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Free guide · Claude & Claude Code

The Six-Month Audit: Find every instruction in your Claude setup that the new models outgrew

Anthropic's own team deleted 80% of Claude Code's system prompt when Opus 5 shipped and it got better. This is the audit that finds what yours should lose: 7 delete checks, 5 add checks, every one traceable to a line in Anthropic's live docs. Includes the installable skill and a paste-able version for anyone who does not use Claude Code.

Charlie Hills Added 7 August 2026 · Free

What’s inside

  1. 11. Why this exists
  2. 22. The one rule that keeps this working
  3. 33. The delete pass
  4. 44. The add pass
  5. 55. Three ways to run it
  6. 66. What happened when I ran it on mine
  7. 77. Tactics worth knowing

That’s the first part. The rest of this guide is free too.

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