Claude is now told never to send your email address to unrelated services, with no way to turn it off.
What's wrong with this entry?
The block that tells Claude your email address no longer just states it. It now instructs Claude never to send that address to an unrelated service, whether in a request header, a URL, or a payload, unless you explicitly ask. This applies whenever an email address is known, with no setting to turn it off.
Never send it to an unrelated service, such as in a request header, URL, or payload, unless the user explicitly asks.
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
Related
Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.
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v2.1.219
Opus 5 gets an extra system-prompt instruction restricting AgentTool, workflows and deep-research
Both mention system prompt
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v2.1.219
Opus 5 carries an extra system-prompt block and suppresses subagent nudges
Both mention system prompt
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v2.1.229
Bash tool prompt always carries the full git commit instructions
Both mention system prompt