Merge pull request 'Promote main to release: geocode P0 fix + ops tooling + privacy logging' (#53) from main into release

backend/api/content_routes.py

@@ -11,7 +11,7 @@ from fastapi import APIRouter, HTTPException, Request, Response
 
 from api import content_payloads as payloads
 from api import sitemap as sitemap_mod
-from api.payloads import history_token
+from api.payloads import content_token
 from data import climate
 from data import cities
 from data import grid
@@ -58,13 +58,21 @@ def _cached(request: Request, kind: str, cell_id: str, key: str, token: str, bui
     return _json_response(store.put_payload(kind, cell_id, key, token, payload), etag)
 
 
-def _resolve_city(slug: str):
+def _city_cell(slug: str):
-    """(city, cell, history) for a slug, or raise 404 (unknown) / 503 (warming) --
+    """(city, cell) for a slug, or raise 404 — both steps are cheap (a dict
-    mirrors web/content.py's _resolve_city."""
+    lookup and a pure grid snap) and, crucially, load no history, so the
+    derived-store token can be computed and a cache hit served without ever
+    touching the ~45-year archive."""
     city = cities.get(slug)
     if city is None:
         raise HTTPException(status_code=404, detail="Unknown city.")
-    cell = grid.snap(city["lat"], city["lon"])
+    return city, grid.snap(city["lat"], city["lon"])
+
+
+def _load_history(cell):
+    """The cell's ~45-year archive, or raise 503 while it's still warming --
+    the expensive load that used to run on every request. Now called only from
+    the content handlers' build() closures, i.e. only on a derived-store miss."""
     history = climate.load_cached_history(cell)
     if history is None or history.is_empty():
         try:
@@ -73,7 +81,7 @@ def _resolve_city(slug: str):
             history = None
     if history is None or history.is_empty():
         raise HTTPException(status_code=503, detail="Climate data is warming up; please retry shortly.")
-    return city, cell, history
+    return history
 
 
 def _origin(request: Request) -> str:
@@ -105,16 +113,17 @@ def content_home(request: Request):
 
 @router.get("/content/city/{slug}")
 def content_city(request: Request, slug: str):
-    city, cell, history = _resolve_city(slug)
+    city, cell = _city_cell(slug)
-    recent = None
+    token = content_token(cell["id"])
-    try:
-        recent = climate.get_recent_forecast(cell)
-    except Exception:  # noqa: BLE001 - today_vs_normal degrades to None
-        pass
-    token = history_token(history)
     origin = _origin(request)
 
     def build():
+        history = _load_history(cell)
+        recent = None
+        try:
+            recent = climate.get_recent_forecast(cell)
+        except Exception:  # noqa: BLE001 - today_vs_normal degrades to None
+            pass
         return payloads.city_payload(origin, BASE, city, history, recent)
 
     # origin is folded into the cache key (not just slug) because the payload's
@@ -131,10 +140,11 @@ def content_city(request: Request, slug: str):
 def content_city_month(request: Request, slug: str, month: str):
     if month not in payloads.MONTH_INDEX:
         raise HTTPException(status_code=404, detail="Unknown month.")
-    city, cell, history = _resolve_city(slug)
+    city, cell = _city_cell(slug)
-    token = history_token(history)
+    token = content_token(cell["id"])
 
     def build():
+        history = _load_history(cell)
         return payloads.month_payload(BASE, city, history, payloads.MONTH_INDEX[month])
 
     return _cached(request, "content-month", cell["id"], f"{slug}:{month}", token, build)
@@ -142,11 +152,12 @@ def content_city_month(request: Request, slug: str, month: str):
 
 @router.get("/content/city/{slug}/records")
 def content_city_records(request: Request, slug: str):
-    city, cell, history = _resolve_city(slug)
+    city, cell = _city_cell(slug)
-    token = history_token(history)
+    token = content_token(cell["id"])
     origin = _origin(request)
 
     def build():
+        history = _load_history(cell)
         return payloads.records_payload(origin, BASE, city, history)
 
     # See content_city's comment: origin folded into the cache key for the

backend/api/payloads.py

@@ -73,6 +73,30 @@ def history_token(history) -> str:
     return f"{PAYLOAD_VER}:{hist_end(history)}"
 
 
+# The content-shape version for the SEO content pages (/climate/<city>[/month|
+# /records]). Kept separate from PAYLOAD_VER so a content-only shape change need
+# not orphan every other kind's cache, and vice-versa. Bump on change.
+CONTENT_VER = "c1"
+
+
+def content_token(cell_id: str) -> str:
+    """Validity for the SEO content-page payloads — cheap AND stable.
+
+    Unlike history_token, this never loads the ~45-year archive: it keys on the
+    cell's newest archived DATE (climate.history_max_date — an indexed
+    ``MAX(date)`` on Postgres, a single-column read on the parquet backend), so it
+    survives the hourly tail top-ups (which only refresh intra-day freshness) and
+    turns over only when the archive's last day genuinely advances (≈1×/day). That
+    keeps content pages ≤1 day stale — acceptable for SEO — while sparing every
+    request the full-history load the old token forced even on a cache hit.
+    Fail-soft: a store/DB error yields a 'none' bucket rather than raising."""
+    try:
+        max_date = climate.history_max_date(cell_id)
+    except Exception:  # noqa: BLE001 - token computation must never fail a request
+        max_date = None
+    return f"{PAYLOAD_VER}:{CONTENT_VER}:{max_date or 'none'}"
+
+
 def recent_token(history, cell_id: str) -> str:
     """Validity for payloads that also grade the hourly recent/forecast bundle."""
     return f"{history_token(history)}:{climate.recent_stamp(cell_id)}"

backend/core/metrics.py

@@ -96,6 +96,12 @@ def classify_inbound(path: str, base: str = "") -> str:
     the app's mount prefix (e.g. ``/thermograph`` or ``""``).
     """
     p = path or "/"
+    # The liveness probe (Dockerfile HEALTHCHECK, Caddy health_uri) is by far the
+    # highest-volume single path in prod (measured ~47% of the access log) and is
+    # never real traffic — same posture as the metrics check below. Never under
+    # BASE (see /healthz's own docstring in web/app.py), so check before stripping.
+    if p.rstrip("/") == "/healthz":
+        return "health"
     # The dashboard polls the metrics endpoint; never count it as traffic, whatever base
     # prefix it arrives under — e.g. a `/thermograph/api/v2/metrics` probe against a
     # root-served prod app would otherwise land in "other" and show as an inbound error.
@@ -118,6 +124,13 @@ def classify_inbound(path: str, base: str = "") -> str:
         # category keeps record_inbound from double-counting every interaction.
         if seg == "event":
             return "event"
+        # The SSR content API (backend/api/content_routes.py) is called only by
+        # the frontend_ssr service's own api_client.py, never by a browser — a
+        # server-to-server hop, not a page view. Its own category is what lets
+        # that (measured ~32% of the access log on prod) be excluded from the
+        # access log below without also hiding real external traffic.
+        if seg == "content":
+            return "internal"
         return f"api:{seg}" if seg else "api:other"
     if p.endswith((".js", ".css", ".html", ".webmanifest", ".png", ".svg", ".ico",
                    ".json", ".woff", ".woff2", ".map", ".txt", ".xml")):

backend/data/climate.py

@@ -862,6 +862,30 @@ def recent_stamp(cell_id: str) -> int:
         return 0
 
 
+def history_max_date(cell_id: str) -> "str | None":
+    """ISO date (YYYY-MM-DD) of the cell's newest cached archived day, or None when
+    nothing is cached — read WITHOUT loading the full multi-decade history.
+
+    Backs the content-page cache token (api/payloads.content_token). On Postgres
+    it's an indexed ``MAX(date)`` over climate_history; on the parquet backend it's
+    the max of the cached file's date column (a single columnar read via
+    ``scan_parquet``, not a full frame load). Fail-soft: any error reads as None."""
+    if climate_store.is_postgres():
+        return climate_store.history_max_date(cell_id)
+    path = _cache_path(cell_id)
+    if not os.path.exists(path):
+        return None
+    try:
+        val = pl.scan_parquet(path).select(pl.col("date").max()).collect().item()
+        if val is None:
+            return None
+        if isinstance(val, datetime.datetime):  # older files stored date as Datetime
+            val = val.date()
+        return val.isoformat()
+    except Exception:  # noqa: BLE001 - a corrupt/absent cache reads as no max date
+        return None
+
+
 def get_recent_forecast(cell: dict) -> pl.DataFrame:
     """Recent observations + forward forecast, with humidity as absolute humidity
     (g/m³). Thin wrapper over the raw loader (see below)."""
@@ -985,10 +1009,13 @@ _REVGEO_CACHE: dict[str, str | None] = {}
 _REVGEO_MIN_INTERVAL = 1.1   # seconds between successive Nominatim reverse calls
 _revgeo_last = 0.0
 
-_REVGEO_QUEUE: "queue.Queue[tuple[float, float, str, concurrent.futures.Future]]" = queue.Queue()
+_REVGEO_QUEUE: "queue.Queue[tuple]" = queue.Queue()
 _REVGEO_WORKER_LOCK = threading.Lock()
 _revgeo_worker_started = False
 _REVGEO_WAIT_TIMEOUT = 10.0   # seconds a caller waits for ITS OWN request before giving up
+_GEOCODE_WAIT_TIMEOUT = 35.0  # forward /geocode is a deliberate user search, not a map-pan
+                              # enrichment -- worth a longer wait than reverse geocoding's,
+                              # covering the 30s per-request timeout plus queue wait.
 
 
 def reverse_geocode_cached(lat: float, lon: float) -> tuple[bool, str | None]:
@@ -1041,31 +1068,46 @@ def _fetch_revgeo_label(lat: float, lon: float) -> str | None:
 
 
 def _revgeo_worker() -> None:
-    """Drains _REVGEO_QUEUE one request at a time, forever. The sole caller of
+    """Drains _REVGEO_QUEUE one job at a time, forever — both reverse ("revgeo")
-    _fetch_revgeo_label, so the ~1/sec pacing below is enforced just by doing the
+    and forward ("geocode") jobs, so the ~1/sec pacing below is enforced just by
-    work serially — no lock needed, since nothing else ever touches Nominatim.
+    doing the work serially on this one thread, no lock needed, since nothing
-    Re-checks the cache before fetching (a request queued behind an identical one
+    else ever touches Nominatim. Reverse jobs re-check the cache before fetching
-    is answered from what the earlier request just cached, no duplicate call),
+    (a request queued behind an identical one is answered from what the earlier
-    and always finishes the fetch + persists the result even if the original
+    request just cached, no duplicate call) and always finish + persist even if
-    caller already gave up waiting (see reverse_geocode's timeout)."""
+    the original caller already gave up waiting (see reverse_geocode's timeout).
+    Forward jobs have no cache (see geocode_nominatim) but share the same pacer."""
     global _revgeo_last
     while True:
-        lat, lon, key, fut = _REVGEO_QUEUE.get()
+        job = _REVGEO_QUEUE.get()
+        kind = job[0]
         try:
-            found, label = reverse_geocode_cached(lat, lon)
+            if kind == "revgeo":
-            if not found:
+                _, lat, lon, key, fut = job
+                found, label = reverse_geocode_cached(lat, lon)
+                if not found:
+                    wait = _REVGEO_MIN_INTERVAL - (time.monotonic() - _revgeo_last)
+                    if wait > 0:
+                        time.sleep(wait)
+                    label = _fetch_revgeo_label(lat, lon)
+                    _revgeo_last = time.monotonic()
+                    _REVGEO_CACHE[key] = label
+                    store.put_revgeo(key, label)   # survive restarts (a None label retries after its TTL)
+                if not fut.done():
+                    fut.set_result(label)
+            else:  # "geocode"
+                _, name, count, fut = job
                 wait = _REVGEO_MIN_INTERVAL - (time.monotonic() - _revgeo_last)
                 if wait > 0:
                     time.sleep(wait)
-                label = _fetch_revgeo_label(lat, lon)
+                try:
-                _revgeo_last = time.monotonic()
+                    results = _fetch_geocode_forward(name, count)
-                _REVGEO_CACHE[key] = label
+                finally:
-                store.put_revgeo(key, label)   # survive restarts (a None label retries after its TTL)
+                    _revgeo_last = time.monotonic()
-            if not fut.done():
+                if not fut.done():
-                fut.set_result(label)
+                    fut.set_result(results)
         except Exception:  # noqa: BLE001 - never let a bad request kill the worker
             if not fut.done():
-                fut.set_result(None)
+                fut.set_result(None if kind == "revgeo" else [])
         finally:
             _REVGEO_QUEUE.task_done()
 
@@ -1105,44 +1147,28 @@ def reverse_geocode(lat: float, lon: float) -> str | None:
         return label
     _start_revgeo_worker()
     fut: "concurrent.futures.Future[str | None]" = concurrent.futures.Future()
-    _REVGEO_QUEUE.put((lat, lon, key, fut))
+    _REVGEO_QUEUE.put(("revgeo", lat, lon, key, fut))
     try:
         return fut.result(timeout=_REVGEO_WAIT_TIMEOUT)
     except concurrent.futures.TimeoutError:
         return None
 
 
-def geocode_nominatim(name: str, count: int = 5) -> list[dict]:
+def _fetch_geocode_forward(name: str, count: int) -> list[dict]:
-    """Forward place-name lookup via OpenStreetMap Nominatim (keyless).
+    """The actual Nominatim forward-search HTTP call + result shaping. Called
-
+    ONLY from _revgeo_worker (never on a caller's thread), mirroring
-    Replaces the former Open-Meteo geocoder. Nominatim covers the long tail the
+    _fetch_revgeo_label — but unlike that function, a bad response is allowed to
-    local GeoNames index can't — neighbourhoods, postcodes, sub-1000-population
+    raise here; _revgeo_worker's own except clause turns it into an empty list,
-    villages, and alternate/native-language spellings — so /geocode falls back to
+    same net effect without a second layer of exception-swallowing."""
-    it on a local miss. It carries no population, so results keep Nominatim's own
+    r = _request(
-    relevance order; name/admin/country map straight across.
+        "https://nominatim.openstreetmap.org/search",
-
+        {"q": name, "format": "jsonv2", "addressdetails": 1,
-    Shares the reverse geocoder's lock and ~1/sec pacing: both hit the same host,
+         "limit": count, "accept-language": "en"},
-    so serializing them together keeps total Nominatim traffic under the usage
+        30,
-    policy. Only the low-volume /geocode miss path reaches here — autocomplete
+        phase="geocode",
-    (/suggest) is served purely from the local index and never calls out.
+        headers={"User-Agent": "Thermograph/0.1 (local weather grading app)"},
-    """
+    )
-    global _revgeo_last
+    rows = r.json() or []
-    with _REVGEO_LOCK:
-        wait = _REVGEO_MIN_INTERVAL - (time.monotonic() - _revgeo_last)
-        if wait > 0:
-            time.sleep(wait)
-        try:
-            r = _request(
-                "https://nominatim.openstreetmap.org/search",
-                {"q": name, "format": "jsonv2", "addressdetails": 1,
-                 "limit": count, "accept-language": "en"},
-                30,
-                phase="geocode",
-                headers={"User-Agent": "Thermograph/0.1 (local weather grading app)"},
-            )
-            rows = r.json() or []
-        finally:
-            _revgeo_last = time.monotonic()
     out = []
     for g in rows:
         a = g.get("address", {}) or {}
@@ -1163,3 +1189,28 @@ def geocode_nominatim(name: str, count: int = 5) -> list[dict]:
             "population": None,   # Nominatim has no population; order is relevance-based
         })
     return out
+
+
+def geocode_nominatim(name: str, count: int = 5) -> list[dict]:
+    """Forward place-name lookup via OpenStreetMap Nominatim (keyless).
+
+    Replaces the former Open-Meteo geocoder. Nominatim covers the long tail the
+    local GeoNames index can't — neighbourhoods, postcodes, sub-1000-population
+    villages, and alternate/native-language spellings — so /geocode falls back to
+    it on a local miss. It carries no population, so results keep Nominatim's own
+    relevance order; name/admin/country map straight across.
+
+    Shares the reverse geocoder's worker thread and ~1/sec pacing: both hit the
+    same host, and both jobs are drained serially by the one thread in
+    _revgeo_worker, so there is exactly one writer of _revgeo_last — no lock
+    needed, same reasoning as reverse_geocode. Only the low-volume /geocode miss
+    path reaches here — autocomplete (/suggest) is served purely from the local
+    index and never calls out.
+    """
+    _start_revgeo_worker()
+    fut: "concurrent.futures.Future[list[dict]]" = concurrent.futures.Future()
+    _REVGEO_QUEUE.put(("geocode", name, count, fut))
+    try:
+        return fut.result(timeout=_GEOCODE_WAIT_TIMEOUT) or []
+    except concurrent.futures.TimeoutError:
+        return []

backend/data/climate_store.py

@@ -188,6 +188,29 @@ def recent_synced_at(cell_id: str) -> float:
         return 0.0
 
 
+def history_max_date(cell_id: str) -> "str | None":
+    """The ISO date (YYYY-MM-DD) of the cell's newest archived day, or None when
+    there is no cached history (or Postgres is off/unreachable).
+
+    Backs the content-page cache token (api/payloads.content_token), so it must be
+    CHEAP — an indexed ``MAX(date)`` over the ``(cell_id, date)`` primary key (see
+    the 0002 migration), never a full-history load. Fail-soft: any error reads as
+    None, so the caller falls back to a 'none' bucket rather than raising."""
+    try:
+        with _conn() as conn:
+            if conn is None:
+                return None
+            row = conn.execute(
+                "SELECT MAX(date) FROM climate_history WHERE cell_id = %s",
+                (cell_id,),
+            ).fetchone()
+            if not row or row[0] is None:
+                return None
+            return row[0].isoformat()
+    except Exception:  # noqa: BLE001
+        return None
+
+
 def cols_version(cell_id: str) -> int:
     """The stored schema version for a cell's history; 0 if absent."""
     try:

backend/deploy/entrypoint.sh

@@ -85,4 +85,7 @@ if [ "${RUN_MIGRATIONS:-1}" != "0" ]; then
 fi
 
 echo "==> Starting uvicorn on 0.0.0.0:${PORT:-8137} with ${WORKERS:-4} worker(s)"
-exec uvicorn app:app --host 0.0.0.0 --port "${PORT:-8137}" --workers "${WORKERS:-4}"
+# --no-access-log: the app's own request-logging middleware (audit.log_access,
+# web/app.py) already writes a structured line per request; uvicorn's own access
+# log just duplicated every one of them for no benefit.
+exec uvicorn app:app --host 0.0.0.0 --port "${PORT:-8137}" --workers "${WORKERS:-4}" --no-access-log

backend/notifications/notify.py

@@ -450,6 +450,37 @@ def _maybe_refresh_homepage() -> None:
         pass
 
 
+# Pre-warming the SEO content derived-store rides this loop too, for the same
+# reason the homepage sweep does: it's leader-only (the loop runs on the single
+# elected leader) and cache-only, so it spends no upstream quota. The content
+# token turns over when a cell's archive gains a day (~1x/day), so after each
+# advance the first request to a /climate page would otherwise recompute a
+# 45-year payload cold; warming rebuilds those rows off-request. It's paced and
+# capped per tick (CONTENT_WARM_MAX_CITIES) so one tick can't stall the notifier,
+# and the idempotent skip means a tick after everything is fresh is a cheap
+# no-op — the ~1000-city set refreshes across a handful of ticks, well inside the
+# <=1-day staleness the content token already tolerates.
+CONTENT_WARM_INTERVAL = float(os.environ.get("THERMOGRAPH_CONTENT_WARM_INTERVAL", "1800"))  # 30 min
+CONTENT_WARM_MAX_CITIES = int(os.environ.get("THERMOGRAPH_CONTENT_WARM_MAX_CITIES", "50"))
+_last_content_warm = 0.0
+
+
+def _maybe_warm_content() -> None:
+    global _last_content_warm
+    now = time.time()
+    if now - _last_content_warm < CONTENT_WARM_INTERVAL:
+        return
+    _last_content_warm = now
+    try:
+        # Local import: warm_cities is a script-style top-level module (mirrors
+        # api/internal_routes.py's warm-cities job), so only the leader pays its
+        # import cost, and it's kept off notify.py's import graph.
+        import warm_cities
+        warm_cities.warm_content(limit=CONTENT_WARM_MAX_CITIES)
+    except Exception:  # noqa: BLE001 - warming is best-effort; pages self-heal on request
+        pass
+
+
 # The daily "most unusual right now" post to Discord rides this loop too: once per
 # day, after the feed is refreshed, leader-only like everything in run_loop. No
 # webhook configured => no-op.
@@ -489,6 +520,7 @@ def run_loop():
         try:
             run_pass()
             _maybe_refresh_homepage()
+            _maybe_warm_content()
             _maybe_post_discord()
         except Exception:  # noqa: BLE001 - a bad iteration must never kill the loop
             pass

backend/tests/api/test_content_routes.py

@@ -0,0 +1,130 @@
+"""Route tests for the SSR content JSON API (api/content_routes.py).
+
+The point of these is the latency fix: a derived-store cache HIT must be O(1) —
+it must NOT load the ~45-year archive. So the weather layer is faked with call
+counters, and the core assertion is that a second identical request loads the
+history zero more times than the first. ETag/304 revalidation and the 404/payload
+shapes are covered alongside, against a fresh per-test store.
+"""
+import pytest
+from fastapi.testclient import TestClient
+
+from web import app as appmod
+from data import climate
+from data import cities
+
+BASE = "/thermograph/api/v2/content"
+
+CITY = {
+    "slug": "testville",
+    "name": "Testville",
+    "admin1": "Washington",
+    "country": "United States",
+    "country_code": "US",
+    "lat": 47.6062,
+    "lon": -122.3321,
+    "population": 100000,
+}
+
+
+@pytest.fixture
+def counts():
+    return {"load_cached_history": 0, "get_history": 0}
+
+
+@pytest.fixture
+def client(monkeypatch, history, recent, counts, tmp_store):
+    """TestClient with the weather + city layer faked and the history loaders
+    wrapped in counters. tmp_store gives each test a fresh derived store so the
+    miss->hit sequence is deterministic."""
+    def load_cached_history(cell):
+        counts["load_cached_history"] += 1
+        return history.clone()
+
+    def get_history(cell):
+        counts["get_history"] += 1
+        return history.clone(), {"cached": True, "cache_age_days": 3}
+
+    monkeypatch.setattr(climate, "load_cached_history", load_cached_history)
+    monkeypatch.setattr(climate, "get_history", get_history)
+    monkeypatch.setattr(climate, "get_recent_forecast", lambda cell: recent.clone())
+    # Stable token: content_token() -> payloads -> climate.history_max_date.
+    monkeypatch.setattr(climate, "history_max_date", lambda cell_id: "2026-07-01")
+    monkeypatch.setattr(climate, "reverse_geocode", lambda lat, lon: "Testville, Washington")
+    # Only "testville" is a known city; anything else -> 404.
+    monkeypatch.setattr(cities, "get", lambda slug: CITY if slug == "testville" else None)
+    return TestClient(appmod.app)
+
+
+# --- the regression guard: a cache hit loads no history ----------------------
+
+def test_cache_hit_does_not_load_history(client, counts):
+    """First request misses -> builds -> loads history exactly once. A second
+    identical request is served from the derived store and loads history ZERO
+    more times. This is the whole point of the fix."""
+    r1 = client.get(f"{BASE}/city/testville")
+    assert r1.status_code == 200
+    assert counts["load_cached_history"] == 1
+    assert counts["get_history"] == 0  # cached load was non-empty, no live fetch
+
+    r2 = client.get(f"{BASE}/city/testville")
+    assert r2.status_code == 200
+    assert r2.content == r1.content            # replayed from the store
+    assert counts["load_cached_history"] == 1  # unchanged: no history load on the hit
+    assert counts["get_history"] == 0
+
+
+def test_304_revalidation_loads_no_history(client, counts):
+    """If-None-Match on a stored payload -> 304 with no history load."""
+    r1 = client.get(f"{BASE}/city/testville")
+    assert r1.status_code == 200
+    etag = r1.headers["etag"]
+    before = counts["load_cached_history"]
+
+    r304 = client.get(f"{BASE}/city/testville", headers={"If-None-Match": etag})
+    assert r304.status_code == 304
+    assert r304.headers["etag"] == etag
+    assert counts["load_cached_history"] == before  # 304 loaded nothing
+
+
+def test_month_and_records_hits_skip_history_load(client, counts):
+    """Same O(1)-hit guarantee for the month and records handlers."""
+    for path in ("month/july", "records"):
+        counts["load_cached_history"] = 0
+        assert client.get(f"{BASE}/city/testville/{path}").status_code == 200
+        assert counts["load_cached_history"] == 1
+        assert client.get(f"{BASE}/city/testville/{path}").status_code == 200
+        assert counts["load_cached_history"] == 1  # second call is a store hit
+
+
+# --- payload shapes ----------------------------------------------------------
+
+def test_city_payload_shape(client):
+    body = client.get(f"{BASE}/city/testville").json()
+    assert body["city"]["slug"] == "testville"
+    assert body["canonical_path"] == "/climate/testville"
+    assert len(body["months"]) == 12
+    assert body["today_vs_normal"] is not None  # recent forecast folded in
+
+
+def test_month_payload_shape(client):
+    body = client.get(f"{BASE}/city/testville/month/july").json()
+    assert body["month_slug"] == "july"
+    assert body["canonical_path"] == "/climate/testville/july"
+
+
+def test_records_payload_shape(client):
+    body = client.get(f"{BASE}/city/testville/records").json()
+    assert body["canonical_path"] == "/climate/testville/records"
+
+
+# --- 404s --------------------------------------------------------------------
+
+def test_unknown_slug_is_404(client, counts):
+    for path in ("city/nope", "city/nope/month/july", "city/nope/records"):
+        assert client.get(f"{BASE}/{path}").status_code == 404
+    assert counts["load_cached_history"] == 0  # never reached the archive
+
+
+def test_unknown_month_is_404(client):
+    assert client.get(f"{BASE}/city/testville/month/smarch").status_code == 404

backend/tests/api/test_payloads.py

@@ -39,6 +39,34 @@ def test_cache_identity_formats_are_pinned(history):
     assert payloads.history_token(history) == f"{payloads.PAYLOAD_VER}:{payloads.hist_end(history)}"
 
 
+def test_content_token_is_stable_across_tail_topups(monkeypatch):
+    """The content token keys on the archive's newest DATE, not its row count/mtime,
+    so hourly tail top-ups that don't change the max date leave it unchanged — while
+    a genuinely-advanced last day turns it over."""
+    date_box = {"v": "2026-06-15"}
+    monkeypatch.setattr(climate, "history_max_date", lambda cid: date_box["v"])
+    first = payloads.content_token("1_2")
+    assert first == f"{payloads.PAYLOAD_VER}:{payloads.CONTENT_VER}:2026-06-15"
+    # Simulated hourly top-ups: same max date -> identical token every time.
+    assert payloads.content_token("1_2") == first
+    assert payloads.content_token("1_2") == first
+    # The archive's last day advances -> the token turns over.
+    date_box["v"] = "2026-06-16"
+    assert payloads.content_token("1_2") != first
+    assert payloads.content_token("1_2") == f"{payloads.PAYLOAD_VER}:{payloads.CONTENT_VER}:2026-06-16"
+
+
+def test_content_token_fail_soft_buckets_to_none(monkeypatch):
+    """A store/DB error (or an uncached cell) never raises — it buckets to 'none'."""
+    monkeypatch.setattr(climate, "history_max_date", lambda cid: None)
+    assert payloads.content_token("1_2") == f"{payloads.PAYLOAD_VER}:{payloads.CONTENT_VER}:none"
+
+    def boom(cid):
+        raise RuntimeError("store down")
+    monkeypatch.setattr(climate, "history_max_date", boom)
+    assert payloads.content_token("1_2") == f"{payloads.PAYLOAD_VER}:{payloads.CONTENT_VER}:none"
+
+
 def test_recent_token_composes_history_and_stamp(history, monkeypatch):
     monkeypatch.setattr(climate, "recent_stamp", lambda cid: "stamp")
     assert payloads.recent_token(history, "1_2") == f"{payloads.history_token(history)}:stamp"

backend/tests/core/test_metrics.py

@@ -40,6 +40,16 @@ def test_classify_inbound_categories():
     # dashboard probing /thermograph/... against a root-served (base="") prod app.
     assert c("/thermograph/api/v2/metrics", "") == "metrics"
     assert c("/api/v2/metrics", "") == "metrics"
+    # The SSR content API (backend/api/content_routes.py) is a server-to-server
+    # hop from frontend_ssr's own api_client.py, never a browser -- its own
+    # category is what lets it be excluded from the access log without also
+    # hiding real external traffic under the generic "api:*" bucket.
+    assert c("/thermograph/api/v2/content/hub", "/thermograph") == "internal"
+    assert c("/api/v2/content/city/tokyo", "") == "internal"
+    # The liveness probe: never under BASE, whatever base the app happens to be
+    # mounted at (it's registered at a fixed path -- see web/app.py's healthz).
+    assert c("/healthz") == "health"
+    assert c("/healthz", "/thermograph") == "health"
     # pages, static, seo
     assert c("/thermograph/", "/thermograph") == "page"
     assert c("/thermograph/calendar", "/thermograph") == "page"

backend/tests/data/test_climate.py

@@ -615,3 +615,104 @@ def test_reverse_geocode_timeout_returns_none_without_blocking_the_caller(monkey
     elapsed = time_mod.monotonic() - t0
     assert label is None
     assert elapsed < 0.2   # returned near the wait timeout, not after the 0.3s fetch
+
+
+# --- forward geocode: shares the reverse-geocode worker, not a second lock -----
+# Regression coverage for the NameError _REVGEO_LOCK bug (geocode_nominatim
+# referenced a lock that was removed when reverse geocoding moved to the
+# worker/queue design, so every forward lookup 502'd in production). These
+# exercise the real queue/worker plumbing rather than mocking geocode_nominatim
+# itself away, so a reintroduced bare `with _REVGEO_LOCK:` or any other
+# not-actually-defined-name bug fails loudly here instead of shipping unseen.
+
+def test_geocode_nominatim_resolves_via_the_worker_thread(monkeypatch):
+    monkeypatch.setattr(
+        climate, "_fetch_geocode_forward",
+        lambda name, count: [{"name": name, "admin1": None, "country": "Testland",
+                               "country_code": "TL", "lat": 1.0, "lon": 2.0,
+                               "population": None}],
+    )
+    results = climate.geocode_nominatim("Nowheresville")
+    assert results[0]["name"] == "Nowheresville"
+    assert results[0]["country"] == "Testland"
+
+
+def test_geocode_nominatim_timeout_returns_empty_list(monkeypatch):
+    """Same shape as reverse_geocode's timeout test: a caller waits only up to
+    _GEOCODE_WAIT_TIMEOUT, not as long as the fetch itself takes."""
+    import time as time_mod
+    monkeypatch.setattr(climate, "_GEOCODE_WAIT_TIMEOUT", 0.05)
+
+    def slow_fetch(name, count):
+        time_mod.sleep(0.3)
+        return [{"name": "Too Slow"}]
+
+    monkeypatch.setattr(climate, "_fetch_geocode_forward", slow_fetch)
+    t0 = time_mod.monotonic()
+    results = climate.geocode_nominatim("anywhere")
+    elapsed = time_mod.monotonic() - t0
+    assert results == []
+    assert elapsed < 0.2
+
+
+def test_geocode_nominatim_a_bad_fetch_degrades_to_empty_list_not_a_crash(monkeypatch):
+    """_fetch_geocode_forward is allowed to raise (matches _fetch_revgeo_label's
+    contract loosely -- the worker's except clause is the actual safety net);
+    confirm a raising fetch never reaches the caller as an exception."""
+    def boom(name, count):
+        raise RuntimeError("Nominatim is down")
+    monkeypatch.setattr(climate, "_fetch_geocode_forward", boom)
+    assert climate.geocode_nominatim("anywhere") == []
+
+
+def test_geocode_nominatim_shares_the_reverse_geocode_pacer(monkeypatch):
+    """Forward and reverse jobs are drained by the SAME worker thread off the
+    SAME queue, so a forward call advances _revgeo_last exactly like a reverse
+    one does -- this is what makes a second lock unnecessary."""
+    monkeypatch.setattr(climate, "_revgeo_last", 0.0)
+    monkeypatch.setattr(climate, "_fetch_geocode_forward", lambda name, count: [])
+    before = climate._revgeo_last
+    climate.geocode_nominatim("anywhere")
+    assert climate._revgeo_last > before
+
+
+def test_fetch_geocode_forward_parses_nominatim_response(monkeypatch):
+    """Executes _fetch_geocode_forward's real body (the function the NameError
+    bug prevented from ever running) against a stubbed HTTP transport -- not a
+    monkeypatch of geocode_nominatim itself, unlike the API-layer tests."""
+    class _FakeResp:
+        def json(self):
+            return [
+                {"name": "West Seattle", "lat": "47.57", "lon": "-122.38",
+                 "display_name": "West Seattle, Seattle, King County, Washington, United States",
+                 "address": {"suburb": "West Seattle", "city": "Seattle",
+                             "state": "Washington", "country": "United States",
+                             "country_code": "us"}},
+                # No `name`, no recognized address component -- falls back to the
+                # head of display_name, exercising that branch too.
+                {"lat": "51.5", "lon": "-0.1",
+                 "display_name": "Some Unnamed Place, Greater London, England",
+                 "address": {"country": "United Kingdom", "country_code": "gb"}},
+            ]
+
+    captured = {}
+
+    def fake_request(url, params, timeout, *, phase, headers=None, attempts=climate.MAX_ATTEMPTS):
+        captured["url"] = url
+        captured["params"] = params
+        captured["phase"] = phase
+        return _FakeResp()
+
+    monkeypatch.setattr(climate, "_request", fake_request)
+    results = climate._fetch_geocode_forward("west seattle", 5)
+
+    assert captured["url"] == "https://nominatim.openstreetmap.org/search"
+    assert captured["params"]["q"] == "west seattle"
+    assert captured["phase"] == "geocode"
+
+    assert results[0] == {
+        "name": "West Seattle", "admin1": "Washington", "country": "United States",
+        "country_code": "US", "lat": 47.57, "lon": -122.38, "population": None,
+    }
+    assert results[1]["name"] == "Some Unnamed Place"
+    assert results[1]["country_code"] == "GB"

backend/tests/data/test_climate_store.py

@@ -69,6 +69,17 @@ def test_recent_backend_roundtrips_through_parquet(monkeypatch, tmp_path):
     assert hit is not None and hit[0].height == 3
 
 
+def test_history_max_date_reads_parquet_tail_without_full_load(monkeypatch, tmp_path):
+    monkeypatch.setattr(climate, "CACHE_DIR", str(tmp_path))
+    cell_id = "9_10"
+    assert climate.history_max_date(cell_id) is None            # nothing cached -> None
+    climate._write_history_backed(cell_id, _hist_frame(n=5))     # dates 1995-01-01..05
+    assert climate.history_max_date(cell_id) == "1995-01-05"
+    # A tail top-up that appends a newer day advances the max date.
+    climate._write_history_backed(cell_id, _hist_frame(n=7))
+    assert climate.history_max_date(cell_id) == "1995-01-07"
+
+
 # --- gated Postgres integration ---------------------------------------------
 
 @pytest.fixture
@@ -140,6 +151,15 @@ def test_pg_recent_stamp_advances_only_on_write(pg_store):
     assert pg_store.history_synced_at("1_2") == 6000.0
 
 
+def test_pg_history_max_date(pg_store):
+    assert pg_store.history_max_date("1_2") is None            # no rows -> None
+    pg_store.write_history("1_2", _hist_frame(n=5), 1000.0)    # dates 1995-01-01..05
+    assert pg_store.history_max_date("1_2") == "1995-01-05"
+    # Another cell's rows must not leak into this cell's max.
+    pg_store.write_history("3_4", _hist_frame(n=9), 1000.0)
+    assert pg_store.history_max_date("1_2") == "1995-01-05"
+
+
 def test_pg_cols_version_gate(pg_store):
     pg_store.write_history("1_2", _hist_frame(n=2), 1000.0)
     assert pg_store.read_history("1_2") is not None

backend/tests/test_warm_content.py

@@ -0,0 +1,131 @@
+"""warm_cities.warm_content -- the off-request pre-warm that rebuilds the SEO
+content derived-store (api/content_routes.py's content-city / content-month /
+content-records rows) so the first request after each daily archive advance hits
+a warm cache instead of a cold 45-year recompute.
+
+The invariants under test mirror the ones content_routes.py relies on:
+  * it populates all three kinds under the exact (kind, key, token) the routes use;
+  * a city with no cached archive is skipped and never triggers an upstream fetch
+    (warming must not spend quota);
+  * it is idempotent -- a second run with nothing changed writes zero payloads.
+"""
+import warm_cities
+from api import content_payloads
+from api import payloads as cache_ids
+from data import cities as cities_mod
+from data import climate
+from data import grid
+from data import store
+
+
+# A fixed archive last-date -> a stable content token across a test's runs, so the
+# idempotency check exercises the "already fresh for this token" fast path.
+_MAX_DATE = "2026-07-20"
+
+
+def _two_cities():
+    """Two real curated cities (so the payload builders get the fields they read),
+    the first with a cached archive, the second without."""
+    everyone = cities_mod.all_cities()
+    return everyone[0], everyone[1]
+
+
+def _wire(monkeypatch, city_with_history, history):
+    """Point warm_content's cache-only reads at fixtures and make any upstream
+    fetch a hard failure, so a test proves warming never reaches the network."""
+    have_cell = grid.snap(city_with_history["lat"], city_with_history["lon"])["id"]
+
+    monkeypatch.setattr(climate, "history_max_date", lambda cell_id: _MAX_DATE)
+
+    def fake_cached_history(cell):
+        return history if cell["id"] == have_cell else None
+
+    monkeypatch.setattr(climate, "load_cached_history", fake_cached_history)
+    monkeypatch.setattr(climate, "load_cached_recent_forecast", lambda cell: None)
+
+    def _no_upstream(*a, **k):  # pragma: no cover - only fires on a regression
+        raise AssertionError("warm_content must not fetch upstream")
+
+    monkeypatch.setattr(climate, "get_history", _no_upstream)
+    monkeypatch.setattr(climate, "get_recent_forecast", _no_upstream)
+
+
+def test_warms_three_kinds_with_matching_key_and_token(tmp_store, monkeypatch, history):
+    warm, cold = _two_cities()
+    _wire(monkeypatch, warm, history)
+    monkeypatch.setattr(cities_mod, "all_cities", lambda: [warm, cold])
+
+    result = warm_cities.warm_content(origin="https://thermograph.org")
+
+    origin = "https://thermograph.org"
+    cell_id = grid.snap(warm["lat"], warm["lon"])["id"]
+    token = cache_ids.content_token(cell_id)
+    slug = warm["slug"]
+
+    # content-city + content-records under {slug}:{origin}, 12 months under {slug}:{month}
+    assert store.get_json("content-city", cell_id, f"{slug}:{origin}", token) is not None
+    assert store.get_json("content-records", cell_id, f"{slug}:{origin}", token) is not None
+    for month in content_payloads.MONTH_INDEX:
+        assert store.get_json("content-month", cell_id, f"{slug}:{month}", token) is not None
+
+    # 1 city + 1 records + 12 months = 14 payloads for the one city with history.
+    assert result["built"] == 14
+    assert result["warmed"] == 1
+
+
+def test_skips_city_without_cached_history_and_never_fetches(tmp_store, monkeypatch, history):
+    warm, cold = _two_cities()
+    _wire(monkeypatch, warm, history)
+    monkeypatch.setattr(cities_mod, "all_cities", lambda: [warm, cold])
+
+    result = warm_cities.warm_content(origin="https://thermograph.org")
+
+    # The archive-less city produced no rows (and _no_upstream never fired, or the
+    # call above would have raised).
+    cold_cell = grid.snap(cold["lat"], cold["lon"])["id"]
+    token = cache_ids.content_token(cold_cell)
+    assert store.get_json("content-city", cold_cell, f"{cold['slug']}:https://thermograph.org", token) is None
+    assert result["empty"] == 1
+
+
+def test_idempotent_second_run_writes_nothing(tmp_store, monkeypatch, history):
+    warm, cold = _two_cities()
+    _wire(monkeypatch, warm, history)
+    monkeypatch.setattr(cities_mod, "all_cities", lambda: [warm, cold])
+
+    # Spy on put_payload while still persisting, so run 2 sees run 1's rows.
+    calls = []
+    real_put = store.put_payload
+
+    def spy(kind, cell_id, key, token, payload, cache=True):
+        calls.append((kind, cell_id, key, token))
+        return real_put(kind, cell_id, key, token, payload, cache)
+
+    monkeypatch.setattr(store, "put_payload", spy)
+
+    first = warm_cities.warm_content(origin="https://thermograph.org")
+    assert len(calls) == 14           # one full city warmed
+    assert first["built"] == 14
+
+    calls.clear()
+    second = warm_cities.warm_content(origin="https://thermograph.org")
+    assert calls == []                # nothing rebuilt: every kind still fresh
+    assert second["built"] == 0
+    assert second["warmed"] == 0
+    assert second["skipped"] == 1     # the warm city skipped cheaply
+    assert second["empty"] == 1       # the archive-less city still empty
+
+
+def test_limit_caps_cities_built_per_call(tmp_store, monkeypatch, history):
+    # Two cities, both with a cached archive; limit=1 should build exactly one.
+    a, b = _two_cities()
+    have = {grid.snap(a["lat"], a["lon"])["id"], grid.snap(b["lat"], b["lon"])["id"]}
+    monkeypatch.setattr(climate, "history_max_date", lambda cell_id: _MAX_DATE)
+    monkeypatch.setattr(climate, "load_cached_history",
+                        lambda cell: history if cell["id"] in have else None)
+    monkeypatch.setattr(climate, "load_cached_recent_forecast", lambda cell: None)
+    monkeypatch.setattr(cities_mod, "all_cities", lambda: [a, b])
+
+    result = warm_cities.warm_content(limit=1, origin="https://thermograph.org")
+    assert result["warmed"] == 1
+    assert result["built"] == 14

backend/tests/web/test_request_logging.py

@@ -0,0 +1,87 @@
+"""The request-logging middleware (web/app.py's revalidate_static): what gets
+counted, what gets written to the access log, and what gets truncated before
+it's persisted. Companion to core/test_metrics.py's classify_inbound tests --
+these exercise the actual ASGI request path, not just the classifier function.
+"""
+import pytest
+from fastapi.testclient import TestClient
+
+from web import app as appmod
+
+metrics = appmod.metrics   # the exact module object app.py's own calls use --
+audit = appmod.audit       # see the note on module-reload isolation below.
+
+
+@pytest.fixture
+def client():
+    return TestClient(appmod.app)
+
+
+def _patch_log_access(monkeypatch):
+    calls = []
+    monkeypatch.setattr(audit, "log_access", lambda record: calls.append(record))
+    return calls
+
+
+def test_healthz_is_never_audited(monkeypatch, client):
+    """/healthz is ~47% of prod's daily access log; it must never even reach
+    audit.log_access (not just be cheap once there -- see classify_inbound's
+    "health" category and the exclusion in revalidate_static)."""
+    calls = _patch_log_access(monkeypatch)
+    r = client.get("/healthz")
+    assert r.status_code == 200
+    assert calls == []
+
+
+def test_internal_category_is_never_audited(monkeypatch, client):
+    """The SSR content API's own category ("internal") is excluded from the
+    access log the same way -- it's a server-to-server hop (frontend_ssr's
+    api_client.py calling backend), not a page view."""
+    calls = _patch_log_access(monkeypatch)
+    monkeypatch.setattr(metrics, "classify_inbound", lambda path, base: "internal")
+    r = client.get("/thermograph/api/version")
+    assert r.status_code == 200
+    assert calls == []
+
+
+def test_access_log_ip_is_truncated_not_raw(monkeypatch, client):
+    calls = _patch_log_access(monkeypatch)
+    r = client.get("/thermograph/api/version",
+                    headers={"X-Forwarded-For": "203.0.113.77, 10.0.0.1"})
+    assert r.status_code == 200
+    assert len(calls) == 1
+    assert calls[0]["ip"] == "203.0.113.0"      # /24, not the exact address
+    assert calls[0]["ip"] != "203.0.113.77"
+
+
+def test_loggable_ip_truncation():
+    assert appmod._loggable_ip("203.0.113.77") == "203.0.113.0"
+    assert appmod._loggable_ip("2001:db8:1234:5678::1") == "2001:db8:1234::"
+    assert appmod._loggable_ip(None) is None
+    assert appmod._loggable_ip("") == ""
+    assert appmod._loggable_ip("not-an-ip") == "not-an-ip"   # best-effort, never raises
+
+
+def test_rate_limiter_still_sees_the_full_precision_ip(monkeypatch, client):
+    """_client_ip (which feeds both the access log and the event rate limiter)
+    is never itself truncated -- only what audit.log_access persists is. A
+    /24-truncated rate-limit key would let one abuser exhaust a whole NAT'd
+    office's quota, which is exactly what must NOT happen here."""
+    seen = {}
+    monkeypatch.setattr(metrics, "record_event", lambda name, **kw: seen.update(kw))
+    r = client.post("/thermograph/api/v2/event", json={"event": "home.locate"},
+                    headers={"X-Forwarded-For": "203.0.113.77"})
+    assert r.status_code == 204
+    assert seen["ip"] == "203.0.113.77"
+
+
+def test_event_route_records_end_to_end(client):
+    """Full HTTP round trip through the real ASGI route -- confirms the write
+    path backend/api/event -> metrics.record_event -> the counters store works
+    end to end (the existing suite only ever called record_event directly)."""
+    before = metrics.snapshot()["events_total"]
+    r = client.post("/thermograph/api/v2/event", json={"event": "home.locate"})
+    assert r.status_code == 204
+    after = metrics.snapshot()
+    assert after["events_total"] == before + 1
+    assert after["events"]["home.locate"]["direct"]   # no Referer sent -> "direct"

backend/warm_cities.py

@@ -19,13 +19,21 @@ import os
 import sys
 import time
 
+from api import content_payloads
 from api import homepage
+from api import payloads as cache_ids
 from core import singleton
 from data import cities
 from data import climate
 from data import grid
+from data import store
 import paths
 
+# The deployment base path, derived exactly as api/content_routes.py does so the
+# breadcrumb hrefs / jsonld URLs the warmer bakes match what a live request bakes.
+_BASE = os.environ.get("THERMOGRAPH_BASE", "/thermograph").strip("/")
+BASE = f"/{_BASE}" if _BASE else ""
+
 # core/singleton.py's flock guard, reused here for cross-*process* (not
 # cross-worker) exclusion: the first invocation holds this for its process
 # lifetime; a second one (an overlapping deploy) fails the non-blocking flock
@@ -67,6 +75,100 @@ def main(limit: int | None = None, pace: float = 2.0) -> None:
         print(f"homepage feed: FAILED {e}")
 
 
+# --- content derived-store pre-warm -------------------------------------------
+# The SEO /climate/<city>[/month|/records] pages render their JSON from the
+# derived store (api/content_routes.py), keyed by the cheap+stable content token
+# (payloads.content_token -> PAYLOAD_VER:CONTENT_VER:archive_last_date). That token
+# turns over only when a cell's archive gains a new day (~1x/day), so on the first
+# request after each daily advance the page would otherwise recompute a 45-year
+# payload cold. Pre-warming rebuilds those rows off-request — cache-only, so it
+# never spends upstream quota — so users and crawlers land on a warm cache.
+
+
+def _content_specs(slug: str, origin: str) -> "list[tuple[str, str, str, int | None]]":
+    """The (store-kind, store-key, builder-tag, month_idx) tuples for one city,
+    matching api/content_routes.py's kinds/keys exactly: content-city and
+    content-records key on ``{slug}:{origin}`` (the origin is folded in because the
+    payloads' jsonld.url is origin-qualified), content-month keys on
+    ``{slug}:{month}`` for each of the 12 months."""
+    specs = [
+        ("content-city", f"{slug}:{origin}", "city", None),
+        ("content-records", f"{slug}:{origin}", "records", None),
+    ]
+    for month, idx in content_payloads.MONTH_INDEX.items():
+        specs.append(("content-month", f"{slug}:{month}", "month", idx))
+    return specs
+
+
+def _build_content(tag: str, city: dict, history, recent, origin: str, month_idx: "int | None") -> dict:
+    if tag == "city":
+        return content_payloads.city_payload(origin, BASE, city, history, recent)
+    if tag == "records":
+        return content_payloads.records_payload(origin, BASE, city, history)
+    return content_payloads.month_payload(BASE, city, history, month_idx)
+
+
+def warm_content(limit: int | None = None, origin: str | None = None, pace: float = 0.05) -> dict:
+    """Rebuild any missing/stale content-page payloads in the derived store.
+
+    For each curated city, compute the current content token (cheap — no history
+    load) and check whether every content kind (city, 12 months, records) already
+    has a row for that token. Cities that are wholly fresh are skipped *without*
+    loading the archive, so a re-run after everything is warm is near-instant and
+    only cells whose archive genuinely advanced (new token) do work — the same
+    idempotent contract as ``main``.
+
+    Cache-only, exactly like ``main``: the history and recent/forecast bundles are
+    read from the cache; a cell with no cached archive is skipped rather than
+    fetched, so warming never spends a single upstream request.
+
+    ``limit`` caps the number of cities actually (re)built this call (not scanned),
+    so a caller can bound one pass's wall-clock and rely on the idempotent skip to
+    resume from where it left off on the next call. Returns a small counts dict.
+    """
+    if origin is None:
+        origin = os.environ.get("THERMOGRAPH_BASE_URL", "https://thermograph.org").rstrip("/")
+    built = warmed = skipped = empty = failed = 0
+    for c in cities.all_cities():
+        if limit is not None and warmed >= limit:
+            break
+        slug = c["slug"]
+        cell = grid.snap(c["lat"], c["lon"])
+        cell_id = cell["id"]
+        token = cache_ids.content_token(cell_id)
+        specs = _content_specs(slug, origin)
+        # Cheap idempotency gate: which kinds are missing/stale for this token?
+        # get_payload is a cheap keyed lookup; loading the 45-year archive is not,
+        # so we defer that until we know at least one kind actually needs building.
+        stale = [s for s in specs if store.get_payload(s[0], cell_id, s[1], token) is None]
+        if not stale:
+            skipped += 1
+            continue
+        history = climate.load_cached_history(cell)
+        if history is None or history.is_empty():
+            # No cached archive yet -> nothing to build from, and warming must not
+            # fetch upstream. The cell self-heals on its first live request.
+            empty += 1
+            continue
+        # today_vs_normal on the city payload needs the recent/forecast bundle;
+        # read it cache-only (never fetch) — None just drops that one block.
+        recent = climate.load_cached_recent_forecast(cell)
+        did_work = False
+        for kind, key, tag, month_idx in stale:
+            try:
+                payload = _build_content(tag, c, history, recent, origin, month_idx)
+                store.put_payload(kind, cell_id, key, token, payload)
+                built += 1
+                did_work = True
+            except Exception:  # noqa: BLE001 - one bad payload must not abort the sweep
+                failed += 1
+        if did_work:
+            warmed += 1
+            if pace:
+                time.sleep(pace)
+    return {"warmed": warmed, "built": built, "skipped": skipped, "empty": empty, "failed": failed}
+
+
 if __name__ == "__main__":
     if not singleton.claim(LOCK_PATH):
         # Not an error: an overlapping run just means a previous deploy's warm is

backend/web/app.py

@@ -3,6 +3,7 @@ import contextlib
 import datetime
 import hashlib
 import hmac
+import ipaddress
 import json
 import os
 import queue
@@ -263,13 +264,34 @@ def api_version():
 
 def _client_ip(request) -> "str | None":
     """The real client IP: the left-most X-Forwarded-For hop when a proxy fronts us
-    (Caddy on prod sets it), otherwise the direct peer address (LAN dev)."""
+    (Caddy on prod sets it), otherwise the direct peer address (LAN dev). Full
+    precision — the rate limiter (metrics._rate_ok) needs the exact address, since
+    a truncated key would let one abuser exhaust a whole NAT'd office's quota.
+    Truncate at the point of persistence instead (see _loggable_ip)."""
     xff = request.headers.get("x-forwarded-for")
     if xff:
         return xff.split(",")[0].strip()
     return request.client.host if request.client else None
 
 
+def _loggable_ip(ip: "str | None") -> "str | None":
+    """Coarsen a client IP before it's written to the access log: /24 for IPv4,
+    /48 for IPv6. Keeps rough geo/abuse signal without keeping a full, joinable
+    address sitting in structured logs for the log's 30-day retention -- the
+    public privacy page promises IPs aren't logged beyond normal request handling,
+    and a raw address shipped to Loki was a live gap against that. Never the
+    input to the rate limiter (_client_ip's callers pass the untruncated value
+    there) -- this is only what gets persisted."""
+    if not ip:
+        return ip
+    try:
+        addr = ipaddress.ip_address(ip)
+    except ValueError:
+        return ip  # not a parseable address (e.g. a test/placeholder value) -- pass through
+    prefix = 24 if addr.version == 4 else 48
+    return str(ipaddress.ip_network(f"{addr}/{prefix}", strict=False).network_address)
+
+
 @app.middleware("http")
 async def revalidate_static(request, call_next):
     """Serve the frontend with no-cache (NOT no-store): browsers may keep a copy
@@ -288,11 +310,15 @@ async def revalidate_static(request, call_next):
         # loop so one request's instrumentation can't stall every other request
         # this worker is serving concurrently.
         await run_in_threadpool(metrics.record_inbound, cat, response.status_code)
-        # Retain per-request client IPs for later analysis; skip static assets and the
+        # Retain per-request client IPs for later analysis; skip static assets, the
-        # dashboard's own metrics polling to keep the log to real, meaningful traffic.
+        # dashboard's own metrics polling, the liveness probe (health -- by far the
-        if cat not in ("static", "metrics", "event"):
+        # highest-volume single path, and never real traffic), and the internal
+        # SSR->API hop (internal -- frontend_ssr's own server-to-server calls, not
+        # a page view) to keep the log to real, meaningful traffic. The IP itself is
+        # truncated (see _loggable_ip) -- coarse geo/abuse signal, not a full address.
+        if cat not in ("static", "metrics", "event", "health", "internal"):
             await run_in_threadpool(audit.log_access, {
-                "ip": _client_ip(request), "method": request.method,
+                "ip": _loggable_ip(_client_ip(request)), "method": request.method,
                 "path": path, "status": response.status_code, "cat": cat})
         # Threshold-gated slow-request line: RunAudit only times the 7 graded
         # endpoints, so this is the only latency signal for auth/account/content

infra/ops/ICEBERG-HANDOFF.md

@@ -0,0 +1,133 @@
+# Iceberg: implementing the agent-queryable service
+
+Handoff spec for whoever builds the Iceberg layer. The Postgres equivalent is
+already shipped (`infra/ops/dbq.sh`) — **mirror it**. This document is the
+contract, the environment facts you'll trip over, and how the result gets
+verified.
+
+## Definition of done
+
+`infra/ops/iceberg.sh` exists and behaves like `dbq.sh`:
+
+```sh
+infra/ops/iceberg.sh prod -c "select count(*) from <namespace>.<table>"
+infra/ops/iceberg.sh dev  -c "show tables"
+echo "select 1" | infra/ops/iceberg.sh beta -f -
+```
+
+An agent (or operator) can query Iceberg in any environment, read-only, with no
+new network exposure and no interactive steps.
+
+## The contract (non-negotiable)
+
+1. **Same interface shape as `dbq.sh`** — `iceberg.sh <dev|beta|prod> [flags]
+   "<sql>"`. Extra flags pass through to the engine; **stdin is forwarded** so
+   `-f -` works. Non-interactive, deterministic, safe to call from CI.
+2. **Read-only enforced by the system, not by convention.** A dedicated
+   read-only identity — not an admin/superuser credential. You must be able to
+   *demonstrate* a refused write (see Acceptance).
+3. **No new network endpoints.** Run the engine where the data is already
+   reachable (containerised), rather than publishing ports or opening firewall
+   rules. See the prod constraint below — this is not negotiable, it's physics.
+4. **Env-keyed dispatch, names resolved at call time.** Prod is Docker Swarm;
+   task container names change on **every redeploy**. Resolve via
+   `docker ps --filter name=…`; never hardcode a container name.
+5. **No secrets in the repo** or in workflow files.
+
+## Environment facts you need
+
+- Monorepo `emi/thermograph` (domain dirs: `backend/ frontend/ infra/
+  observability/`). Ops tooling lives in `infra/ops/`.
+- Environments: **dev** = LAN compose stack on the dev machine; **beta** =
+  `75.119.132.91`; **prod** = `169.58.46.181`. SSH as `agent` with
+  `~/.ssh/thermograph_agent_ed25519` (passwordless sudo on both boxes).
+- **Prod runs Docker Swarm.** Its app database sits on the overlay network
+  `thermograph_internal` (`10.0.2.0/24`), which **the prod host itself cannot
+  route to**. Consequence, learned the hard way: `ssh -L` tunnelling works for
+  beta but is *impossible* for prod. Any design that depends on a tunnel or a
+  published port will fail on prod — that's why `dbq.sh` execs into the
+  container instead. Assume the same for anything you deploy there.
+- The overlay is `attachable=true`, and the **dev machine is a Swarm worker** in
+  the prod cluster (NodeAddr `10.10.0.3`) — so `docker run --network
+  thermograph_internal …` from the dev box is a plausible route to prod-side
+  services. Untested; verify before relying on it.
+- WireGuard mesh: prod `10.10.0.1`, beta `10.10.0.2`, dev `10.10.0.3`.
+- `rclone` and `age` are already installed on prod and beta.
+- Reference implementation to copy: **`infra/ops/dbq.sh`** + `infra/ops/README.md`.
+
+## Storage — almost certainly your warehouse
+
+Contabo Object Storage (S3-compatible), already provisioned and in use:
+
+- Endpoint `https://eu2.contabostorage.com` · bucket `era5-thermograph` ·
+  region `default` · ~2 TB · **private** (keep it that way).
+- ⚠️ **Contabo requires PATH-STYLE addressing.** Set
+  `force_path_style=true` / `s3.path-style-access=true` (whatever your engine's
+  FileIO calls it) and `region=default`. Virtual-host-style addressing **fails**.
+  This is validated, not theoretical.
+- ⚠️ **The `backups/` prefix is in use** by the nightly backup jobs (prod DB +
+  Forgejo). Put Iceberg data under its own prefix (e.g. `iceberg/` or
+  `warehouse/`). Do not write outside your prefix.
+- Credentials already exist — **reuse them, don't mint new ones silently**:
+  - SOPS vault: `infra/deploy/secrets/{prod,beta}.yaml` as `THERMOGRAPH_S3_*`
+    (rendered to `/etc/thermograph.env` at deploy by
+    `infra/deploy/render-secrets.sh`).
+  - Forgejo Actions secrets: `S3_ENDPOINT`, `S3_BUCKET`, `S3_ACCESS_KEY`,
+    `S3_SECRET_KEY`.
+  - If read-only S3 keys are needed for the query identity, ask the operator to
+    mint a scoped keypair rather than reusing the read-write one.
+
+## Secrets handling
+
+- Host-side: SOPS + age. Recipient `age1xx4dzs0dxlwvkv9sjuqzsphl7lfrxannkfken374yu2qvvcte9sqzktqt2`;
+  the private key is on each host at `/etc/thermograph/age.key` and on the
+  operator's machine at `~/.config/sops/age/keys.txt`.
+- CI-side: Forgejo Actions secrets.
+- ⚠️ **beta gotcha:** `/etc/thermograph.env` on beta is `agent:agent 0640` — the
+  `deploy` user **cannot read it**. If your service or job runs as `deploy` on
+  beta, pull credentials from Actions secrets instead, or change the ownership
+  deliberately and say so.
+
+## Decisions you must make — and report back
+
+1. **Catalog**: REST (Lakekeeper / Nessie / Polaris), JDBC-on-Postgres, Hive, or
+   filesystem/hadoop — and where it runs per environment.
+2. **Engine**: DuckDB + iceberg extension, Trino, Spark, or pyiceberg. Prefer the
+   lightest that satisfies the contract; it must run containerised and headless.
+3. **Warehouse location**: bucket + prefix, and whether environments are isolated
+   by separate prefixes, namespaces, or buckets.
+4. **Read-only mechanism**: scoped S3 keys? catalog RBAC? engine restricted mode?
+   State which, and how a write is refused.
+5. **Where the engine runs** for each env (local container on dev, on the box for
+   beta/prod, or attached to the overlay) — consistent with constraint #3.
+
+## Acceptance criteria
+
+The work is accepted when all of these are demonstrated with pasted output:
+
+- [ ] `infra/ops/iceberg.sh <env> -c "<select>"` returns rows for **each**
+      environment that has data (explicitly state any env that doesn't yet).
+- [ ] **A write/DDL attempt is refused by the system**, with the error pasted.
+      The Postgres bar to match:
+      `create table` on prod → `ERROR:  permission denied for schema public`.
+- [ ] **No new exposure**: `sudo ss -ltnp` on prod and beta shows no new
+      listening port; no new ufw rules; no Swarm `EndpointSpec` publish added.
+      State this explicitly.
+- [ ] Non-interactive: extra flags pass through, stdin (`-f -`) works.
+- [ ] Prod container/task resolution is dynamic (survives a redeploy).
+- [ ] `infra/ops/README.md` updated with an Iceberg section: usage examples and
+      the *why* (same style as the Postgres rationale).
+
+## Anti-goals
+
+- ❌ Publishing catalog/engine/DB ports publicly, or adding firewall holes.
+- ❌ Any design requiring a persistent SSH tunnel (**prod cannot be tunnelled**).
+- ❌ Querying with an admin/superuser/read-write credential.
+- ❌ Secrets committed to the repo or pasted into workflow files.
+- ❌ Writing outside your own S3 prefix (`backups/` is live and load-bearing).
+
+## Questions to route back to the operator
+
+Anything that would require: minting new cloud credentials, opening a port,
+changing firewall/Swarm configuration, or writing to a shared prefix. Don't
+improvise on those — ask.

infra/ops/README.md

@@ -0,0 +1,126 @@
+# ops/ — operator + agent query tooling
+
+Read-only query access to Thermograph data, uniform across environments.
+
+## `dbq.sh` — Postgres, any environment
+
+```sh
+infra/ops/dbq.sh dev  "select count(*) from climate_history"
+infra/ops/dbq.sh prod -tA -c "select max(date) from climate_history"
+infra/ops/dbq.sh beta -c '\dt'
+echo "select 1" | infra/ops/dbq.sh prod -f -
+```
+
+Environments: `dev` (LAN compose stack on the dev machine), `beta`
+(75.119.132.91), `prod` (169.58.46.181). Extra args pass straight through to
+`psql` (`-tA`, `-x`, `--csv`, `-f`, …); stdin is forwarded.
+
+### Why it execs into the container instead of using a connection string
+
+None of the databases are exposed over TCP — each listens only on its private
+docker network. Prod's is a Swarm **overlay** (`10.0.2.0/24`) that the host
+cannot route to, so `ssh -L` works for beta but is *impossible* for prod;
+publishing 5432 would mean new ufw rules plus a Swarm endpoint change on
+production. Running `psql` inside the db container works identically in all
+three environments with no ports, no tunnels, and no infra changes.
+
+The prod container name is a Swarm task name that changes on every redeploy, so
+it is resolved at call time via `docker ps --filter name=…`, never hardcoded.
+
+### Safety
+
+Queries connect as **`thermograph_ro`** — a `NOSUPERUSER` role granted only
+`pg_read_all_data`. Read-only is enforced by Postgres, not by convention:
+
+```
+$ infra/ops/dbq.sh prod -c "create table t(i int)"
+ERROR:  permission denied for schema public
+```
+
+The app's own `thermograph` role is a superuser and is deliberately **not** used
+by this tool. If the role is ever missing (fresh database), recreate it with:
+
+```sql
+CREATE ROLE thermograph_ro LOGIN;
+GRANT CONNECT ON DATABASE thermograph TO thermograph_ro;
+GRANT pg_read_all_data TO thermograph_ro;
+```
+
+## `iceberg.sh` — the Iceberg lake, any environment
+
+```sh
+infra/ops/iceberg.sh dev  -c "show tables"
+infra/ops/iceberg.sh prod -c "select count(*) from era5_daily"
+infra/ops/iceberg.sh beta -json -c "select * from era5_daily limit 3"
+echo "select 1" | infra/ops/iceberg.sh prod -f -
+```
+
+Same environments and argument shape as `dbq.sh` (spec:
+[`ICEBERG-HANDOFF.md`](./ICEBERG-HANDOFF.md)). Extra args pass straight
+through to the duckdb CLI (`-json`, `-csv`, `-line`, `-c`, `-f`, …); with
+`-f -`, stdin is forwarded and read as piped SQL; a single bare argument is
+treated as `-c` SQL.
+
+### Why an ephemeral DuckDB container instead of a query service
+
+The lake is **one shared warehouse** in Contabo object storage
+(`s3://era5-thermograph/iceberg`), reachable from every environment with the
+same credentials — so unlike Postgres there is no per-env database to reach,
+and the environments differ only in *where the engine runs*: a throwaway
+`docker run` of a small DuckDB image (duckdb CLI + `httpfs`/`iceberg`
+extensions pre-installed) on the target box — locally for LAN dev, over SSH
+for beta/prod. The image is built on the host the first time it's needed from
+a Dockerfile embedded in the script; its tag is a hash of that Dockerfile, so
+editing the script rolls every host forward on the next call.
+
+A container per query means no daemon, no listening port, no tunnel (prod's
+overlay cannot be tunnelled), no firewall or Swarm changes — `sudo ss -ltnp`
+is identical before and after a query. It also never execs into an app
+container and resolves no container names, so prod redeploys can't break it.
+
+There is no catalog service to run or expose: an Iceberg table's current
+state is fully described by the newest metadata JSON under
+`<warehouse>/<table>/metadata/`. `iceberg.sh` resolves that at call time
+(numeric metadata version, newest wins) and exposes each table directory as a
+view of the same name — which is also how it keeps reading fresh snapshots of
+a table that is still being loaded.
+
+Credentials are resolved at call time and never stored in the repo: the
+target host's `/etc/thermograph.env` (`THERMOGRAPH_LAKE_S3_*`) wins if
+present; otherwise the calling machine decrypts the SOPS vault
+(`infra/deploy/secrets/prod.yaml`) and hands the two values to the remote
+shell over stdin — never argv, so never visible in `ps`, and never written to
+a file on the target.
+
+### Safety
+
+Every session locks itself down *before* user SQL runs:
+
+```sql
+SET allowed_directories=['s3://era5-thermograph/iceberg/', 's3://era5-thermograph/era5/'];
+SET enable_external_access=false;
+SET lock_configuration=true;
+```
+
+Both prefixes are required for reads: `era5_daily` was built with pyiceberg
+`add_files` over the existing hive parquet, so its metadata lives under
+`iceberg/` while its data files stay in place under `era5/daily/`. DuckDB
+itself then refuses everything else — the live `backups/` prefix, all local
+files — and the lockdown cannot be SET away by query text:
+
+```
+$ infra/ops/iceberg.sh prod -c "COPY (SELECT 1) TO 's3://era5-thermograph/backups/x.csv'"
+Permission Error: Cannot access file "s3://era5-thermograph/backups/x.csv" - file system operations are disabled by configuration
+$ infra/ops/iceberg.sh dev -c "SET enable_external_access=true"
+Invalid Input Error: Cannot change configuration option "enable_external_access" - the configuration has been locked
+```
+
+**Known gap:** the only provisioned keypair for the bucket is read-write, so
+a raw `COPY TO` targeting a path *inside* the two allowed prefixes is not
+refused — the DuckDB iceberg extension cannot write Iceberg tables, but it
+could still clobber raw objects under `iceberg/` or `era5/`. Path-based
+restriction cannot both allow reading a prefix and forbid writing it; closing
+the gap needs a scoped read-only keypair (the object-storage equivalent of
+`thermograph_ro`). When the operator mints one, render it as
+`THERMOGRAPH_LAKE_S3_*` on the hosts or swap it into the vault —
+`iceberg.sh` needs no code change.

infra/ops/dbq.sh

@@ -0,0 +1,68 @@
+#!/usr/bin/env bash
+# dbq -- run READ-ONLY SQL against any Thermograph Postgres (LAN dev / beta / prod).
+#
+#   infra/ops/dbq.sh dev  "select count(*) from climate_history"
+#   infra/ops/dbq.sh prod -tA "select max(date) from climate_history"
+#   infra/ops/dbq.sh beta -c '\dt'
+#   echo "select 1" | infra/ops/dbq.sh prod -f -
+#
+# Why exec-into-the-container instead of a connection string:
+# none of the databases are exposed over TCP. Each listens only on its private
+# docker network -- and prod's is a Swarm *overlay* (10.0.2.0/24) that the host
+# itself cannot route to, so `ssh -L` works for beta but is impossible for prod.
+# Publishing 5432 would mean new firewall + Swarm endpoint changes on production.
+# Running psql *inside* the db container works identically in all three
+# environments with no ports, no tunnels and no infra changes -- locally for LAN
+# dev, over SSH for beta/prod.
+#
+# Safety: always connects as `thermograph_ro`, a NOSUPERUSER role granted only
+# pg_read_all_data. Read-only is enforced by Postgres itself, not by convention,
+# so a stray INSERT/DDL fails with "permission denied" even against prod. (The
+# app's own `thermograph` role is a superuser -- deliberately not used here.)
+#
+# Any extra arguments are passed straight through to psql, so -tA, -c, -f, -x,
+# --csv etc. all work. Stdin is forwarded, so `-f -` reads piped SQL.
+set -euo pipefail
+
+KEYFILE="${THERMOGRAPH_AGENT_KEY:-$HOME/.ssh/thermograph_agent_ed25519}"
+DB_USER="${THERMOGRAPH_DB_QUERY_USER:-thermograph_ro}"
+DB_NAME="${THERMOGRAPH_DB_NAME:-thermograph}"
+
+usage() {
+  sed -n '2,9p' "$0" | sed 's/^# \{0,1\}//' >&2
+  echo "environments: dev | beta | prod" >&2
+  exit 2
+}
+
+env_name="${1:-}"
+[ -n "$env_name" ] || usage
+shift
+
+case "$env_name" in
+  dev)  filter=thermograph-dev-db ; ssh_target= ;;
+  beta) filter=thermograph-db-1   ; ssh_target=agent@75.119.132.91 ;;
+  prod) filter=thermograph_db     ; ssh_target=agent@169.58.46.181 ;;
+  -h|--help) usage ;;
+  *) echo "dbq: unknown environment '$env_name' (want: dev|beta|prod)" >&2; exit 2 ;;
+esac
+
+[ $# -gt 0 ] || usage
+
+# Quote the psql arguments so they survive the remote shell intact.
+psql_args=$(printf '%q ' "$@")
+
+# The container name is resolved on the target host at call time: prod's Swarm
+# task name changes on every redeploy, so it can never be hardcoded.
+remote=$(cat <<REMOTE
+cid=\$(docker ps -qf name=${filter} | head -1)
+[ -n "\$cid" ] || { echo "dbq: no running db container matching '${filter}'" >&2; exit 1; }
+exec docker exec -i "\$cid" psql -U ${DB_USER} -d ${DB_NAME} -v ON_ERROR_STOP=1 ${psql_args}
+REMOTE
+)
+
+if [ -z "$ssh_target" ]; then
+  exec bash -c "$remote"
+else
+  exec ssh -i "$KEYFILE" -o StrictHostKeyChecking=no -o ConnectTimeout=15 \
+    "$ssh_target" "$remote"
+fi

infra/ops/iceberg.sh

@@ -0,0 +1,200 @@
+#!/usr/bin/env bash
+# iceberg -- run READ-ONLY SQL against the Thermograph Iceberg lake (LAN dev / beta / prod).
+#
+#   infra/ops/iceberg.sh dev  -c "show tables"
+#   infra/ops/iceberg.sh prod -c "select count(*) from era5_daily"
+#   infra/ops/iceberg.sh beta -json -c "select * from era5_daily limit 3"
+#   echo "select 1" | infra/ops/iceberg.sh prod -f -
+#
+# Why an ephemeral container instead of a query service: the lake is one shared
+# warehouse in Contabo object storage (s3://era5-thermograph/iceberg), readable
+# from every environment, so the environments differ only in WHERE the engine
+# runs -- a throwaway `docker run` of a small DuckDB image on the target box.
+# No daemon, no listening port, no tunnel (prod's overlay cannot be tunnelled),
+# and no container names to resolve, so prod redeploys cannot break it.
+#
+# There is no catalog service: a table's current state is its newest metadata
+# JSON under <warehouse>/<table>/metadata/, resolved at call time and exposed
+# as a view named after the table directory.
+#
+# Safety: before user SQL runs, the session pins external access to the lake
+# prefixes (iceberg/ metadata + era5/ data files) and locks the configuration
+# -- anything else, notably backups/ and all local files, is refused by
+# DuckDB itself, and the lockdown cannot be SET away. The provisioned S3
+# keypair is read-write, so a write *inside* those prefixes is still possible
+# until a scoped read-only keypair exists (see infra/ops/README.md).
+#
+# Credentials are resolved at call time, never stored here: the target host's
+# /etc/thermograph.env (THERMOGRAPH_LAKE_S3_*) wins if present; otherwise the
+# calling machine decrypts the SOPS vault and feeds the two values to the
+# remote shell over stdin (never argv, so never visible in `ps`).
+#
+# Any extra arguments are passed straight through to the duckdb CLI, so -c,
+# -json, -csv, -line, -f etc. all work. With `-f -`, stdin is forwarded and
+# read as piped SQL. A single bare argument is treated as `-c` SQL.
+set -euo pipefail
+
+KEYFILE="${THERMOGRAPH_AGENT_KEY:-$HOME/.ssh/thermograph_agent_ed25519}"
+
+usage() {
+  sed -n '2,8p' "$0" | sed 's/^# \{0,1\}//' >&2
+  echo "environments: dev | beta | prod" >&2
+  exit 2
+}
+
+env_name="${1:-}"
+[ -n "$env_name" ] || usage
+shift
+
+case "$env_name" in
+  dev)  ssh_target= ;;
+  beta) ssh_target=agent@75.119.132.91 ;;
+  prod) ssh_target=agent@169.58.46.181 ;;
+  -h|--help) usage ;;
+  *) echo "iceberg: unknown environment '$env_name' (want: dev|beta|prod)" >&2; exit 2 ;;
+esac
+
+[ $# -gt 0 ] || usage
+
+# The engine image: duckdb CLI with the httpfs + iceberg extensions installed
+# at build time, so a query needs no downloads. Built on the target host the
+# first time it's needed; the tag is a hash of this Dockerfile, so editing it
+# here rolls every host forward automatically on the next call.
+dockerfile=$(cat <<'DOCKERFILE'
+FROM debian:bookworm-slim
+RUN apt-get update \
+ && apt-get install -y --no-install-recommends ca-certificates curl \
+ && rm -rf /var/lib/apt/lists/*
+RUN curl -fsSL https://github.com/duckdb/duckdb/releases/download/v1.5.5/duckdb_cli-linux-amd64.gz \
+      | gunzip > /usr/local/bin/duckdb \
+ && chmod +x /usr/local/bin/duckdb
+RUN duckdb -c "INSTALL httpfs; INSTALL iceberg;"
+COPY <<'ENTRY' /usr/local/bin/iceberg-query
+#!/bin/sh
+# Entrypoint of the thermograph-iceberg image; run by iceberg.sh, not directly.
+set -eu
+: "${LAKE_S3_ACCESS_KEY:?}" "${LAKE_S3_SECRET_KEY:?}"
+WAREHOUSE="${LAKE_WAREHOUSE:-s3://era5-thermograph/iceberg}"
+ENDPOINT="${LAKE_S3_ENDPOINT:-eu2.contabostorage.com}"
+# Prefixes a query may touch. era5/ is needed because era5_daily was built
+# with add_files over the existing hive parquet: its metadata lives in the
+# warehouse but its data files stay in place under era5/daily/.
+ALLOWED="${LAKE_ALLOWED_DIRS:-$WAREHOUSE/,s3://era5-thermograph/era5/}"
+
+esc() { printf %s "$1" | sed "s/'/''/g"; }
+SECRET="CREATE SECRET lake (TYPE s3, KEY_ID '$(esc "$LAKE_S3_ACCESS_KEY")', SECRET '$(esc "$LAKE_S3_SECRET_KEY")', ENDPOINT '$ENDPOINT', REGION 'default', URL_STYLE 'path');"
+
+# One view per table dir, over its newest metadata JSON (numeric version wins,
+# so v10 beats v9 and 00010-... beats 00009-...). grep drops statement noise
+# like CREATE SECRET's "true" row; an empty warehouse yields no views.
+VIEWS=$(duckdb -batch -noheader -list \
+  -cmd "LOAD httpfs; $SECRET" \
+  -c "SELECT 'CREATE VIEW \"' || tbl || '\" AS SELECT * FROM iceberg_scan(''' || file || ''');'
+      FROM (SELECT file,
+                   split_part(replace(file, '$WAREHOUSE/', ''), '/', 1) AS tbl,
+                   row_number() OVER (
+                     PARTITION BY split_part(replace(file, '$WAREHOUSE/', ''), '/', 1)
+                     ORDER BY coalesce(try_cast(regexp_extract(parse_filename(file), '[0-9]+') AS BIGINT), -1) DESC,
+                              file DESC) AS rn
+            FROM glob('$WAREHOUSE/*/metadata/*.metadata.json'))
+      WHERE rn = 1;" | grep '^CREATE VIEW ' || true)
+
+# Lock the session down BEFORE user SQL: external access is pinned to the
+# allowed prefixes, local files are unreachable, and the config can't be
+# un-SET. Views bind lazily, so reads still work under the lockdown.
+allowed_sql=
+oifs=$IFS; IFS=,
+for d in $ALLOWED; do allowed_sql="$allowed_sql${allowed_sql:+, }'$d'"; done
+IFS=$oifs
+
+INIT="LOAD httpfs; LOAD iceberg; $SECRET $VIEWS
+SET allowed_directories=[$allowed_sql];
+SET enable_external_access=false;
+SET lock_configuration=true;"
+
+# A single bare argument is the SQL itself (dbq.sh calling convention).
+if [ $# -eq 1 ] && [ "${1#-}" = "$1" ]; then set -- -c "$1"; fi
+
+# duckdb has no "-f - means stdin" convention; hand it the real thing.
+i=0; n=$#; prev=
+while [ "$i" -lt "$n" ]; do
+  a=$1; shift
+  if [ "$prev" = "-f" ] && [ "$a" = "-" ]; then a=/dev/stdin; fi
+  prev=$a
+  set -- "$@" "$a"
+  i=$((i+1))
+done
+
+# The .output pair silences the init's own result rows (CREATE SECRET prints
+# a "true"); errors still reach stderr, and user SQL output is untouched.
+exec duckdb -batch -cmd ".output /dev/null" -cmd "$INIT" -cmd ".output" "$@"
+ENTRY
+RUN chmod +x /usr/local/bin/iceberg-query
+DOCKERFILE
+)
+
+tag="thermograph-iceberg:$(printf '%s' "$dockerfile" | sha256sum | cut -c1-12)"
+b64=$(printf '%s' "$dockerfile" | base64 -w0)
+
+# Quote the duckdb arguments so they survive the remote shell intact.
+args=$(printf '%q ' "$@")
+
+# Credentials: env override first, then a call-time sops decrypt of the vault
+# on the calling machine. Either may come up empty here -- the remote side
+# still gets a chance to fill them from its own /etc/thermograph.env.
+ak="${THERMOGRAPH_LAKE_S3_ACCESS_KEY:-}"
+sk="${THERMOGRAPH_LAKE_S3_SECRET_KEY:-}"
+if [ -z "$ak" ] || [ -z "$sk" ]; then
+  repo_root=$(cd -- "$(dirname -- "$0")/../.." && pwd)
+  vault="${THERMOGRAPH_LAKE_VAULT:-$repo_root/infra/deploy/secrets/prod.yaml}"
+  sops_bin=$(command -v sops || echo "$HOME/.local/bin/sops")
+  if [ -r "$vault" ] && [ -x "$sops_bin" ]; then
+    ak=$("$sops_bin" -d --extract '["THERMOGRAPH_LAKE_S3_ACCESS_KEY"]' "$vault" 2>/dev/null || true)
+    sk=$("$sops_bin" -d --extract '["THERMOGRAPH_LAKE_S3_SECRET_KEY"]' "$vault" 2>/dev/null || true)
+  fi
+fi
+
+# The engine image is (re)built on the target host only when its tag is
+# missing, then run with the credentials passed via environment -- docker
+# inherits them from the remote shell, which read them from stdin, so they
+# never appear on a command line. The rest of stdin flows through to duckdb.
+remote=$(cat <<REMOTE
+set -eu
+IFS= read -r ak; IFS= read -r sk
+if [ -r /etc/thermograph.env ]; then
+  hak=\$(sed -n 's/^THERMOGRAPH_LAKE_S3_ACCESS_KEY=//p' /etc/thermograph.env | tail -n1)
+  hsk=\$(sed -n 's/^THERMOGRAPH_LAKE_S3_SECRET_KEY=//p' /etc/thermograph.env | tail -n1)
+  if [ -n "\$hak" ] && [ -n "\$hsk" ]; then ak=\$hak sk=\$hsk; fi
+fi
+if [ -z "\$ak" ] || [ -z "\$sk" ]; then
+  echo "iceberg: no lake credentials (vault decrypt failed on the caller and no THERMOGRAPH_LAKE_S3_* in /etc/thermograph.env)" >&2
+  exit 1
+fi
+export LAKE_S3_ACCESS_KEY="\$ak" LAKE_S3_SECRET_KEY="\$sk"
+docker image inspect $tag >/dev/null 2>&1 \
+  || echo $b64 | base64 -d | docker build -q -t $tag - >/dev/null
+exec docker run --rm -i -e LAKE_S3_ACCESS_KEY -e LAKE_S3_SECRET_KEY $tag iceberg-query $args
+REMOTE
+)
+
+# Stdin is forwarded only for the documented `-f -` form. Anything else gets
+# just the credential lines -- unconditionally forwarding an idle stdin would
+# leave the local pipeline waiting on input the query never reads.
+want_stdin=false
+prev=
+for a in "$@"; do
+  if [ "$prev" = "-f" ] && [ "$a" = "-" ]; then want_stdin=true; fi
+  prev=$a
+done
+
+feed() {
+  printf '%s\n%s\n' "$ak" "$sk" || true
+  if $want_stdin; then cat || true; fi
+}
+
+if [ -z "$ssh_target" ]; then
+  feed | bash -c "$remote"
+else
+  feed | ssh -i "$KEYFILE" -o StrictHostKeyChecking=no -o ConnectTimeout=15 \
+    "$ssh_target" "$remote"
+fi