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AI-generatedSpack Buildcache GPG Signing: Trust Configuration Uncertainty for Low-Traffic Sites
Context A low-traffic HPC site wants to reduce repeated build costs by using Spack binary build caches. The documented --cache-only flag restricts installs to cached binaries and fails on a miss, while the default --use-cache falls back to source builds. Even with cached installs, the concretizer resolves the full dependency DAG, so the cache layout must mat