Owned scratch space for verification, replay, proof and recovery work done outside a Cook. Put those bytes here instead of an ad hoc path such as ~/Developer/artifacts or ~/.nr. Nothing can see or reclaim an ad hoc path.

dir=$(homeboy scratch allocate --owner '#17240' --purpose 'paired proof' --ttl 2d | jq -r .data.allocation.path)
homeboy scratch list
homeboy scratch pin <id> --reason 'evidence linked from #17240'
homeboy scratch unpin <id>
homeboy scratch release <id>

• allocate creates a directory under the runtime-temp root. Before the path is returned, its owner record holds the lease: owner (the issue, run or session), purpose, and expires_at (now plus --ttl, which defaults to 3d).
• list reports every allocation on this host, with its size and whether cleanup may remove it now.
• pin keeps an allocation past its TTL while a tracker or run still references it. unpin returns it to its TTL.
• release deletes an allocation immediately, whether or not it is pinned.

Allocations are runtime-temp owners with producer scratch. homeboy cleanup retained-storage reports them under runtime_tmp. Runtime-temp cleanup, including homeboy cleanup automatic-retention, keeps an allocation while it is unexpired or pinned, and removes it once its TTL has passed unpinned.

Scratch is local to the host that runs the command. On a runner, run it there: homeboy runner exec <runner> -- homeboy scratch allocate ....