Assisted-by: Claude Opus 4.6 via Claude Code

diff --git a/.github/workflows/pages.yml b/.github/workflows/pages.yml
new file mode 100644
index 0000000..ec26dd2
--- /dev/null
+++ b/.github/workflows/pages.yml
@@ -0,0 +1,38 @@
+name: Pages
+
+on:
+  release:
+    types: [published]
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: pages
+  cancel-in-progress: true
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
+        with:
+          bundler-cache: true
+      - env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          mkdir -p gallery
+          gh release download "${{ github.event.release.tag_name }}" --pattern "snapshots.tar.gz" --output snapshots.tar.gz
+          tar xzf snapshots.tar.gz -C gallery
+          bundle exec rake "snapshots:gallery[gallery,gallery/index.html]"
+      - uses: actions/upload-pages-artifact@v3
+        with:
+          path: gallery
+      - id: deployment
+        uses: actions/deploy-pages@v4
diff --git a/Rakefile b/Rakefile
index af555ab..6fd85f2 100644
--- a/Rakefile
+++ b/Rakefile
@@ -170,6 +170,16 @@ namespace :snapshots do
     Rake::Task["snapshots:diff"].invoke
     system("open", File.join(Snapshots.cache_dir, "diff.html"))
   end
+
+  desc "Generate gallery HTML from images in a directory"
+  task :gallery, [:images_dir, :output_path] do |_t, args|
+    require "ketchup/snapshots"
+
+    images_dir = args.fetch(:images_dir)
+    output_path = args.fetch(:output_path)
+    Snapshots.generate_gallery_html(images_dir: images_dir, output_path: output_path)
+    puts output_path
+  end
 end
 
 task default: %i[ test binstubs ]