What was computed
GPU fleet: CLOSED: centrepost life<->shield: WC 0->45cm cuts fast fluence 2.9e25->1.7e23/m2/fpy (life 0.003->0.58 fpy); centrepost = scheduled-replacement cartridge, breeding from outboard side
Reproduce this
# Reproduce BR-L1-A13b against the frozen record pip install kronos-toolkit # github.com/KronosFE/kronos-toolkit python -c "from kronos_toolkit.verify import run_regression; run_regression()" # BR-L1-A13b is anchored in the 2026-08-27 freeze spine (verdict: reproduced).