diff --git a/my/arbtt.py b/my/arbtt.py
index e672e5b..02e06db 100644
--- a/my/arbtt.py
+++ b/my/arbtt.py
@@ -3,6 +3,7 @@
 '''
 
 REQUIRES = ['ijson', 'cffi']
+# NOTE likely also needs libyajl2 from apt or elsewhere?
 
 
 from pathlib import Path
diff --git a/my/coding/__init__.py b/my/coding/__init__.py
deleted file mode 100644
index e69de29..0000000
diff --git a/my/coding/codeforces.py b/my/coding/codeforces.py
index 1ac6ba4..3793988 100644
--- a/my/coding/codeforces.py
+++ b/my/coding/codeforces.py
@@ -1,7 +1,7 @@
 #!/usr/bin/env python3
 from my.config import codeforces as config
 
-from datetime import datetime
+from datetime import datetime, timezone
 from typing import NamedTuple
 import json
 from typing import Dict, Iterator
@@ -10,10 +10,6 @@ from ..core import get_files, Res, unwrap
 from ..core.compat import cached_property
 from ..core.konsume import ignore, wrap
 
-from kython import fget
-# TODO remove
-from kython.kdatetime import as_utc
-
 
 Cid = int
 
@@ -25,7 +21,7 @@ class Contest(NamedTuple):
     def make(cls, j) -> 'Contest':
         return cls(
             cid=j['id'],
-            when=as_utc(j['startTimeSeconds']),
+            when=datetime.fromtimestamp(j['startTimeSeconds'], tz=timezone.utc),
         )
 
 Cmap = Dict[Cid, Contest]
@@ -91,23 +87,4 @@ def iter_data() -> Iterator[Res[Competition]]:
 
 
 def get_data():
-    return list(sorted(iter_data(), key=fget(Competition.when)))
-
-
-def test():
-    assert len(get_data()) > 10
-
-
-def main():
-    for d in iter_data():
-        try:
-            d = unwrap(d)
-        except Exception as e:
-            print(f'ERROR! {d}')
-        else:
-            print(f'{d.when}: {d.summary}')
-
-
-
-if __name__ == '__main__':
-    main()
+    return list(sorted(iter_data(), key=Competition.when.fget))
diff --git a/my/coding/topcoder.py b/my/coding/topcoder.py
index 2577dd1..5711254 100644
--- a/my/coding/topcoder.py
+++ b/my/coding/topcoder.py
@@ -6,18 +6,14 @@ from typing import NamedTuple
 import json
 from typing import Dict, Iterator
 
-from ..core import get_files, Res, unwrap
+from ..core import get_files, Res, unwrap, Json
 from ..core.compat import cached_property
 from ..core.error import Res, unwrap
-
-# TODO get rid of fget?
-from kython import fget
 from ..core.konsume import zoom, wrap, ignore
 
 
-# TODO json type??
-def _get_latest() -> Dict:
-    pp = max(get_files(config.export_path, glob='*.json'))
+def _get_latest() -> Json:
+    pp = max(get_files(config.export_path))
     return json.loads(pp.read_text())
 
 
@@ -82,21 +78,5 @@ def iter_data() -> Iterator[Res[Competition]]:
 
 
 def get_data():
-    return list(sorted(iter_data(), key=fget(Competition.when)))
+    return list(sorted(iter_data(), key=Competition.when.fget))
 
-
-def test():
-    assert len(get_data()) > 10
-
-def main():
-    for d in iter_data():
-        try:
-            d = unwrap(d)
-        except Exception as e:
-            print(f'ERROR! {d}')
-        else:
-            print(d.summary)
-
-
-if __name__ == '__main__':
-    main()
diff --git a/my/fbmessenger/__init__.py b/my/fbmessenger/__init__.py
index 910d7a6..2e60d17 100644
--- a/my/fbmessenger/__init__.py
+++ b/my/fbmessenger/__init__.py
@@ -53,3 +53,7 @@ if legacy:
 REQUIRES = [
     'git+https://github.com/karlicoss/fbmessengerexport',
 ]
+
+
+# to prevent it from apprearing in modules list/doctor
+from ..core import __NOT_HPI_MODULE__
diff --git a/my/foursquare.py b/my/foursquare.py
index 7325f3c..b50ab0e 100755
--- a/my/foursquare.py
+++ b/my/foursquare.py
@@ -17,7 +17,7 @@ logger = LazyLogger(__name__)
 
 
 def inputs():
-    return get_files(config.export_path, '*.json')
+    return get_files(config.export_path)
 
 
 class Checkin:
@@ -61,7 +61,7 @@ class Place:
 def get_raw(fname=None):
     if fname is None:
         fname = max(inputs())
-    j = json.loads(Path(fname).read_text())
+    j = json.loads(fname.read_text())
     assert isinstance(j, list)
 
     for chunk in j:
diff --git a/my/jawbone/__init__.py b/my/jawbone/__init__.py
index 06cb262..28ef937 100755
--- a/my/jawbone/__init__.py
+++ b/my/jawbone/__init__.py
@@ -110,7 +110,7 @@ def pre_dataframe() -> Iterable[Res[SleepEntry]]:
     sleeps = load_sleeps()
     # todo emit error if graph doesn't exist??
     sleeps = [s for s in sleeps if s.graph.exists()] # TODO careful..
-    from ..common import group_by_key
+    from ..core.common import group_by_key
     for dd, group in group_by_key(sleeps, key=lambda s: s.date_).items():
         if len(group) == 1:
             yield group[0]
diff --git a/my/media/imdb.py b/my/media/imdb.py
index c7d5299..63531fe 100644
--- a/my/media/imdb.py
+++ b/my/media/imdb.py
@@ -3,12 +3,12 @@ import csv
 from datetime import datetime
 from typing import Iterator, List, NamedTuple
 
-from ..common import get_files
+from ..core import get_files
 
 from my.config import imdb as config
 
 def _get_last():
-    return max(get_files(config.export_path, glob='*.csv'))
+    return max(get_files(config.export_path))
 
 
 class Movie(NamedTuple):
diff --git a/my/roamresearch.py b/my/roamresearch.py
index 20a4391..0c1192f 100644
--- a/my/roamresearch.py
+++ b/my/roamresearch.py
@@ -17,7 +17,7 @@ logger = LazyLogger(__name__)
 
 
 def last() -> Path:
-    return max(get_files(config.export_path, '*.json'))
+    return max(get_files(config.export_path))
 
 
 class Keys:
diff --git a/tests/core.py b/tests/core.py
index 72c16ef..339f786 100644
--- a/tests/core.py
+++ b/tests/core.py
@@ -3,9 +3,9 @@ NOTE: Sigh. it's nice to be able to define the tests next to the source code (so
 However, if you run 'pytest --pyargs my.core', it detects 'core' package name (because there is no my/__init__.py)
 (see https://docs.pytest.org/en/latest/goodpractices.html#tests-as-part-of-application-code)
 
-This results in relative imports failing (e.g. from ..kython import...).
+This results in relative imports failing (e.g. from ..core import...).
 
-By using this helper file, pytest can detect the package name properly. A bit meh, but perhaps after kython is moved into the core,
+By using this helper file, pytest can detect the package name properly. A bit meh, but perhaps later,
 we can run against the tests in my.core directly.
 
 '''