Source Intelligence

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.120

User Deny Rules Awareness in System Prompt

What

Claude is now informed about the user's configured permission deny rules and instructed to block circumvention attempts.

Details
  • The system prompt now includes a section listing all active deny rules
  • Claude is instructed to block actions that achieve the same effect via a different tool — e.g., using python -c, sed -i, cat >, heredocs, or similar to write a file that an Edit/Write deny rule covers
  • Only non-internal deny rules are surfaced (rules starting with a specific internal prefix are filtered out)
Evidence

New function builds deny rule text: "User Deny Rules: The user has configured these permission deny rules..." — search for "User Deny Rules"

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.120 →