diff --git a/contrib/import-checker.py b/contrib/import-checker.py
--- a/contrib/import-checker.py
+++ b/contrib/import-checker.py
@@ -28,6 +28,7 @@
     'mercurial.hgweb.common',
     'mercurial.hgweb.request',
     'mercurial.i18n',
+    'mercurial.interfaces',
     'mercurial.node',
     # for revlog to re-export constant to extensions
     'mercurial.revlogutils.constants',
diff --git a/hgext/lfs/__init__.py b/hgext/lfs/__init__.py
--- a/hgext/lfs/__init__.py
+++ b/hgext/lfs/__init__.py
@@ -141,13 +141,16 @@
     minifileset,
     node,
     pycompat,
-    repository,
     revlog,
     scmutil,
     templateutil,
     util,
 )
 
+from mercurial.interfaces import (
+    repository,
+)
+
 from . import (
     blobstore,
     wireprotolfsserver,
diff --git a/hgext/lfs/wrapper.py b/hgext/lfs/wrapper.py
--- a/hgext/lfs/wrapper.py
+++ b/hgext/lfs/wrapper.py
@@ -21,7 +21,6 @@
     exchange,
     exthelper,
     localrepo,
-    repository,
     revlog,
     scmutil,
     upgrade,
@@ -30,6 +29,10 @@
     wireprotov1server,
 )
 
+from mercurial.interfaces import (
+    repository,
+)
+
 from mercurial.utils import (
     storageutil,
     stringutil,
diff --git a/hgext/narrow/__init__.py b/hgext/narrow/__init__.py
--- a/hgext/narrow/__init__.py
+++ b/hgext/narrow/__init__.py
@@ -17,6 +17,9 @@
 from mercurial import (
     localrepo,
     registrar,
+)
+
+from mercurial.interfaces import (
     repository,
 )
 
diff --git a/hgext/narrow/narrowbundle2.py b/hgext/narrow/narrowbundle2.py
--- a/hgext/narrow/narrowbundle2.py
+++ b/hgext/narrow/narrowbundle2.py
@@ -23,10 +23,12 @@
     localrepo,
     narrowspec,
     repair,
-    repository,
     util,
     wireprototypes,
 )
+from mercurial.interfaces import (
+    repository,
+)
 from mercurial.utils import (
     stringutil,
 )
diff --git a/hgext/narrow/narrowcommands.py b/hgext/narrow/narrowcommands.py
--- a/hgext/narrow/narrowcommands.py
+++ b/hgext/narrow/narrowcommands.py
@@ -25,12 +25,14 @@
     pycompat,
     registrar,
     repair,
-    repository,
     repoview,
     sparse,
     util,
     wireprototypes,
 )
+from mercurial.interfaces import (
+    repository,
+)
 
 table = {}
 command = registrar.command(table)
diff --git a/hgext/sqlitestore.py b/hgext/sqlitestore.py
--- a/hgext/sqlitestore.py
+++ b/hgext/sqlitestore.py
@@ -70,10 +70,12 @@
     mdiff,
     pycompat,
     registrar,
-    repository,
     util,
     verify,
 )
+from mercurial.interfaces import (
+    repository,
+)
 from mercurial.utils import (
     interfaceutil,
     storageutil,
diff --git a/mercurial/changegroup.py b/mercurial/changegroup.py
--- a/mercurial/changegroup.py
+++ b/mercurial/changegroup.py
@@ -25,8 +25,11 @@
     mdiff,
     phases,
     pycompat,
+    util,
+)
+
+from .interfaces import (
     repository,
-    util,
 )
 
 _CHANGEGROUPV1_DELTA_HEADER = struct.Struct("20s20s20s20s")
diff --git a/mercurial/exchange.py b/mercurial/exchange.py
--- a/mercurial/exchange.py
+++ b/mercurial/exchange.py
@@ -34,7 +34,6 @@
     phases,
     pushkey,
     pycompat,
-    repository,
     scmutil,
     sslutil,
     streamclone,
@@ -42,6 +41,9 @@
     util,
     wireprototypes,
 )
+from .interfaces import (
+    repository,
+)
 from .utils import (
     stringutil,
 )
diff --git a/mercurial/exchangev2.py b/mercurial/exchangev2.py
--- a/mercurial/exchangev2.py
+++ b/mercurial/exchangev2.py
@@ -22,8 +22,10 @@
     narrowspec,
     phases,
     pycompat,
+    setdiscovery,
+)
+from .interfaces import (
     repository,
-    setdiscovery,
 )
 
 def pull(pullop):
diff --git a/mercurial/filelog.py b/mercurial/filelog.py
--- a/mercurial/filelog.py
+++ b/mercurial/filelog.py
@@ -14,8 +14,10 @@
 )
 from . import (
     error,
+    revlog,
+)
+from .interfaces import (
     repository,
-    revlog,
 )
 from .utils import (
     interfaceutil,
diff --git a/mercurial/hg.py b/mercurial/hg.py
--- a/mercurial/hg.py
+++ b/mercurial/hg.py
@@ -39,7 +39,6 @@
     node,
     phases,
     pycompat,
-    repository as repositorymod,
     scmutil,
     sshpeer,
     statichttprepo,
@@ -51,6 +50,10 @@
     vfs as vfsmod,
 )
 
+from .interfaces import (
+    repository as repositorymod,
+)
+
 release = lock.release
 
 # shared features
diff --git a/mercurial/httppeer.py b/mercurial/httppeer.py
--- a/mercurial/httppeer.py
+++ b/mercurial/httppeer.py
@@ -16,12 +16,14 @@
 import weakref
 
 from .i18n import _
+from .interfaces import (
+    repository,
+)
 from . import (
     bundle2,
     error,
     httpconnection,
     pycompat,
-    repository,
     statichttprepo,
     url as urlmod,
     util,
diff --git a/mercurial/interfaces/__init__.py b/mercurial/interfaces/__init__.py
new file mode 100644
diff --git a/mercurial/repository.py b/mercurial/interfaces/repository.py
rename from mercurial/repository.py
rename to mercurial/interfaces/repository.py
--- a/mercurial/repository.py
+++ b/mercurial/interfaces/repository.py
@@ -7,11 +7,11 @@
 
 from __future__ import absolute_import
 
-from .i18n import _
-from . import (
+from ..i18n import _
+from .. import (
     error,
 )
-from .utils import (
+from ..utils import (
     interfaceutil,
 )
 
diff --git a/mercurial/localrepo.py b/mercurial/localrepo.py
--- a/mercurial/localrepo.py
+++ b/mercurial/localrepo.py
@@ -52,7 +52,6 @@
     phases,
     pushkey,
     pycompat,
-    repository,
     repoview,
     revset,
     revsetlang,
@@ -66,6 +65,11 @@
     util,
     vfs as vfsmod,
 )
+
+from .interfaces import (
+    repository,
+)
+
 from .utils import (
     interfaceutil,
     procutil,
diff --git a/mercurial/manifest.py b/mercurial/manifest.py
--- a/mercurial/manifest.py
+++ b/mercurial/manifest.py
@@ -24,10 +24,12 @@
     mdiff,
     policy,
     pycompat,
-    repository,
     revlog,
     util,
 )
+from .interfaces import (
+    repository,
+)
 from .utils import (
     interfaceutil,
 )
diff --git a/mercurial/narrowspec.py b/mercurial/narrowspec.py
--- a/mercurial/narrowspec.py
+++ b/mercurial/narrowspec.py
@@ -8,11 +8,13 @@
 from __future__ import absolute_import
 
 from .i18n import _
+from .interfaces import (
+    repository,
+)
 from . import (
     error,
     match as matchmod,
     merge,
-    repository,
     scmutil,
     sparse,
     util,
diff --git a/mercurial/revlog.py b/mercurial/revlog.py
--- a/mercurial/revlog.py
+++ b/mercurial/revlog.py
@@ -65,10 +65,12 @@
     mdiff,
     policy,
     pycompat,
-    repository,
     templatefilters,
     util,
 )
+from .interfaces import (
+    repository,
+)
 from .revlogutils import (
     deltas as deltautil,
     flagutil,
diff --git a/mercurial/revlogutils/constants.py b/mercurial/revlogutils/constants.py
--- a/mercurial/revlogutils/constants.py
+++ b/mercurial/revlogutils/constants.py
@@ -9,7 +9,7 @@
 
 from __future__ import absolute_import
 
-from .. import (
+from ..interfaces import (
     repository,
 )
 
diff --git a/mercurial/streamclone.py b/mercurial/streamclone.py
--- a/mercurial/streamclone.py
+++ b/mercurial/streamclone.py
@@ -12,13 +12,15 @@
 import struct
 
 from .i18n import _
+from .interfaces import (
+    repository,
+)
 from . import (
     cacheutil,
     error,
     narrowspec,
     phases,
     pycompat,
-    repository,
     store,
     util,
 )
diff --git a/mercurial/testing/storage.py b/mercurial/testing/storage.py
--- a/mercurial/testing/storage.py
+++ b/mercurial/testing/storage.py
@@ -17,6 +17,8 @@
 from .. import (
     error,
     mdiff,
+)
+from ..interfaces import (
     repository,
 )
 from ..utils import (
diff --git a/mercurial/utils/storageutil.py b/mercurial/utils/storageutil.py
--- a/mercurial/utils/storageutil.py
+++ b/mercurial/utils/storageutil.py
@@ -22,8 +22,8 @@
     error,
     mdiff,
     pycompat,
-    repository,
 )
+from ..interfaces import repository
 
 _nullhash = hashlib.sha1(nullid)
 
diff --git a/mercurial/wireprotov1peer.py b/mercurial/wireprotov1peer.py
--- a/mercurial/wireprotov1peer.py
+++ b/mercurial/wireprotov1peer.py
@@ -22,10 +22,12 @@
     error,
     pushkey as pushkeymod,
     pycompat,
-    repository,
     util,
     wireprototypes,
 )
+from .interfaces import (
+    repository,
+)
 from .utils import (
     interfaceutil,
 )
diff --git a/setup.py b/setup.py
--- a/setup.py
+++ b/setup.py
@@ -1067,6 +1067,7 @@
             'mercurial.cext',
             'mercurial.cffi',
             'mercurial.hgweb',
+            'mercurial.interfaces',
             'mercurial.pure',
             'mercurial.thirdparty',
             'mercurial.thirdparty.attr',
diff --git a/tests/notcapable b/tests/notcapable
--- a/tests/notcapable
+++ b/tests/notcapable
@@ -6,7 +6,8 @@
 fi
 
 cat > notcapable-$CAP.py << EOF
-from mercurial import extensions, localrepo, repository
+from mercurial import extensions, localrepo
+from mercurial.interfaces import repository
 def extsetup(ui):
     extensions.wrapfunction(repository.peer, 'capable', wrapcapable)
     extensions.wrapfunction(localrepo.localrepository, 'peer', wrappeer)
diff --git a/tests/pullext.py b/tests/pullext.py
--- a/tests/pullext.py
+++ b/tests/pullext.py
@@ -13,6 +13,8 @@
     error,
     extensions,
     localrepo,
+)
+from mercurial.interfaces import (
     repository,
 )
 
diff --git a/tests/simplestorerepo.py b/tests/simplestorerepo.py
--- a/tests/simplestorerepo.py
+++ b/tests/simplestorerepo.py
@@ -32,11 +32,13 @@
     localrepo,
     mdiff,
     pycompat,
-    repository,
     revlog,
     store,
     verify,
 )
+from mercurial.interfaces import (
+    repository,
+)
 from mercurial.utils import (
     cborutil,
     interfaceutil,
diff --git a/tests/test-check-interfaces.py b/tests/test-check-interfaces.py
--- a/tests/test-check-interfaces.py
+++ b/tests/test-check-interfaces.py
@@ -14,6 +14,9 @@
                     'test-repo']):
     sys.exit(80)
 
+from mercurial.interfaces import (
+    repository,
+)
 from mercurial.thirdparty.zope import (
     interface as zi,
 )
@@ -27,7 +30,6 @@
     localrepo,
     manifest,
     pycompat,
-    repository,
     revlog,
     sshpeer,
     statichttprepo,
diff --git a/tests/wireprotosimplecache.py b/tests/wireprotosimplecache.py
--- a/tests/wireprotosimplecache.py
+++ b/tests/wireprotosimplecache.py
@@ -10,12 +10,14 @@
 from mercurial import (
     extensions,
     registrar,
-    repository,
     util,
     wireprotoserver,
     wireprototypes,
     wireprotov2server,
 )
+from mercurial.interfaces import (
+    repository,
+)
 from mercurial.utils import (
     interfaceutil,
     stringutil,