release(py): 0.4.21 (#1986)

jacoblee93 · web-flow · commit 2310577eba59 · 2025-08-29T14:45:57.000-07:00
diff --git a/python/langsmith/__init__.py b/python/langsmith/__init__.py
@@ -21,7 +21,7 @@
 
 # Avoid calling into importlib on every call to __version__
 
-__version__ = "0.4.20"
+__version__ = "0.4.21"
 version = __version__  # for backwards compatibility
 
 
diff --git a/python/pyproject.toml b/python/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "langsmith"
-version = "0.4.20"
+version = "0.4.21"
 description = "Client library to connect to the LangSmith LLM Tracing and Evaluation Platform."
 authors = [
     {name = "LangChain", email = "support@langchain.dev"},
diff --git a/python/uv.lock b/python/uv.lock
