diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..f831f7f
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,26 @@
+name: CI
+
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+
+concurrency:
+  group: ci-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  ci:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v5
+
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          bundler-cache: true
+
+      - name: Run RuboCop
+        run: bundle exec rubocop
diff --git a/.gitignore b/.gitignore
index b04a8c8..f092e1e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,6 @@
 
 # rspec failure tracking
 .rspec_status
+
+# Local tooling config
+mise.toml
diff --git a/Gemfile.lock b/Gemfile.lock
index 1f44785..b911d6a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -45,6 +45,8 @@ GEM
       racc (~> 1.4)
     nokogiri (1.18.10-x86_64-darwin)
       racc (~> 1.4)
+    nokogiri (1.18.10-x86_64-linux-gnu)
+      racc (~> 1.4)
     octokit (10.0.0)
       faraday (>= 1, < 3)
       sawyer (~> 0.9)
@@ -113,7 +115,9 @@ GEM
 
 PLATFORMS
   arm64-darwin-24
+  arm64-darwin-25
   x86_64-darwin-24
+  x86_64-linux
 
 DEPENDENCIES
   irb