The previous job ran setup.{sh,bat} on the runner which downloaded Node.js +
3.4 GB of OpenClaw deps (clawdbot, @sliverp, node-llama-cpp), pushing the
Windows zip past GitHub's 2 GB single-file limit.
The portable folder is designed to fetch deps on first launch via setup.sh —
ship just the source skeleton (~1 MB) and let the user-side script populate
app/runtime + app/core/node_modules from China mirrors at first launch.
This also collapses portable-windows + portable-mac into one ubuntu-runner
job since the skeleton is platform-agnostic.
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