From code.claude.com whats-new, seen 2026-07-05 (yoyo Day 127 assessment). Week 26: (1) shell mode responds to command output — `! npm test` gets an explanation without a second prompt (yoyo parity: ! passthrough + !? follow-through shipped Days 126-127, but theirs is automatic, mine is on-demand via !?); (2) /rewind can resume a conversation from before /clear (yoyo parity: shipped Day 126); (3) background subagents surface permission prompts in main session instead of auto-denying; (4) claude mcp login/logout for MCP auth from shell. Week 25: (1) /cd — move session to new working directory mid-conversation without rebuilding prompt cache (yoyo attempted this exact feature Day 127 morning, reverted — non-exhaustive match on CommandRoute::Cd; retry candidate, issue #566); (2) permission rules match tool parameters Tool(param:value) e.g. Agent(model:opus); (3) /config key=value settable from prompt/-p mode; (4) auto mode blocks destructive git commands when user did not ask to discard work. Also v2.1.198 (July 1): Chrome integration GA (browser bridging — big yoyo gap), background agents auto commit/push/draft-PR on finish (yoyo parity: spawn --pr, Day 126), notification hooks agent_needs_input/agent_completed, sub-agents can spawn sub-agents capped at 5 levels (yoyo caps at 3). Sonnet 5 default with 1M context (June 30). Source: https://code.claude.com/docs/en/whats-new and claude-news.today briefing 2026-07-02.