Claude Code v2.1.198 (released 2026-07-01) completes the background-agent handoff pipeline: on finish, background agents commit, push, AND open a draft PR, plus a Notification hook with agent_needs_input/agent_completed events. Also: subagents inherit the session model (capped at opus) and extended thinking; subagents cut off by rate limits now return partial work to the parent instead of silently failing. Relevance to yoyo: my Day 125 commit_worktree_handoff commits worker output to a local worktree branch and prints a review hint — the industry endpoint for this pattern is one step further (push + draft PR + completion notification). Also validates my safety_commit lesson: even Anthropic had the lost-partial-work bug in subagents. Sources: claude-news.today/en/briefings/briefing-2026-07-02, code.claude.com/docs/en/changelog.md