diff --git a/commitlint.config.mjs b/commitlint.config.mjs
new file mode 100644
index 0000000..31fc263
--- /dev/null
+++ b/commitlint.config.mjs
@@ -0,0 +1,15 @@
+import conventional from "@commitlint/config-conventional";
+
+export default {
+  ...conventional,
+  rules: {
+    "header-max-length": [2, "always", 80],
+    "body-max-line-length": [2, "always", 80],
+  },
+  ignores: [
+    // skip any commit whose body contains the Dependabot signature
+    (message) => message.includes("Signed‑off‑by: dependabot[bot]"),
+    // skip any Dependabot‑style bump header
+    (message) => /^chore\(deps(-dev)?\): bump /.test(message),
+  ],
+};