ci: Change Update A2A Types to use Pull Request instead of Push

Author: holtskinner

.github/workflows/update-a2a-types.yml

@@ -2,12 +2,15 @@ name: Update A2A Schema from Specification
 
 on:
   schedule:
-    - cron: "0 0 * * *"
+    - cron: '0 0 * * *'
   workflow_dispatch:
 
 jobs:
   check_and_update:
     runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
 
     steps:
       - name: Checkout code
@@ -16,7 +19,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: "3.13"
+          python-version: '3.13'
 
       - name: Install uv
         run: curl -LsSf https://astral.sh/uv/install.sh | sh
@@ -58,29 +61,56 @@ jobs:
             --use-standard-collections
           echo "Codegen finished."
 
-      - name: Commit and push if generated file changed
-        if: github.ref == 'refs/heads/main' # Or your default branch name
+      - name: Check for changes, commit, and push branch
+        id: commit_push_check
         run: |
           set -euo pipefail
 
           GENERATED_FILE="${{ steps.vars.outputs.GENERATED_FILE }}"
+          PR_BRANCH="auto-update/a2a-schema" # Define the branch name for the PR
+          COMMIT_MESSAGE="🤖 chore: Auto-update A2A schema from specification"
 
           # Check if the generated file has any changes compared to HEAD
           if git diff --quiet "$GENERATED_FILE"; then
             echo "$GENERATED_FILE has no changes after codegen. Nothing to commit."
+            echo "changes_detected=false" >> "$GITHUB_OUTPUT" # Set output to indicate no changes
           else
-            echo "Changes detected in $GENERATED_FILE. Committing..."
+            echo "Changes detected in $GENERATED_FILE."
+
             # Configure git user for the commit
             git config user.name "github-actions"
             git config user.email "github-actions@github.com"
 
+            # Create and switch to the PR branch
+            git checkout -B "$PR_BRANCH"
+
             # Add the generated file
             git add "$GENERATED_FILE"
 
             # Commit changes
-            git commit -m "🤖 chore: Auto-update A2A schema from specification"
+            git commit -m "$COMMIT_MESSAGE"
 
-            # Push changes
-            git push
-            echo "Changes committed and pushed."
+            # Push changes to the PR branch, overwrite if it exists
+            git push --force-with-lease --set-upstream origin "$PR_BRANCH"
+            echo "Changes committed and pushed to branch $PR_BRANCH."
+            echo "changes_detected=true" >> "$GITHUB_OUTPUT"
           fi
+
+      - name: Create Pull Request
+        if: steps.commit_push_check.outputs.changes_detected == 'true'
+        uses: peter-evans/create-pull-request@v6
+        with:
+          # Use the GITHUB_TOKEN provided by GitHub Actions
+          token: ${{ secrets.GITHUB_TOKEN }}
+          branch: auto-update/a2a-schema
+          base: main
+          title: '🤖 chore: Auto-update A2A schema from specification'
+          body: |
+            This PR was automatically generated by the GitHub Actions workflow `Update A2A Schema from Specification`.
+
+            It updates the `./src/a2a/types.py` file based on the latest schema specification available at:
+            https://raw.githubusercontent.com/google/A2A/refs/heads/main/specification/json/a2a.json
+
+          labels: |
+            automated pr
+            chore