diff --git a/packages/runtime/src/components/Badge.ce.vue b/packages/runtime/src/components/Badge.ce.vue
index 5d4324d4..f02c484b 100644
--- a/packages/runtime/src/components/Badge.ce.vue
+++ b/packages/runtime/src/components/Badge.ce.vue
@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { computed } from 'vue'
+import { computed, ref } from 'vue'
 
 const props = withDefaults(
   defineProps<{
@@ -34,38 +34,67 @@ const bgColorClass = computed(() => {
   return 'summary-success'
 })
 
-// $: calcBgColorClass = () => {
-//   if (!summary) return ''
-//   if (summary.errorCount > 0) return 'summary-error'
-//   if (summary.warningCount > 0) return 'summary-warning'
-//   return 'summary-success'
-// }
-
-// $: bgColorClass = calcBgColorClass()
+const isCopied = ref(false)
+const onCopy = async () => {
+  const text = props.checkerResults
+    .map((result) => {
+      return result.diagnostics
+        .map((d: any) => {
+          return `[${result.checkerId}] ${d.message}${d.id ? ` (${d.id})` : ''}${
+            d.loc ? `\n${d.loc.file}:${d.loc.line}:${d.loc.column}` : ''
+          }${d.frame ? `\n${d.frame}` : ''}`
+        })
+        .join('\n\n')
+    })
+    .join('\n\n---\n\n')
+
+  try {
+    await navigator.clipboard.writeText(text)
+    isCopied.value = true
+    setTimeout(() => {
+      isCopied.value = false
+    }, 2000)
+  } catch (err) {
+    console.error('Failed to copy: ', err)
+  }
+}
 </script>
 
 <template>
-  <button
-    :class="[
-      'badge-base',
-      collapsed ? `to-uncollpase ${bgColorClass}` : 'to-collpase',
-      `badge-${position}`,
-    ]"
-    :style="badgeStyle"
-    @click="onClick"
-  >
-    <template v-if="collapsed">
-      <span class="summary"><span class="emoji">❗️</span>{{ summary.errorCount }}</span>
-      <span class="summary"><span class="emoji">⚠️</span>{{ summary.warningCount }}</span>
-    </template>
-    <template v-else>
-      <span>Close</span>
-    </template>
-  </button>
+  <div :class="['badge-container', `badge-${position}`]" :style="badgeStyle">
+    <button v-if="!collapsed" class="badge-button copy-button" @click="onCopy">
+      {{ isCopied ? 'Copied!' : 'Copy' }}
+    </button>
+    <button
+      :class="[
+        'badge-button',
+        'action-button',
+        collapsed ? `to-uncollpase ${bgColorClass}` : 'to-collpase',
+      ]"
+      @click="onClick"
+    >
+      <template v-if="collapsed">
+        <span class="summary"><span class="emoji">❗️</span>{{ summary.errorCount }}</span>
+        <span class="summary"><span class="emoji">⚠️</span>{{ summary.warningCount }}</span>
+      </template>
+      <template v-else>
+        <span>Close</span>
+      </template>
+    </button>
+  </div>
 </template>
 
 <style>
-.badge-base {
+.badge-container {
+  display: flex;
+  gap: 0.5em;
+  position: fixed;
+  z-index: 99999;
+  margin: 0.5em;
+  border-radius: 0.3em;
+}
+
+.badge-button {
   appearance: none;
   font-size: 0.9em;
   font-weight: bold;
@@ -73,9 +102,20 @@ const bgColorClass = computed(() => {
   border-radius: 0.3em;
   padding: 0.5em;
   cursor: pointer;
-  position: fixed;
-  z-index: 99999;
-  margin: 0.5em;
+  color: white;
+}
+
+.copy-button {
+  background: rgb(63, 78, 96);
+  border: 1px solid rgba(255, 255, 255, 0.1);
+}
+
+.copy-button:hover {
+  background: rgb(73, 88, 106);
+}
+
+.action-button {
+  background: transparent;
 }
 
 .badge-bl {
@@ -99,7 +139,6 @@ const bgColorClass = computed(() => {
 }
 
 .to-collpase {
-  color: white;
   background: rgb(63, 78, 96);
 }
 
diff --git a/playground/config-initialIsOpen-false/__tests__/test.spec.ts b/playground/config-initialIsOpen-false/__tests__/test.spec.ts
index 4cf9d3a0..d2f9c76c 100644
--- a/playground/config-initialIsOpen-false/__tests__/test.spec.ts
+++ b/playground/config-initialIsOpen-false/__tests__/test.spec.ts
@@ -11,7 +11,7 @@ describe('config-initialIsOpen-false', () => {
           await getHmrOverlayText()
         } catch (e) {
           expect((e as any).toString()).toContain(
-            'Invariant failed: <vite-plugin-checker-error-overlay> shadow dom is expected to be found, but got null'
+            'Invariant failed: .message-body is expected in shadow root'
           )
         }
       }
diff --git a/playground/config-overlay-changes/__tests__/test.spec.ts b/playground/config-overlay-changes/__tests__/test.spec.ts
index 4b77a51e..10343f83 100644
--- a/playground/config-overlay-changes/__tests__/test.spec.ts
+++ b/playground/config-overlay-changes/__tests__/test.spec.ts
@@ -5,6 +5,7 @@ import {
   getHmrOverlay,
   getHmrOverlayText,
   isServe,
+  page,
   pollingUntil,
   sleep,
   sleepForEdit,
@@ -20,6 +21,50 @@ describe('config-overlay-changes', () => {
       expect(file1).toMatchSnapshot()
       expect(frame1).toMatchSnapshot()
 
+      console.log('-- copy diagnostics to clipboard --')
+      const overlay = page.locator('vite-plugin-checker-error-overlay')
+      const actionButton = overlay.locator('.action-button')
+      await actionButton.waitFor({ state: 'visible' })
+
+      // Expand overlay if collapsed
+      const isCollapsed = await actionButton.evaluate(
+        (el) => (el as HTMLElement).querySelector('.summary') !== null
+      )
+      if (isCollapsed) {
+        await actionButton.click()
+        await sleep(500) // Wait for expansion
+      }
+
+      const copyButton = overlay.locator('.copy-button')
+      await copyButton.waitFor({ state: 'visible' })
+
+      // Mock clipboard API
+      await page.evaluate(() => {
+        ;(window as any).__lastCopiedText = ''
+        Object.defineProperty(window.Navigator.prototype, 'clipboard', {
+          get: () => ({
+            writeText: (text: string) => {
+              ;(window as any).__lastCopiedText = text
+              return Promise.resolve()
+            },
+          }),
+          configurable: true,
+        })
+      })
+
+      await copyButton.click()
+
+      // Check visual feedback
+      await pollingUntil(
+        async () => await copyButton.innerText(),
+        (text) => text === 'Copied!'
+      )
+
+      // Check "clipboard" content
+      const copiedText = await page.evaluate(() => (window as any).__lastCopiedText)
+      expect(copiedText).toContain('[eslint]')
+      expect(copiedText).toContain('var hello')
+
       console.log('-- overlay update after edit --')
       editFile('src/main.ts', (code) => code.replace('Hello', 'Hello1'))
       await sleepForEdit()
@@ -37,3 +82,5 @@ describe('config-overlay-changes', () => {
     })
   })
 })
+
+
diff --git a/playground/config-overlay-position-style/__tests__/test.spec.ts b/playground/config-overlay-position-style/__tests__/test.spec.ts
index f3abff14..cf7f7745 100644
--- a/playground/config-overlay-position-style/__tests__/test.spec.ts
+++ b/playground/config-overlay-position-style/__tests__/test.spec.ts
@@ -6,7 +6,7 @@ describe('config-overlay-position-style', () => {
     it('find badge in right top corner and customized by badgeStyle', async () => {
       await sleepForServerReady()
       const shadowRoot = await getHmrOverlay()
-      const badge = await shadowRoot!.$('.badge-base')
+      const badge = await shadowRoot!.$('.badge-container')
 
       const { bgColor, top, right } = await badge!.evaluate((el) => {
         const bgColor = window.getComputedStyle(el).getPropertyValue('background-color')