Engine preset helpers used by both the production
latexmlmath_oxide binary and by the test harness. Always
compiled — no test-only dependencies.
Reusable engine presets that don’t depend on the test harness.
Integration-test harness. Gated behind the test-utils feature
(default on) so the distribution build (cargo build --no-default-features --profile maxperf --bin latexml_oxide)
drops glob / phf from the dependency graph (audit DEP-02).