diff --git a/.copier-answers.yaml b/.copier-answers.yaml
index e25be07..7bd923b 100644
--- a/.copier-answers.yaml
+++ b/.copier-answers.yaml
@@ -1,5 +1,5 @@
 # Changes here will be overwritten by Copier
-_commit: 5ff720b
+_commit: '4372075'
 _src_path: https://github.com/python-project-templates/base.git
 add_docs: false
 add_extension: python
diff --git a/Makefile b/Makefile
index 3875db8..c59c50e 100644
--- a/Makefile
+++ b/Makefile
@@ -60,16 +60,16 @@ lint-py:  ## lint python with ruff
 	python -m ruff format --check verilator
 
 lint-docs:  ## lint docs with mdformat and codespell
-	python -m mdformat --check README.md
-	python -m codespell_lib README.md
+	python -m mdformat --check README.md $(wildcard docs/src)
+	python -m codespell_lib README.md $(wildcard docs/src)
 
 fix-py:  ## autoformat python code with ruff
 	python -m ruff check --fix verilator
 	python -m ruff format verilator
 
 fix-docs:  ## autoformat docs with mdformat and codespell
-	python -m mdformat README.md
-	python -m codespell_lib --write README.md
+	python -m mdformat README.md $(wildcard docs/src)
+	python -m codespell_lib --write README.md $(wildcard docs/src)
 
 lint: lint-py lint-docs  ## run all linters
 lints: lint
@@ -85,9 +85,9 @@ check-dist:  ## check python sdist and wheel with check-dist
 	check-dist -v
 
 check-types:  ## check python types with ty
-	ty check --python $$(which python)
+	python -m ty check
 
-checks: check-dist
+checks: check-dist check-types
 
 # Alias
 check: checks
diff --git a/pyproject.toml b/pyproject.toml
index 397fcf4..196a932 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -44,12 +44,14 @@ develop = [
     "codespell",
     "hatchling",
     "mdformat",
+    "mdformat-frontmatter",
     "mdformat-tables>=1",
     "pytest",
     "pytest-cov",
     "ruff",
     "twine",
     "ty",
+    "typer",
     "uv",
     "wheel",
 ]
@@ -102,7 +104,7 @@ skip = "*win32 *arm_64"
 [tool.coverage.run]
 branch = true
 omit = [
-    "verilator/tests/integration/",
+    "verilator/tests/integration/*",
 ]
 
 [tool.coverage.report]
diff --git a/verilator/cli.py b/verilator/cli.py
index e956445..56e6c4f 100644
--- a/verilator/cli.py
+++ b/verilator/cli.py
@@ -5,7 +5,6 @@
 from subprocess import Popen
 from sys import argv, exit, stderr, stdout
 from time import sleep
-from typing import List
 
 
 @lru_cache(maxsize=1)
@@ -61,16 +60,16 @@ def verilator(argv):
 
 
 def build(
-    input: List[str],
+    input: list[str],
     output: str = "obj_dir",
-    includes: List[str] = None,
+    includes: list[str] | None = None,
     timing: bool = True,
     trace: bool = True,
     assert_: bool = True,
     cc: bool = True,
     build: bool = True,
-    exe: str = None,
-    top_module: str = None,
+    exe: str | None = None,
+    top_module: str | None = None,
 ):
     """Utility to build a verilated module"""
     includes = includes or []