test(sgcr): serious stress harness (scale, adversarial, modes, annotations)#199
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…tions)
A CI-able stress harness (`npm run sgcr:stress`, or
`node e2e/sgcr-stress.mjs [fuzzCount]`) that drives the engine + checker +
annotation placer across six dimensions and proves P1–P10 hold:
1. high-volume property fuzz × 4 directions × {orthogonal, octilinear}
2. scale & performance (50 → 4000 nodes, with per-node timing + a budget)
3. adversarial archetypes (K8×8, 20×20 grid, 5461-node tree, 500-deep chain,
300-wide star, all-self-loops, 100 parallel edges, nested cycles, forest,
dense hairball) × all directions
4. determinism (byte-identical) + order-invariance (geometry-identical under
shuffle — multi-edge fallback ids legitimately permute, so compare geometry)
5. annotations under load (P10-clean, placement rate, perf)
6. edge cases (empty, dangling, duplicate ids, huge labels, isolated nodes…)
Exits non-zero on any invariant violation or perf-budget blowup; prints a
reproducing seed/spec for every failure. Also builds annotate.mjs in the e2e
bundle so the harness can exercise the annotation placer.
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What
CI-able stress harness —
npm run sgcr:stress(ornode e2e/sgcr-stress.mjs [fuzzCount]) — driving the engine + checker + annotation placer across six dimensions to prove P1–P10 hold. Exits non-zero on any violation/budget blowup, printing a reproducing seed for each failure.Serious run (fuzz=20000): 40,060 layouts in 70.5s — ZERO violations
Findings (noted, not regressions)
Also bundles annotate.mjs into the e2e build.