Auto rode in with the ice work rather than on its own evidence, and measured over
the 37-crystal rotation battery it does not carry itself yet. It TARGETS
correctly - it fires on ten crystals and every one is ice-positive, no failures,
no space-group changes - but it costs 1.35x the wall clock (median +3 s per
crystal, worst +29 s) and on the merge statistics it is the familiar sign-mixed
trade: high-shell CC1/2 worse on three of the four crystals that move materially,
mean -0.76.
The case for it is real but rests on agreement with a fixed external model - 43 %
of the ice bands' excess amplitude removed on smooth ice, the effect 7x stronger
inside the bands than outside - which is the better arbiter and also the narrower
one. That deserves settling on its own, not riding along with a set of ice
defaults. `--background-radial=auto` keeps it a flag away.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
leonarski_fandClaude Opus 5
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