Cross-node artifact passing within a workflow manifest — nodes each run
in their own ephemeral container/pod with no shared filesystem, so an
agent node writing e.g. a verdict to /workspace/verdict is invisible to
a downstream kind: script node in the same manifest (found live
2026-09-06, bug-verify-sonnet's verdict-tx). The git task branch is the
only channel every node in a manifest actually shares: write to
scratchpad/, commit (picked up by finalize.sh's existing git add -A),
next node clones the same branch and reads it back.
scratchpad/ is scratch, never deliverable content, and must never
survive a merge into main — a CI gate in the target repo
(agent-runtimes .gitea/workflows/build-images.yaml,
no-scratchpad-in-main) is the hard backstop.
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