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Anthropic has removed the Ultraplan research preview. Research previews are experimental and may change or be removed based on feedback. The removal covers:
  • The /ultraplan command
  • The ultraplan keyword trigger
  • The No, refine with Ultraplan on Claude Code on the web option in the plan approval dialog
For planning workflows, use:
  • Plan mode: in your local session, have Claude research your codebase and present a plan for your approval before it makes any changes
  • Claude Code on the web: run Claude Code sessions in the cloud and review changes in your browser