Unclear It is not stated which settings source or mode this filter applies to, so it is unclear which setups are affected.
What
Claude Code runs some settings through a filter in a restricted situation, keeping only certain values. That filter now keeps two fast mode settings that it used to drop:
fastMode, when it is set to false (fast mode turned off)fastModePerSessionOptIn, when it is set to true (people must turn fast mode on in each session)
Why
In the situation where this filter applies, turning fast mode off or requiring a per-session opt-in now takes effect instead of being lost.
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 stated which settings source or mode this filter applies to, so it is unclear which setups are affected.