diff --git a/funnel/models/account.py b/funnel/models/account.py
index 9945a9986..57a47c28b 100644
--- a/funnel/models/account.py
+++ b/funnel/models/account.py
@@ -986,6 +986,7 @@ def ticket_followers(self) -> Query[Account]:
             'is_verified',
         },
     }
+    __json_datasets__ = ('primary', 'related')
 
     profile_state.add_conditional_state(
         'ACTIVE_AND_PUBLIC',
diff --git a/funnel/models/comment.py b/funnel/models/comment.py
index 0213ab45e..22507732e 100644
--- a/funnel/models/comment.py
+++ b/funnel/models/comment.py
@@ -383,6 +383,7 @@ class Comment(UuidMixin, BaseMixin[int, Account], Model):
         'json': {'created_at', 'urls', 'uuid_b58', 'absolute_url'},
         'minimal': {'created_at', 'uuid_b58'},
     }
+    __json_datasets__ = ('json',)
 
     def __init__(self, **kwargs) -> None:
         super().__init__(**kwargs)
diff --git a/funnel/models/helpers.py b/funnel/models/helpers.py
index a94f13109..d8c3a458d 100644
--- a/funnel/models/helpers.py
+++ b/funnel/models/helpers.py
@@ -140,15 +140,17 @@
 class IntTitle(DataclassFromType, int):
     """Integer value with a title (for enums)."""
 
-    title: str
+    # The empty default is required for Mypy's enum plugin's `Enum.__call__` analysis
+    title: str = ''
 
 
 @dataclass(frozen=True)
 class IntNameTitle(DataclassFromType, int):
     """Integer value with a name and title (for enums)."""
 
-    name: str
-    title: str
+    # The empty default is required for Mypy's enum plugin's `Enum.__call__` analysis
+    name: str = ''
+    title: str = ''
 
 
 @dataclass
diff --git a/funnel/models/notification.py b/funnel/models/notification.py
index f3df660fa..335b32386 100644
--- a/funnel/models/notification.py
+++ b/funnel/models/notification.py
@@ -735,7 +735,7 @@ def __init__(  # pylint: disable=super-init-not-called
         self.fragment_uuid = fragment.uuid if fragment is not None else None
         self.created_at = utcnow()
         self.created_by = user
-        self.created_by_id = cast(int, user.id) if user is not None else None
+        self.created_by_id = user.id if user is not None else None
 
     def __getattr__(self, attr: str) -> Any:
         """Get an attribute."""
diff --git a/funnel/views/notification.py b/funnel/views/notification.py
index bfdb9f14a..72a529365 100644
--- a/funnel/views/notification.py
+++ b/funnel/views/notification.py
@@ -9,7 +9,7 @@
 from email.utils import formataddr
 from functools import wraps
 from itertools import islice
-from typing import Any, ClassVar, Literal
+from typing import Any, ClassVar, Literal, cast
 from uuid import UUID, uuid4
 
 from flask import url_for
@@ -319,19 +319,21 @@ def fragments_order_by(self) -> list[sa.UnaryExpression]:
         ]
 
     @property
-    def fragments_query_options(self) -> list:  # TODO: full spec
+    def fragments_query_options(self) -> Sequence:
         """Provide a list of SQLAlchemy options for loading fragments."""
         return []
 
     @cached_property
-    def fragments(self) -> list[RoleAccessProxy[ModelUuidProtocol]]:
+    def fragments(
+        self,
+    ) -> list[RoleAccessProxy[ModelUuidProtocol]]:  # type: ignore[type-var]  # FIXME
         query = self.notification_recipient.rolledup_fragments()
         if query is None:
             return []
 
         query = query.order_by(*self.fragments_order_by)
-        if self.fragments_query_options:
-            query = query.options(*self.fragments_query_options)
+        if query_options := self.fragments_query_options:
+            query = query.options(*query_options)
 
         return [
             _f.access_for(actor=self.notification_recipient.recipient)
@@ -366,7 +368,7 @@ def web(self) -> str:
     @property
     def email_base_url(self) -> str:
         """Base URL for relative links in email."""
-        return self.notification.role_provider_obj.absolute_url
+        return cast(str, self.notification.role_provider_obj.absolute_url)
 
     def email_subject(self) -> str:
         """
diff --git a/funnel/views/notifications/proposal_notification.py b/funnel/views/notifications/proposal_notification.py
index 306e98843..9a13ec1c9 100644
--- a/funnel/views/notifications/proposal_notification.py
+++ b/funnel/views/notifications/proposal_notification.py
@@ -2,6 +2,8 @@
 
 from __future__ import annotations
 
+from collections.abc import Sequence
+
 from flask import render_template
 from werkzeug.utils import cached_property
 
@@ -76,7 +78,7 @@ def fragments_order_by(self) -> list[sa.UnaryExpression]:
         return [Proposal.datetime.desc()]
 
     @property
-    def fragments_query_options(self):
+    def fragments_query_options(self) -> Sequence:
         return [
             sa_orm.load_only(
                 Proposal.name, Proposal.title, Proposal.project_id, Proposal.uuid