Each engine's tests carried its own copy of the job/shape helpers and
validation, and they had drifted: Gpt6Astra linked NestValidator.cs as
source (which stopped compiling once the host moved its checks into
NestLayoutCheck), the others referenced OpenNest.Benchmark. The kit
provides JobBuilder, Shapes, LayoutAssert (backed by the host's public
NestLayoutCheck) and EngineContractTests<TEngine>: quadrants, overflow,
oversize parts, lower-number priority, etch marks, sequential plate
indices, determinism, cancellation and stop reasons, for every engine.
Co-Authored-By: Codex <noreply@openai.com>
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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