Claude Code background agents now commit, push, and open draft PRs instead of stopping to ask

What this changes for operators

• Claude Code v2.1.198 makes subagents background by default and says background agents launched from claude agents now commit, push, and open a draft PR after worktree code work instead of stopping to ask.
• Before upgrading shared repos, decide whether background agents may write commits and branches, wire Notification hooks, and rely on branch protection rather than a human sitting at the terminal.