The joint crystal + detector fit was committed only when the held-out residual
fell by at least a fixed 2 %. On a crystal whose geometry is already right
that bound cuts through the noise: two builds read 1.9 % and 2.05 % for the
same 0.03 px / 0.01 % move (lyso_x06da_half_image), one committed and the
other did not, and everything downstream (smoothing window, stretch
segmentation) followed the coin.
The bar is now the residual's own noise - the standard errors of the two
held-out means combined - which is the bar a round of the geometry walk
already has to clear (HeldOutResidualFell). The log line carries the joint
residual and that noise. Noise on the battery is 2-7 % of the residual, so
the gate is about as strict as before but no longer at a fixed edge.
Checked on 57 open/in-house sets and 11 private ones against the pool
battery. The verdict changed on 8 open/in-house sets besides the passes that
follow the 7ris/8pqd lattice change: half_image, 6qaj, lalanine, 8xtf, 9ig7,
8sqt (commit -> reject of a 1-step move) and myob_x06da_split, 6cdl (reject
-> commit). Merge statistics are equal to the last digit everywhere except
half_image (REFRES R_meas 1.16 -> 0.95, CC1/2 0.79 -> 0.86), 9ig7 (5 fewer
rejected observations) and 8xtf, whose stretch disposition followed the
coin: multiplicity 20.8 -> 15.6, R_meas 0.91 -> 0.60, R_free 0.193 -> 0.189,
REFMAC R_free 0.179 -> 0.176. Private arm unchanged.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01D1G8gJVAy6gp1K5Dz3NE5C
leonarski_fandClaude Opus 5.5
96b681e50d