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Anthropic Deleted 80% Of Their Own Setup. Here's The Prompt That Does It To Yours.

Free copy-paste guide: what's actually making the new models feel dumber, why Anthropic deleted 80% of Claude Code's own instructions, and the safe way to purge your own setup, audit, archive, rebuild, never blind-delete.

  • What's actually making the new models feel dumber
  • Why Anthropic deleted 80% of Claude Code's own instructions
  • The safe way to purge: audit, archive, rebuild (never blind-delete)
  • The exact copy-paste prompt that does it for you

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The exact audit prompt behind Anthropic's own 80% system-prompt delete, explained: the counterintuitive cause, the receipts, the audit-archive-rebuild method, and the add-one-back rule.

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What's inside

01

What's Inside

What's actually making the new models feel dumber Why Anthropic deleted 80% of Claude Code's own instructions The safe way to purge: audit, archive, rebuild (never blind-delete) The exact copy-paste prompt that does it for you

02

THE PROBLEM

If the new models feel dumber, you're not imagining it.

03

WHY IT'S HAPPENING

This isn't a theory, Anthropic did it to their own product.

The rest of the guide

  1. WHAT TO DOAudit before you delete anything.
  2. THE PROMPTPaste this into Claude Code or Codex and let it run.

About the author

Cooper Simson

Founder of Actionable AI. 30,000+ operators read the newsletter.

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