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Treat Cucumber Background as an architectural boundary: what belongs in it, how it fails, why silent skips can hide setup defects in CI, and when to move setup elsewhere.
The trade-off Packer (HCL2 templates, assuming a recent 1.10+ release) runs every build block in one template concurrently by default, with -parallel-builds available to cap or serialize them. The alternative is splitting images into separate templates and invoking packer build one at a time in the pipeline. The constraint is a single shared build host with