feat(widgets): add Description tab to LoraInfoWidget with dual-mode rendering support

- Add Notes/Description tab switching with tab state persistence in widget value
- Lazy-load model description and version description from /lm/loras/metadata
- Render CivitAI HTML descriptions inline via v-html
- Auto-fetch description when LoRA selection changes while on Description tab
- Fix Vue mode height containment via contain:layout size (lm-vue-node class)
- Fix scroll wheel isolation: widget scroll vs canvas zoom in both render modes
- Add docs/comfyui-dual-mode-widgets.md with widget rendering patterns

AGENTS.md

@@ -102,6 +102,7 @@ npm run test:coverage       # Generate coverage report
 - ComfyUI: `app.registerExtension()`, `node.addDOMWidget(name, type, element, options)`
 - Event handlers via `addEventListener` or widget callbacks
 - Shared utilities: `web/comfyui/utils.js`
+- Dual-mode rendering patterns (canvas vs Vue): see `docs/comfyui-dual-mode-widgets.md`
 
 ### Vue Composables Pattern
 

docs/comfyui-dual-mode-widgets.md

@@ -0,0 +1,65 @@
+# ComfyUI Dual-Mode Widget Rendering
+
+ComfyUI custom node widgets render in one of two modes. Patterns that work in one often fail silently in the other. Test both.
+
+## Mode Detection
+
+```js
+typeof LiteGraph !== 'undefined' && LiteGraph.vueNodesMode
+```
+
+In Vue SFCs, `window.LiteGraph` is unavailable — pass as a prop from `main.ts`.
+
+## Canvas Mode Layout
+
+Uses `computeLayoutSize()` + `distributeSpace()` to allocate widget height within the node. Widgets with `computeLayoutSize` participate in space distribution; those with `computeSize` have fixed height.
+
+- `getMinHeight()` in `addDOMWidget` options → minimum widget height
+- `widget.computeLayoutSize()` → `{ minHeight, minWidth, maxHeight? }`
+- Avoid `getMaxHeight()` unless the widget genuinely needs a fixed cap (prevents user resize)
+
+## Vue Mode Layout
+
+Uses CSS Grid (`grid-template-rows`) + `ResizeObserver`. The ResizeObserver watches the widget's DOM and feeds back into grid row sizing. This creates a feedback loop: content grows → row resizes → more space for content → content reflows/grows → row resizes again.
+
+### Height Containment
+
+The fix: `contain: layout size` on the widget root. This tells the browser the element's intrinsic size is CSS-determined, not driven by descendant content. The ResizeObserver sees a stable size and the loop is broken.
+
+```css
+.widget-root.lm-vue-node {
+  height: 100%;
+  min-height: var(--comfy-widget-min-height, 200px);
+  contain: layout size;
+}
+```
+
+Existing examples: `.lm-loras-container.lm-vue-node` and `.comfy-tags-container.lm-vue-node` in `web/comfyui/lm_styles.css`.
+
+**Do NOT** fix height issues with `maxHeight`, `getMaxHeight()`, or inline `max-height` — these prevent the user from resizing the node.
+
+## Scroll Wheel Isolation
+
+Both modes need to distinguish "user wants to scroll widget content" from "user wants to zoom canvas".
+
+**Canvas mode:** Add `@wheel` on widget root. Check `event.target.closest(selector)` for scrollable sub-areas. If scrollable → `event.stopPropagation()`. Otherwise → `app.canvas.processMouseWheel(event)`.
+
+**Vue mode:** Add CSS class `lm-wheel-scrollable` to scrollable elements. The global capture-phase hook in `web/comfyui/utils.js` (`enableListWheelScroll`) detects wheel events on marked elements and manually scrolls them via `element.scrollTop`, consuming the event before canvas zoom sees it.
+
+## DOM Structure
+
+`main.ts` creates an outer `<div>` container, then `vueApp.mount(container)`. The Vue app renders its own root element inside.
+
+- `container.id` / `container.style.*` → outer element
+- Vue scoped `<style>` → `[data-v-hash]` applies only to Vue root
+
+Classes needed by scoped Vue CSS must go on the Vue root element. Pass data as props and bind with `:class` rather than manipulating the DOM from `main.ts`.
+
+## Serialization
+
+For stateful widgets that need workflow persistence:
+
+- `serialize: true` in `addDOMWidget` options
+- `serializeValue()` → state snapshot (called on workflow save)
+- `onSetValue(v)` → restore state (called on workflow load)
+- Always handle missing keys in restored value for backward compatibility with old workflows

vue-widgets/src/components/LoraInfoWidget.vue

@@ -1,6 +1,37 @@
 <template>
-  <div class="lora-info-widget">
+  <div class="lora-info-widget" :class="{ 'lm-vue-node': isVueMode }" @wheel="onWheel">
     <template v-if="loraName">
+      <!-- Tab bar -->
+      <div class="lora-info-tabs">
+        <label
+          class="lora-info-tab"
+          :class="{ active: activeTab === 'notes' }"
+        >
+          <input
+            type="radio"
+            v-model="activeTab"
+            value="notes"
+            class="lora-info-tab-input"
+          />
+          <span class="lora-info-tab-label">Notes</span>
+        </label>
+        <label
+          class="lora-info-tab"
+          :class="{ active: activeTab === 'description' }"
+        >
+          <input
+            type="radio"
+            v-model="activeTab"
+            value="description"
+            class="lora-info-tab-input"
+            @change="onDescriptionTabActivated"
+          />
+          <span class="lora-info-tab-label">Description</span>
+        </label>
+      </div>
+
+      <!-- Notes tab content -->
+      <div v-show="activeTab === 'notes'" class="tab-content notes-tab">
         <div class="info-field">
           <label class="info-label">Filename</label>
           <div class="lora-filename">{{ loraName }}</div>
@@ -9,7 +40,7 @@
           <label class="info-label">Notes</label>
           <textarea
             v-model="notes"
-          class="lora-notes"
+            class="lora-notes lm-wheel-scrollable"
             placeholder="Add notes about this LoRA..."
             :disabled="saving"
           ></textarea>
@@ -21,20 +52,60 @@
         >
           {{ saving ? 'Saving...' : 'Save' }}
         </button>
+      </div>
+
+      <!-- Description tab content -->
+      <div v-show="activeTab === 'description'" class="tab-content description-tab lm-wheel-scrollable">
+        <!-- Loading state -->
+        <div v-if="descriptionLoading" class="description-state">
+          <i class="fas fa-spinner fa-spin"></i>
+          <span>Loading description...</span>
+        </div>
+
+        <!-- Error state -->
+        <div v-else-if="descriptionError" class="description-state error">
+          <span>Failed to load description</span>
+        </div>
+
+        <!-- Empty state (loaded but no content) -->
+        <div v-else-if="!hasDescription" class="description-state placeholder">
+          <span>No description available</span>
+        </div>
+
+        <!-- Description content -->
+        <div v-else class="description-content">
+          <div v-if="versionDescription" class="description-section">
+            <label class="info-label">About this version</label>
+            <div class="description-text" v-html="versionDescription"></div>
+          </div>
+          <div v-if="modelDescription" class="description-section">
+            <label class="info-label">Model Description</label>
+            <div class="description-text" v-html="modelDescription"></div>
+          </div>
+        </div>
+      </div>
     </template>
     <div v-else class="placeholder">No LoRA selected</div>
   </div>
 </template>
 
 <script setup lang="ts">
-import { onMounted, ref } from 'vue'
+import { onMounted, ref, computed, watch } from 'vue'
 
 interface LoraInfoWidget {
   serializeValue?: () => Promise<unknown>
   value?: unknown
   onSetValue?: (v: unknown) => void
   callback?: unknown
-  _setLoraInfo?: (data: { name: string; notes: string; filePath: string }) => void
+  _setLoraInfo?: (data: { name: string; notes: string; filePath: string; activeTab?: string } | null) => void
+  __pendingLoraInfo?: { name: string; notes: string; filePath: string; activeTab?: string } | null
+}
+
+interface LoraInfoWidgetValue {
+  name?: string
+  notes?: string
+  filePath?: string
+  activeTab?: string
 }
 
 const props = defineProps<{
@@ -42,6 +113,7 @@ const props = defineProps<{
   node: { id: number }
   api: { fetchApi: (url: string, options?: RequestInit) => Promise<Response> }
   app: { extensionManager: { toast: { add: (opts: Record<string, unknown>) => void } } }
+  isVueMode?: boolean
 }>()
 
 const loraName = ref<string>('')
@@ -49,6 +121,69 @@ const notes = ref<string>('')
 const originalNotes = ref<string>('')
 const filePath = ref<string>('')
 const saving = ref<boolean>(false)
+const activeTab = ref<string>('notes')
+
+// Description tab state
+const versionDescription = ref<string>('')
+const modelDescription = ref<string>('')
+const descriptionLoading = ref<boolean>(false)
+const descriptionError = ref<boolean>(false)
+const descriptionLoaded = ref<boolean>(false)
+
+const hasDescription = computed(() =>
+  !!(versionDescription.value || modelDescription.value)
+)
+
+// Reset and auto-fetch description state when the LoRA selection changes
+watch(filePath, (newPath) => {
+  descriptionLoaded.value = false
+  descriptionError.value = false
+  versionDescription.value = ''
+  modelDescription.value = ''
+  if (newPath && activeTab.value === 'description') {
+    fetchDescription()
+  }
+})
+
+function onDescriptionTabActivated() {
+  if (!descriptionLoaded.value && filePath.value) {
+    fetchDescription()
+  }
+}
+
+async function fetchDescription() {
+  if (descriptionLoading.value || !filePath.value) return
+
+  descriptionLoading.value = true
+  descriptionError.value = false
+
+  try {
+    const response = await props.api.fetchApi(
+      `/lm/loras/metadata?file_path=${encodeURIComponent(filePath.value)}`,
+      { method: 'GET' }
+    )
+
+    if (!response.ok) {
+      throw new Error(`Failed to fetch metadata: ${response.statusText}`)
+    }
+
+    const data = await response.json()
+    if (data.success && data.metadata) {
+      versionDescription.value = data.metadata.description || ''
+      modelDescription.value = data.metadata.model?.description || ''
+      descriptionLoaded.value = true
+    } else {
+      // Successful response but no metadata — treat as empty, not error
+      descriptionLoaded.value = true
+    }
+  } catch (e) {
+    console.error('[LoraInfoWidget] Failed to fetch description:', e)
+    descriptionError.value = true
+    // Don't set descriptionLoaded — allow retry on next tab switch
+  } finally {
+    descriptionLoading.value = false
+  }
+}
 
 async function saveNotes() {
   if (notes.value === originalNotes.value || saving.value) return
@@ -91,47 +226,99 @@ async function saveNotes() {
   }
 }
 
+function onWheel(event: WheelEvent) {
+  const target = event.target as HTMLElement | null
+  if (!target) return
+
+  const comfyApp = (window as unknown as { app?: { canvas?: { processMouseWheel?: (e: WheelEvent) => void } } }).app
+  if (!comfyApp?.canvas?.processMouseWheel) return
+
+  // Always pass pinch-to-zoom to canvas
+  if (event.ctrlKey) {
+    event.preventDefault()
+    event.stopPropagation()
+    comfyApp.canvas.processMouseWheel(event)
+    return
+  }
+
+  // Horizontal scroll: pass to canvas
+  if (Math.abs(event.deltaX) > Math.abs(event.deltaY)) {
+    event.preventDefault()
+    event.stopPropagation()
+    comfyApp.canvas.processMouseWheel(event)
+    return
+  }
+
+  // Check if the target is inside a scrollable area (notes textarea or description tab)
+  const scrollableEl = target.closest('.lora-notes, .description-tab') as HTMLElement | null
+  if (scrollableEl) {
+    const canScrollY = scrollableEl.scrollHeight > scrollableEl.clientHeight
+    if (canScrollY) {
+      // Let native scroll handle it, but stop propagation to prevent canvas zoom
+      event.stopPropagation()
+      return
+    }
+  }
+
+  // Forward to canvas for zoom
+  event.preventDefault()
+  event.stopPropagation()
+  comfyApp.canvas.processMouseWheel(event)
+}
+
 onMounted(() => {
-  // Display-only widget - return null on serialization to avoid saving to workflow
+  // Persist tab state along with other widget data
-  props.widget.serializeValue = async () => null
+  props.widget.serializeValue = async (): Promise<LoraInfoWidgetValue> => ({
+    name: loraName.value,
+    notes: notes.value,
+    filePath: filePath.value,
+    activeTab: activeTab.value,
+  })
 
   // Handle external value updates (e.g., loading workflow, paste)
   props.widget.onSetValue = (v: unknown) => {
     if (v && typeof v === 'object') {
-      const data = v as { name?: string; notes?: string; filePath?: string }
+      const data = v as LoraInfoWidgetValue
       if (data.name !== undefined) loraName.value = data.name
       if (data.notes !== undefined) {
         notes.value = data.notes
         originalNotes.value = data.notes
       }
       if (data.filePath !== undefined) filePath.value = data.filePath
+      if (data.activeTab !== undefined) activeTab.value = data.activeTab
     }
   }
 
   // Restore from saved value if exists (for workflow loading)
   if (props.widget.value && typeof props.widget.value === 'object') {
-    const data = props.widget.value as { name?: string; notes?: string; filePath?: string }
+    const data = props.widget.value as LoraInfoWidgetValue
     if (data.name !== undefined) loraName.value = data.name
     if (data.notes !== undefined) {
       notes.value = data.notes
       originalNotes.value = data.notes
     }
     if (data.filePath !== undefined) filePath.value = data.filePath
+    if (data.activeTab !== undefined) activeTab.value = data.activeTab
   }
 
   // Expose setLoraInfo on the widget object for external callers (e.g., lora_info.js).
   // Accepts null to clear the display (when selection is deselected).
-  props.widget._setLoraInfo = (data: { name: string; notes: string; filePath: string } | null) => {
+  props.widget._setLoraInfo = (data: { name: string; notes: string; filePath: string; activeTab?: string } | null) => {
     if (data) {
       loraName.value = data.name
       notes.value = data.notes
       originalNotes.value = data.notes
       filePath.value = data.filePath
+      // Preserve existing activeTab unless explicitly provided
+      if (data.activeTab !== undefined) {
+        activeTab.value = data.activeTab
+      }
     } else {
       loraName.value = ''
       notes.value = ''
       originalNotes.value = ''
       filePath.value = ''
+      // Do NOT reset activeTab on deselection — user's tab preference persists
     }
   }
 
@@ -155,6 +342,86 @@ onMounted(() => {
   overflow: hidden;
 }
 
+/* Vue node mode: prevent content from pushing node size via ResizeObserver.
+   contain:layout size tells the browser the element's intrinsic size is
+   determined solely by CSS — not by descendant content. This breaks the
+   feedback loop where content grows → ResizeObserver resizes → content
+   reflows → repeat. Same technique used by tags_widget.js + lm_styles.css. */
+.lora-info-widget.lm-vue-node {
+  contain: layout size;
+}
+
+/* ── Tab bar ── */
+.lora-info-tabs {
+  display: flex;
+  gap: 0;
+  margin-bottom: 10px;
+  border-bottom: 1px solid var(--border-color, #444);
+  flex-shrink: 0;
+}
+
+.lora-info-tab {
+  flex: 1;
+  text-align: center;
+  cursor: pointer;
+  padding: 6px 0;
+  position: relative;
+}
+
+.lora-info-tab-input {
+  position: absolute;
+  opacity: 0;
+  width: 0;
+  height: 0;
+}
+
+.lora-info-tab-label {
+  font-size: 12px;
+  font-weight: 500;
+  color: var(--fg-color, #fff);
+  opacity: 0.5;
+  transition: opacity 0.15s;
+}
+
+.lora-info-tab:hover .lora-info-tab-label {
+  opacity: 0.75;
+}
+
+.lora-info-tab.active .lora-info-tab-label {
+  opacity: 1;
+}
+
+.lora-info-tab.active::after {
+  content: '';
+  position: absolute;
+  bottom: -1px;
+  left: 25%;
+  right: 25%;
+  height: 2px;
+  background: rgba(66, 153, 225, 0.8);
+  border-radius: 1px;
+}
+
+/* ── Tab content ── */
+.tab-content {
+  flex: 1;
+  min-height: 0;
+  overflow: hidden;
+}
+
+.notes-tab {
+  display: flex;
+  flex-direction: column;
+}
+
+.description-tab {
+  display: flex;
+  flex-direction: column;
+  overflow-y: auto;
+  min-height: 0;
+}
+
+/* ── Info fields (shared) ── */
 .info-field {
   display: flex;
   flex-direction: column;
@@ -235,6 +502,87 @@ onMounted(() => {
   border-color: rgba(226, 232, 240, 0.1);
 }
 
+/* ── Description states ── */
+.description-state {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 8px;
+  padding: 24px 16px;
+  color: var(--fg-color, #fff);
+  opacity: 0.5;
+  font-size: 12px;
+  min-height: 0;
+  flex-shrink: 0;
+}
+
+.description-state.error {
+  opacity: 0.7;
+  color: #f87171;
+}
+
+/* ── Description content ── */
+.description-content {
+  min-height: 0;
+}
+
+.description-section {
+  margin-bottom: 14px;
+}
+
+.description-section:last-child {
+  margin-bottom: 0;
+}
+
+.description-text {
+  padding: 8px 0;
+  font-size: 12px;
+  line-height: 1.5;
+  color: var(--fg-color, #fff);
+  opacity: 0.85;
+  word-break: break-word;
+}
+
+.description-text :deep(p) {
+  margin: 0 0 8px 0;
+}
+
+.description-text :deep(p:last-child) {
+  margin-bottom: 0;
+}
+
+.description-text :deep(a) {
+  color: rgba(66, 153, 225, 0.9);
+}
+
+.description-text :deep(ul),
+.description-text :deep(ol) {
+  padding-left: 20px;
+  margin: 4px 0;
+}
+
+.description-text :deep(h1),
+.description-text :deep(h2),
+.description-text :deep(h3) {
+  font-size: 13px;
+  margin: 10px 0 4px 0;
+  font-weight: 600;
+  opacity: 0.95;
+}
+
+.description-text :deep(code) {
+  background: rgba(255, 255, 255, 0.08);
+  padding: 1px 4px;
+  border-radius: 3px;
+  font-size: 11px;
+}
+
+.description-text :deep(img) {
+  max-width: 100%;
+  border-radius: 4px;
+}
+
+/* ── Placeholder (shared) ── */
 .placeholder {
   font-style: italic;
   color: rgba(226, 232, 240, 0.5);
@@ -242,4 +590,14 @@ onMounted(() => {
   padding: 16px 0;
   font-size: 12px;
 }
+
+/* ── Spinner (Font Awesome) ── */
+.fa-spinner {
+  animation: fa-spin 1s linear infinite;
+}
+
+@keyframes fa-spin {
+  0% { transform: rotate(0deg); }
+  100% { transform: rotate(360deg); }
+}
 </style>

vue-widgets/src/main.ts

@@ -656,7 +656,7 @@ function createLoraInfoWidget(node: any) {
 
   forwardMiddleMouseToCanvas(container)
 
-  let internalValue: { name?: string; notes?: string; filePath?: string } | undefined
+  let internalValue: { name?: string; notes?: string; filePath?: string; activeTab?: string } | undefined
 
   const widget = node.addDOMWidget(
     'lora_info_display',
@@ -666,13 +666,13 @@ function createLoraInfoWidget(node: any) {
       getValue() {
         return internalValue
       },
-      setValue(v: { name?: string; notes?: string; filePath?: string }) {
+      setValue(v: { name?: string; notes?: string; filePath?: string; activeTab?: string }) {
         internalValue = v
         if (typeof widget.onSetValue === 'function') {
           widget.onSetValue(v)
         }
       },
-      serialize: false, // Display-only widget
+      serialize: true,
       getMinHeight() {
         return LORA_INFO_WIDGET_MIN_HEIGHT
       }
@@ -684,6 +684,7 @@ function createLoraInfoWidget(node: any) {
     node,
     api,
     app,
+    isVueMode: typeof LiteGraph !== 'undefined' && LiteGraph.vueNodesMode,
   })
 
   vueApp.use(PrimeVue, {

vue-widgets/tests/components/LoraInfoWidget.test.ts

@@ -0,0 +1,417 @@
+/**
+ * Tests for LoraInfoWidget — tab switching, lazy description loading,
+ * state serialization roundtrip, and activeTab persistence.
+ */
+
+import { nextTick } from 'vue'
+import { shallowMount } from '@vue/test-utils'
+import { describe, expect, it, vi, beforeEach, afterEach } from 'vitest'
+import LoraInfoWidget from '@/components/LoraInfoWidget.vue'
+import { setupFetchMock, resetFetchMock } from '../setup'
+
+// ── Helpers ──
+
+function createMockFetchApi(overrides: {
+  response?: unknown
+  ok?: boolean
+  error?: string
+} = {}) {
+  const { response = { success: true, metadata: {} }, ok = true } = overrides
+  return vi.fn().mockResolvedValue({
+    ok,
+    json: () => Promise.resolve(response),
+  })
+}
+
+function createMockToast() {
+  return { add: vi.fn() }
+}
+
+function createMockWidget(value?: unknown) {
+  type PendingInfo = { name: string; notes: string; filePath: string; activeTab?: string } | null
+  const widget = {
+    serializeValue: (async () => null) as () => Promise<unknown>,
+    value: (value ?? undefined) as unknown,
+    onSetValue: undefined as unknown as ((v: unknown) => void),
+    _setLoraInfo: undefined as unknown as (data: Record<string, unknown> | null) => void,
+    __pendingLoraInfo: undefined as unknown as PendingInfo | undefined,
+  }
+  return widget
+}
+
+interface MountOptions {
+  initialValue?: Record<string, unknown>
+}
+
+type TestWidget = ReturnType<typeof createMockWidget>
+
+function mountWidget(options: MountOptions = {}) {
+  const fetchApi = createMockFetchApi()
+  const widget = createMockWidget(options.initialValue)
+  const node = { id: 1 }
+  const app = { extensionManager: { toast: createMockToast() } }
+
+  const wrapper = shallowMount(LoraInfoWidget, {
+    props: { widget, node, api: { fetchApi }, app },
+  })
+
+  return { wrapper, widget: widget as TestWidget, fetchApi, app }
+}
+
+// ── Tests ──
+
+describe('LoraInfoWidget', () => {
+  beforeEach(() => {
+    setupFetchMock()
+  })
+
+  afterEach(() => {
+    resetFetchMock()
+  })
+
+  describe('initial state', () => {
+    it('shows placeholder when no LoRA is selected', () => {
+      const { wrapper } = mountWidget()
+      expect(wrapper.text()).toContain('No LoRA selected')
+    })
+
+    it('shows Notes tab by default when LoRA is set', async () => {
+      const { wrapper, widget } = mountWidget()
+      widget._setLoraInfo!({ name: 'test.safetensors', notes: '', filePath: '/path/test.safetensors' })
+      await nextTick()
+
+      expect(wrapper.text()).toContain('test.safetensors')
+      expect(wrapper.find('.notes-tab').isVisible()).toBe(true)
+      expect(wrapper.find('.description-tab').isVisible()).toBe(false)
+    })
+  })
+
+  describe('tab switching', () => {
+    it('switches to Description tab and back to Notes', async () => {
+      const { wrapper, widget } = mountWidget()
+      widget._setLoraInfo!({ name: 'test.safetensors', notes: '', filePath: '/path/test.safetensors' })
+      await nextTick()
+
+      const tabs = wrapper.findAll('.lora-info-tab')
+
+      // Click Description tab
+      const descriptionTab = wrapper.findAll('.lora-info-tab-input')[1]
+      await descriptionTab.setValue('description')
+      await nextTick()
+
+      expect(tabs[1].classes()).toContain('active')
+      expect(wrapper.text()).toContain('No description available')
+
+      // Switch back to Notes
+      const notesTab = wrapper.findAll('.lora-info-tab-input')[0]
+      await notesTab.setValue('notes')
+      await nextTick()
+
+      expect(tabs[0].classes()).toContain('active')
+      expect(wrapper.text()).toContain('test.safetensors')
+    })
+  })
+
+  describe('description lazy loading', () => {
+    it('fetches metadata when Description tab is activated', async () => {
+      const fetchApi = createMockFetchApi({
+        response: {
+          success: true,
+          metadata: {
+            description: '<p>Version desc</p>',
+            model: { description: '<p>Model desc</p>' },
+          },
+        },
+      })
+      const widget = createMockWidget()
+      const wrapper = shallowMount(LoraInfoWidget, {
+        props: {
+          widget,
+          node: { id: 1 },
+          api: { fetchApi },
+          app: { extensionManager: { toast: createMockToast() } },
+        },
+      })
+
+      widget._setLoraInfo!({ name: 'test.safetensors', notes: '', filePath: '/path/test.safetensors' })
+      await nextTick()
+
+      // Switch to Description tab
+      const descriptionTab = wrapper.findAll('.lora-info-tab-input')[1]
+      await descriptionTab.setValue('description')
+      await nextTick()
+      await nextTick() // flush async fetch
+
+      expect(fetchApi).toHaveBeenCalledWith(
+        expect.stringContaining('/lm/loras/metadata'),
+        expect.objectContaining({ method: 'GET' })
+      )
+      expect(wrapper.html()).toContain('Version desc')
+      expect(wrapper.html()).toContain('Model desc')
+    })
+
+    it('shows loading state while fetching', async () => {
+      // Use a never-resolving promise to simulate loading
+      const fetchApi = vi.fn().mockReturnValue(new Promise(() => {}))
+      const widget = createMockWidget()
+      const wrapper = shallowMount(LoraInfoWidget, {
+        props: {
+          widget,
+          node: { id: 1 },
+          api: { fetchApi },
+          app: { extensionManager: { toast: createMockToast() } },
+        },
+      })
+
+      widget._setLoraInfo!({ name: 'test.safetensors', notes: '', filePath: '/path/test.safetensors' })
+      await nextTick()
+
+      const descriptionTab = wrapper.findAll('.lora-info-tab-input')[1]
+      await descriptionTab.setValue('description')
+      await nextTick()
+
+      expect(wrapper.text()).toContain('Loading description')
+    })
+
+    it('shows error state when fetch fails', async () => {
+      const fetchApi = vi.fn().mockRejectedValue(new Error('Network error'))
+      const widget = createMockWidget()
+      const wrapper = shallowMount(LoraInfoWidget, {
+        props: {
+          widget,
+          node: { id: 1 },
+          api: { fetchApi },
+          app: { extensionManager: { toast: createMockToast() } },
+        },
+      })
+
+      widget._setLoraInfo!({ name: 'test.safetensors', notes: '', filePath: '/path/test.safetensors' })
+      await nextTick()
+
+      const descriptionTab = wrapper.findAll('.lora-info-tab-input')[1]
+      await descriptionTab.setValue('description')
+      await nextTick()
+      await nextTick()
+
+      expect(wrapper.text()).toContain('Failed to load description')
+    })
+
+    it('shows empty state when metadata has no descriptions', async () => {
+      const fetchApi = createMockFetchApi({
+        response: {
+          success: true,
+          metadata: {
+            description: '',
+            model: {},
+          },
+        },
+      })
+      const widget = createMockWidget()
+      const wrapper = shallowMount(LoraInfoWidget, {
+        props: {
+          widget,
+          node: { id: 1 },
+          api: { fetchApi },
+          app: { extensionManager: { toast: createMockToast() } },
+        },
+      })
+
+      widget._setLoraInfo!({ name: 'test.safetensors', notes: '', filePath: '/path/test.safetensors' })
+      await nextTick()
+
+      const descriptionTab = wrapper.findAll('.lora-info-tab-input')[1]
+      await descriptionTab.setValue('description')
+      await nextTick()
+      await nextTick()
+
+      expect(wrapper.text()).toContain('No description available')
+    })
+
+    it('caches description and does not re-fetch on second activation', async () => {
+      const fetchApi = createMockFetchApi({
+        response: {
+          success: true,
+          metadata: {
+            description: '<p>Version desc</p>',
+            model: { description: '<p>Model desc</p>' },
+          },
+        },
+      })
+      const widget = createMockWidget()
+      const wrapper = shallowMount(LoraInfoWidget, {
+        props: {
+          widget,
+          node: { id: 1 },
+          api: { fetchApi },
+          app: { extensionManager: { toast: createMockToast() } },
+        },
+      })
+
+      widget._setLoraInfo!({ name: 'test.safetensors', notes: '', filePath: '/path/test.safetensors' })
+      await nextTick()
+
+      // First activation
+      const descriptionTab = wrapper.findAll('.lora-info-tab-input')[1]
+      await descriptionTab.setValue('description')
+      await nextTick()
+      await nextTick()
+
+      expect(fetchApi).toHaveBeenCalledTimes(1)
+
+      // Switch away and back
+      const notesTab = wrapper.findAll('.lora-info-tab-input')[0]
+      await notesTab.setValue('notes')
+      await nextTick()
+      await descriptionTab.setValue('description')
+      await nextTick()
+
+      // Should NOT have called fetch again
+      expect(fetchApi).toHaveBeenCalledTimes(1)
+    })
+
+    it('re-fetches when LoRA selection changes', async () => {
+      const fetchApi = createMockFetchApi({
+        response: {
+          success: true,
+          metadata: {
+            description: '<p>Version desc</p>',
+            model: { description: '<p>Model desc</p>' },
+          },
+        },
+      })
+      const widget = createMockWidget()
+      const wrapper = shallowMount(LoraInfoWidget, {
+        props: {
+          widget,
+          node: { id: 1 },
+          api: { fetchApi },
+          app: { extensionManager: { toast: createMockToast() } },
+        },
+      })
+
+      widget._setLoraInfo!({ name: 'first.safetensors', notes: '', filePath: '/path/first.safetensors' })
+      await nextTick()
+
+      const descriptionTab = wrapper.findAll('.lora-info-tab-input')[1]
+      await descriptionTab.setValue('description')
+      await nextTick()
+      await nextTick()
+
+      expect(fetchApi).toHaveBeenCalledTimes(1)
+
+      // Select a different LoRA — resets description state
+      widget._setLoraInfo!({ name: 'second.safetensors', notes: '', filePath: '/path/second.safetensors' })
+      await nextTick()
+
+      // Should show loading again (not cached)
+      await descriptionTab.setValue('description')
+      await nextTick()
+      await nextTick()
+
+      expect(fetchApi).toHaveBeenCalledTimes(2)
+    })
+  })
+
+  describe('serialization roundtrip', () => {
+    it('serializeValue includes activeTab', async () => {
+      const { wrapper, widget } = mountWidget()
+      widget._setLoraInfo!({ name: 'test.safetensors', notes: 'my notes', filePath: '/path/test.safetensors' })
+      await nextTick()
+
+      // Switch to Description tab
+      const descriptionTab = wrapper.findAll('.lora-info-tab-input')[1]
+      await descriptionTab.setValue('description')
+      await nextTick()
+
+      const serialized = await widget.serializeValue!()
+      expect(serialized).toMatchObject({
+        name: 'test.safetensors',
+        notes: 'my notes',
+        filePath: '/path/test.safetensors',
+        activeTab: 'description',
+      })
+    })
+
+    it('onSetValue restores activeTab from workflow value', async () => {
+      const { wrapper } = mountWidget({
+        initialValue: {
+          name: 'saved.safetensors',
+          notes: 'saved notes',
+          filePath: '/path/saved.safetensors',
+          activeTab: 'description',
+        },
+      })
+
+      await nextTick()
+
+      // Description tab should be visible (activeTab restored to 'description')
+      expect(wrapper.find('.description-tab').isVisible()).toBe(true)
+      expect(wrapper.text()).toContain('saved.safetensors')
+    })
+
+    it('defaults to notes tab when activeTab is missing in saved value', async () => {
+      const { wrapper } = mountWidget({
+        initialValue: {
+          name: 'legacy.safetensors',
+          notes: 'legacy notes',
+          filePath: '/path/legacy.safetensors',
+          // No activeTab — legacy workflow
+        },
+      })
+
+      await nextTick()
+
+      expect(wrapper.find('.notes-tab').isVisible()).toBe(true)
+    })
+  })
+
+  describe('_setLoraInfo race condition guard', () => {
+    it('consumes __pendingLoraInfo pushed before mount', async () => {
+      const widget = createMockWidget()
+      widget.__pendingLoraInfo = {
+        name: 'pending.safetensors',
+        notes: 'pending notes',
+        filePath: '/path/pending.safetensors',
+      }
+
+      const wrapper = shallowMount(LoraInfoWidget, {
+        props: {
+          widget,
+          node: { id: 1 },
+          api: { fetchApi: createMockFetchApi() },
+          app: { extensionManager: { toast: createMockToast() } },
+        },
+      })
+
+      await nextTick()
+
+      expect(widget.__pendingLoraInfo).toBeUndefined()
+      expect(wrapper.text()).toContain('pending.safetensors')
+    })
+
+    it('preserves activeTab when _setLoraInfo called with null (deselection)', async () => {
+      const { wrapper, widget } = mountWidget()
+      widget._setLoraInfo!({ name: 'test.safetensors', notes: '', filePath: '/path/test.safetensors' })
+      await nextTick()
+
+      // Switch to Description tab
+      const descriptionTab = wrapper.findAll('.lora-info-tab-input')[1]
+      await descriptionTab.setValue('description')
+      await nextTick()
+
+      // Deselect — template shows placeholder (no tab bar rendered)
+      widget._setLoraInfo!(null)
+      await nextTick()
+
+      // Placeholder shown
+      expect(wrapper.text()).toContain('No LoRA selected')
+
+      // Re-select — activeTab should still be 'description'
+      widget._setLoraInfo!({ name: 'second.safetensors', notes: '', filePath: '/path/second.safetensors' })
+      await nextTick()
+
+      const tabs = wrapper.findAll('.lora-info-tab')
+      expect(tabs[1].classes()).toContain('active')
+    })
+  })
+})