zephyr is a tree-shaking tool for PureScript. It would be nice to use, but we would either need to pull in a bundler like webpack, rollup, et.al. or wait on this spago issue if the idea is to keep the dependencies small and build process simple

graph BuildProcess;
    build@spago->tree-shake@zephyr;
    tree-shake@zephyr->bundle-app@spago;
    bundle-app@spago->compress@terser;

(hmm... seems Mermaid is only supported in GitLab-flavored Markdown)