_DISTANCE = 30 // how close before attacking
+const ATTACK_CHANCE = 0.4 // 40% chance to attack when close
+
+export function ChaserCrab({ nodeIds }: ChaserCrabProps) {
+  const { getNodes, getViewport } = useReactFlow()
+
+  const [position, setPosition] = useState<Position>({ x: 0, y: 0 })
+  const [target, setTarget] = useState<Position | null>(null)
+  const [crabState, setCrabState] = useState<CrabState>('idle')
+  const [facingLeft, setFacingLeft] = useState(false)
+
+  const prevNodeIdsRef = useRef<Set<string>>(new Set())
+  const animationFrameRef = useRef<number>(undefined)
+  const attackTimeoutRef = useRef<NodeJS.Timeout>(undefined)
+
+  // Detect new nodes and set them as targets
+  useEffect(() => {
+    const currentIds = new Set(nodeIds)
+    const prevIds = prevNodeIdsRef.current
+
+    // Find newly added nodes (excluding the central crab node)
+    for (const id of currentIds) {
+      if (!prevIds.has(id) && !id.includes('crab-origin')) {
+        // New node found! Get its position
+        const nodes = getNodes()
+        const newNode = nodes.find((n) => n.id === id)
+        if (newNode) {
+          const nodeCenter = {
+            x: newNode.position.x + 100, // Approximate center
+            y: newNode.position.y + 40,
+          }
+          setTarget(nodeCenter)
+          setCrabState('running')
+
+          // Clear any existing attack timeout
+          if (attackTimeoutRef.current) {
+            clearTimeout(attackTimeoutRef.current)
+          }
+        }
+        break // Only chase one new node at a time
+      }
+    }
+
+    prevNodeIdsRef.current = currentIds
+  }, [nodeIds, getNodes])
+
+  // Animation loop for movement
+  useEffect(() => {
+    if (!target || crabState === 'attacking') return
+
+    const animate = () => {
+      setPosition((current) => {
+        const dx = target.x - current.x
+        const dy = target.y - current.y
+        const distance = Math.sqrt(dx * dx + dy * dy)
+
+        // Check if we're close enough
+        if (distance < ATTACK_DISTANCE) {
+          // Randomly decide to attack or go idle
+          if (Math.random() < ATTACK_CHANCE) {
+            setCrabState('attacking')
+            // Return to idle after attack animation (4 frames at 10fps = 400ms)
+            attackTimeoutRef.current = setTimeout(() => {
+              setCrabState('idle')
+              setTarget(null)
+            }, 400)
+          } else {
+            setCrabState('idle')
+            setTarget(null)
+          }
+          return current
+        }
+
+        // Move towards target
+        const vx = (dx / distance) * CRAB_SPEED
+        const vy = (dy / distance) * CRAB_SPEED
+
+        // Update facing direction
+        if (Math.abs(vx) > 0.1) {
+          setFacingLeft(vx < 0)
+        }
+
+        return {
+          x: current.x + vx,
+          y: current.y + vy,
+        }
+      })
+
+      animationFrameRef.current = requestAnimationFrame(animate)
+    }
+
+    animationFrameRef.current = requestAnimationFrame(animate)
+
+    return () => {
+      if (animationFrameRef.current) {
+        cancelAnimationFrame(animationFrameRef.current)
+      }
+    }
+  }, [target, crabState])
+
+  // Cleanup on unmount
+  useEffect(() => {
+    return () => {
+      if (animationFrameRef.current) {
+        cancelAnimationFrame(animationFrameRef.current)
+      }
+      if (attackTimeoutRef.current) {
+        clearTimeout(attackTimeoutRef.current)
+      }
+    }
+  }, [])
+
+  // Get viewport for proper positioning
+  const viewport = getViewport()
+
+  // Transform crab position to screen coordinates
+  const screenX = position.x * viewport.zoom + viewport.x
+  const screenY = position.y * viewport.zoom + viewport.y
+
+  return (
+    <div
+      className="absolute pointer-events-none z-50 transition-transform"
+      style={{
+        left: screenX - CRAB_SIZE / 2,
+        top: screenY - CRAB_SIZE / 2,
+        width: CRAB_SIZE,
+        height: CRAB_SIZE,
+        transform: `scaleX(${facingLeft ? -1 : 1})`,
+      }}
+    >
+      {crabState === 'idle' && <CrabIdleAnimation className="w-full h-full" />}
+      {crabState === 'running' && <CrabJumpAnimation className="w-full h-full" />}
+      {crabState === 'attacking' && <CrabAttackAnimation className="w-full h-full" />}
+    </div>
+  )
+}