Claude Code fn hook/mod to block your email from the system prompt https://www.reddit.com/r/ClaudeAI/comments/1wyiw3k/you_put_my_what/

Else Opus loves to put it in request headers.

Note: on Team/Enterprise logins or machines with managed settings, an organization's policy may skip this mod's hooks. Run claude --debug and look for a no-email: prompt.context bypassed by ... line to check. (See #1.)