Everything You Learned About CLAUDE.md Is Now Wrong (Anthropic Deleted 80% of Their Own Prompt)

Name: Everything You Learned About CLAUDE.md Is Now Wrong (Anthropic Deleted 80% of Their Own Prompt)
Uploaded: 2026-07-26T13:11:19+00:00
Description: Anthropic removed over 80% of Claude Code's system prompt for the Claude 5 generation models — and their coding evaluations didn't move. Then they published the rules they used. This is what those rules mean for the CLAUDE.md file sitting in your repo right now. I built a demo repo, wrote its CL...

Everything You Learned About CLAUDE.md Is Now Wrong (Anthropic Deleted 80% of Their Own Prompt)

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