Unclear What decides which version of the email wording a given session gets is not known.
What
Claude Code's instructions to Claude gain a new section named user_privacy. The text that tells Claude your email address now has two versions, chosen by a condition:
- New version: tells Claude to treat the address as private information and never share it with outside services without your explicit approval.
- Old version: the earlier wording, which mentions the User-Agent.
Separately, the built-in check that looks for an email address in what Claude sends to a tool now blocks the action instead of asking you. It also now spots %40, the encoded form of @ used in web addresses.
Why
Claude handles your email address more carefully, and an email address in a tool's input is now refused outright rather than put to you as a question.
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What decides which version of the email wording a given session gets is not known.