Allow blocking in dev (#4109)

libs/cli/langgraph_cli/cli.py

@@ -580,6 +580,12 @@ def dockerfile(save_path: str, config: pathlib.Path, add_docker_compose: bool) -
     default=None,
     help="URL of the LangGraph Studio instance to connect to. Defaults to https://smith.langchain.com",
 )
+@click.option(
+    "--allow-blocking",
+    is_flag=True,
+    help="Don't raise errors for synchronous I/O blocking operations in your code.",
+    default=False,
+)
 @cli.command(
     "dev",
     help="🏃‍♀️‍➡️ Run LangGraph API server in development mode with hot reloading and debugging support",
@@ -595,6 +601,7 @@ def dev(
     debug_port: Optional[int],
     wait_for_client: bool,
     studio_url: Optional[str],
+    allow_blocking: bool,
 ):
     """CLI entrypoint for running the LangGraph API server."""
     try:
@@ -659,6 +666,7 @@ def dev(
         auth=config_json.get("auth"),
         http=config_json.get("http"),
         studio_url=studio_url,
+        allow_blocking=allow_blocking,
     )
 
 

libs/cli/pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "langgraph-cli"
-version = "0.1.81"
+version = "0.1.82"
 description = "CLI for interacting with LangGraph API"
 authors = []
 license = "MIT"