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The MC server was using a bare `docker build` command without any cross-run caching. Every CI build recompiled all Pumpkin cargo dependencies from scratch because BuildKit cache mounts are ephemeral on GitHub Actions runners. Switch to `@nx-tools/nx-container:build` executor with GHCR registry-based caching (cache-from/cache-to), matching the pattern already used by all Axum apps (discordsh, herbmail, memes, irc-gateway). Cargo-chef layers and dependency builds are now persisted between CI runs via the `:buildcache` tag.
This was referenced Feb 25, 2026
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atom-02250821-docker-cargo-cachedevThis PR was automatically created by the atomic branch workflow.