The SSR frontend's _origin() (canonical, og:url, og:image, robots, sitemap
<loc>) and the backend content API's _origin() (the jsonld url folded into
each payload) both trusted x-forwarded-proto / request.url.scheme. Behind
Caddy — which terminates TLS and reverse-proxies plain HTTP — those read
"http", so on the HTTPS-only public site every absolute URL emitted http://,
which 308-redirects to https://: canonicals self-conflict and the sitemap
lists redirecting URLs.
Take the scheme from the configured public origin (THERMOGRAPH_BASE_URL, set
per-host in the deploy env) when the request arrives on that host, so prod and
beta emit https. localhost and LAN dev never match the public host and keep the
observed scheme, so plain-HTTP development is unchanged; the frontend keeps its
X-Forwarded-Host precedence for the proxy-fallback path.
Tests assert canonical/og:url/og:image, robots Sitemap and every sitemap <loc>
are https for the public host (and via X-Forwarded-Host), that a LAN host stays
http, and that the backend payload's jsonld url is likewise https.
The three content handlers loaded the full ~45yr archive before checking the cache, so even hits paid the load. Restructure to resolve cell + compute content_token cheaply first, check the store, and load history only inside the miss-only build() closure. Cache hits and 304s now return without touching the archive. Keys/kinds/ETag unchanged.
Content pages keyed cache validity on the full-history hist_end, invalidating ~1-2x/day and paying a 45yr load even to compute the token. Add content_token(cell_id) = PAYLOAD_VER:CONTENT_VER:max_date, backed by an indexed MAX(date) (climate_store.history_max_date / climate.history_max_date), so it survives intra-day top-ups and needs no full-history load.
The gateway bot and APScheduler were long-lived stateful I/O loops running
inside the async web app under a leader election. They move into a single Go
binary that owns ONLY that I/O -- websocket, RESUME, heartbeat, backoff, timers.
It owns no grading logic. Anything needing data calls back over a new
internal-only surface (/internal/discord/grade, /internal/jobs/*). Grading
depends on polars and the parquet cache; reimplementing it in Go would let the
bot's grades drift from the API's. The grade route returns gateway-ready JSON
and Go relays the bytes verbatim.
The binary ships in the backend image and runs as a second compose service off
the same tag, so the two ends of the /internal/* contract can never skew.
deploy.sh rolls daemon alongside backend -- without that the service would never
be created, since a single-service deploy uses --no-deps. It also probes the
image first and skips the daemon when rolling a tag that predates the binary:
infra tracks main while image tags are env-staged, so a host can legitimately be
asked to roll an older backend image, and creating the service anyway would
leave a container crash-looping on a missing binary.
replicas: 1 with order: stop-first replaces the leader election -- Discord
permits one gateway connection per bot token.
THERMOGRAPH_INTERNAL_TOKEN is optional: both ends derive it from
THERMOGRAPH_AUTH_SECRET via HMAC under a domain-separation label, so this needs
no new vault entry. The derivation is pinned to a shared cross-language test
vector asserted on both sides, so drift fails CI instead of 401ing every call.
Fail closed when neither secret is set.
Improvements over the Python: a close intended for RESUME uses 4000 rather than
1000 (Discord invalidates a session closed 1000, so the old default defeated its
own resume); MESSAGE_CREATE runs on a bounded worker pool; and a malformed HELLO
returns an error rather than a clean reconnect, which would otherwise reset
backoff and hot-loop against the gateway.
365 Python tests pass; Go build/vet/test -race clean; shellcheck 0 findings.
