-A set MergeFriedel(false), and RotationScaleMerge builds one grouping for the
whole pass from it, so every decision on an anomalous rotation run was taken on
hand-separated groups: per-frame scaling, the correction surfaces, the outlier
median, the error model, the CC1/2 half-sets and the resolution cut, the
delta-CC1/2 frame ledger and the space-group search. That halves the
multiplicity each of those gates was calibrated at, and flipped the bare run's
symmetry, resolution and frame-rejection calls on several sets - none of them
through the anomalous signal (a 422 refused on an added-operator R, a 23
refused on a chi^2 gate, a screw row read on hand rows, thin hands exempt from
the outlier median letting one hot pair own a CC1/2 bin).
A rotation run now always merges with Friedel's law: the Rugnux constructor
turns MergeFriedel back on when the run is rotation (IsRotationIndexing, which
--force-still clears), and --mode scale does the same for its rotation merge.
Nothing is lost for anomalous use: the merge always keeps the Bijvoet split, and
I(+)/I(-), F(+)/F(-), SigAno and CCanom are written and reported from it
whether or not -A was given. -A on a rotation run is therefore a no-op on the
processing, which is the point; stills keep -A as their only anomalous route.
A bare run is untouched.
This is step 1 of the -A design (decide with pairs merged, present with them
split). The per-hand statistics table that -A should select is not built yet,
so an -A rotation run now reports the Friedel-merged table (FRIEDELS_LAW=
TRUE, Laue multiplicity and completeness). The thin-hand pair median of the
previous commit is unreachable from rugnux on rotation data but kept for any
direct MergeFriedel(false) caller of RotationScaleMerge.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013nW6FNRP1bBJJ8pfHiByAT
leonarski_fandClaude Opus 5
2e4196696c