diff --git a/Developers.md b/Developers.md
new file mode 100644
index 00000000..ca7fda93
--- /dev/null
+++ b/Developers.md
@@ -0,0 +1,21 @@
+Developers
+
+Install pre-commit (https://pre-commit.com/)
+
+```bash
+pip install pre-commit
+```
+
+Check that it's installed
+
+```bash
+pre-commit --versioni
+```
+
+This repository already has a pre-commit configuration. To install the hooks, run:
+
+```bash
+pre-commit install
+```
+
+Now when you make a git commit, the black code formatter and ruff linter will run.
diff --git a/requirements.txt b/requirements.txt
index b6a1d69a..2330d399 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -73,4 +73,6 @@ rich
 
 mkdocs
 mkdocs-material
-mkdocs-glightbox
\ No newline at end of file
+mkdocs-glightbox
+
+pre-commit