ci: add Claude-powered documentation auto-update workflow

.github/workflows/update-docs.yml

@@ -0,0 +1,67 @@
+name: Update Documentation
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'packages/**'
+      - 'apps/**'
+      - 'templates/**'
+      - '!**/*.md'
+
+jobs:
+  update-docs:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 2
+
+      - name: Get changed files
+        id: changed
+        run: |
+          echo "files=$(git diff --name-only HEAD~1 HEAD | tr '\n' ' ')" >> $GITHUB_OUTPUT
+
+      - name: Run Claude Code
+        uses: anthropics/claude-code-action@beta
+        with:
+          anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
+          prompt: |
+            Analyze the recent code changes and update any relevant documentation.
+
+            Changed files: ${{ steps.changed.outputs.files }}
+
+            Tasks:
+            1. Read the changed files to understand what was modified
+            2. Check if any README files, doc pages, or code comments need updating
+            3. Update documentation to reflect the code changes
+            4. Keep docs concise and accurate
+
+            Focus on:
+            - API changes that affect usage examples
+            - New features that need documentation
+            - Changed behavior that affects existing docs
+            - Executor template documentation (templates/vercel-executor/README.md)
+            - Package READMEs in packages/
+
+            Only make changes if documentation is actually out of sync with code.
+            If no documentation updates are needed, do nothing.
+
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v5
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          commit-message: 'docs: auto-update documentation based on code changes'
+          title: 'docs: Auto-update documentation'
+          body: |
+            This PR was automatically generated by Claude Code to update documentation based on recent code changes.
+
+            Please review the changes before merging.
+          branch: auto-docs-update
+          delete-branch: true