| Name | Type | Description |
|---|---|---|
project_name* | str | LangSmith project name to look up. |
Fetch the LangSmith project URL via the LangSmith client.
Successful results are cached at module level so repeated calls do not make additional network requests.
The network call runs in a daemon thread with a hard timeout of
_LANGSMITH_URL_LOOKUP_TIMEOUT_SECONDS, so this function blocks the
calling thread for at most that duration even if LangSmith is unreachable.
Returns None (with a debug log) on any failure: missing langsmith package,
network errors, invalid project names, client initialization issues,
or timeouts.
