diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 0000000..0919707
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,21 @@
+repos:
+  - repo: local
+    hooks:
+      - id: ruff
+        name: ruff
+        entry: python -m ruff check --fix
+        language: system
+        types: [python]
+
+      - id: mypy
+        name: mypy
+        entry: python -m mypy --ignore-missing-imports
+        language: system
+        files: ^hooks/protect_directories\.py$
+
+      - id: pytest
+        name: pytest
+        entry: python -m pytest tests/ -x -q
+        language: system
+        pass_filenames: false
+        always_run: true
diff --git a/hooks/protect_directories.py b/hooks/protect_directories.py
index 266216d..d104d5d 100755
--- a/hooks/protect_directories.py
+++ b/hooks/protect_directories.py
@@ -751,9 +751,9 @@ def get_bash_target_paths(command: str) -> list:
                 scan = i + 1
                 while scan < len(tokens) and tokens[scan] not in ("|", ";", "&", "&&", "||"):
                     arg = tokens[scan]
-                    if arg.startswith("--in-place"):
-                        has_inplace = True
-                    elif arg.startswith("-") and not arg.startswith("--") and "i" in arg[1:]:
+                    if arg.startswith("--in-place") or (
+                        arg.startswith("-") and not arg.startswith("--") and "i" in arg[1:]
+                    ):
                         has_inplace = True
                     if arg in ("-e", "-f"):
                         has_explicit_script = True
diff --git a/pyproject.toml b/pyproject.toml
index 8e1d429..b507d27 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,6 +31,7 @@ packages = []
 dev = [
     "pytest>=7.0",
     "pytest-cov>=4.0",
+    "pre-commit>=3.0",
 ]
 
 [tool.pytest.ini_options]