diff --git a/ui/src/ui/chat/message-extract.test.ts b/ui/src/ui/chat/message-extract.test.ts
index 70dd28e001..5df1fc329f 100644
--- a/ui/src/ui/chat/message-extract.test.ts
+++ b/ui/src/ui/chat/message-extract.test.ts
@@ -25,6 +25,48 @@ describe("extractTextCached", () => {
   });
 });
 
+describe("extractText strips directive tags from assistant messages", () => {
+  it("strips [[reply_to_current]]", () => {
+    const message = {
+      role: "assistant",
+      content: "Hello there [[reply_to_current]]",
+    };
+    expect(extractText(message)).toBe("Hello there");
+  });
+
+  it("strips [[reply_to:<id>]]", () => {
+    const message = {
+      role: "assistant",
+      content: [{ type: "text", text: "Done [[reply_to: abc123]]" }],
+    };
+    expect(extractText(message)).toBe("Done");
+  });
+
+  it("strips [[audio_as_voice]]", () => {
+    const message = {
+      role: "assistant",
+      content: "Listen up [[audio_as_voice]]",
+    };
+    expect(extractText(message)).toBe("Listen up");
+  });
+
+  it("does not strip tags from user messages", () => {
+    const message = {
+      role: "user",
+      content: "Hello [[reply_to_current]]",
+    };
+    expect(extractText(message)).toBe("Hello [[reply_to_current]]");
+  });
+
+  it("strips tag from .text property", () => {
+    const message = {
+      role: "assistant",
+      text: "Hi [[reply_to_current]]",
+    };
+    expect(extractText(message)).toBe("Hi");
+  });
+});
+
 describe("extractThinkingCached", () => {
   it("matches extractThinking output", () => {
     const message = {
diff --git a/ui/src/ui/chat/message-extract.ts b/ui/src/ui/chat/message-extract.ts
index d36ead000f..e49da577b6 100644
--- a/ui/src/ui/chat/message-extract.ts
+++ b/ui/src/ui/chat/message-extract.ts
@@ -1,6 +1,19 @@
 import { stripEnvelope } from "../../../../src/shared/chat-envelope.js";
 import { stripThinkingTags } from "../format.ts";
 
+/**
+ * Strip inline directive tags (`[[reply_to_current]]`, `[[reply_to:<id>]]`,
+ * `[[audio_as_voice]]`) that should never be rendered to the user.
+ * Matches the same patterns as `src/utils/directive-tags.ts`.
+ */
+function stripDirectiveTags(text: string): string {
+  return text
+    .replace(/\[\[\s*(?:reply_to_current|reply_to\s*:\s*[^\]\n]+|audio_as_voice)\s*\]\]/gi, "")
+    .replace(/[ \t]+/g, " ")
+    .replace(/[ \t]*\n[ \t]*/g, "\n")
+    .trim();
+}
+
 const textCache = new WeakMap<object, string | null>();
 const thinkingCache = new WeakMap<object, string | null>();
 
@@ -9,7 +22,10 @@ export function extractText(message: unknown): string | null {
   const role = typeof m.role === "string" ? m.role : "";
   const content = m.content;
   if (typeof content === "string") {
-    const processed = role === "assistant" ? stripThinkingTags(content) : stripEnvelope(content);
+    let processed = role === "assistant" ? stripThinkingTags(content) : stripEnvelope(content);
+    if (role === "assistant") {
+      processed = stripDirectiveTags(processed);
+    }
     return processed;
   }
   if (Array.isArray(content)) {
@@ -24,12 +40,18 @@ export function extractText(message: unknown): string | null {
       .filter((v): v is string => typeof v === "string");
     if (parts.length > 0) {
       const joined = parts.join("\n");
-      const processed = role === "assistant" ? stripThinkingTags(joined) : stripEnvelope(joined);
+      let processed = role === "assistant" ? stripThinkingTags(joined) : stripEnvelope(joined);
+      if (role === "assistant") {
+        processed = stripDirectiveTags(processed);
+      }
       return processed;
     }
   }
   if (typeof m.text === "string") {
-    const processed = role === "assistant" ? stripThinkingTags(m.text) : stripEnvelope(m.text);
+    let processed = role === "assistant" ? stripThinkingTags(m.text) : stripEnvelope(m.text);
+    if (role === "assistant") {
+      processed = stripDirectiveTags(processed);
+    }
     return processed;
   }
   return null;