diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..6f4a420
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,12 @@
+# ~~ Generated by projen in mxr/base. Modifications will be overwritten on the next sync. To modify properly, edit .github/base.yml and retrigger the propagate workflow in mxr/base.
+*.egg-info/
+*.pyc
+.coverage
+.mypy_cache/
+.pytest_cache/
+.ruff_cache/
+.tox/
+.venv/
+/build/
+/dist/
+__pycache__/
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index d934916..afda451 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -19,6 +19,10 @@ repos:
   - id: mdformat
     args: [--number, --wrap, '120']
     additional_dependencies: [mdformat-footnote, mdformat-gfm, mdformat-gfm-alerts]
+- repo: https://github.com/lorenzwalthert/gitignore-tidy
+  rev: 1c69ff10567d7de6ce5e291ddf13c522a9007deb  # frozen: 0.1.3
+  hooks:
+  - id: tidy-gitignore
 - repo: https://github.com/macisamuele/language-formatters-pre-commit-hooks
   rev: 4380fbb73a154b5f5624794c1c78d9719ccc860f  # frozen: v2.16.0
   hooks: