Allow '/' as a namespace separator in dataset names

logfire/experimental/api_client.py

@@ -84,15 +84,19 @@ class MyOutput:
 """Sentinel to distinguish 'not provided' from explicit None."""
 
 
-_DATASET_NAME_RE = re.compile(r'^[a-zA-Z0-9][a-zA-Z0-9._-]*$')
+# Mirrors the platform's `DatasetName` Pydantic type. Allows `/` as a namespace separator
+# (e.g. `team-a/support-routing`) so datasets can be grouped by prefix in the Logfire UI; each
+# `/`-delimited segment must start with a letter or digit (no leading, trailing, or repeated slashes).
+_DATASET_NAME_RE = re.compile(r'^[a-zA-Z0-9][a-zA-Z0-9._-]*(/[a-zA-Z0-9][a-zA-Z0-9._-]*)*$')
 
 
 def _validate_dataset_name(name: str) -> None:
     """Validate that a dataset name is URL-safe."""
     if not _DATASET_NAME_RE.match(name):
         raise ValueError(
             f'Invalid dataset name {name!r}. '
-            'Names must start with a letter or digit and contain only letters, digits, dots, hyphens, and underscores.'
+            'Names must start with a letter or digit and contain only letters, digits, dots, hyphens, '
+            'underscores, and `/` (as a namespace separator, e.g. team-a/support-routing).'
         )
 
 

tests/test_datasets_client.py

@@ -409,6 +409,9 @@ def test_valid_names(self):
         _validate_dataset_name('a')
         _validate_dataset_name('123')
         _validate_dataset_name('test_dataset-1.0')
+        # `/` is allowed as a namespace separator between well-formed segments.
+        _validate_dataset_name('team-a/support-routing')
+        _validate_dataset_name('team-a/rag/retrieval')
 
     def test_invalid_names(self):
         with pytest.raises(ValueError, match='Invalid dataset name'):
@@ -417,8 +420,13 @@ def test_invalid_names(self):
             _validate_dataset_name('-starts-with-dash')
         with pytest.raises(ValueError, match='Invalid dataset name'):
             _validate_dataset_name('has spaces')
+        # A `/` must separate two well-formed segments: no leading, trailing, or repeated slashes.
         with pytest.raises(ValueError, match='Invalid dataset name'):
-            _validate_dataset_name('special/chars')
+            _validate_dataset_name('/leading-slash')
+        with pytest.raises(ValueError, match='Invalid dataset name'):
+            _validate_dataset_name('trailing-slash/')
+        with pytest.raises(ValueError, match='Invalid dataset name'):
+            _validate_dataset_name('double//slash')
 
 
 class TestPushDatasetHelpers: