diff --git a/cli/src/claude/claudeLocalLauncher.test.ts b/cli/src/claude/claudeLocalLauncher.test.ts
index fedf6a0a3..a4e855aab 100644
--- a/cli/src/claude/claudeLocalLauncher.test.ts
+++ b/cli/src/claude/claudeLocalLauncher.test.ts
@@ -105,4 +105,32 @@ describe('claudeLocalLauncher message filtering', () => {
 
         expect(sentMessages).toHaveLength(2)
     })
+
+    it('filters out isMeta messages (e.g. skill injections)', async () => {
+        const { session, sentMessages } = createSessionStub()
+        await claudeLocalLauncher(session as never)
+
+        harness.scannerOnMessage!({
+            type: 'user',
+            isMeta: true,
+            uuid: '1',
+            message: { content: [{ type: 'text', text: '# Skill content...' }] }
+        })
+
+        expect(sentMessages).toHaveLength(0)
+    })
+
+    it('filters out isCompactSummary messages', async () => {
+        const { session, sentMessages } = createSessionStub()
+        await claudeLocalLauncher(session as never)
+
+        harness.scannerOnMessage!({
+            type: 'assistant',
+            isCompactSummary: true,
+            uuid: '1',
+            message: { content: 'compacted context' }
+        })
+
+        expect(sentMessages).toHaveLength(0)
+    })
 })
diff --git a/cli/src/claude/claudeLocalLauncher.ts b/cli/src/claude/claudeLocalLauncher.ts
index 5bada013e..291569cda 100644
--- a/cli/src/claude/claudeLocalLauncher.ts
+++ b/cli/src/claude/claudeLocalLauncher.ts
@@ -15,6 +15,11 @@ export async function claudeLocalLauncher(session: Session): Promise<'switch' |
             if (message.type === 'summary') {
                 return
             }
+            // Filter out internal meta messages (e.g. skill injections) and
+            // compact summaries to avoid them appearing in the web UI
+            if (message.isMeta || message.isCompactSummary) {
+                return
+            }
             // Filter out invisible system messages (e.g. init, stop_hook_summary)
             // to avoid them showing as raw JSON in the web UI
             if (!isClaudeChatVisibleMessage(message)) {
diff --git a/cli/src/claude/utils/OutgoingMessageQueue.test.ts b/cli/src/claude/utils/OutgoingMessageQueue.test.ts
new file mode 100644
index 000000000..9530bf338
--- /dev/null
+++ b/cli/src/claude/utils/OutgoingMessageQueue.test.ts
@@ -0,0 +1,51 @@
+import { afterEach, beforeEach, describe, expect, it } from 'vitest'
+import { OutgoingMessageQueue } from './OutgoingMessageQueue'
+
+describe('OutgoingMessageQueue message filtering', () => {
+    let sent: Array<Record<string, unknown>>
+    let queue: OutgoingMessageQueue
+
+    beforeEach(() => {
+        sent = []
+        queue = new OutgoingMessageQueue((msg) => { sent.push(msg) })
+    })
+
+    afterEach(() => {
+        queue.destroy()
+    })
+
+    it('sends normal messages', async () => {
+        queue.enqueue({ type: 'assistant', uuid: '1' })
+        queue.enqueue({ type: 'user', uuid: '2' })
+        await queue.flush()
+
+        expect(sent).toHaveLength(2)
+    })
+
+    it('filters out system messages', async () => {
+        queue.enqueue({ type: 'system', subtype: 'init', uuid: '1' })
+        queue.enqueue({ type: 'assistant', uuid: '2' })
+        await queue.flush()
+
+        expect(sent).toHaveLength(1)
+        expect(sent[0]).toMatchObject({ type: 'assistant' })
+    })
+
+    it('filters out isMeta messages', async () => {
+        queue.enqueue({ type: 'user', isMeta: true, uuid: '1' })
+        queue.enqueue({ type: 'assistant', uuid: '2' })
+        await queue.flush()
+
+        expect(sent).toHaveLength(1)
+        expect(sent[0]).toMatchObject({ type: 'assistant' })
+    })
+
+    it('filters out isCompactSummary messages', async () => {
+        queue.enqueue({ type: 'assistant', isCompactSummary: true, uuid: '1' })
+        queue.enqueue({ type: 'user', uuid: '2' })
+        await queue.flush()
+
+        expect(sent).toHaveLength(1)
+        expect(sent[0]).toMatchObject({ type: 'user' })
+    })
+})
diff --git a/cli/src/claude/utils/OutgoingMessageQueue.ts b/cli/src/claude/utils/OutgoingMessageQueue.ts
index 6d214c657..a3b1736e6 100644
--- a/cli/src/claude/utils/OutgoingMessageQueue.ts
+++ b/cli/src/claude/utils/OutgoingMessageQueue.ts
@@ -121,7 +121,7 @@ export class OutgoingMessageQueue {
             
             // Send if not already sent
             if (!item.sent) {
-                if (item.logMessage.type !== 'system') {
+                if (item.logMessage.type !== 'system' && !item.logMessage.isMeta && !item.logMessage.isCompactSummary) {
                     this.sendFunction(item.logMessage);
                 }
                 item.sent = true;