Claude Code Ships 'ultracode', Dynamic Workflows, and Fallback Models

Releasebot (Anthropic release notes)·high signal

Anthropic's June 2026 Claude Code release adds an 'ultracode' setting (sets effort to xhigh and lets Claude auto-decide when to spin up a multi-agent workflow), dynamic workflows on by default for Max/Team/API users, model fallbacks, broader deny-rule glob support, and auto-loading of plugins from .claude/skills with a new /reload-skills command. For daily Claude Code users this is a meaningful autonomy and reliability jump — workflows and skills now activate without a marketplace or restart. Note: an Anthropic billing/credit change also lands June 15, 2026.