User-approved draft from the G-091 verification data: multishell.test's
~2m child wall is the -jobs floor (full-suite -jobs 8 = 2m16s); splitting
the long suites (multishell, dtplite, argparsingtest, scriptexec if
worthwhile; exec.test excluded as imported core material) along
shared-fixture boundaries targets no child wall above 45s and at least a
25% full-suite improvement, with name-level test conservation, provenance
lines travelling with moved tests, weight-table updates, and parity
gating. Context records the fixture-duplication tradeoff (total CPU up,
wall down) and the complementary lean-children candidate.
Assisted-by: harness=claude; primary-model=claude-fable-5; api-location=anthropic.com
Julian Noble