What was computed
Per breeder: D 3.16 kg/yr, Li-6 17.1 kg/yr (~225 kg nat Li) [D]; net T 3.79 vs toolkit 3.836 (1.2%); He-3 ~207 kg/yr/burner = only scarce fuel
Reproduce this
# Reproduce ENV-A4 against the frozen record pip install kronos-toolkit # github.com/KronosFE/kronos-toolkit python -c "from kronos_toolkit.verify import run_regression; run_regression()" # ENV-A4 is anchored in the 2026-08-27 freeze spine (verdict: reproduced).