Create langsmith_smoketest.py

langsmith_smoketest.py

@@ -0,0 +1,28 @@
+# langsmith_smoketest.py
+
+import os
+from langsmith import traceable
+
+# 这个只是打印一下当前的 LangSmith 配置，方便 debug
+def print_langsmith_env():
+    keys = ["LANGSMITH_TRACING", "LANGSMITH_API_KEY", "LANGSMITH_PROJECT", "LANGSMITH_ENDPOINT"]
+    print("=== LangSmith env check ===")
+    for k in keys:
+        v = os.getenv(k)
+        print(f"{k} = {bool(v)} ({'set' if v else 'NOT set'})")
+    print("===========================")
+
+
+@traceable(run_type="chain", name="langsmith_smoke_test_chain")
+def fake_chain(x: int, y: int) -> int:
+    """
+    一个假的小链：只做加法，但会被 LangSmith 记录。
+    """
+    z = x + y
+    return z
+
+
+if __name__ == "__main__":
+    print_langsmith_env()
+    result = fake_chain(1, 2)
+    print(f"Result of fake_chain(1, 2) = {result}")