mutation-battery.sh injects each of the 14 required wrong behaviours into
the committed source, runs the one invariant test that must catch it, and
requires a non-zero exit (mutant killed), reverting via git after each.
Kills: kit-by-slot, captain-as-resourceId, chemistry-reconciled,
custom-regenerated, index-derived, stale-accepted, missing-fabricated,
faked-asset-id, duplicate-instance-collapse, PUT-as-slot-diff,
wire-id-in-canonical, projector-bypasses-shared-shaper, schema-version-
ignored, player-state-keyed-by-definition. 14/14 killed.
funman300