diff --git a/.copier-answers.yml b/.copier-answers.yml
index 2501e12..17e75f3 100644
--- a/.copier-answers.yml
+++ b/.copier-answers.yml
@@ -1,9 +1,11 @@
 # Changes here will be overwritten by Copier
-_commit: 2.2.0
+_commit: 2.3.0
 _src_path: gh:DiamondLightSource/python-copier-template
 author_email: martin.gaughran@diamond.ac.uk
 author_name: Martin Gaughran
+component_lifecycle: experimental
 component_owner: group:default/sscc
+component_type: library
 description: A set of tools used for deploying applications to a shared filesystem.
 distribution_name: dls-deploy-tools
 docker: false
diff --git a/.github/CONTRIBUTING.md b/.github/CONTRIBUTING.md
index dc0c204..1706a87 100644
--- a/.github/CONTRIBUTING.md
+++ b/.github/CONTRIBUTING.md
@@ -24,4 +24,4 @@ It is recommended that developers use a [vscode devcontainer](https://code.visua
 
 This project was created using the [Diamond Light Source Copier Template](https://github.com/DiamondLightSource/python-copier-template) for Python projects.
 
-For more information on common tasks like setting up a developer environment, running the tests, and setting a pre-commit hook, see the template's [How-to guides](https://diamondlightsource.github.io/python-copier-template/2.2.0/how-to.html).
+For more information on common tasks like setting up a developer environment, running the tests, and setting a pre-commit hook, see the template's [How-to guides](https://diamondlightsource.github.io/python-copier-template/2.3.0/how-to.html).
diff --git a/.github/pages/make_switcher.py b/.github/pages/make_switcher.py
index 29f646c..c06813a 100755
--- a/.github/pages/make_switcher.py
+++ b/.github/pages/make_switcher.py
@@ -1,3 +1,5 @@
+"""Make switcher.json to allow docs to switch between different versions."""
+
 import json
 import logging
 from argparse import ArgumentParser
@@ -6,6 +8,7 @@
 
 
 def report_output(stdout: bytes, label: str) -> list[str]:
+    """Print and return something received frm stdout."""
     ret = stdout.decode().strip().split("\n")
     print(f"{label}: {ret}")
     return ret
@@ -52,14 +55,12 @@ def get_versions(ref: str, add: str | None) -> list[str]:
     return versions
 
 
-def write_json(path: Path, repository: str, versions: str):
+def write_json(path: Path, repository: str, versions: list[str]):
+    """Write the JSON switcher to path."""
     org, repo_name = repository.split("/")
-    pages_url = f"https://{org}.github.io"
-    if repo_name != f"{org}.github.io":
-        # Only add the repo name if it isn't the source for the org pages site
-        pages_url += f"/{repo_name}"
     struct = [
-        {"version": version, "url": f"{pages_url}/{version}/"} for version in versions
+        {"version": version, "url": f"https://{org}.github.io/{repo_name}/{version}/"}
+        for version in versions
     ]
     text = json.dumps(struct, indent=2)
     print(f"JSON switcher:\n{text}")
@@ -67,6 +68,7 @@ def write_json(path: Path, repository: str, versions: str):
 
 
 def main(args=None):
+    """Parse args and write switcher."""
     parser = ArgumentParser(
         description="Make a versions.json file from gh-pages directories"
     )
diff --git a/.gitignore b/.gitignore
index b69b75b..5eda15c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -55,6 +55,7 @@ cov.xml
 
 # Sphinx documentation
 docs/_build/
+docs/_api
 
 # PyBuilder
 target/
diff --git a/catalog-info.yaml b/catalog-info.yaml
index 5194d55..19eebb1 100644
--- a/catalog-info.yaml
+++ b/catalog-info.yaml
@@ -5,6 +5,6 @@ metadata:
   title: deploy-tools
   description: A set of tools used for deploying applications to a shared filesystem.
 spec:
-  type: documentation
+  type: library
   lifecycle: experimental
   owner: group:default/sscc
diff --git a/pyproject.toml b/pyproject.toml
index bbf1c4e..50dced3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -57,6 +57,7 @@ reportMissingImports = false               # Ignore missing stubs in imported mo
 strict = ["src"]
 exclude = ["src/deploy_tools/_version.py"]
 deprecateTypingAliases = true
+typeCheckingMode = "standard"
 
 [tool.pytest.ini_options]
 # Run pytest with all our checkers, and don't spam us with massive tracebacks on error
diff --git a/src/deploy_tools/__init__.py b/src/deploy_tools/__init__.py
index 26d23ba..a2ffbf3 100644
--- a/src/deploy_tools/__init__.py
+++ b/src/deploy_tools/__init__.py
@@ -1,3 +1,11 @@
+"""Top level API.
+
+.. data:: __version__
+    :type: str
+
+    Version number as calculated by https://github.com/pypa/setuptools_scm
+"""
+
 from ._version import __version__
 
 __all__ = ["__version__"]
diff --git a/tests/conftest.py b/tests/conftest.py
index d5cdd5f..ebe9c10 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,4 +1,5 @@
 import os
+from typing import Any
 
 import pytest
 
@@ -7,9 +8,14 @@
 if os.getenv("PYTEST_RAISE", "0") == "1":
 
     @pytest.hookimpl(tryfirst=True)
-    def pytest_exception_interact(call):
-        raise call.excinfo.value
+    def pytest_exception_interact(call: pytest.CallInfo[Any]):
+        if call.excinfo is not None:
+            raise call.excinfo.value
+        else:
+            raise RuntimeError(
+                f"{call} has no exception data, an unknown error has occurred"
+            )
 
     @pytest.hookimpl(tryfirst=True)
-    def pytest_internalerror(excinfo):
+    def pytest_internalerror(excinfo: pytest.ExceptionInfo[Any]):
         raise excinfo.value