diff --git a/docs/tasks/streams.mdx b/docs/tasks/streams.mdx
index 448ba9fe1..302987d68 100644
--- a/docs/tasks/streams.mdx
+++ b/docs/tasks/streams.mdx
@@ -688,6 +688,7 @@ Examples:
 - ❌ `\u1680///\u1680` (empty after trimming wrapper whitespace)
 - ❌ `\u2007///\u2007` (empty after trimming wrapper whitespace)
 - ❌ `\u205F///\u205F` (empty after trimming wrapper whitespace)
+- ❌ `\u180E///\u180E` (rejected as internal invisible-separator whitespace)
 - ❌ `\u3000///\u3000` (empty after trimming wrapper whitespace)
 - ❌ `\n\thttps://api.trigger.dev/base/?query=1\t\n` (query is still rejected after trimming wrappers)
 - ❌ `\n\thttps://api.trigger.dev/base/#fragment\t\n` (hash is still rejected after trimming wrappers)
diff --git a/packages/ai/README.md b/packages/ai/README.md
index ca15a8cd0..4c15758ea 100644
--- a/packages/ai/README.md
+++ b/packages/ai/README.md
@@ -195,6 +195,7 @@ Examples:
 - ❌ `\u1680///\u1680` (empty after trimming wrapper whitespace)
 - ❌ `\u2007///\u2007` (empty after trimming wrapper whitespace)
 - ❌ `\u205F///\u205F` (empty after trimming wrapper whitespace)
+- ❌ `\u180E///\u180E` (rejected as internal invisible-separator whitespace)
 - ❌ `\u3000///\u3000` (empty after trimming wrapper whitespace)
 - ❌ `\n\thttps://api.trigger.dev/base/?query=1\t\n` (query is still rejected after trimming wrappers)
 - ❌ `\n\thttps://api.trigger.dev/base/#fragment\t\n` (hash is still rejected after trimming wrappers)
diff --git a/packages/ai/src/chatTransport.test.ts b/packages/ai/src/chatTransport.test.ts
index f823441f9..e488a48f3 100644
--- a/packages/ai/src/chatTransport.test.ts
+++ b/packages/ai/src/chatTransport.test.ts
@@ -808,6 +808,17 @@ describe("TriggerChatTransport", function () {
     }).toThrowError("baseURL must not be empty");
   });
 
+  it("throws internal-whitespace validation for mongolian-vowel-separator wrapper slashes", function () {
+    expect(function () {
+      new TriggerChatTransport({
+        task: "chat-task",
+        accessToken: "pk_trigger",
+        baseURL: "\u180E///\u180E",
+        stream: "chat-stream",
+      });
+    }).toThrowError("baseURL must not contain internal whitespace characters");
+  });
+
   it("uses default baseURL when omitted", function () {
     expect(function () {
       new TriggerChatTransport({
@@ -3934,6 +3945,17 @@ describe("TriggerChatTransport", function () {
     }).toThrowError("baseURL must not be empty");
   });
 
+  it("throws internal-whitespace validation from factory for mongolian-vowel-separator wrapper slashes", function () {
+    expect(function () {
+      createTriggerChatTransport({
+        task: "chat-task",
+        accessToken: "pk_trigger",
+        baseURL: "\u180E///\u180E",
+        stream: "chat-stream",
+      });
+    }).toThrowError("baseURL must not contain internal whitespace characters");
+  });
+
   it("uses default baseURL in factory when omitted", function () {
     expect(function () {
       createTriggerChatTransport({