Switch loop guard to author-based to survive interleaving auto-commits (#753)

Co-authored-by: Glenn Jocher <[email protected]>

action.yml

@@ -339,21 +339,22 @@ runs:
 
     # Commit Changes ---------------------------------------------------------------------------------------------------
     - name: Commit and Push Changes
-      if: (github.event_name == 'pull_request' || github.event_name == 'pull_request_target') && (github.event.action == 'opened' || github.event.action == 'synchronize')
+      # Skip when the triggering push came from the bot itself (a prior Auto-format push, or a sibling
+      # auto-commit workflow sharing the same token such as Auto-update Docs). github.actor is set by GitHub
+      # from the pushing token and cannot be spoofed via git config, so this breaks recursive auto-commit loops
+      # even when sibling bot commits or merge commits interleave between Auto-format pushes. Human pushes have a
+      # different actor and are always formatted. Default-GITHUB_TOKEN pushes never re-trigger workflows, so only
+      # PAT-authored bot pushes (actor == github_username) can recurse here.
+      if: |
+        (github.event_name == 'pull_request' || github.event_name == 'pull_request_target') &&
+        (github.event.action == 'opened' || github.event.action == 'synchronize') &&
+        github.actor != inputs.github_username
       env:
         GITHUB_USERNAME: ${{ inputs.github_username }}
         GITHUB_EMAIL: ${{ inputs.github_email }}
       run: |
         echo "::group::Commit and Push Changes"
         COMMIT_MSG="Auto-format by https://ultralytics.com/actions"
-        # Check if last two commits were both auto-format to prevent recursive loops
-        LAST_TWO=$(git log -2 --pretty=format:'%s' 2>/dev/null || echo "")
-        MATCH_COUNT=$(printf '%s\n' "$LAST_TWO" | grep -Fxc "$COMMIT_MSG" || true)
-        if [ "$MATCH_COUNT" -ge 2 ]; then
-          echo "Skipping commit: last two commits were auto-format"
-          echo "::endgroup::"
-          exit 0
-        fi
         git config --global user.name "$GITHUB_USERNAME"
         git config --global user.email "$GITHUB_EMAIL"
         git add .