What's wrong with this entry?
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What
A new CLAUDE_CODE_CHILD_SESSION environment variable that marks a session as a child session, suppressing certain persistence behaviors (e.g. session data is not persisted when this is set alongside other child-session conditions).
Evidence
New env var check (search for "CLAUDE_CODE_CHILD_SESSION")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.