share thread context (strands-agents#1146)

Author: pgrayy

src/strands/_async.py

@@ -1,6 +1,7 @@
 """Private async execution utilities."""
 
 import asyncio
+import contextvars
 from concurrent.futures import ThreadPoolExecutor
 from typing import Awaitable, Callable, TypeVar
 
@@ -27,5 +28,6 @@ def execute() -> T:
         return asyncio.run(execute_async())
 
     with ThreadPoolExecutor() as executor:
-        future = executor.submit(execute)
+        context = contextvars.copy_context()
+        future = executor.submit(context.run, execute)
         return future.result()

tests_integ/tools/__init__.py

@@ -0,0 +1,47 @@
+import contextvars
+
+import pytest
+
+from strands import Agent, tool
+
+
+@pytest.fixture
+def result():
+    return {}
+
+
+@pytest.fixture
+def contextvar():
+    return contextvars.ContextVar("agent")
+
+
+@pytest.fixture
+def context_tool(result, contextvar):
+    @tool(name="context_tool")
+    def tool_():
+        result["context_value"] = contextvar.get("local_context")
+
+    return tool_
+
+
+@pytest.fixture
+def agent(context_tool):
+    return Agent(tools=[context_tool])
+
+
+def test_agent_invoke_context_sharing(result, contextvar, agent):
+    contextvar.set("shared_context")
+    agent("Execute context_tool")
+
+    tru_context = result["context_value"]
+    exp_context = contextvar.get()
+    assert tru_context == exp_context
+
+
+def test_tool_call_context_sharing(result, contextvar, agent):
+    contextvar.set("shared_context")
+    agent.tool.context_tool()
+
+    tru_context = result["context_value"]
+    exp_context = contextvar.get()
+    assert tru_context == exp_context