diff --git a/docs_source/conf.py b/docs_source/conf.py
index 77a8619c..84027802 100644
--- a/docs_source/conf.py
+++ b/docs_source/conf.py
@@ -19,6 +19,7 @@ import royalnet
 # -- Project information -----------------------------------------------------
 
 project = 'Royalnet'
+# noinspection PyShadowingBuiltins
 copyright = '2019, Stefano Pigozzi'
 author = 'Stefano Pigozzi'
 version = royalnet.__version__
diff --git a/royalnet/alchemy/alchemy.py b/royalnet/alchemy/alchemy.py
index 34964c6a..34b3abd7 100644
--- a/royalnet/alchemy/alchemy.py
+++ b/royalnet/alchemy/alchemy.py
@@ -2,7 +2,6 @@ from contextlib import contextmanager, asynccontextmanager
 from typing import *
 
 from sqlalchemy import create_engine
-from sqlalchemy.engine import Engine
 from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy.ext.declarative.api import DeclarativeMeta
 from sqlalchemy.orm import sessionmaker
@@ -12,10 +11,14 @@ from sqlalchemy.schema import Table
 from royalnet.alchemy.errors import TableNotFoundError
 from royalnet.utils import asyncify
 
+if TYPE_CHECKING:
+    # noinspection PyProtectedMember
+    from sqlalchemy.engine import Engine
+
 
 class Alchemy:
-    """A wrapper around :mod:`sqlalchemy.orm` that allows the instantiation of multiple engines at once while maintaining
-    a single declarative class for all of them."""
+    """A wrapper around :mod:`sqlalchemy.orm` that allows the instantiation of multiple engines at once while
+    maintaining a single declarative class for all of them."""
 
     def __init__(self, database_uri: str, tables: Set):
         """Create a new :class:`.Alchemy` object.
@@ -28,7 +31,7 @@ class Alchemy:
         if database_uri.startswith("sqlite"):
             raise NotImplementedError("sqlite databases aren't supported, as they can't be used in multithreaded"
                                       " applications")
-        self._engine: Engine = create_engine(database_uri)
+        self._engine: "Engine" = create_engine(database_uri)
         self._Base = declarative_base(bind=self._engine)
         self.Session: sessionmaker = sessionmaker(bind=self._engine)
         self._tables: Dict[str, Table] = {}
diff --git a/royalnet/backpack/tables/tokens.py b/royalnet/backpack/tables/tokens.py
index 16b82238..fa74a879 100644
--- a/royalnet/backpack/tables/tokens.py
+++ b/royalnet/backpack/tables/tokens.py
@@ -8,6 +8,7 @@ from sqlalchemy.orm import *
 import royalnet.utils as ru
 
 
+# noinspection PyAttributeOutsideInit
 class Token:
     __tablename__ = "tokens"
 
diff --git a/royalnet/commands/heraldevent.py b/royalnet/commands/heraldevent.py
index 504f3568..2883686a 100644
--- a/royalnet/commands/heraldevent.py
+++ b/royalnet/commands/heraldevent.py
@@ -1,8 +1,9 @@
+from typing import TYPE_CHECKING, Union
 import asyncio as aio
-from typing import TYPE_CHECKING
 
 if TYPE_CHECKING:
     from ..serf import Serf
+    from ..constellation import Constellation
 
 
 class HeraldEvent:
@@ -11,19 +12,19 @@ class HeraldEvent:
     name = NotImplemented
     """The event_name that will trigger this event."""
 
-    def __init__(self, serf: "Serf", config):
-        self.serf: "Serf" = serf
+    def __init__(self, parent: Union["Serf", "Constellation"], config):
+        self.parent: Union["Serf", "Constellation"] = parent
         self.config = config
 
     @property
     def alchemy(self):
-        """A shortcut for :attr:`.interface.alchemy`."""
-        return self.serf.alchemy
+        """A shortcut for :attr:`.parent.alchemy`."""
+        return self.parent.alchemy
 
     @property
     def loop(self) -> aio.AbstractEventLoop:
-        """A shortcut for :attr:`.interface.loop`."""
-        return self.serf.loop
+        """A shortcut for :attr:`.parent.loop`."""
+        return self.parent.loop
 
     async def run(self, **kwargs):
         raise NotImplementedError()
diff --git a/royalnet/constellation/constellation.py b/royalnet/constellation/constellation.py
index 576a43b9..ce712733 100644
--- a/royalnet/constellation/constellation.py
+++ b/royalnet/constellation/constellation.py
@@ -220,7 +220,7 @@ class Constellation:
         for SelectedEvent in events:
             # Initialize the event
             try:
-                event = SelectedEvent(serf=self, config=pack_cfg)
+                event = SelectedEvent(constellation=self, config=pack_cfg)
             except Exception as e:
                 log.error(f"Skipping: "
                           f"{SelectedEvent.__qualname__} - {e.__class__.__qualname__} in the initialization.")
diff --git a/royalnet/constellation/pagestar.py b/royalnet/constellation/pagestar.py
index e6a0b1ba..3efd8bde 100644
--- a/royalnet/constellation/pagestar.py
+++ b/royalnet/constellation/pagestar.py
@@ -1,7 +1,9 @@
+from abc import ABCMeta
+
 from .star import Star
 
 
-class PageStar(Star):
+class PageStar(Star, metaclass=ABCMeta):
     """A PageStar is a class representing a single route of the website (for example, ``/api/user/get``).
 
     To create a new website route you should create a new class inheriting from this class with a function overriding
diff --git a/royalnet/constellation/star.py b/royalnet/constellation/star.py
index 0de8e6ca..53ca57f5 100644
--- a/royalnet/constellation/star.py
+++ b/royalnet/constellation/star.py
@@ -1,5 +1,6 @@
 from typing import *
 
+import abc
 from starlette.requests import Request
 from starlette.responses import Response
 
@@ -10,7 +11,7 @@ if TYPE_CHECKING:
     import sqlalchemy.orm.session
 
 
-class Star:
+class Star(metaclass=abc.ABCMeta):
     """A Star is a class representing a part of the website.
 
     It shouldn't be used directly: please use :class:`PageStar` and :class:`ExceptionStar` instead!"""
@@ -19,6 +20,7 @@ class Star:
         self.constellation: "Constellation" = constellation
         self.config: "ConfigDict" = config
 
+    @abc.abstractmethod
     async def page(self, request: Request) -> Response:
         """The function generating the :class:`~starlette.Response` to a web :class:`~starlette.Request`.
 
diff --git a/royalnet/herald/response.py b/royalnet/herald/response.py
index 460fefc8..2b09d403 100644
--- a/royalnet/herald/response.py
+++ b/royalnet/herald/response.py
@@ -47,4 +47,8 @@ class ResponseFailure(Response):
         self.extra_info: Optional[dict] = extra_info
 
     def __repr__(self):
-        return f"{self.__class__.__qualname__}(name={self.name}, description={self.description}, extra_info={self.extra_info})"
+        return f"{self.__class__.__qualname__}(" \
+               f"name={self.name}, " \
+               f"description={self.description}, " \
+               f"extra_info={self.extra_info}" \
+               f")"
diff --git a/royalnet/serf/serf.py b/royalnet/serf/serf.py
index 9852ec99..57fa3766 100644
--- a/royalnet/serf/serf.py
+++ b/royalnet/serf/serf.py
@@ -285,7 +285,8 @@ class Serf(abc.ABC):
         finally:
             await data.session_close()
 
-    async def press(self, key: rc.KeyboardKey, data: rc.CommandData):
+    @staticmethod
+    async def press(key: rc.KeyboardKey, data: rc.CommandData):
         log.info(f"Calling key_callback: {repr(key)}")
         try:
             await key.press(data)
diff --git a/royalnet/utils/sentry.py b/royalnet/utils/sentry.py
index 4534f465..ac8f393e 100644
--- a/royalnet/utils/sentry.py
+++ b/royalnet/utils/sentry.py
@@ -40,6 +40,7 @@ def sentry_exc(exc: Exception,
         with sentry_sdk.configure_scope() as scope:
             scope.set_level(level.lower())
             sentry_sdk.capture_exception(exc)
+    # noinspection PyUnresolvedReferences,PyProtectedMember
     level_int: int = logging._nameToLevel[level.upper()]
     log.log(level_int, f"Captured {level.capitalize()}: {exc}")
     # If started in debug mode (without -O), raise the exception, allowing you to see its source