diff --git a/setup.py b/setup.py
--- a/setup.py
+++ b/setup.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# Copyright (C) 2019-2021  The Software Heritage developers
+# Copyright (C) 2022  The Software Heritage developers
 # See the AUTHORS file at the top-level directory of this distribution
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
diff --git a/swh/graphql/app.py b/swh/graphql/app.py
--- a/swh/graphql/app.py
+++ b/swh/graphql/app.py
@@ -1,3 +1,8 @@
+# Copyright (C) 2022 The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
 # import pkg_resources
 import os
 from pathlib import Path
diff --git a/swh/graphql/backends/archive.py b/swh/graphql/backends/archive.py
--- a/swh/graphql/backends/archive.py
+++ b/swh/graphql/backends/archive.py
@@ -1,3 +1,8 @@
+# Copyright (C) 2022 The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
 from swh.graphql import server
 
 
diff --git a/swh/graphql/errors/__init__.py b/swh/graphql/errors/__init__.py
--- a/swh/graphql/errors/__init__.py
+++ b/swh/graphql/errors/__init__.py
@@ -1,3 +1,8 @@
+# Copyright (C) 2022 The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
 from .errors import ObjectNotFoundError
 from .handlers import format_error
 
diff --git a/swh/graphql/errors/errors.py b/swh/graphql/errors/errors.py
--- a/swh/graphql/errors/errors.py
+++ b/swh/graphql/errors/errors.py
@@ -1,2 +1,8 @@
+# Copyright (C) 2022 The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
+
 class ObjectNotFoundError(Exception):
     """ """
diff --git a/swh/graphql/errors/handlers.py b/swh/graphql/errors/handlers.py
--- a/swh/graphql/errors/handlers.py
+++ b/swh/graphql/errors/handlers.py
@@ -1,3 +1,9 @@
+# Copyright (C) 2022 The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
+
 def format_error(error) -> dict:
     """
     Response error formatting
diff --git a/swh/graphql/middlewares/graphql.py b/swh/graphql/middlewares/graphql.py
--- a/swh/graphql/middlewares/graphql.py
+++ b/swh/graphql/middlewares/graphql.py
@@ -1,3 +1,8 @@
+# Copyright (C) 2022 The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
 """
 To implement graphql middleware
 """
diff --git a/swh/graphql/qns.txt b/swh/graphql/qns.txt
deleted file mode 100644
--- a/swh/graphql/qns.txt
+++ /dev/null
@@ -1,14 +0,0 @@
-Questions
-=========
-* Idea for a homogeneous ID for node (can we expose primary key from postgres)
-* Why the visit status is a paginated list in storage?, and not in v1
-* visit id should be visit number
-... Schema related questions 
-
-* What should we include in pageinfo (start token, haspreviouspage etc)
-* Query cost calculator logic (could be a bit complex)
-* Throttling based on Query cost calculator
-* Authentication and Authorization
-
-* Datetime as a time stamp
-* Other scalar types needed (swhid)
diff --git a/swh/graphql/resolvers/base_connection.py b/swh/graphql/resolvers/base_connection.py
--- a/swh/graphql/resolvers/base_connection.py
+++ b/swh/graphql/resolvers/base_connection.py
@@ -1,3 +1,8 @@
+# Copyright (C) 2022 The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
 from abc import ABC, abstractmethod
 from dataclasses import dataclass
 from typing import Optional, Type
diff --git a/swh/graphql/resolvers/base_node.py b/swh/graphql/resolvers/base_node.py
--- a/swh/graphql/resolvers/base_node.py
+++ b/swh/graphql/resolvers/base_node.py
@@ -1,3 +1,8 @@
+# Copyright (C) 2022 The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
 from abc import ABC
 from collections import namedtuple
 
diff --git a/swh/graphql/resolvers/content.py b/swh/graphql/resolvers/content.py
--- a/swh/graphql/resolvers/content.py
+++ b/swh/graphql/resolvers/content.py
@@ -1,3 +1,8 @@
+# Copyright (C) 2022 The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
 from swh.graphql.backends import archive
 
 from .base_node import BaseSWHNode
diff --git a/swh/graphql/resolvers/directory.py b/swh/graphql/resolvers/directory.py
--- a/swh/graphql/resolvers/directory.py
+++ b/swh/graphql/resolvers/directory.py
@@ -1,3 +1,8 @@
+# Copyright (C) 2022 The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
 from swh.graphql.backends import archive
 from swh.model.model import Directory
 
diff --git a/swh/graphql/resolvers/directory_entry.py b/swh/graphql/resolvers/directory_entry.py
--- a/swh/graphql/resolvers/directory_entry.py
+++ b/swh/graphql/resolvers/directory_entry.py
@@ -1,3 +1,8 @@
+# Copyright (C) 2022 The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
 from swh.graphql.backends import archive
 from swh.graphql.utils import utils
 
diff --git a/swh/graphql/resolvers/person.py b/swh/graphql/resolvers/person.py
--- a/swh/graphql/resolvers/person.py
+++ b/swh/graphql/resolvers/person.py
@@ -1,3 +1,8 @@
+# Copyright (C) 2022 The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
 from .base_node import BaseNode
 
 
diff --git a/swh/graphql/resolvers/release.py b/swh/graphql/resolvers/release.py
--- a/swh/graphql/resolvers/release.py
+++ b/swh/graphql/resolvers/release.py
@@ -1,3 +1,8 @@
+# Copyright (C) 2022 The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
 from swh.graphql.backends import archive
 
 from .base_node import BaseSWHNode
diff --git a/swh/graphql/resolvers/resolver_factory.py b/swh/graphql/resolvers/resolver_factory.py
--- a/swh/graphql/resolvers/resolver_factory.py
+++ b/swh/graphql/resolvers/resolver_factory.py
@@ -1,3 +1,8 @@
+# Copyright (C) 2022 The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
 from .content import ContentNode, TargetContentNode
 from .directory import DirectoryNode, RevisionDirectoryNode, TargetDirectoryNode
 from .directory_entry import DirectoryEntryConnection
diff --git a/swh/graphql/resolvers/resolvers.py b/swh/graphql/resolvers/resolvers.py
--- a/swh/graphql/resolvers/resolvers.py
+++ b/swh/graphql/resolvers/resolvers.py
@@ -1,3 +1,8 @@
+# Copyright (C) 2022 The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
 """
 High level resolvers
 Any schema attribute can be resolved by any of the following ways
diff --git a/swh/graphql/resolvers/revision.py b/swh/graphql/resolvers/revision.py
--- a/swh/graphql/resolvers/revision.py
+++ b/swh/graphql/resolvers/revision.py
@@ -1,3 +1,8 @@
+# Copyright (C) 2022 The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
 from swh.graphql.backends import archive
 from swh.graphql.utils import utils
 from swh.model.swhids import CoreSWHID, ObjectType
diff --git a/swh/graphql/resolvers/scalars.py b/swh/graphql/resolvers/scalars.py
--- a/swh/graphql/resolvers/scalars.py
+++ b/swh/graphql/resolvers/scalars.py
@@ -1,3 +1,8 @@
+# Copyright (C) 2022 The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
 from datetime import datetime
 
 from ariadne import ScalarType
diff --git a/swh/graphql/resolvers/snapshot.py b/swh/graphql/resolvers/snapshot.py
--- a/swh/graphql/resolvers/snapshot.py
+++ b/swh/graphql/resolvers/snapshot.py
@@ -1,3 +1,8 @@
+# Copyright (C) 2022 The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
 from swh.graphql.backends import archive
 from swh.graphql.utils import utils
 from swh.model.model import Snapshot
diff --git a/swh/graphql/resolvers/snapshot_branch.py b/swh/graphql/resolvers/snapshot_branch.py
--- a/swh/graphql/resolvers/snapshot_branch.py
+++ b/swh/graphql/resolvers/snapshot_branch.py
@@ -1,3 +1,8 @@
+# Copyright (C) 2022 The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
 from collections import namedtuple
 
 from swh.graphql.backends import archive
diff --git a/swh/graphql/resolvers/visit.py b/swh/graphql/resolvers/visit.py
--- a/swh/graphql/resolvers/visit.py
+++ b/swh/graphql/resolvers/visit.py
@@ -1,3 +1,8 @@
+# Copyright (C) 2022 The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
 from swh.graphql.backends import archive
 from swh.graphql.utils import utils
 
diff --git a/swh/graphql/resolvers/visit_status.py b/swh/graphql/resolvers/visit_status.py
--- a/swh/graphql/resolvers/visit_status.py
+++ b/swh/graphql/resolvers/visit_status.py
@@ -1,3 +1,8 @@
+# Copyright (C) 2022 The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
 from swh.graphql.backends import archive
 from swh.model.swhids import CoreSWHID, ObjectType
 
diff --git a/swh/graphql/tests/unit/resolvers/test_base_node.py b/swh/graphql/tests/unit/resolvers/test_base_node.py
--- a/swh/graphql/tests/unit/resolvers/test_base_node.py
+++ b/swh/graphql/tests/unit/resolvers/test_base_node.py
@@ -1,3 +1,8 @@
+# Copyright (C) 2022 The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
 """
 """
 
diff --git a/swh/graphql/tests/unit/resolvers/test_resolver_factory.py b/swh/graphql/tests/unit/resolvers/test_resolver_factory.py
--- a/swh/graphql/tests/unit/resolvers/test_resolver_factory.py
+++ b/swh/graphql/tests/unit/resolvers/test_resolver_factory.py
@@ -1,3 +1,8 @@
+# Copyright (C) 2022 The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
 import pytest
 
 from swh.graphql.resolvers import resolver_factory
@@ -5,7 +10,7 @@
 
 class TestFactory:
     @pytest.mark.parametrize(
-        "input_type, expexted",
+        "input_type, expected",
         [
             ("origin", "OriginNode"),
             ("visit", "OriginVisitNode"),
@@ -28,16 +33,16 @@
             ("dir-entry-file", "TargetContentNode"),
         ],
     )
-    def test_get_node_resolver(self, input_type, expexted):
+    def test_get_node_resolver(self, input_type, expected):
         response = resolver_factory.get_node_resolver(input_type)
-        assert response.__name__ == expexted
+        assert response.__name__ == expected
 
     def test_get_node_resolver_invalid_type(self):
         with pytest.raises(AttributeError):
             resolver_factory.get_node_resolver("invalid")
 
     @pytest.mark.parametrize(
-        "input_type, expexted",
+        "input_type, expected",
         [
             ("origins", "OriginConnection"),
             ("origin-visits", "OriginVisitConnection"),
@@ -49,9 +54,9 @@
             ("directory-entries", "DirectoryEntryConnection"),
         ],
     )
-    def test_get_connection_resolver(self, input_type, expexted):
+    def test_get_connection_resolver(self, input_type, expected):
         response = resolver_factory.get_connection_resolver(input_type)
-        assert response.__name__ == expexted
+        assert response.__name__ == expected
 
     def test_get_connection_resolver_invalid_type(self):
         with pytest.raises(AttributeError):
diff --git a/swh/graphql/tests/unit/resolvers/test_resolvers.py b/swh/graphql/tests/unit/resolvers/test_resolvers.py
--- a/swh/graphql/tests/unit/resolvers/test_resolvers.py
+++ b/swh/graphql/tests/unit/resolvers/test_resolvers.py
@@ -1,3 +1,8 @@
+# Copyright (C) 2022 The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
 import pytest
 
 from swh.graphql import resolvers
diff --git a/swh/graphql/tests/unit/utils/test_utils.py b/swh/graphql/tests/unit/utils/test_utils.py
--- a/swh/graphql/tests/unit/utils/test_utils.py
+++ b/swh/graphql/tests/unit/utils/test_utils.py
@@ -1,3 +1,8 @@
+# Copyright (C) 2022 The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
 import datetime
 
 from swh.graphql.utils import utils
diff --git a/swh/graphql/utils/utils.py b/swh/graphql/utils/utils.py
--- a/swh/graphql/utils/utils.py
+++ b/swh/graphql/utils/utils.py
@@ -1,3 +1,8 @@
+# Copyright (C) 2022 The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
 import base64
 from datetime import datetime
 from typing import List