Add PR preview deploys and evaluators registry

.github/workflows/preview.yml

@@ -0,0 +1,78 @@
+name: Deploy Preview
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+  push:
+    branches-ignore:
+      - main
+
+permissions:
+  contents: read
+  pull-requests: write
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  preview:
+    runs-on: ubuntu-latest
+    env:
+      HUGO_VERSION: 0.154.3
+    steps:
+      - name: Install Hugo
+        run: |
+          wget -O ${{ runner.temp }}/hugo.deb https://github.com/gohugoio/hugo/releases/download/v${HUGO_VERSION}/hugo_extended_${HUGO_VERSION}_linux-amd64.deb
+          sudo dpkg -i ${{ runner.temp }}/hugo.deb
+
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Build with Hugo
+        env:
+          HUGO_CACHEDIR: ${{ runner.temp }}/hugo_cache
+        run: |
+          hugo --minify --baseURL "https://agentevals-dev.github.io/website-preview/"
+
+      - name: Deploy to preview repo
+        uses: peaceiris/actions-gh-pages@v4
+        with:
+          personal_token: ${{ secrets.PREVIEW_DEPLOY_TOKEN }}
+          external_repository: agentevals-dev/website-preview
+          publish_branch: gh-pages
+          publish_dir: ./public
+
+      - name: Comment preview URL on PR
+        if: github.event_name == 'pull_request'
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const previewUrl = 'https://agentevals-dev.github.io/website-preview/';
+            const body = `🔗 **Preview deployed:** ${previewUrl}\n\nUpdated from commit ${context.sha.substring(0, 7)}`;
+
+            // Find existing bot comment
+            const comments = await github.rest.issues.listComments({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: context.issue.number,
+            });
+            const botComment = comments.data.find(c =>
+              c.user.type === 'Bot' && c.body.includes('Preview deployed')
+            );
+
+            if (botComment) {
+              await github.rest.issues.updateComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                comment_id: botComment.id,
+                body: body,
+              });
+            } else {
+              await github.rest.issues.createComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: context.issue.number,
+                body: body,
+              });
+            }