- add edge/rpkgs-router.ts, which redirects PACKAGES, PACKAGES.gz and
PACKAGES.rds into …/src/contrib/<x.y>/ for slots listed in UNION_SLOTS
- leave tarballs alone: R keeps the pre-redirect contrib URL, so the union
index steers per-minor tarballs with a Path field instead
- stop resolving an unidentifiable distro to a phantom linux-gnu/linux-musl
slot and send those clients to CRAN
- mark every redirect no-store, since the target depends on the User-Agent
- cover the routing matrix in edge/rpkgs-router.test.ts, run by just edge-test
- correct the spec and plan: the union index carries Path: <x.y> on per-minor
records, not Path: .. on flat ones
- record that per-minor slots are unreachable from install.packages(), with
the measured size of the gap on alpine324 and noble
- choose a union index written by bincraft over an edge-side merge, and note
the two experiments that decide it (Path: .. resolves, gzcon does not read
concatenated members)
- scope the edge script to PACKAGES* only, gated on a UNION_SLOTS variable
- move the script into the repo as a bunnynet_compute_script applied by tofu
