From fa75e9a935e105d34eb82009379cb727419bde11 Mon Sep 17 00:00:00 2001
From: MilesCranmerBot <miles.cranmer.bot@gmail.com>
Date: Sat, 28 Mar 2026 14:28:18 +0000
Subject: [PATCH] ci: add commitlint workflow

Co-authored-by: Miles Cranmer <miles.cranmer@gmail.com>
---
 .github/workflows/commitlint.yml | 39 ++++++++++++++++++++++++++++++++
 commitlint.config.mjs            |  3 +++
 2 files changed, 42 insertions(+)
 create mode 100644 .github/workflows/commitlint.yml
 create mode 100644 commitlint.config.mjs

diff --git a/.github/workflows/commitlint.yml b/.github/workflows/commitlint.yml
new file mode 100644
index 00000000..28a52bd0
--- /dev/null
+++ b/.github/workflows/commitlint.yml
@@ -0,0 +1,39 @@
+name: commitlint
+
+on:
+  pull_request:
+    types:
+      - opened
+      - edited
+      - synchronize
+      - reopened
+
+permissions:
+  contents: read
+  pull-requests: read
+
+jobs:
+  pr-title:
+    name: PR title
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - uses: actions/setup-node@v6
+        with:
+          node-version: '22'
+      - name: Lint PR title
+        env:
+          PR_TITLE: ${{ github.event.pull_request.title }}
+        run: |
+          echo "$PR_TITLE" | npx --yes -p @commitlint/cli -p @commitlint/config-conventional commitlint --config commitlint.config.mjs
+
+  commits:
+    name: commits
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          fetch-depth: 0
+      - uses: wagoid/commitlint-github-action@v6
+        with:
+          configFile: commitlint.config.mjs
diff --git a/commitlint.config.mjs b/commitlint.config.mjs
new file mode 100644
index 00000000..0616fb93
--- /dev/null
+++ b/commitlint.config.mjs
@@ -0,0 +1,3 @@
+export default {
+  extends: ['@commitlint/config-conventional'],
+};