diff --git a/ui/detection-app/src/panels/PipelineGraphPanel.vue b/ui/detection-app/src/panels/PipelineGraphPanel.vue
index 65bf0fb..b236ba6 100644
--- a/ui/detection-app/src/panels/PipelineGraphPanel.vue
+++ b/ui/detection-app/src/panels/PipelineGraphPanel.vue
@@ -1,7 +1,7 @@
 <script setup lang="ts">
-import { ref, watch } from 'vue'
+import { ref, watch, computed } from 'vue'
 import { Panel, GraphRenderer } from 'mpr-ui-framework'
-import type { GraphNode, DataSource } from 'mpr-ui-framework'
+import type { GraphNode, GraphMode, DataSource } from 'mpr-ui-framework'
 import { usePipelineStore } from '../stores/pipeline'
 import { useStageRegistry } from '../composables/useStageRegistry'
 
@@ -15,6 +15,13 @@ const { stageNames, editableStages } = useStageRegistry()
 
 const nodes = ref<GraphNode[]>([])
 
+// Derive graph mode from pipeline layout mode
+const graphMode = computed<GraphMode>(() => {
+  if (pipeline.layoutMode === 'bbox_editor') return 'edit-isolated'
+  if (pipeline.layoutMode === 'stage_editor') return 'edit-in-pipeline'
+  return 'observe'
+})
+
 // Initialize nodes from registry when it loads
 watch(stageNames, (names) => {
   if (names.length > 0 && nodes.value.length === 0) {
@@ -54,6 +61,8 @@ function onOpenStageEditor(stage: string) {
   <Panel title="Pipeline" :status="status">
     <GraphRenderer
       :nodes="nodes"
+      :mode="graphMode"
+      :active-stage="pipeline.editorStage"
       :region-stages="editableStages"
       @open-region-editor="onOpenRegionEditor"
       @open-stage-editor="onOpenStageEditor"
diff --git a/ui/framework/src/index.ts b/ui/framework/src/index.ts
index 8d97ff1..2ec6787 100644
--- a/ui/framework/src/index.ts
+++ b/ui/framework/src/index.ts
@@ -25,7 +25,7 @@ export { default as TableRenderer } from './renderers/TableRenderer.vue'
 // Renderer types
 export type { FrameBBox, FrameOverlay } from './renderers/FrameRenderer.vue'
 export type { LogEntry } from './renderers/LogRenderer.vue'
-export type { GraphNode } from './renderers/GraphRenderer.vue'
+export type { GraphNode, GraphMode } from './renderers/GraphRenderer.vue'
 export type { TableColumn } from './renderers/TableRenderer.vue'
 export type { TimeSeriesSeries } from './renderers/TimeSeriesRenderer.vue'
 
diff --git a/ui/framework/src/renderers/GraphRenderer.vue b/ui/framework/src/renderers/GraphRenderer.vue
index 9004573..9be629d 100644
--- a/ui/framework/src/renderers/GraphRenderer.vue
+++ b/ui/framework/src/renderers/GraphRenderer.vue
@@ -7,22 +7,38 @@ import '@vue-flow/core/dist/theme-default.css'
 export interface GraphNode {
   id: string
   status: 'pending' | 'running' | 'done' | 'error' | 'skipped'
+  /** Whether a checkpoint exists at this stage */
+  hasCheckpoint?: boolean
+  /** Stage category (e.g. 'cv', 'ai', 'preprocessing') */
+  category?: string
+  /** Which editors are available for this stage */
+  availableEditors?: string[]
 }
 
-const props = defineProps<{
+export type GraphMode = 'observe' | 'edit-in-pipeline' | 'edit-isolated'
+
+const props = withDefaults(defineProps<{
   nodes: GraphNode[]
+  /** Interaction mode — changes visual treatment and click behavior */
+  mode?: GraphMode
+  /** Currently edited stage (highlighted in edit modes) */
+  activeStage?: string | null
   /** Stages that have a region editor (bbox/polygon) */
   regionStages?: string[]
-}>()
+}>(), {
+  mode: 'observe',
+  activeStage: null,
+})
 
 const emit = defineEmits<{
   'open-region-editor': [stage: string]
   'open-stage-editor': [stage: string]
+  'node-click': [stage: string]
 }>()
 
 const regionStageSet = computed(() => new Set(props.regionStages ?? []))
 
-const statusColors: Record<string, string> = {
+const STATUS_COLORS: Record<string, string> = {
   pending: 'var(--status-idle)',
   running: 'var(--status-processing)',
   done: 'var(--status-live)',
@@ -30,35 +46,97 @@ const statusColors: Record<string, string> = {
   skipped: '#4a6fa5',
 }
 
+function nodeAppearance(node: GraphNode) {
+  const isActive = node.id === props.activeStage
+  const mode = props.mode
+
+  // Edit-isolated: only the active node is fully visible
+  if (mode === 'edit-isolated' && !isActive) {
+    return {
+      color: 'var(--surface-3)',
+      textColor: 'var(--text-dim)',
+      opacity: 0.5,
+      outline: false,
+    }
+  }
+
+  // Edit-in-pipeline: active node highlighted, upstream dimmed, downstream normal
+  if (mode === 'edit-in-pipeline' && props.activeStage) {
+    const activeIdx = props.nodes.findIndex(n => n.id === props.activeStage)
+    const nodeIdx = props.nodes.findIndex(n => n.id === node.id)
+
+    if (isActive) {
+      return {
+        color: 'var(--status-processing)',
+        textColor: '#fff',
+        opacity: 1,
+        outline: true,
+      }
+    }
+    if (nodeIdx < activeIdx) {
+      // Upstream: frozen from checkpoint
+      return {
+        color: 'var(--surface-3)',
+        textColor: 'var(--text-secondary)',
+        opacity: 0.7,
+        outline: false,
+      }
+    }
+  }
+
+  // Default: observe mode or downstream in edit-in-pipeline
+  return {
+    color: STATUS_COLORS[node.status] ?? STATUS_COLORS.pending,
+    textColor: '#fff',
+    opacity: 1,
+    outline: isActive,
+  }
+}
+
 const flowNodes = computed(() =>
-  props.nodes.map((n, i) => ({
-    id: n.id,
-    type: 'stage',
-    position: { x: 20, y: i * 80 },
-    data: {
-      label: n.id.replace(/_/g, ' '),
-      status: n.status,
-      color: statusColors[n.status] ?? statusColors.pending,
-      textColor: '#fff',
-      hasRegionEditor: regionStageSet.value.has(n.id),
-      isRunning: n.status === 'running',
-    },
-  }))
+  props.nodes.map((n, i) => {
+    const appearance = nodeAppearance(n)
+    return {
+      id: n.id,
+      type: 'stage',
+      position: { x: 20, y: i * 80 },
+      data: {
+        label: n.id.replace(/_/g, ' '),
+        status: n.status,
+        ...appearance,
+        hasCheckpoint: n.hasCheckpoint ?? false,
+        hasRegionEditor: regionStageSet.value.has(n.id),
+        hasEditors: (n.availableEditors?.length ?? 0) > 0,
+        isRunning: n.status === 'running',
+        isActive: n.id === props.activeStage,
+      },
+    }
+  })
 )
 
 const flowEdges = computed(() => {
   const edges = []
   for (let i = 0; i < props.nodes.length - 1; i++) {
+    const isActiveEdge = props.mode !== 'observe' && props.activeStage
+      && props.nodes.findIndex(n => n.id === props.activeStage) > i
+
     edges.push({
       id: `${props.nodes[i].id}->${props.nodes[i + 1].id}`,
       source: props.nodes[i].id,
       target: props.nodes[i + 1].id,
       animated: props.nodes[i].status === 'running',
-      style: { stroke: '#555568' },
+      style: {
+        stroke: isActiveEdge ? 'var(--text-dim)' : '#555568',
+        strokeDasharray: isActiveEdge ? '4 4' : undefined,
+      },
     })
   }
   return edges
 })
+
+function onNodeClick(id: string) {
+  emit('node-click', id)
+}
 </script>
 
 <template>
@@ -75,10 +153,29 @@ const flowEdges = computed(() => {
       <template #node-stage="{ data, id }">
         <div
           class="stage-node"
-          :class="{ running: data.isRunning }"
-          :style="{ background: data.color, color: data.textColor }"
+          :class="{
+            running: data.isRunning,
+            active: data.isActive,
+            outline: data.outline,
+            dimmed: data.opacity < 1,
+          }"
+          :style="{
+            background: data.color,
+            color: data.textColor,
+            opacity: data.opacity,
+          }"
+          @click="onNodeClick(id)"
         >
           <span class="stage-label">{{ data.label }}</span>
+
+          <!-- Checkpoint indicator -->
+          <span v-if="data.hasCheckpoint" class="checkpoint-badge" title="Checkpoint available">
+            <svg width="10" height="10" viewBox="0 0 10 10" fill="currentColor">
+              <circle cx="5" cy="5" r="3" fill="none" stroke="currentColor" stroke-width="1.5"/>
+              <circle cx="5" cy="5" r="1.5"/>
+            </svg>
+          </span>
+
           <span class="stage-actions">
             <button
               v-if="data.hasRegionEditor"
@@ -135,16 +232,32 @@ const flowEdges = computed(() => {
   font-size: var(--font-size-sm);
   font-weight: 600;
   min-width: 180px;
+  cursor: pointer;
+  transition: opacity 0.2s, box-shadow 0.2s;
 }
 
 .stage-node.running {
   animation: node-pulse 1.5s infinite;
 }
 
+.stage-node.outline {
+  box-shadow: 0 0 0 2px var(--status-processing);
+}
+
+.stage-node.dimmed {
+  pointer-events: none;
+}
+
 .stage-label {
   flex: 1;
 }
 
+.checkpoint-badge {
+  opacity: 0.7;
+  display: flex;
+  align-items: center;
+}
+
 .stage-actions {
   display: flex;
   gap: 2px;