diff --git a/docs/usage/configuration/headings.md b/docs/usage/configuration/headings.md
index 63950206..467779e4 100644
--- a/docs/usage/configuration/headings.md
+++ b/docs/usage/configuration/headings.md
@@ -59,7 +59,6 @@ plugins:
 
 ## `parameter_headings`
 
-[:octicons-heart-fill-24:{ .pulse } Sponsors only](../../insiders/index.md){ .insiders } —
 [:octicons-tag-24: Insiders 1.6.0](../../insiders/changelog.md#1.6.0)
 
 - **:octicons-package-24: Type [`bool`][] :material-equal: `False`{ title="default value" }**
diff --git a/docs/usage/configuration/members.md b/docs/usage/configuration/members.md
index 119d8294..220a26fe 100644
--- a/docs/usage/configuration/members.md
+++ b/docs/usage/configuration/members.md
@@ -552,7 +552,6 @@ package
 
 ## `summary`
 
-[:octicons-heart-fill-24:{ .pulse } Sponsors only](../../insiders/index.md){ .insiders } —
 [:octicons-tag-24: Insiders 1.2.0](../../insiders/changelog.md#1.2.0)
 
 - **:octicons-package-24: Type <code><autoref identifier="bool" optional>bool</autoref> | <autoref identifier="dict" optional>dict</autoref>[<autoref identifier="str" optional>str</autoref>, <autoref identifier="bool" optional>bool</autoref>]</code>  :material-equal: `False`{ title="default value" }**
diff --git a/pyproject.toml b/pyproject.toml
index 2d5640c4..636a67fe 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,6 +25,7 @@ classifiers = [
     "Programming Language :: Python :: 3.14",
     "Topic :: Documentation",
     "Topic :: Software Development",
+    "Topic :: Software Development :: Documentation",
     "Topic :: Utilities",
     "Typing :: Typed",
 ]
diff --git a/src/mkdocstrings_handlers/python/handler.py b/src/mkdocstrings_handlers/python/handler.py
index aa690bca..0aac3cdc 100644
--- a/src/mkdocstrings_handlers/python/handler.py
+++ b/src/mkdocstrings_handlers/python/handler.py
@@ -104,6 +104,7 @@ class PythonHandler(BaseHandler):
         "show_docstring_yields": True,
         "show_source": True,
         "show_bases": True,
+        "show_inheritance_diagram": False,
         "show_submodules": False,
         "group_by_category": True,
         "heading_level": 2,
@@ -119,6 +120,7 @@ class PythonHandler(BaseHandler):
         "show_labels": True,
         "unwrap_annotated": False,
         "parameter_headings": False,
+        "modernize_annotations": False,
     }
     """Default handler configuration.
 
@@ -126,6 +128,7 @@ class PythonHandler(BaseHandler):
         find_stubs_package (bool): Whether to load stubs package (package-stubs) when extracting docstrings. Default `False`.
         allow_inspection (bool): Whether to allow inspecting modules when visiting them is not possible. Default: `True`.
         show_bases (bool): Show the base classes of a class. Default: `True`.
+        show_inheritance_diagram (bool): Show the inheritance diagram of a class using Mermaid. Default: `False`.
         show_source (bool): Show the source code of this object. Default: `True`.
         preload_modules (list[str] | None): Pre-load modules that are
             not specified directly in autodoc instructions (`::: identifier`).
@@ -200,6 +203,7 @@ class PythonHandler(BaseHandler):
         separate_signature (bool): Whether to put the whole signature in a code block below the heading.
             If Black is installed, the signature is also formatted using it. Default: `False`.
         unwrap_annotated (bool): Whether to unwrap `Annotated` types to show only the type without the annotations. Default: `False`.
+        modernize_annotations (bool): Whether to modernize annotations, for example `Optional[str]` into `str | None`. Default: `False`.
     """
 
     def __init__(
@@ -274,7 +278,7 @@ def load_inventory(
     ) -> Iterator[tuple[str, str]]:
         """Yield items and their URLs from an inventory file streamed from `in_file`.
 
-        This implements mkdocstrings' `load_inventory` "protocol" (see [`mkdocstrings.plugin`][mkdocstrings.plugin]).
+        This implements mkdocstrings' `load_inventory` "protocol" (see [`mkdocstrings.plugin`][]).
 
         Arguments:
             in_file: The binary file-like object to read the inventory from.
diff --git a/src/mkdocstrings_handlers/python/rendering.py b/src/mkdocstrings_handlers/python/rendering.py
index e3e9530f..a7ea38f7 100644
--- a/src/mkdocstrings_handlers/python/rendering.py
+++ b/src/mkdocstrings_handlers/python/rendering.py
@@ -612,7 +612,9 @@ def __init__(self, current_object: Object | Alias, config: dict[str, Any]) -> No
             config: The configuration dictionary.
         """
         self.current_object = current_object
+        """The current object being rendered."""
         self.config = config
+        """The configuration options."""
 
     def expand_identifier(self, identifier: str) -> str:
         """Expand an identifier.
diff --git a/src/mkdocstrings_handlers/python/templates/readthedocs/_base/language.html.jinja b/src/mkdocstrings_handlers/python/templates/readthedocs/_base/language.html.jinja
index 5b643726..1465471d 100644
--- a/src/mkdocstrings_handlers/python/templates/readthedocs/_base/language.html.jinja
+++ b/src/mkdocstrings_handlers/python/templates/readthedocs/_base/language.html.jinja
@@ -9,10 +9,10 @@
 
 {% set lang_pth = "languages/" ~ locale | get_template %}
 {% if lang_pth is existing_template %}
-    {% import lang_pth as lang %}
-    {% import "languages/en"|get_template as fallback %}
-    {% macro t(key) %}{{ lang.t(key) or fallback.t(key) }}{% endmacro %}
+  {% import lang_pth as lang %}
+  {% import "languages/en"|get_template as fallback %}
+  {% macro t(key) %}{{ lang.t(key) or fallback.t(key) }}{% endmacro %}
 {% else %}
-    {% import "languages/en"|get_template as lang %}
-    {% macro t(key) %}{{ lang.t(key) }}{% endmacro %}
+  {% import "languages/en"|get_template as lang %}
+  {% macro t(key) %}{{ lang.t(key) }}{% endmacro %}
 {% endif %}