A Reader who bookmarks a Series nobody holds yet no longer waits out the
poll queue for its artwork: the first Bookmark to create a Series fires
Store.OnSeriesCreated, and latest.Acquirer turns that into a single
series-page fetch yielding both the Latest Chapter and the cover URL. The
bytes are fetched through the gated cover fetcher and stored
content-addressed, so the wire carries an absolute URL on this
deployment's own origin (ADR-0007) - never a third-party address and
never one that 404s.
- series.cover_address (migration 0009) splits the third-party source
address the bytes came from (series.cover) from the content address
they are stored under. A blank cover_address is what "no Cover yet"
means, so the wire field is empty until real bytes exist.
- GET /covers/{address} serves the bytes publicly and uncredentialed,
immutable-cached; the address is gated by a 64-hex pattern and
cross-checked against a pure function of itself before any filesystem
read.
- Client-sent cover values are decoded and discarded permanently: the
cover columns are absent from Upsert's INSERT and its DO UPDATE, so no
request value can reach the shared Series row (extends ADR-0003's
"ignored after creation" to "ignored always", keeps ADR-0004's flat
wire so installed userscripts keep working).
- Acquisition is asynchronous and log-and-drop: the Reader's write
neither blocks on nor fails with a third-party Site. It is bounded by
a two-slot semaphore, cancelled at shutdown, and stamps
latest_checked_at so the poller does not refetch the same page a tick
later.
- store.CoverContentType canonicalises comix's non-standard "image/jpg"
to "image/jpeg", so one image cannot land under two spellings.
- PUBLIC_BASE_URL is a new required setting; Open rejects anything that
is not an absolute http(s) origin, since a bare hostname would start
cleanly and emit addresses no browser can load.
Verified against a live backend: bookmarking a comix series produced a
280x420 JPEG served from /covers/<sha256> with the immutable cache
header, and the web UI card renders that address.
sulthan