The host has known how to answer "is a newer build available for this box's
channel?" since the update-from-web-console work. The Linux client is about to
need the same answer from the same signed document, and a trust rule that lives
in two places is a trust rule that will drift.
So the parts where being wrong is a security bug now exist exactly once, in the
new `pf-update-check`: Ed25519 verification against pinned keys, the manifest
schema and its fail-closed validation, the post-redirect fetch, the version
comparison that has to reconcile four different canary spellings, and the
install-kind ladder — the last parameterised by which product is asking, since
the delivery channels are the same ones but the markers are not.
The pinned key list moves with them. Two lists could have disagreed about who
may announce a release, and the one that drifted is the one nobody would have
noticed; `publish-update-manifest.sh` follows to the new path, and a MISSING
keys file there is now fatal rather than a warning that silently skips the
cross-check the step exists to perform.
Host call sites are unchanged throughout: `store::index` and `update::manifest`
re-export from the shared crate under their old names, and `update::detect`
keeps its cached `detect()` and the host's command hints. Verified with clippy
-D warnings on Linux and on Windows (nvenc,amf-qsv,qsv), 340 host tests green.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
printf '%s' hands jq -R no line at all for an empty value; its empty output made
--argjson invalid. Seen on the first live canary-manifest run.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
(cherry picked from commit a12c8bc99d41c4f7b8e4c426d560171b2b12dd5e)
bash+openssl signer (raw-64-byte ed25519 over exact bytes, base64 .sig — the
plugin-index format) with the pinned-key cross-check, manifest-then-sig upload
order, and a live-feed self-verify. announce.yml re-hashes the installer against
its sidecar and fail-closes without UPDATE_MANIFEST_KEY; pre-release tags never
enter the stable feed. windows-host.yml grows a Linux canary-manifest job.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>