diff --git a/piker/data/__init__.py b/piker/data/__init__.py
index 6c621248..95c47e19 100644
--- a/piker/data/__init__.py
+++ b/piker/data/__init__.py
@@ -39,9 +39,15 @@ from .feed import (
     open_feed,
 )
 from .flows import Flume
+from ._symcache import (
+    SymbologyCache,
+    open_symcache,
+    get_symcache,
+)
+from .types import Struct
 
 
-__all__ = [
+__all__: list[str] = [
     'Flume',
     'Feed',
     'open_feed',
@@ -53,4 +59,8 @@ __all__ = [
     'get_shm_token',
     'def_iohlcv_fields',
     'def_ohlcv_fields',
+    'open_symcache',
+    'get_symcache',
+    'SymbologyCache',
+    'Struct',
 ]
diff --git a/piker/data/_timeseries.py b/piker/data/_timeseries.py
index f43e0c73..c812e08a 100644
--- a/piker/data/_timeseries.py
+++ b/piker/data/_timeseries.py
@@ -225,7 +225,7 @@ def detect_null_time_gap(
     return None
 
 
-t_unit: Literal[
+t_unit: Literal = Literal[
     'days',
     'hours',
     'minutes',
diff --git a/piker/data/flows.py b/piker/data/flows.py
index 7776a602..652e1e71 100644
--- a/piker/data/flows.py
+++ b/piker/data/flows.py
@@ -31,7 +31,6 @@ import pendulum
 import numpy as np
 
 from ..accounting import MktPair
-from ._util import log
 from .types import Struct
 from ._sharedmem import (
     attach_shm_array,
@@ -233,5 +232,3 @@ class Flume(Struct):
             np.all(np.isin(vlm, -1))
             or np.all(np.isnan(vlm))
         )
-
-