What
Deny rules are permission settings that stop Claude Code from reading certain files. The check that applies them to reads has been split into two helpers. One tests whether a rule blocks a read. The other does the same and also tests whether any read-deny rules exist at all, reusing a ready-made list of rules when one is available. Files attached to a prompt are now checked through this second helper.
Why
This may change which attached files are blocked by deny rules. The old and new checks look very similar, so the visible effect may be small or none.
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 whether attachments are blocked any differently than before.