What was computed
RESOLVED (2 independent codes agree): divertor-alloy formation energy +0.015 eV/atom (LOCAL QE +0.0147 + GPU fleet +0.016) = NEAR-NEUTRAL / marginally unstable, NOT the prior -0.172. Weakens the composition-of-matter thermodynamic-stability basis; fleet dense-mesh confirming final digit
Reproduce this
# Reproduce BR-L2-A9 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-L2-A9 is anchored in the 2026-08-27 freeze spine (verdict: revised).