diff --git a/docs/tasks/streams.mdx b/docs/tasks/streams.mdx
index 302987d68..1bbdc15c9 100644
--- a/docs/tasks/streams.mdx
+++ b/docs/tasks/streams.mdx
@@ -672,6 +672,7 @@ Examples:
 - ✅ `\u00A0https://api.trigger.dev/custom-prefix/\u00A0` (non-breaking-space wrapper trimmed)
 - ✅ `\u1680https://api.trigger.dev/custom-prefix/\u1680` (ogham-space-mark wrapper trimmed)
 - ✅ `\u2007https://api.trigger.dev/custom-prefix/\u2007` (figure-space wrapper trimmed)
+- ✅ `\u200Ahttps://api.trigger.dev/custom-prefix/\u200A` (hair-space wrapper trimmed)
 - ✅ `\u205Fhttps://api.trigger.dev/custom-prefix/\u205F` (medium-mathematical-space wrapper trimmed)
 - ✅ `\u3000https://api.trigger.dev/custom-prefix/\u3000` (ideographic-space wrapper trimmed)
 - ✅ `\uFEFFhttps://api.trigger.dev/custom-prefix/\uFEFF` (BOM wrapper trimmed)
@@ -705,6 +706,7 @@ Examples:
 - ❌ `https://api.trigger.dev/\u200Dinternal`
 - ❌ `https://api.trigger.dev/\u1680internal`
 - ❌ `https://api.trigger.dev/\u2007internal`
+- ❌ `https://api.trigger.dev/\u200Ainternal`
 - ❌ `https://api.trigger.dev/\u202Finternal`
 - ❌ `https://api.trigger.dev/\u205Finternal`
 - ❌ `https://api.trigger.dev/\u180Einternal`
diff --git a/packages/ai/README.md b/packages/ai/README.md
index 4c15758ea..ceb22329a 100644
--- a/packages/ai/README.md
+++ b/packages/ai/README.md
@@ -179,6 +179,7 @@ Examples:
 - ✅ `\u00A0https://api.trigger.dev/custom-prefix/\u00A0` (non-breaking-space wrapper trimmed)
 - ✅ `\u1680https://api.trigger.dev/custom-prefix/\u1680` (ogham-space-mark wrapper trimmed)
 - ✅ `\u2007https://api.trigger.dev/custom-prefix/\u2007` (figure-space wrapper trimmed)
+- ✅ `\u200Ahttps://api.trigger.dev/custom-prefix/\u200A` (hair-space wrapper trimmed)
 - ✅ `\u205Fhttps://api.trigger.dev/custom-prefix/\u205F` (medium-mathematical-space wrapper trimmed)
 - ✅ `\u3000https://api.trigger.dev/custom-prefix/\u3000` (ideographic-space wrapper trimmed)
 - ✅ `\uFEFFhttps://api.trigger.dev/custom-prefix/\uFEFF` (BOM wrapper trimmed)
@@ -212,6 +213,7 @@ Examples:
 - ❌ `https://api.trigger.dev/\u200Dinternal` (internal zero-width-joiner characters)
 - ❌ `https://api.trigger.dev/\u1680internal` (internal ogham-space-mark characters)
 - ❌ `https://api.trigger.dev/\u2007internal` (internal figure-space characters)
+- ❌ `https://api.trigger.dev/\u200Ainternal` (internal hair-space characters)
 - ❌ `https://api.trigger.dev/\u202Finternal` (internal narrow no-break space characters)
 - ❌ `https://api.trigger.dev/\u205Finternal` (internal medium-mathematical-space characters)
 - ❌ `https://api.trigger.dev/\u180Einternal` (internal mongolian-vowel-separator characters)
diff --git a/packages/ai/src/chatTransport.test.ts b/packages/ai/src/chatTransport.test.ts
index e488a48f3..d20d0a682 100644
--- a/packages/ai/src/chatTransport.test.ts
+++ b/packages/ai/src/chatTransport.test.ts
@@ -961,6 +961,17 @@ describe("TriggerChatTransport", function () {
     }).toThrowError("baseURL must not contain internal whitespace characters");
   });
 
+  it("throws when baseURL contains internal hair-space characters", function () {
+    expect(function () {
+      new TriggerChatTransport({
+        task: "chat-task",
+        accessToken: "pk_trigger",
+        baseURL: "https://api.trigger.dev/\u200Ainternal",
+        stream: "chat-stream",
+      });
+    }).toThrowError("baseURL must not contain internal whitespace characters");
+  });
+
   it("throws when baseURL contains internal mongolian-vowel-separator characters", function () {
     expect(function () {
       new TriggerChatTransport({
@@ -1478,6 +1489,17 @@ describe("TriggerChatTransport", function () {
     }).not.toThrow();
   });
 
+  it("accepts hair-space wrapped baseURL values", function () {
+    expect(function () {
+      new TriggerChatTransport({
+        task: "chat-task",
+        accessToken: "pk_trigger",
+        baseURL: "\u200Ahttps://api.trigger.dev/custom-prefix/\u200A",
+        stream: "chat-stream",
+      });
+    }).not.toThrow();
+  });
+
   it("accepts ideographic-space wrapped baseURL values", function () {
     expect(function () {
       new TriggerChatTransport({
@@ -4098,6 +4120,17 @@ describe("TriggerChatTransport", function () {
     }).toThrowError("baseURL must not contain internal whitespace characters");
   });
 
+  it("throws from factory when baseURL contains internal hair-space characters", function () {
+    expect(function () {
+      createTriggerChatTransport({
+        task: "chat-task",
+        accessToken: "pk_trigger",
+        baseURL: "https://api.trigger.dev/\u200Ainternal",
+        stream: "chat-stream",
+      });
+    }).toThrowError("baseURL must not contain internal whitespace characters");
+  });
+
   it("throws from factory when baseURL contains internal mongolian-vowel-separator characters", function () {
     expect(function () {
       createTriggerChatTransport({
@@ -4604,6 +4637,17 @@ describe("TriggerChatTransport", function () {
     }).not.toThrow();
   });
 
+  it("accepts hair-space wrapped baseURL values from factory", function () {
+    expect(function () {
+      createTriggerChatTransport({
+        task: "chat-task",
+        accessToken: "pk_trigger",
+        baseURL: "\u200Ahttps://api.trigger.dev/custom-prefix/\u200A",
+        stream: "chat-stream",
+      });
+    }).not.toThrow();
+  });
+
   it("accepts ideographic-space wrapped baseURL values from factory", function () {
     expect(function () {
       createTriggerChatTransport({