A precompute-compaction toggle is gated off by default and has no effect even if saved.
The new "Precompute compaction" settings toggle (precomputeCompactionEnabled) only appears in the settings list when the tengu_sepia_moth gate resolves true. The feature's own gate function independently re-checks tengu_sepia_moth before consulting the stored setting value, so a saved preference has no effect unless the gate is enabled.
tengu_sepia_moth Off in both readingsThe flag server returned off for the account this site reads and for the anonymous baseline. A reading of off cannot rule out a rollout these two readings sit outside of.
This account: off · anonymous baseline: off · compiled default in v2.1.260: off
These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.
Read once, for one account on one subscription tier, against v2.1.260. It isn't a statement about your account. What a flag value here can and cannot tell you