What
Settings can set environment variables, which are named values that programs read when they start. Claude Code now filters out such variables when they come from a served folder that nobody has trusted, and it keeps track of whether it held any back.
A starting folder without a trust marking is also now treated as private by default.
Why
This appears to tighten what outside or shared settings can change in your environment without your trust.
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
It is not clear what a served folder is in practice, what triggers this filtering, or whether it is switched on for everyone.