diff --git a/python/packages/kagent-adk/src/kagent/adk/_a2a.py b/python/packages/kagent-adk/src/kagent/adk/_a2a.py
index 82ae329ed..4329d94d1 100644
--- a/python/packages/kagent-adk/src/kagent/adk/_a2a.py
+++ b/python/packages/kagent-adk/src/kagent/adk/_a2a.py
@@ -42,12 +42,12 @@ def health_check(request: Request) -> PlainTextResponse:
 
 
 def thread_dump(request: Request) -> PlainTextResponse:
-    import io
+    import tempfile
 
-    buf = io.StringIO()
-    faulthandler.dump_traceback(file=buf)
-    buf.seek(0)
-    return PlainTextResponse(buf.read())
+    with tempfile.TemporaryFile(mode="w+") as tmp:
+        faulthandler.dump_traceback(file=tmp, all_threads=True)
+        tmp.seek(0)
+        return PlainTextResponse(tmp.read())
 
 
 kagent_url_override = os.getenv("KAGENT_URL")
diff --git a/python/packages/kagent-crewai/src/kagent/crewai/_a2a.py b/python/packages/kagent-crewai/src/kagent/crewai/_a2a.py
index 1f3a7e676..fa64b19b8 100644
--- a/python/packages/kagent-crewai/src/kagent/crewai/_a2a.py
+++ b/python/packages/kagent-crewai/src/kagent/crewai/_a2a.py
@@ -29,12 +29,12 @@ def def_health_check(request: Request) -> PlainTextResponse:
 
 
 def thread_dump(request: Request) -> PlainTextResponse:
-    import io
+    import tempfile
 
-    buf = io.StringIO()
-    faulthandler.dump_traceback(file=buf)
-    buf.seek(0)
-    return PlainTextResponse(buf.read())
+    with tempfile.TemporaryFile(mode="w+") as tmp:
+        faulthandler.dump_traceback(file=tmp, all_threads=True)
+        tmp.seek(0)
+        return PlainTextResponse(tmp.read())
 
 
 class KAgentApp:
diff --git a/python/packages/kagent-langgraph/src/kagent/langgraph/_a2a.py b/python/packages/kagent-langgraph/src/kagent/langgraph/_a2a.py
index 877abbc46..d7936cf85 100644
--- a/python/packages/kagent-langgraph/src/kagent/langgraph/_a2a.py
+++ b/python/packages/kagent-langgraph/src/kagent/langgraph/_a2a.py
@@ -35,12 +35,12 @@ def health_check(request: Request) -> PlainTextResponse:
 
 def thread_dump(request: Request) -> PlainTextResponse:
     """Thread dump endpoint for debugging."""
-    import io
+    import tempfile
 
-    buf = io.StringIO()
-    faulthandler.dump_traceback(file=buf)
-    buf.seek(0)
-    return PlainTextResponse(buf.read())
+    with tempfile.TemporaryFile(mode="w+") as tmp:
+        faulthandler.dump_traceback(file=tmp, all_threads=True)
+        tmp.seek(0)
+        return PlainTextResponse(tmp.read())
 
 
 class KAgentApp:
diff --git a/python/packages/kagent-openai/src/kagent/openai/_a2a.py b/python/packages/kagent-openai/src/kagent/openai/_a2a.py
index 1f1fddbaf..92965e7d3 100644
--- a/python/packages/kagent-openai/src/kagent/openai/_a2a.py
+++ b/python/packages/kagent-openai/src/kagent/openai/_a2a.py
@@ -44,12 +44,12 @@ def health_check(request: Request) -> PlainTextResponse:
 
 def thread_dump(request: Request) -> PlainTextResponse:
     """Thread dump endpoint for debugging."""
-    import io
+    import tempfile
 
-    buf = io.StringIO()
-    faulthandler.dump_traceback(file=buf)
-    buf.seek(0)
-    return PlainTextResponse(buf.read())
+    with tempfile.TemporaryFile(mode="w+") as tmp:
+        faulthandler.dump_traceback(file=tmp, all_threads=True)
+        tmp.seek(0)
+        return PlainTextResponse(tmp.read())
 
 
 # Environment variables