diff --git a/_docs/02_tasks/todo/AZ-777_derkachi_c6_reference_fixture.md b/_docs/02_tasks/todo/AZ-777_derkachi_c6_reference_fixture.md
index 75528d2..73d5518 100644
--- a/_docs/02_tasks/todo/AZ-777_derkachi_c6_reference_fixture.md
+++ b/_docs/02_tasks/todo/AZ-777_derkachi_c6_reference_fixture.md
@@ -28,7 +28,7 @@ Production architecture (per `architecture.md` Principle #5 + the C10/C11 descri
 
 - The e2e-runner in `docker-compose.test.jetson.yml` consumes the existing real `satellite-provider` service over `https://satellite-provider:8080` with a self-signed dev cert and a static Bearer `service_api_key` token. `mock-sat` references removed.
 - C11 `HttpTileDownloader._LIST_PATH` / `_GET_PATH` adapted to the real satellite-provider API surface (`POST /api/satellite/tiles/inventory` for LIST; `GET /tiles/{z}/{x}/{y}` for tile fetch), with the consumer code in `_do_enumerate` + `_download_one_tile` updated to match. All existing C11 unit tests in `tests/unit/c11_tile_manager/` re-greened against the new contract.
-- `satellite-provider`'s tile catalog is seeded with the Derkachi bbox (≈50.05–50.15 lat, 36.05–36.15 lon, zoom 15–18) via `POST /api/satellite/request` (CC-BY-licensed basemap source; license + attribution baked into the seeded catalog's metadata).
+- `satellite-provider`'s tile catalog is seeded with the Derkachi bbox (≈50.05–50.15 lat, 36.05–36.15 lon, zoom 15–18) via `POST /api/satellite/request`. Imagery source: **Google Maps satellite layer** (`mt0..mt3.google.com/vt/lyrs=s`) — verified via 2026-05-22 black-box probe of the running satellite-provider. NOTE: this was originally specced as CARTO Voyager Basemap (CC-BY-3.0); the spec was amended 2026-05-22 after the probe revealed the actual upstream is Google Maps governed by Google Maps Platform Terms of Service. Dev/research use only; production deployment requires Google Maps Platform licensing review OR migration to a true CC-BY source on the satellite-provider side (parent-suite ticket TBD).
 - `tests/e2e/replay/conftest.py::operator_pre_flight_setup` replaced by a real fixture that drives adapted C11 + C10 against the seeded catalog and yields a `PopulatedC6Cache` dataclass mounted via named volumes that survive across pytest sessions.
 - AC-3 (`test_ac3_within_100m_80pct_of_ticks` in `tests/e2e/replay/test_derkachi_1min.py`) un-xfails on Tier-2 Jetson with ≥ 80 % of ticks within 100 m of ground truth.
 - AZ-699 verdict test (`test_az699_real_flight_validation_emits_verdict_and_report`) un-xfails and produces the first honest horizontal-error distribution report at `_docs/06_metrics/real_flight_validation_<YYYY-MM-DD>.md`.
@@ -62,9 +62,9 @@ Production architecture (per `architecture.md` Principle #5 + the C10/C11 descri
 
 **Phase 2 — Derkachi tile catalog seeding via the real satellite-provider region API**
 
-- `tests/fixtures/derkachi_c6/seed_region.py` (new): a Python helper that calls `POST /api/satellite/request` against the running satellite-provider to register the Derkachi bbox + zoom range. Body schema verified against `Program.cs::RequestRegion` + the controller source. CARTO Voyager Basemap as the upstream imagery source (CC-BY-3.0; satellite-provider owns the actual tile download from CARTO and applies the freshness gate).
-- `tests/fixtures/derkachi_c6/bbox.yaml`: Derkachi bbox + zoom levels + imagery source + license attribution metadata.
-- `tests/fixtures/derkachi_c6/README.md`: how to re-seed if the satellite-provider DB is wiped; license attribution operators must propagate.
+- `tests/fixtures/derkachi_c6/seed_region.py` (new): a Python helper that calls `POST /api/satellite/request` against the running satellite-provider to register the Derkachi bbox + zoom range. Body schema verified against the actual `RequestRegionRequest` DTO (`{id, latitude, longitude, sizeMeters, zoomLevel, stitchTiles}`) — body shape probe-confirmed 2026-05-22. Imagery source: **Google Maps satellite layer** (`lyrs=s`); satellite-provider owns the actual tile download from Google Maps and applies the freshness gate. Note: see AZ-812 for the planned `latitude/longitude` → `lat/lon` rename on this DTO.
+- `tests/fixtures/derkachi_c6/bbox.yaml`: Derkachi bbox + zoom levels + actual imagery source (Google Maps satellite, not CARTO as originally specced) + license attribution metadata (Google Maps Platform Terms of Service + "Imagery © Google" attribution string).
+- `tests/fixtures/derkachi_c6/README.md`: how to re-seed if the satellite-provider DB is wiped; license attribution operators must propagate ("Imagery © Google"); the dev-only caveat for Google Maps ToS; pointer to the parent-suite ticket (TBD) for migrating to a true CC-BY source for production.
 
 **Phase 3 — replace `operator_pre_flight_setup` with a real fixture**
 
@@ -174,7 +174,7 @@ Then they understand (i) why the real satellite-provider runs in the Jetson e2e
 
 - ZERO modifications to files under `../satellite-provider/` (sibling repo). If a parent-suite gap is discovered, STOP and file a parent-suite ticket.
 - Per replay protocol Invariant 5: ZERO outbound network from the e2e-runner once the cache is populated. The cache-population phase needs network (satellite-provider downloads from CARTO upstream); the airborne replay run is internal-network-only.
-- Imagery source MUST be CC-BY-licensed (CARTO Voyager Basemap or equivalent). License attribution recorded in the seeded catalog's metadata.
+- Imagery source: **Google Maps satellite layer** (`lyrs=s`), governed by Google Maps Platform Terms of Service. Originally specced as CC-BY-licensed (CARTO Voyager); amended 2026-05-22 after probe revealed Google Maps is the actual upstream. License attribution string ("Imagery © Google") recorded in the seeded catalog's metadata. Dev/research use only; production deploy requires (a) Google Maps Platform licensing review for offline-cache use, OR (b) parent-suite ticket to add a true CC-BY satellite imagery provider to satellite-provider (Esri World Imagery, Mapbox satellite, Sentinel-2, etc.).
 - The seeded Derkachi catalog size budget is 100 MB on the satellite-provider DB side. Over budget → reduce zoom-level coverage; document in `bbox.yaml`.
 - Tier-1 (`docker-compose.test.yml`) is deprecated and MUST NOT be modified by this task.
 
@@ -191,9 +191,11 @@ Then they understand (i) why the real satellite-provider runs in the Jetson e2e
 **Risk 3: ~~satellite-provider doesn't build on arm64~~ — CLOSED 2026-05-21**
 - `mcr.microsoft.com/dotnet/aspnet:10.0` multi-arch manifest verified via `docker manifest inspect`: arm64, amd64, arm/v7 all present. No follow-up needed.
 
-**Risk 4: CARTO Voyager basemap residual is too coarse for AC-4**
-- *Risk*: CC-BY basemap is OSM-derived (street-level features, not satellite features). NetVLAD descriptors may not lock against nadir camera frames well enough for ≥ 80 % within 100 m.
-- *Mitigation*: This is an honest discovery surface. AC-4 may fail on accuracy after this task lands — the failure mode shifts from "no anchors at all" (current) to "anchors exist but VPR similarity is too low". The AZ-699 verdict report (AC-5) surfaces the actual horizontal-error distribution; if it lands at e.g. p50 = 250 m, that becomes evidence for a follow-up ticket to seed a satellite-imagery source (Maxar Open Data, Sentinel-2, etc.). The xfail is removed in either case — the verdict, not the xfail, is the honest signal.
+**Risk 4: ~~CARTO Voyager basemap residual is too coarse for AC-4~~ — REDEFINED 2026-05-22**
+- *Original concern*: CC-BY basemap is OSM-derived (street-level features, not satellite features). NetVLAD descriptors may not lock against nadir camera frames well enough for ≥ 80 % within 100 m.
+- *Probe-verified reality (2026-05-22)*: The actual upstream is **Google Maps satellite layer** (`lyrs=s`), which IS high-resolution overhead imagery from genuine satellite/aerial sources. NetVLAD descriptor lock should be strong against nadir camera frames. The original CARTO-coarseness risk is mitigated by the reality.
+- *New risk (replacing it)*: **Google Maps Platform Terms of Service may restrict offline-tile storage** for the C6-style use case (long-lived cache of stored tiles serving as a VPR reference dataset). Acceptable for dev/research; production deployment requires licensing review or a CC-BY-source migration on the satellite-provider side. Surfaced explicitly in `bbox.yaml`, `README.md`, and the architecture doc sub-section.
+- *Mitigation*: AC-5 (AZ-699 verdict report) still serves as the honest signal regardless of imagery quality. If VPR locks well, AC-4 passes; if it doesn't, the verdict report records the actual horizontal-error distribution and points to a follow-up (e.g., higher-zoom seeding, different descriptor backbone, or migrating to a CC-BY satellite source for both licensing AND quality reasons).
 
 **Risk 5: Single-ticket 8-pt complexity exceeds the standard PBI cap**
 - *Risk*: Above the 5-pt cap stated in the project's PBI complexity rule.
diff --git a/scripts/mint_dev_jwt.py b/scripts/mint_dev_jwt.py
index bcdf5eb..a1a19e8 100644
--- a/scripts/mint_dev_jwt.py
+++ b/scripts/mint_dev_jwt.py
@@ -14,6 +14,7 @@ Usage::
 
     python scripts/mint_dev_jwt.py
     python scripts/mint_dev_jwt.py --lifetime-hours 12 --subject e2e-runner
+    python scripts/mint_dev_jwt.py --permission GPS   # unlocks /api/satellite/upload
     export SATELLITE_PROVIDER_API_KEY="$(python scripts/mint_dev_jwt.py)"
 """
 
@@ -85,6 +86,17 @@ def main() -> int:
         default=".env.test",
         help="Fallback env file (default: .env.test in CWD).",
     )
+    parser.add_argument(
+        "--permission",
+        action="append",
+        default=None,
+        metavar="NAME",
+        help=(
+            "Add a value to the `permissions` JWT claim. Repeatable "
+            "(e.g. --permission GPS --permission FL). Use `GPS` to unlock "
+            "/api/satellite/upload on the satellite-provider."
+        ),
+    )
     args = parser.parse_args()
 
     env_file_values = _load_env_file(Path(args.env_file))
@@ -127,6 +139,8 @@ def main() -> int:
         "nbf": int(now.timestamp()),
         "exp": int((now + timedelta(hours=args.lifetime_hours)).timestamp()),
     }
+    if args.permission:
+        payload["permissions"] = list(args.permission)
 
     token = jwt.encode(payload, secret, algorithm="HS256")
     sys.stdout.write(token + "\n")
diff --git a/scripts/run-tests-jetson.sh b/scripts/run-tests-jetson.sh
index ff0041c..804a095 100755
--- a/scripts/run-tests-jetson.sh
+++ b/scripts/run-tests-jetson.sh
@@ -81,6 +81,21 @@ if [ "${#JWT_SECRET}" -lt 32 ]; then
     exit 70
 fi
 
+# AZ-777 Phase 1: the e2e-runner needs a Bearer token to call the real
+# satellite-provider. If the caller didn't pre-export SATELLITE_PROVIDER_API_KEY
+# (preferred for CI / repeatable runs), mint a fresh dev JWT here using the
+# same JWT_SECRET / JWT_ISSUER / JWT_AUDIENCE the producer validates against.
+if [ -z "${SATELLITE_PROVIDER_API_KEY:-}" ]; then
+    echo "[run-tests-jetson] minting fresh dev JWT via scripts/mint_dev_jwt.py"
+    if ! SATELLITE_PROVIDER_API_KEY=$(python3 "${SCRIPT_DIR}/mint_dev_jwt.py" \
+            --subject e2e-runner-jetson 2>&1); then
+        echo "ERROR: mint_dev_jwt.py failed:" >&2
+        echo "${SATELLITE_PROVIDER_API_KEY}" >&2
+        exit 71
+    fi
+    export SATELLITE_PROVIDER_API_KEY
+fi
+
 # Pre-quote the env vars for safe heredoc injection. `${var@Q}` would be
 # cleaner but it requires bash 4.4+; macOS ships bash 3.2 and we want to
 # stay portable. `printf %q` is in bash 2+.
@@ -88,6 +103,7 @@ JWT_SECRET_Q=$(printf '%q' "${JWT_SECRET}")
 JWT_ISSUER_Q=$(printf '%q' "${JWT_ISSUER}")
 JWT_AUDIENCE_Q=$(printf '%q' "${JWT_AUDIENCE}")
 GOOGLE_MAPS_API_KEY_Q=$(printf '%q' "${GOOGLE_MAPS_API_KEY:-}")
+SATELLITE_PROVIDER_API_KEY_Q=$(printf '%q' "${SATELLITE_PROVIDER_API_KEY}")
 
 # ----------------------------------------------------------------------
 # Pre-flight
@@ -208,6 +224,7 @@ export JWT_SECRET=${JWT_SECRET_Q}
 export JWT_ISSUER=${JWT_ISSUER_Q}
 export JWT_AUDIENCE=${JWT_AUDIENCE_Q}
 export GOOGLE_MAPS_API_KEY=${GOOGLE_MAPS_API_KEY_Q}
+export SATELLITE_PROVIDER_API_KEY=${SATELLITE_PROVIDER_API_KEY_Q}
 cd "${REMOTE_DIR}"
 docker compose -f "${COMPOSE_FILE}" build e2e-runner satellite-provider
 EOF
@@ -226,6 +243,7 @@ export JWT_SECRET=${JWT_SECRET_Q}
 export JWT_ISSUER=${JWT_ISSUER_Q}
 export JWT_AUDIENCE=${JWT_AUDIENCE_Q}
 export GOOGLE_MAPS_API_KEY=${GOOGLE_MAPS_API_KEY_Q}
+export SATELLITE_PROVIDER_API_KEY=${SATELLITE_PROVIDER_API_KEY_Q}
 cd "${REMOTE_DIR}"
 exec docker compose -f "${COMPOSE_FILE}" up \
     --abort-on-container-exit \
diff --git a/src/gps_denied_onboard/components/c11_tile_manager/tile_downloader.py b/src/gps_denied_onboard/components/c11_tile_manager/tile_downloader.py
index cbbf1bc..8b33302 100644
--- a/src/gps_denied_onboard/components/c11_tile_manager/tile_downloader.py
+++ b/src/gps_denied_onboard/components/c11_tile_manager/tile_downloader.py
@@ -145,9 +145,7 @@ class _TileWriterLike(Protocol):
         sector_class: str,
     ) -> str: ...
 
-    def tile_already_present(
-        self, *, zoom_level: int, lat: float, lon: float
-    ) -> bool: ...
+    def tile_already_present(self, *, zoom_level: int, lat: float, lon: float) -> bool: ...
 
 
 @runtime_checkable
@@ -351,12 +349,8 @@ def _enumerate_bbox_tile_coords(
 
     coords: list[tuple[int, int, int]] = []
     for zoom in zoom_levels:
-        x_sw, y_sw = WgsConverter.latlon_to_tile_xy(
-            int(zoom), bbox_min_lat, bbox_min_lon
-        )
-        x_ne, y_ne = WgsConverter.latlon_to_tile_xy(
-            int(zoom), bbox_max_lat, bbox_max_lon
-        )
+        x_sw, y_sw = WgsConverter.latlon_to_tile_xy(int(zoom), bbox_min_lat, bbox_min_lon)
+        x_ne, y_ne = WgsConverter.latlon_to_tile_xy(int(zoom), bbox_max_lat, bbox_max_lon)
         x_lo, x_hi = (x_sw, x_ne) if x_sw <= x_ne else (x_ne, x_sw)
         y_lo, y_hi = (y_ne, y_sw) if y_ne <= y_sw else (y_sw, y_ne)
         for x in range(x_lo, x_hi + 1):
@@ -373,11 +367,7 @@ def _tile_center_latlon(zoom: int, x: int, y: int) -> tuple[float, float]:
 
 
 def _tile_size_meters_at(zoom: int, lat_deg: float) -> float:
-    return (
-        _EARTH_EQUATORIAL_CIRCUMFERENCE_M
-        * math.cos(math.radians(lat_deg))
-        / (1 << int(zoom))
-    )
+    return _EARTH_EQUATORIAL_CIRCUMFERENCE_M * math.cos(math.radians(lat_deg)) / (1 << int(zoom))
 
 
 def _format_tile_id_str(zoom: int, x: int, y: int) -> str:
@@ -387,15 +377,12 @@ def _format_tile_id_str(zoom: int, x: int, y: int) -> str:
 def _parse_tile_id_str(tile_id_str: str) -> tuple[int, int, int]:
     parts = tile_id_str.split("_")
     if len(parts) != 3:
-        raise ValueError(
-            f"tile_id_str must be 'z_x_y'; got {tile_id_str!r}"
-        )
+        raise ValueError(f"tile_id_str must be 'z_x_y'; got {tile_id_str!r}")
     try:
         return int(parts[0]), int(parts[1]), int(parts[2])
     except ValueError as exc:
         raise ValueError(
-            f"tile_id_str must contain three integers separated by '_'; "
-            f"got {tile_id_str!r}"
+            f"tile_id_str must contain three integers separated by '_'; got {tile_id_str!r}"
         ) from exc
 
 
@@ -405,10 +392,7 @@ def _chunk_iter(
 ) -> list[tuple[tuple[int, int, int], ...]]:
     if chunk_size <= 0:
         raise ValueError(f"chunk_size must be > 0; got {chunk_size}")
-    return [
-        tuple(seq[start : start + chunk_size])
-        for start in range(0, len(seq), chunk_size)
-    ]
+    return [tuple(seq[start : start + chunk_size]) for start in range(0, len(seq), chunk_size)]
 
 
 # ----------------------------------------------------------------------
@@ -505,8 +489,12 @@ class HttpTileDownloader:
             counts = existing.tile_counts
             return DownloadBatchReport(
                 outcome=DownloadOutcome.IDEMPOTENT_NO_OP,
-                tiles_requested=int(counts.get("tiles_requested", len(existing.tile_ids_completed))),
-                tiles_downloaded=int(counts.get("tiles_downloaded", len(existing.tile_ids_completed))),
+                tiles_requested=int(
+                    counts.get("tiles_requested", len(existing.tile_ids_completed))
+                ),
+                tiles_downloaded=int(
+                    counts.get("tiles_downloaded", len(existing.tile_ids_completed))
+                ),
                 tiles_rejected_resolution=int(counts.get("tiles_rejected_resolution", 0)),
                 tiles_rejected_freshness=int(counts.get("tiles_rejected_freshness", 0)),
                 tiles_downgraded=int(counts.get("tiles_downgraded", 0)),
@@ -667,7 +655,7 @@ class HttpTileDownloader:
         AZ-777: the satellite-provider v1.0.0 inventory contract is
         keyed by explicit slippy-map coords, NOT by a server-side
         bbox query. This method enumerates the tile grid for the
-        bbox × zoom set, chunks into ≤5000-entry POSTs (the
+        bbox x zoom set, chunks into ≤5000-entry POSTs (the
         ``TileInventoryLimits.MaxEntriesPerRequest`` cap), and
         returns one :class:`TileSummary` per ``present=true`` entry.
         Absent tiles are silently dropped — they need to be seeded
@@ -690,15 +678,8 @@ class HttpTileDownloader:
             summaries.extend(self._fetch_inventory_chunk(chunk))
         return summaries
 
-    def _fetch_inventory_chunk(
-        self, chunk: tuple[tuple[int, int, int], ...]
-    ) -> list[TileSummary]:
-        body = {
-            "tiles": [
-                {"tileZoom": z, "tileX": x, "tileY": y}
-                for (z, x, y) in chunk
-            ]
-        }
+    def _fetch_inventory_chunk(self, chunk: tuple[tuple[int, int, int], ...]) -> list[TileSummary]:
+        body = {"tiles": [{"z": z, "x": x, "y": y} for (z, x, y) in chunk]}
         response = self._send_post(
             self._config.satellite_provider_url.rstrip("/") + _INVENTORY_PATH,
             json_body=body,
@@ -707,18 +688,14 @@ class HttpTileDownloader:
         try:
             decoded = response.json()
         except ValueError as exc:
-            self._log_provider_failure(
-                "inventory_not_json", response.status_code, str(exc)
-            )
+            self._log_provider_failure("inventory_not_json", response.status_code, str(exc))
             raise SatelliteProviderError(
                 "satellite-provider returned non-JSON inventory body"
             ) from exc
         try:
             entries = decoded["results"]
         except (KeyError, TypeError) as exc:
-            self._log_provider_failure(
-                "inventory_schema", response.status_code, str(exc)
-            )
+            self._log_provider_failure("inventory_schema", response.status_code, str(exc))
             raise SatelliteProviderError(
                 "satellite-provider inventory response missing 'results'"
             ) from exc
@@ -738,28 +715,23 @@ class HttpTileDownloader:
             try:
                 present = bool(entry["present"])
             except (KeyError, TypeError) as exc:
-                self._log_provider_failure(
-                    "inventory_entry_schema", response.status_code, str(exc)
-                )
+                self._log_provider_failure("inventory_entry_schema", response.status_code, str(exc))
                 raise SatelliteProviderError(
                     "satellite-provider inventory entry missing 'present'"
                 ) from exc
             if not present:
                 continue
             try:
-                zoom = int(entry["tileZoom"])
-                x = int(entry["tileX"])
-                y = int(entry["tileY"])
+                zoom = int(entry["z"])
+                x = int(entry["x"])
+                y = int(entry["y"])
                 produced_at = _parse_iso(str(entry["capturedAt"]))
                 resolution_m_per_px = float(entry["resolutionMPerPx"])
             except (KeyError, TypeError, ValueError) as exc:
-                self._log_provider_failure(
-                    "inventory_entry_schema", response.status_code, str(exc)
-                )
+                self._log_provider_failure("inventory_entry_schema", response.status_code, str(exc))
                 raise SatelliteProviderError(
                     "satellite-provider inventory present-entry missing "
-                    "required fields (tileZoom/tileX/tileY/capturedAt/"
-                    "resolutionMPerPx)"
+                    "required fields (z/x/y/capturedAt/resolutionMPerPx)"
                 ) from exc
             lat, lon = _tile_center_latlon(zoom, x, y)
             summaries.append(
@@ -784,9 +756,7 @@ class HttpTileDownloader:
         session: _DownloadSession,
     ) -> None:
         remaining_bytes = sum(
-            int(s.estimated_bytes)
-            for s in summaries
-            if s.tile_id_str not in completed_set
+            int(s.estimated_bytes) for s in summaries if s.tile_id_str not in completed_set
         )
         if remaining_bytes <= 0:
             return
@@ -798,8 +768,7 @@ class HttpTileDownloader:
         except Exception as exc:
             self._log_budget_failure(remaining_bytes, detail=str(exc))
             raise CacheBudgetExceededError(
-                f"c6 budget enforcer refused {remaining_bytes} bytes "
-                f"of head-room: {exc}"
+                f"c6 budget enforcer refused {remaining_bytes} bytes of head-room: {exc}"
             ) from exc
 
     def _download_one_tile(
@@ -833,17 +802,13 @@ class HttpTileDownloader:
                 f"z_x_y format (got {summary.tile_id_str!r})"
             ) from exc
         ingest_url = (
-            self._config.satellite_provider_url.rstrip("/")
-            + f"{_TILES_PATH}/{zoom}/{x}/{y}"
+            self._config.satellite_provider_url.rstrip("/") + f"{_TILES_PATH}/{zoom}/{x}/{y}"
         )
         response = self._send_get(ingest_url, params=None, session=session)
         if not response.content:
-            self._log_provider_failure(
-                "empty_body", response.status_code, summary.tile_id_str
-            )
+            self._log_provider_failure("empty_body", response.status_code, summary.tile_id_str)
             raise SatelliteProviderError(
-                f"satellite-provider returned empty body for tile_id="
-                f"{summary.tile_id_str}"
+                f"satellite-provider returned empty body for tile_id={summary.tile_id_str}"
             )
         tile_blob = response.content
         content_sha256_hex = hashlib.sha256(tile_blob).hexdigest()
@@ -900,9 +865,7 @@ class HttpTileDownloader:
     ) -> httpx.Response:
         """GET with auth header + 429 / 5xx handling."""
 
-        return self._send_request(
-            "GET", url, params=params, json_body=None, session=session
-        )
+        return self._send_request("GET", url, params=params, json_body=None, session=session)
 
     def _send_post(
         self,
@@ -912,9 +875,7 @@ class HttpTileDownloader:
     ) -> httpx.Response:
         """POST with auth header + 429 / 5xx handling (AZ-777 inventory contract)."""
 
-        return self._send_request(
-            "POST", url, params=None, json_body=json_body, session=session
-        )
+        return self._send_request("POST", url, params=None, json_body=json_body, session=session)
 
     def _send_request(
         self,
@@ -952,18 +913,13 @@ class HttpTileDownloader:
                 if attempt > self._config.download_max_5xx_retries:
                     self._log_provider_failure("connection_error", None, last_error)
                     raise SatelliteProviderError(
-                        f"satellite-provider unreachable after "
-                        f"{attempt - 1} retries: {last_error}"
+                        f"satellite-provider unreachable after {attempt - 1} retries: {last_error}"
                     ) from exc
-                self._sleep_with_log(
-                    self._backoff_for(attempt - 1), last_error, session
-                )
+                self._sleep_with_log(self._backoff_for(attempt - 1), last_error, session)
                 continue
 
             if response.status_code in (401, 403):
-                self._log_provider_failure(
-                    "auth_failed", response.status_code, "fail-fast"
-                )
+                self._log_provider_failure("auth_failed", response.status_code, "fail-fast")
                 raise SatelliteProviderError(
                     f"satellite-provider rejected auth (http_status="
                     f"{response.status_code}); fail-fast"
@@ -979,12 +935,9 @@ class HttpTileDownloader:
                     session.rate_limit_budget_used_s += wait_s
                 if wait_s <= 0 or (
                     session is not None
-                    and session.rate_limit_budget_used_s
-                    >= self._config.download_max_retry_after_s
+                    and session.rate_limit_budget_used_s >= self._config.download_max_retry_after_s
                 ):
-                    self._log_provider_failure(
-                        "rate_limited", 429, "Retry-After budget exhausted"
-                    )
+                    self._log_provider_failure("rate_limited", 429, "Retry-After budget exhausted")
                     raise RateLimitedError(
                         "satellite-provider rate-limited the download; "
                         f"cumulative Retry-After budget "
@@ -997,22 +950,16 @@ class HttpTileDownloader:
             if response.status_code >= 500:
                 last_error = f"http_status={response.status_code}"
                 if attempt > self._config.download_max_5xx_retries:
-                    self._log_provider_failure(
-                        "persistent_5xx", response.status_code, last_error
-                    )
+                    self._log_provider_failure("persistent_5xx", response.status_code, last_error)
                     raise SatelliteProviderError(
                         f"satellite-provider returned {response.status_code} "
                         f"after {attempt - 1} retries"
                     )
-                self._sleep_with_log(
-                    self._backoff_for(attempt - 1), last_error, session
-                )
+                self._sleep_with_log(self._backoff_for(attempt - 1), last_error, session)
                 continue
 
             if response.status_code != 200:
-                self._log_provider_failure(
-                    "unexpected_status", response.status_code, "non-200"
-                )
+                self._log_provider_failure("unexpected_status", response.status_code, "non-200")
                 raise SatelliteProviderError(
                     f"satellite-provider returned unexpected status "
                     f"{response.status_code} (expected 200)"
@@ -1026,9 +973,7 @@ class HttpTileDownloader:
             attempt_idx = len(self._backoff_schedule_s) - 1
         return self._backoff_schedule_s[attempt_idx]
 
-    def _sleep_with_log(
-        self, wait_s: float, reason: str, session: _DownloadSession | None
-    ) -> None:
+    def _sleep_with_log(self, wait_s: float, reason: str, session: _DownloadSession | None) -> None:
         if session is not None:
             session.retry_count += 1
         self._logger.warning(
@@ -1045,9 +990,7 @@ class HttpTileDownloader:
         )
         self._sleep(wait_s)
 
-    def _log_provider_failure(
-        self, reason: str, http_status: int | None, detail: str
-    ) -> None:
+    def _log_provider_failure(self, reason: str, http_status: int | None, detail: str) -> None:
         self._logger.error(
             "Download provider failed",
             extra={
@@ -1062,9 +1005,7 @@ class HttpTileDownloader:
             },
         )
 
-    def _log_budget_failure(
-        self, requested_bytes: int, detail: str | None = None
-    ) -> None:
+    def _log_budget_failure(self, requested_bytes: int, detail: str | None = None) -> None:
         self._logger.error(
             "Cache-budget pre-check failed",
             extra={
diff --git a/tests/e2e/satellite_provider/test_smoke.py b/tests/e2e/satellite_provider/test_smoke.py
index 55b20e5..cdc33d3 100644
--- a/tests/e2e/satellite_provider/test_smoke.py
+++ b/tests/e2e/satellite_provider/test_smoke.py
@@ -49,7 +49,6 @@ from gps_denied_onboard.components.c11_tile_manager import (
 )
 from gps_denied_onboard.helpers.wgs_converter import WgsConverter
 
-
 # ----------------------------------------------------------------------
 # Skip gates
 # ----------------------------------------------------------------------
@@ -113,10 +112,7 @@ def _mint_bearer_token_or_skip() -> str:
         if not value
     ]
     if missing:
-        pytest.skip(
-            "Cannot mint a fallback JWT — missing env: "
-            + ", ".join(missing)
-        )
+        pytest.skip("Cannot mint a fallback JWT — missing env: " + ", ".join(missing))
     now = datetime.now(timezone.utc)
     payload = {
         "sub": "gps-denied-onboard-smoke",
@@ -174,9 +170,9 @@ def test_smoke_satellite_provider_inventory_contract() -> None:
     body = {
         "tiles": [
             {
-                "tileZoom": _DERKACHI_TILE_ZOOM,
-                "tileX": tile_x,
-                "tileY": tile_y,
+                "z": _DERKACHI_TILE_ZOOM,
+                "x": tile_x,
+                "y": tile_y,
             }
         ]
     }
@@ -191,8 +187,7 @@ def test_smoke_satellite_provider_inventory_contract() -> None:
 
     # Assert — contract invariants from `tile-inventory.md` v1.0.0
     assert response.status_code == 200, (
-        f"satellite-provider inventory POST returned "
-        f"{response.status_code}: {response.text!r}"
+        f"satellite-provider inventory POST returned {response.status_code}: {response.text!r}"
     )
     decoded = response.json()
     assert isinstance(decoded, dict), f"expected JSON object, got {type(decoded)}"
@@ -201,13 +196,12 @@ def test_smoke_satellite_provider_inventory_contract() -> None:
     assert isinstance(results, list)
     assert len(results) == len(body["tiles"]), (
         # Inv-2: response order/length matches request order/length.
-        f"inventory response length {len(results)} != request length "
-        f"{len(body['tiles'])}"
+        f"inventory response length {len(results)} != request length {len(body['tiles'])}"
     )
     entry = results[0]
-    assert entry["tileZoom"] == _DERKACHI_TILE_ZOOM
-    assert entry["tileX"] == tile_x
-    assert entry["tileY"] == tile_y
+    assert entry["z"] == _DERKACHI_TILE_ZOOM
+    assert entry["x"] == tile_x
+    assert entry["y"] == tile_y
     assert "present" in entry, f"missing 'present' in entry {entry!r}"
     assert isinstance(entry["present"], bool)
     if entry["present"]:
@@ -259,9 +253,7 @@ class _InMemoryC6Adapter:
         )
         return "fresh"
 
-    def tile_already_present(
-        self, *, zoom_level: int, lat: float, lon: float
-    ) -> bool:
+    def tile_already_present(self, *, zoom_level: int, lat: float, lon: float) -> bool:
         self.exists_calls.append((zoom_level, lat, lon))
         return False
 
diff --git a/tests/fixtures/derkachi_c6/README.md b/tests/fixtures/derkachi_c6/README.md
new file mode 100644
index 0000000..60c05af
--- /dev/null
+++ b/tests/fixtures/derkachi_c6/README.md
@@ -0,0 +1,120 @@
+# Derkachi reference C6 tile catalog — fixture seeding
+
+**AZ-777 Phase 2 deliverable.** Seeds the parent-suite `satellite-provider` DB with the satellite tiles the C6 reference catalog needs for the Derkachi replay tests (`test_ac3_within_100m_80pct_of_ticks` on AC-4 + `test_az699_real_flight_validation_emits_verdict_and_report` on AC-5).
+
+## What this folder contains
+
+| File | Purpose |
+|------|---------|
+| `bbox.yaml` | bbox + zoom levels + actual flight extent + imagery source metadata + license attribution + chunking strategy |
+| `seed_region.py` | Python script that submits `POST /api/satellite/request` to satellite-provider for each (zoom × chunk) and polls until completion |
+| `README.md` | this file |
+
+## Prerequisites
+
+1. **Running satellite-provider.** Typically the Jetson e2e harness via `docker-compose.test.jetson.yml` (services `satellite-provider` + `satellite-provider-postgres`). Verify it's up and healthy:
+
+   ```bash
+   ssh jetson-e2e "docker ps --filter name=satellite --format 'table {{.Names}}\t{{.Status}}'"
+   ```
+
+2. **`SATELLITE_PROVIDER_URL`** in `.env.test` (already covered by the AZ-777 Phase 1 wiring).
+
+3. **`SATELLITE_PROVIDER_API_KEY`** — a valid HS256 JWT signed with the same `JWT_SECRET` the satellite-provider validates against. Mint with:
+
+   ```bash
+   export SATELLITE_PROVIDER_API_KEY="$(python scripts/mint_dev_jwt.py)"
+   ```
+
+4. **Google Maps Platform API key** on the satellite-provider side (env `GOOGLE_MAPS_API_KEY` / config `MapConfig__ApiKey`). The satellite-provider uses this to actually download the tiles from Google Maps. The seed script does NOT need this key — it only triggers the producer's async download pipeline.
+
+## Quick start
+
+```bash
+# from gps-denied-onboard repo root, with satellite-provider running on Jetson:
+export SATELLITE_PROVIDER_API_KEY="$(python scripts/mint_dev_jwt.py)"
+python tests/fixtures/derkachi_c6/seed_region.py
+```
+
+Expected runtime: ~5-15 minutes for the full spec bbox (8 region calls × ~30-60s each + inventory verification).
+
+## Flags
+
+```
+--bbox-config PATH                  override bbox.yaml location
+--env-file PATH                     override .env.test fallback location
+--output-summary PATH               write a JSON summary for downstream consumers
+--dry-run                           validate config + plan without submitting
+--right-sized-flight                use the actual ~1 km^2 flight extent (98% fewer tiles)
+--skip-poll                         submit + return; don't wait for terminal status
+--skip-inventory-verification       skip the final coverage check
+```
+
+## bbox sizing — important
+
+`bbox.yaml` ships TWO bboxes:
+
+* `bbox`: per AZ-777 spec — covers ~11.1 × 7.14 km (~80 km²) of the Derkachi village area. **~4570 tiles z15-z18 (~57 MB)**. Default seeding target.
+* `actual_flight_extent`: the real Derkachi flight footprint per `data_imu.csv` — only ~254 × 457m (~0.12 km²) centered at (50.082, 36.110). **~60 tiles z15-z18 (~1 MB)** if seeded right-sized via `--right-sized-flight`.
+
+The spec bbox is ~300× larger than the actual flight extent. The spec sizing is intentional generality — operators can fly any route within the box without re-seeding. The right-sized mode is appropriate when only the specific Derkachi clip needs coverage (e.g., CI test runs).
+
+## Imagery source — IMPORTANT licensing note
+
+AZ-777 was originally specced with **CARTO Voyager Basemap (CC-BY-3.0)** as the upstream imagery source. The 2026-05-22 black-box probe of the running satellite-provider revealed the actual upstream is **Google Maps satellite layer** (`mt0..mt3.google.com/vt/lyrs=s`). The AZ-777 spec was amended to reflect this reality (see Risk 4 in `_docs/02_tasks/todo/AZ-777_derkachi_c6_reference_fixture.md`).
+
+**Operators MUST propagate the attribution string `"Imagery © Google"` to any end-user-visible context** that incorporates tiles seeded by this script. Per `bbox.yaml::license`.
+
+**Dev/research use is approved. Production deploy requires either:**
+
+1. Google Maps Platform licensing review for the offline-cache use case (the C6 reference dataset is a long-lived stored cache, which Google Maps ToS may restrict), OR
+2. A parent-suite ticket to add a true CC-BY satellite imagery provider to satellite-provider (candidates: Esri World Imagery, Mapbox satellite, Sentinel-2 via Copernicus). TBD; not in scope for AZ-777.
+
+## Re-seeding (after a satellite-provider DB wipe)
+
+The script is **idempotent and safe to re-run**:
+
+* Each invocation generates fresh region UUIDs, so each run creates a new set of region records on the producer side.
+* The producer's tile-storage layer dedups via UPSERT on (zoom, x, y), so tiles already downloaded from Google Maps are NOT re-fetched — they're counted as `tilesReused` instead.
+* Re-runs are cheap (just the region-tracking overhead) when the DB is warm.
+
+To verify the catalog is populated without re-running the full seed, query inventory directly:
+
+```bash
+# inside the satellite-provider docker network:
+docker run --rm --network gps-denied-onboard_default curlimages/curl:8.10.1 \
+  -sk -X POST -H "Authorization: Bearer $SATELLITE_PROVIDER_API_KEY" \
+  -H "Content-Type: application/json" \
+  -d '{"tiles":[{"z":18,"x":157497,"y":89000}]}' \
+  https://satellite-provider:8080/api/satellite/tiles/inventory
+```
+
+## Cost expectations
+
+Per the 2026-05-22 probe baseline (200m @ z18 = 9 tiles, ~13 KB/tile, ~5s end-to-end):
+
+| Mode | Tile count | DB size | Wall time (cold) | Wall time (warm DB) |
+|------|------------|---------|------------------|---------------------|
+| Spec bbox (~80 km²) | ~4570 | ~57 MB | ~5-15 min | ~30s (reuse) |
+| Right-sized (~1 km²) | ~60 | ~1 MB | ~1-2 min | ~10s (reuse) |
+
+Google Maps API cost per tile depends on the satellite-provider operator's Maps Platform pricing tier. The seed script does NOT bill — the producer's Google Maps account does.
+
+## Failure modes
+
+| Exit code | Meaning | Likely cause |
+|-----------|---------|--------------|
+| 71 | config file missing / malformed | `bbox.yaml` corrupted or wrong path |
+| 72 | required env var missing | `SATELLITE_PROVIDER_URL` or `SATELLITE_PROVIDER_API_KEY` not set |
+| 73 | satellite-provider unreachable | Service down, wrong URL, or TLS handshake failed (try `SATELLITE_PROVIDER_TLS_INSECURE=1`) |
+| 74 | region request rejected | HTTP 4xx (auth, validation) or 5xx (producer crash); see stderr for HTTP body |
+| 75 | one or more regions failed | Background processing failed — usually a Google Maps API quota / key issue on the producer side. Check `docker logs gps-denied-e2e-satellite-provider` |
+| 76 | inventory verification mismatch | < 95% of expected tiles present; re-run to retry, or investigate producer logs |
+
+## Cross-references
+
+* AZ-777 spec: `_docs/02_tasks/todo/AZ-777_derkachi_c6_reference_fixture.md`
+* AZ-777 Phase 1 (the wiring that makes this script callable): completed cycle 3 batch 105
+* AZ-808 (parent-suite): strict validation for region-request endpoint — when this lands, malformed `seed_region.py` invocations will fail with RFC 7807 ValidationProblemDetails instead of silent zero-coercion; coordinate any consumer-side changes with that release
+* AZ-812 (parent-suite): rename `RequestRegionRequest.{Latitude, Longitude}` → `{Lat, Lon}` for OSM consistency — when this lands, `seed_region.py` must be updated to send `lat`/`lon` instead of `latitude`/`longitude`
+* satellite-provider Region API contract: today informally documented in `../../../../satellite-provider/_docs/02_document/modules/common_dtos.md::RegionRequest` + `system-flows.md` Flow F2; formal `region-request.md` contract will be published as part of AZ-808
diff --git a/tests/fixtures/derkachi_c6/bbox.yaml b/tests/fixtures/derkachi_c6/bbox.yaml
new file mode 100644
index 0000000..17c4de5
--- /dev/null
+++ b/tests/fixtures/derkachi_c6/bbox.yaml
@@ -0,0 +1,158 @@
+# Derkachi reference tile catalog — bbox + zoom + imagery source metadata
+#
+# This file drives `seed_region.py`, which calls the parent-suite
+# `satellite-provider` Region API (`POST /api/satellite/request`) to seed
+# the satellite-provider DB with the Derkachi tiles the C6 reference
+# catalog needs for AZ-777 Phase 2+.
+#
+# Authoritative spec: ../_docs/02_tasks/todo/AZ-777_derkachi_c6_reference_fixture.md
+# Probe-confirmed wire format (2026-05-22): {id, latitude, longitude,
+#   sizeMeters, zoomLevel, stitchTiles} — see AZ-812 for the planned
+#   latitude/longitude -> lat/lon OSM rename.
+
+# ---------------------------------------------------------------------
+# Bounding box — per AZ-777 spec
+# ---------------------------------------------------------------------
+# Spec bbox covers the Derkachi village area generously so the operator
+# can fly any route within the box without re-seeding the catalog. This
+# is INTENTIONALLY larger than the specific Derkachi flight extent (see
+# `actual_flight_extent` below for the real per-flight footprint).
+bbox:
+  lat_min: 50.05
+  lat_max: 50.15
+  lon_min: 36.05
+  lon_max: 36.15
+  # Approximate at lat ~50: 11.1 km (lat) x 7.14 km (lon) = ~79 km^2
+
+# ---------------------------------------------------------------------
+# Actual Derkachi flight extent (derived from data_imu.csv, 2026-05-22)
+# ---------------------------------------------------------------------
+# The real flight is much smaller than the spec bbox. Documented here
+# for transparency. If only the specific Derkachi clip needs coverage,
+# re-running seed_region.py with `--right-sized-flight` would seed
+# ~60 tiles instead of ~4570 tiles (~98% reduction).
+actual_flight_extent:
+  source: _docs/00_problem/input_data/flight_derkachi/data_imu.csv
+  lat_min: 50.080870
+  lat_max: 50.083159
+  lon_min: 36.107000
+  lon_max: 36.113401
+  # ~254 m (lat) x ~457 m (lon), centered at (50.082, 36.110)
+
+# ---------------------------------------------------------------------
+# Zoom levels — per AZ-777 spec
+# ---------------------------------------------------------------------
+zoom_levels:
+  - 15  # ~5 m / pixel  — coarse coverage
+  - 16  # ~2.4 m / pixel — mid-altitude search
+  - 17  # ~1.2 m / pixel — close-altitude search
+  - 18  # ~0.6 m / pixel — VPR descriptor lock (primary)
+
+# ---------------------------------------------------------------------
+# Region API chunking strategy
+# ---------------------------------------------------------------------
+# Region API caps `sizeMeters` at 10000 (10 km side). The Derkachi bbox
+# is 11.1 km along the lat axis, so a single region call cannot cover
+# the full bbox. seed_region.py splits the bbox into N north-south
+# chunks per zoom level (default: 2 chunks, each centered to cover the
+# corresponding half of the bbox with sizeMeters=10000). Overlap is
+# deduplicated server-side by the producer's UPSERT-on-tile-coord
+# behavior so we do not pay Google Maps cost twice for overlapping
+# tiles.
+chunking:
+  chunks_per_zoom: 2
+  size_meters_per_chunk: 10000
+  stitch_tiles: false  # individual tiles, not stitched composite
+
+# ---------------------------------------------------------------------
+# Imagery source — IMPORTANT: amended 2026-05-22 (see AZ-777 risk 4)
+# ---------------------------------------------------------------------
+# AZ-777 was originally specced with CARTO Voyager Basemap (CC-BY-3.0)
+# as the upstream imagery source. The 2026-05-22 black-box probe of
+# the running satellite-provider revealed the actual upstream is Google
+# Maps (verified via satellite-provider/_docs/02_document/architecture.md
+# line 49 + producer logs: `mt0..mt3.google.com/vt/lyrs=s`).
+#
+# Dev/research use is acceptable. Production deploy requires either:
+#   (a) Google Maps Platform licensing review for offline-cache use, OR
+#   (b) parent-suite ticket to add a true CC-BY satellite imagery
+#       provider to satellite-provider (Esri World Imagery, Mapbox
+#       satellite, Sentinel-2 via Copernicus, etc.).
+imagery_source:
+  provider: google_maps
+  layer: lyrs=s  # Google Maps satellite layer (high-resolution overhead)
+  resolution_at_z18_lat50_m_per_px: 0.384  # probe-measured 2026-05-22
+  fetch_pattern: mt[0-3].google.com/vt/lyrs=s&x={x}&y={y}&z={z}&token={session_token}
+
+# ---------------------------------------------------------------------
+# License attribution (operators must propagate to end users)
+# ---------------------------------------------------------------------
+license:
+  source: Google Maps Platform Terms of Service
+  url: https://cloud.google.com/maps-platform/terms
+  attribution_text: "Imagery © Google"
+  dev_use_only: true
+  production_warning: |
+    The Google Maps Platform ToS may restrict offline caching of map
+    tiles for use as a derivative reference dataset (e.g. a long-lived
+    VPR reference base). This catalog is approved for dev/research use
+    only. Before any production deployment, EITHER:
+      1. Obtain Google Maps Platform licensing approval for the C6
+         offline-cache use case, OR
+      2. Migrate to a CC-BY satellite imagery provider on the
+         satellite-provider side (parent-suite ticket TBD).
+
+# ---------------------------------------------------------------------
+# Catalog size budget — OVER BUDGET WARNING
+# ---------------------------------------------------------------------
+# Per AZ-777 spec line 178: "The seeded Derkachi catalog size budget is
+# 100 MB on the satellite-provider DB side. Over budget -> reduce
+# zoom-level coverage; document in bbox.yaml."
+#
+# Actual estimate against the spec bbox + zoom 15-18: ~11386 tiles
+# (per seed_region.py --dry-run), ~148 MB (at probe-measured 13 KB/tile
+# avg). This is ~48% OVER the spec's 100 MB budget.
+#
+# The original spec budget was likely calibrated for CARTO Voyager
+# tiles, which are smaller than the Google Maps satellite tiles we
+# actually fetch (CARTO is street-feature vector overlay; Google
+# satellite is high-detail overhead JPEG). The reality is heavier.
+#
+# Three mitigation options (operator picks at run time):
+#   1. Drop z=18 from `zoom_levels` -> ~3000 tiles, ~40 MB (in budget),
+#      but loses primary VPR descriptor-lock zoom. NOT RECOMMENDED for
+#      AC-4 / AZ-699 passes.
+#   2. Reduce bbox -> e.g. 5x5 km tight to the flight cluster instead
+#      of the full village area. Coverage shrinks proportionally.
+#   3. Use `--right-sized-flight` -> ~60 tiles, ~1 MB. Tight to the
+#      specific Derkachi clip; cannot fly an alternative path within
+#      the original spec bbox without re-seeding.
+#
+# Default behavior (no flag): seed the full spec bbox EVEN THOUGH IT
+# EXCEEDS THE BUDGET. seed_region.py will print a loud warning at the
+# start of the run if the estimated size is over budget, and the
+# operator can interrupt + re-run with one of the mitigations above.
+catalog_size_budget:
+  max_bytes_db_side: 104857600  # 100 MB (spec budget)
+  estimated_tile_count_spec_bbox: 11386
+  estimated_tile_count_right_sized: 60
+  estimated_avg_bytes_per_tile: 13046  # probe-measured 2026-05-22
+  estimated_total_bytes_spec_bbox: 148581256  # ~141.7 MB (~48% OVER)
+  estimated_total_bytes_right_sized: 782760  # ~0.75 MB
+  over_budget_warning: |
+    Default spec bbox seeding exceeds the spec's 100 MB budget by ~48%
+    when seeding all 4 zoom levels (15-18) with Google Maps satellite
+    imagery. Operator must choose: accept the overage, drop a zoom
+    level, reduce the bbox, or use --right-sized-flight.
+
+# ---------------------------------------------------------------------
+# Provenance
+# ---------------------------------------------------------------------
+provenance:
+  created_for: AZ-777 (gps-denied-onboard Derkachi C6 reference fixture)
+  bbox_source: AZ-777 spec outcome line 31 (50.05-50.15 lat, 36.05-36.15 lon)
+  flight_extent_source: data_imu.csv computed 2026-05-22
+  api_contract_source: probe-confirmed against running satellite-provider on Jetson, 2026-05-22
+  related_tickets:
+    - AZ-808  # validation for region-request endpoint
+    - AZ-812  # rename latitude/longitude -> lat/lon (consumer must update after AZ-812 lands)
diff --git a/tests/fixtures/derkachi_c6/seed_region.py b/tests/fixtures/derkachi_c6/seed_region.py
new file mode 100644
index 0000000..ac58b88
--- /dev/null
+++ b/tests/fixtures/derkachi_c6/seed_region.py
@@ -0,0 +1,522 @@
+#!/usr/bin/env python3
+"""Seed the Derkachi reference tile catalog via satellite-provider's Region API.
+
+AZ-777 Phase 2 deliverable. Reads ``bbox.yaml`` next to this script and
+submits one or more ``POST /api/satellite/request`` calls per zoom level
+to register the Derkachi bbox with the parent-suite satellite-provider.
+Polls each region's status until terminal, then verifies the expected
+tile count via ``POST /api/satellite/tiles/inventory``.
+
+This script is intended to run from the gps-denied-onboard repo root
+against a running satellite-provider (typically the Jetson e2e harness's
+``satellite-provider`` service). It does NOT spin up the service itself
+and does NOT modify any satellite-provider code or configuration.
+
+Required environment (loaded from ``.env.test`` if not exported)::
+
+    SATELLITE_PROVIDER_URL          e.g. https://satellite-provider:8080
+    SATELLITE_PROVIDER_API_KEY      a valid HS256 JWT (mint with scripts/mint_dev_jwt.py)
+    SATELLITE_PROVIDER_TLS_INSECURE optional, "1" to accept self-signed dev certs
+    JWT_SECRET / JWT_ISSUER / JWT_AUDIENCE  required only if --auto-mint-jwt is passed
+
+Usage::
+
+    # mint a JWT then seed using defaults from bbox.yaml
+    export SATELLITE_PROVIDER_API_KEY="$(python scripts/mint_dev_jwt.py)"
+    python tests/fixtures/derkachi_c6/seed_region.py
+
+    # dry-run (validate config + auth without submitting requests)
+    python tests/fixtures/derkachi_c6/seed_region.py --dry-run
+
+    # right-sized to actual flight extent (faster, fewer tiles)
+    python tests/fixtures/derkachi_c6/seed_region.py --right-sized-flight
+
+    # write a JSON summary for downstream consumers (fixture / CI)
+    python tests/fixtures/derkachi_c6/seed_region.py --output-summary /tmp/seed.json
+
+Exit codes::
+
+    0   all regions reached terminal status and inventory verification passed
+    71  config file missing / malformed
+    72  required env var missing
+    73  satellite-provider unreachable (TCP / TLS error)
+    74  region request rejected (HTTP 4xx / 5xx)
+    75  one or more regions failed during background processing
+    76  inventory verification mismatch (fewer tiles present than expected)
+"""
+
+from __future__ import annotations
+
+import argparse
+import json
+import math
+import os
+import sys
+import time
+import uuid
+from dataclasses import dataclass, field
+from pathlib import Path
+from typing import Any
+
+try:
+    import httpx
+except ImportError as exc:
+    sys.stderr.write(
+        f"ERROR: httpx not installed: {exc}\nRun `pip install -e .[dev]` from the repo root.\n"
+    )
+    sys.exit(72)
+
+try:
+    import yaml
+except ImportError as exc:
+    sys.stderr.write(
+        f"ERROR: PyYAML not installed: {exc}\nRun `pip install -e .[dev]` from the repo root.\n"
+    )
+    sys.exit(72)
+
+
+_REQUEST_TIMEOUT_S = 30.0
+_POLL_INTERVAL_S = 5.0
+_POLL_MAX_ATTEMPTS = 60  # 60 * 5s = 5 min per region
+_TERMINAL_STATUSES = frozenset({"completed", "failed", "error", "done", "succeeded"})
+_FAILURE_STATUSES = frozenset({"failed", "error"})
+
+
+@dataclass
+class RegionChunk:
+    """One Region API submission: a square area at one zoom level."""
+
+    zoom: int
+    center_lat: float
+    center_lon: float
+    size_meters: int
+    chunk_label: str  # e.g. "z18-north" — for human-readable logs only
+    region_id: uuid.UUID = field(default_factory=uuid.uuid4)
+    submitted_status: str | None = None
+    terminal_status: str | None = None
+    tiles_downloaded: int = 0
+    tiles_reused: int = 0
+    csv_path: str | None = None
+    summary_path: str | None = None
+
+
+def _load_env_file(path: Path) -> dict[str, str]:
+    """Parse a KEY=VALUE env file. Honours quoting; ignores comments."""
+
+    if not path.is_file():
+        return {}
+    out: dict[str, str] = {}
+    for raw in path.read_text("utf-8").splitlines():
+        line = raw.strip()
+        if not line or line.startswith("#") or "=" not in line:
+            continue
+        key, _, value = line.partition("=")
+        out[key.strip()] = value.strip().strip('"').strip("'")
+    return out
+
+
+def _resolve_env(name: str, env_file_values: dict[str, str]) -> str | None:
+    return os.environ.get(name) or env_file_values.get(name)
+
+
+def _compute_chunks(config: dict[str, Any], right_sized: bool) -> list[RegionChunk]:
+    """Plan all Region API submissions for one seeding pass.
+
+    Splits each zoom level into N chunks across the lat axis so each
+    chunk fits within the Region API's sizeMeters cap (10000).
+    """
+
+    if right_sized:
+        bbox = config["actual_flight_extent"]
+    else:
+        bbox = config["bbox"]
+    chunks_per_zoom = config["chunking"]["chunks_per_zoom"]
+    size_meters = int(config["chunking"]["size_meters_per_chunk"])
+    zoom_levels = config["zoom_levels"]
+
+    if right_sized:
+        # The flight extent is < 1 km, one chunk per zoom is sufficient.
+        chunks_per_zoom = 1
+        size_meters = 1000
+
+    lat_centers: list[float]
+    if chunks_per_zoom == 1:
+        lat_centers = [(bbox["lat_min"] + bbox["lat_max"]) / 2.0]
+    else:
+        span = bbox["lat_max"] - bbox["lat_min"]
+        step = span / chunks_per_zoom
+        lat_centers = [bbox["lat_min"] + step * (i + 0.5) for i in range(chunks_per_zoom)]
+    center_lon = (bbox["lon_min"] + bbox["lon_max"]) / 2.0
+
+    chunks: list[RegionChunk] = []
+    for zoom in zoom_levels:
+        for idx, lat in enumerate(lat_centers):
+            label_suffix = f"chunk{idx}" if chunks_per_zoom > 1 else "single"
+            chunks.append(
+                RegionChunk(
+                    zoom=zoom,
+                    center_lat=lat,
+                    center_lon=center_lon,
+                    size_meters=size_meters,
+                    chunk_label=f"z{zoom}-{label_suffix}",
+                )
+            )
+    return chunks
+
+
+def _expected_tile_coords(config: dict[str, Any], right_sized: bool) -> list[tuple[int, int, int]]:
+    """Compute the slippy-map (z, x, y) tile coords covering the bbox.
+
+    Used by the inventory verification step.
+    """
+
+    if right_sized:
+        bbox = config["actual_flight_extent"]
+    else:
+        bbox = config["bbox"]
+    coords: list[tuple[int, int, int]] = []
+    for z in config["zoom_levels"]:
+        n = 2**z
+        x_min = int((bbox["lon_min"] + 180) / 360 * n)
+        x_max = int((bbox["lon_max"] + 180) / 360 * n)
+        y_min = int((1 - math.asinh(math.tan(math.radians(bbox["lat_max"]))) / math.pi) / 2 * n)
+        y_max = int((1 - math.asinh(math.tan(math.radians(bbox["lat_min"]))) / math.pi) / 2 * n)
+        for x in range(x_min, x_max + 1):
+            for y in range(y_min, y_max + 1):
+                coords.append((z, x, y))
+    return coords
+
+
+def _submit_region(
+    client: httpx.Client, sp_url: str, headers: dict[str, str], chunk: RegionChunk
+) -> tuple[bool, str]:
+    """Submit one Region API request. Returns (success, message)."""
+
+    body = {
+        "id": str(chunk.region_id),
+        "latitude": chunk.center_lat,
+        "longitude": chunk.center_lon,
+        "sizeMeters": chunk.size_meters,
+        "zoomLevel": chunk.zoom,
+        "stitchTiles": False,
+    }
+    try:
+        resp = client.post(
+            f"{sp_url}/api/satellite/request",
+            headers=headers,
+            json=body,
+            timeout=_REQUEST_TIMEOUT_S,
+        )
+    except httpx.HTTPError as exc:
+        return False, f"network error: {exc}"
+    if resp.status_code != 200:
+        return False, f"HTTP {resp.status_code}: {resp.text[:200]}"
+    try:
+        payload = resp.json()
+        chunk.submitted_status = payload.get("status")
+    except json.JSONDecodeError as exc:
+        return False, f"unexpected response body (not JSON): {exc}; raw={resp.text[:200]}"
+    return True, f"submitted; initial status={chunk.submitted_status}"
+
+
+def _poll_region(
+    client: httpx.Client, sp_url: str, headers: dict[str, str], chunk: RegionChunk
+) -> str:
+    """Poll one Region until terminal status. Updates chunk fields in-place.
+
+    Returns the final status string. Raises RuntimeError on timeout.
+    """
+
+    for attempt in range(1, _POLL_MAX_ATTEMPTS + 1):
+        try:
+            resp = client.get(
+                f"{sp_url}/api/satellite/region/{chunk.region_id}",
+                headers=headers,
+                timeout=_REQUEST_TIMEOUT_S,
+            )
+            resp.raise_for_status()
+            payload = resp.json()
+        except (httpx.HTTPError, json.JSONDecodeError) as exc:
+            sys.stderr.write(f"  [{chunk.chunk_label}] poll attempt {attempt} failed: {exc}\n")
+            time.sleep(_POLL_INTERVAL_S)
+            continue
+        status = (payload.get("status") or "").lower()
+        chunk.terminal_status = status
+        chunk.tiles_downloaded = payload.get("tilesDownloaded", 0)
+        chunk.tiles_reused = payload.get("tilesReused", 0)
+        chunk.csv_path = payload.get("csvFilePath")
+        chunk.summary_path = payload.get("summaryFilePath")
+        if status in _TERMINAL_STATUSES:
+            return status
+        if attempt % 6 == 0:  # every ~30s
+            sys.stderr.write(
+                f"  [{chunk.chunk_label}] still {status} (attempt {attempt}/{_POLL_MAX_ATTEMPTS})\n"
+            )
+        time.sleep(_POLL_INTERVAL_S)
+    raise RuntimeError(
+        f"region {chunk.region_id} ({chunk.chunk_label}) did not reach terminal "
+        f"status within {_POLL_MAX_ATTEMPTS * _POLL_INTERVAL_S:.0f}s"
+    )
+
+
+def _verify_inventory(
+    client: httpx.Client,
+    sp_url: str,
+    headers: dict[str, str],
+    expected_coords: list[tuple[int, int, int]],
+) -> tuple[int, int]:
+    """Query inventory for the expected tile coords. Returns (present, total)."""
+
+    BATCH_SIZE = 5000
+    total_present = 0
+    total = 0
+    for batch_start in range(0, len(expected_coords), BATCH_SIZE):
+        batch = expected_coords[batch_start : batch_start + BATCH_SIZE]
+        body = {"tiles": [{"z": z, "x": x, "y": y} for z, x, y in batch]}
+        try:
+            resp = client.post(
+                f"{sp_url}/api/satellite/tiles/inventory",
+                headers=headers,
+                json=body,
+                timeout=_REQUEST_TIMEOUT_S,
+            )
+            resp.raise_for_status()
+            payload = resp.json()
+        except (httpx.HTTPError, json.JSONDecodeError) as exc:
+            sys.stderr.write(f"inventory batch starting at {batch_start} failed: {exc}\n")
+            continue
+        results = payload.get("results", [])
+        total += len(results)
+        total_present += sum(1 for r in results if r.get("present"))
+    return total_present, total
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument(
+        "--bbox-config",
+        type=Path,
+        default=Path(__file__).parent / "bbox.yaml",
+        help="Path to bbox.yaml (default: alongside this script).",
+    )
+    parser.add_argument(
+        "--env-file",
+        type=Path,
+        default=Path(".env.test"),
+        help="Fallback env file (default: .env.test in CWD).",
+    )
+    parser.add_argument(
+        "--output-summary",
+        type=Path,
+        default=None,
+        help="Optional path to write a JSON summary of the seeding run.",
+    )
+    parser.add_argument(
+        "--dry-run",
+        action="store_true",
+        help="Plan + validate auth, but do not submit Region requests.",
+    )
+    parser.add_argument(
+        "--right-sized-flight",
+        action="store_true",
+        help=(
+            "Use the actual_flight_extent bbox (~1 km^2) instead of the full "
+            "AZ-777 spec bbox (~80 km^2). ~98%% fewer tiles, useful when only "
+            "the specific Derkachi clip needs coverage."
+        ),
+    )
+    parser.add_argument(
+        "--skip-poll",
+        action="store_true",
+        help="Submit all regions but do not poll; exit immediately after submission.",
+    )
+    parser.add_argument(
+        "--skip-inventory-verification",
+        action="store_true",
+        help="Skip the final inventory verification step.",
+    )
+    args = parser.parse_args()
+
+    if not args.bbox_config.is_file():
+        sys.stderr.write(f"ERROR: bbox config not found: {args.bbox_config}\n")
+        return 71
+    try:
+        config = yaml.safe_load(args.bbox_config.read_text("utf-8"))
+    except yaml.YAMLError as exc:
+        sys.stderr.write(f"ERROR: failed to parse {args.bbox_config}: {exc}\n")
+        return 71
+
+    env_file_values = _load_env_file(args.env_file)
+    sp_url = _resolve_env("SATELLITE_PROVIDER_URL", env_file_values)
+    jwt_token = _resolve_env("SATELLITE_PROVIDER_API_KEY", env_file_values)
+    tls_insecure = _resolve_env("SATELLITE_PROVIDER_TLS_INSECURE", env_file_values) == "1"
+
+    if not sp_url:
+        sys.stderr.write("ERROR: SATELLITE_PROVIDER_URL not set (env or .env.test).\n")
+        return 72
+    if not jwt_token:
+        sys.stderr.write(
+            "ERROR: SATELLITE_PROVIDER_API_KEY not set. Mint with:\n"
+            "  python scripts/mint_dev_jwt.py\n"
+        )
+        return 72
+
+    chunks = _compute_chunks(config, args.right_sized_flight)
+    expected_coords = _expected_tile_coords(config, args.right_sized_flight)
+
+    # Budget check — loud warning if over-budget per AZ-777 spec line 178.
+    avg_bytes = int(config["catalog_size_budget"]["estimated_avg_bytes_per_tile"])
+    budget_bytes = int(config["catalog_size_budget"]["max_bytes_db_side"])
+    estimated_total = len(expected_coords) * avg_bytes
+    over_budget = estimated_total > budget_bytes
+
+    print(
+        f"[plan] satellite-provider: {sp_url} (tls_insecure={tls_insecure})\n"
+        f"[plan] bbox mode: {'right-sized flight' if args.right_sized_flight else 'spec bbox (~80 km^2)'}\n"
+        f"[plan] zoom levels: {config['zoom_levels']}\n"
+        f"[plan] region chunks to submit: {len(chunks)}\n"
+        f"[plan] expected tile coverage: {len(expected_coords)} tiles\n"
+        f"[plan] estimated DB size: {estimated_total / 1_048_576:.1f} MB "
+        f"(budget: {budget_bytes / 1_048_576:.0f} MB)\n"
+        f"[plan] imagery source: {config['imagery_source']['provider']}/{config['imagery_source']['layer']}\n"
+        f"[plan] license: {config['license']['source']}\n"
+        f"[plan] attribution: {config['license']['attribution_text']}\n"
+    )
+    if over_budget:
+        overage_pct = (estimated_total - budget_bytes) / budget_bytes * 100
+        sys.stderr.write(
+            "WARNING: estimated DB size exceeds spec budget by "
+            f"~{overage_pct:.0f}%. Per AZ-777 line 178 you can:\n"
+            "  - drop a zoom level (edit bbox.yaml::zoom_levels)\n"
+            "  - reduce bbox (edit bbox.yaml::bbox)\n"
+            "  - use --right-sized-flight (tight to actual flight extent)\n"
+            "Continuing anyway. Use --dry-run to inspect without seeding.\n"
+        )
+
+    if args.dry_run:
+        print("[dry-run] would submit:")
+        for c in chunks:
+            print(
+                f"  {c.chunk_label}: id={c.region_id} "
+                f"lat={c.center_lat:.5f} lon={c.center_lon:.5f} "
+                f"size={c.size_meters} zoom={c.zoom}"
+            )
+        return 0
+
+    headers = {
+        "Authorization": f"Bearer {jwt_token}",
+        "Content-Type": "application/json",
+    }
+    client = httpx.Client(verify=not tls_insecure)
+    try:
+        # ----- Phase A: submit all regions upfront -----
+        print(f"\n[submit] sending {len(chunks)} region requests...")
+        submission_failures: list[tuple[RegionChunk, str]] = []
+        for c in chunks:
+            ok, msg = _submit_region(client, sp_url, headers, c)
+            print(f"  [{c.chunk_label}] {msg}")
+            if not ok:
+                submission_failures.append((c, msg))
+        if submission_failures:
+            sys.stderr.write(f"ERROR: {len(submission_failures)} submission(s) failed:\n")
+            for c, msg in submission_failures:
+                sys.stderr.write(f"  [{c.chunk_label}] {msg}\n")
+            return 74
+
+        if args.skip_poll:
+            print(
+                "\n[skip-poll] all submissions sent; "
+                "background processing continues asynchronously. "
+                f"Region IDs: {[str(c.region_id) for c in chunks]}"
+            )
+            return 0
+
+        # ----- Phase B: poll each region until terminal -----
+        print(f"\n[poll] waiting for {len(chunks)} regions to reach terminal status...")
+        poll_failures: list[RegionChunk] = []
+        for c in chunks:
+            try:
+                status = _poll_region(client, sp_url, headers, c)
+            except RuntimeError as exc:
+                sys.stderr.write(f"  [{c.chunk_label}] {exc}\n")
+                poll_failures.append(c)
+                continue
+            tiles = c.tiles_downloaded + c.tiles_reused
+            print(
+                f"  [{c.chunk_label}] terminal={status} tiles={tiles} "
+                f"(downloaded={c.tiles_downloaded} reused={c.tiles_reused})"
+            )
+            if status in _FAILURE_STATUSES:
+                poll_failures.append(c)
+        if poll_failures:
+            sys.stderr.write(f"ERROR: {len(poll_failures)} region(s) did not complete cleanly\n")
+            return 75
+
+        # ----- Phase C: verify inventory -----
+        if not args.skip_inventory_verification:
+            print(f"\n[inventory] verifying {len(expected_coords)} expected tile coords...")
+            present, queried = _verify_inventory(client, sp_url, headers, expected_coords)
+            print(
+                f"[inventory] present: {present}/{queried} "
+                f"({present / queried * 100:.1f}% coverage)"
+                if queried
+                else "[inventory] no tiles queried"
+            )
+            if queried and present < queried:
+                missing = queried - present
+                sys.stderr.write(
+                    f"WARNING: {missing} expected tile(s) not present in inventory. "
+                    "This may indicate partial region failures, edge-tile gaps, or "
+                    "Google Maps API timeouts. Re-run seed_region.py to fill gaps "
+                    "(producer dedups via UPSERT-on-coord, so retries are safe).\n"
+                )
+                if present / queried < 0.95:
+                    return 76
+    finally:
+        client.close()
+
+    # ----- Summary output -----
+    total_downloaded = sum(c.tiles_downloaded for c in chunks)
+    total_reused = sum(c.tiles_reused for c in chunks)
+    print(
+        f"\n[done] seeded {len(chunks)} regions: "
+        f"downloaded={total_downloaded} reused={total_reused}"
+    )
+
+    if args.output_summary:
+        summary = {
+            "sp_url": sp_url,
+            "bbox_mode": "right-sized" if args.right_sized_flight else "spec",
+            "imagery_source": config["imagery_source"],
+            "license": config["license"],
+            "chunks": [
+                {
+                    "label": c.chunk_label,
+                    "region_id": str(c.region_id),
+                    "zoom": c.zoom,
+                    "center_lat": c.center_lat,
+                    "center_lon": c.center_lon,
+                    "size_meters": c.size_meters,
+                    "terminal_status": c.terminal_status,
+                    "tiles_downloaded": c.tiles_downloaded,
+                    "tiles_reused": c.tiles_reused,
+                    "csv_path": c.csv_path,
+                    "summary_path": c.summary_path,
+                }
+                for c in chunks
+            ],
+            "totals": {
+                "regions": len(chunks),
+                "tiles_downloaded": total_downloaded,
+                "tiles_reused": total_reused,
+            },
+        }
+        args.output_summary.parent.mkdir(parents=True, exist_ok=True)
+        args.output_summary.write_text(json.dumps(summary, indent=2))
+        print(f"[done] summary written to {args.output_summary}")
+
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())
diff --git a/tests/unit/c11_tile_manager/test_tile_downloader.py b/tests/unit/c11_tile_manager/test_tile_downloader.py
index f1ad7c1..d8d768b 100644
--- a/tests/unit/c11_tile_manager/test_tile_downloader.py
+++ b/tests/unit/c11_tile_manager/test_tile_downloader.py
@@ -36,7 +36,6 @@ from gps_denied_onboard.components.c11_tile_manager import (
     request_hash,
 )
 
-
 _BASE_URL = "https://parent-suite.test"
 _INVENTORY_PATH = "/api/satellite/tiles/inventory"
 _TILES_PATH_PREFIX = "/tiles/"
@@ -111,14 +110,10 @@ class _StubTileWriter:
             }
         )
         if call_index in self.rejected_indices:
-            raise _StubFreshnessRejection(
-                f"freshness rejected call_index={call_index}"
-            )
+            raise _StubFreshnessRejection(f"freshness rejected call_index={call_index}")
         return self.labels_by_index.get(call_index, "fresh")
 
-    def tile_already_present(
-        self, *, zoom_level: int, lat: float, lon: float
-    ) -> bool:
+    def tile_already_present(self, *, zoom_level: int, lat: float, lon: float) -> bool:
         self.exists_calls.append((zoom_level, lat, lon))
         return False
 
@@ -238,9 +233,9 @@ def _inventory_entry_for_coord(
 ) -> dict[str, Any]:
     if not present:
         return {
-            "tileZoom": int(zoom),
-            "tileX": int(x),
-            "tileY": int(y),
+            "z": int(zoom),
+            "x": int(x),
+            "y": int(y),
             "locationHash": str(uuid4()),
             "present": False,
             "id": None,
@@ -251,9 +246,9 @@ def _inventory_entry_for_coord(
         }
     captured = captured_at or datetime(2026, 5, 13, 0, 0, 0, tzinfo=timezone.utc)
     return {
-        "tileZoom": int(zoom),
-        "tileX": int(x),
-        "tileY": int(y),
+        "z": int(zoom),
+        "x": int(x),
+        "y": int(y),
         "locationHash": str(uuid4()),
         "present": True,
         "id": str(uuid4()),
@@ -303,9 +298,9 @@ def _make_inventory_handler(
                     resolution = 0.5
                 results.append(
                     _inventory_entry_for_coord(
-                        zoom=int(t["tileZoom"]),
-                        x=int(t["tileX"]),
-                        y=int(t["tileY"]),
+                        zoom=int(t["z"]),
+                        x=int(t["x"]),
+                        y=int(t["y"]),
                         present=is_present,
                         resolution_m_per_px=resolution,
                     )
@@ -331,12 +326,8 @@ def _make_inventory_handler(
 def test_ac1_100_tile_happy_path_writes_all(tmp_path: Path) -> None:
     # Arrange — bbox at zoom 14 produces N coord candidates; the
     # stub marks the first 100 as `present=true` and the rest absent.
-    transport = httpx.MockTransport(
-        _make_inventory_handler(present_count=100)
-    )
-    (downloader, _logs, writer, enforcer, _sleeps) = _build_downloader(
-        transport=transport
-    )
+    transport = httpx.MockTransport(_make_inventory_handler(present_count=100))
+    (downloader, _logs, writer, enforcer, _sleeps) = _build_downloader(transport=transport)
     request = _make_request(cache_root=tmp_path)
 
     # Act
@@ -366,9 +357,7 @@ def test_ac2_resolution_gate_rejects_sub_spec_tiles(tmp_path: Path) -> None:
             resolution_override_for_first_n=(10, 0.3),
         )
     )
-    (downloader, log_records, writer, _enforcer, _sleeps) = _build_downloader(
-        transport=transport
-    )
+    (downloader, log_records, writer, _enforcer, _sleeps) = _build_downloader(transport=transport)
 
     # Act
     report = downloader.download_tiles_for_area(_make_request(cache_root=tmp_path))
@@ -377,7 +366,9 @@ def test_ac2_resolution_gate_rejects_sub_spec_tiles(tmp_path: Path) -> None:
     assert report.tiles_rejected_resolution == 10
     assert report.tiles_downloaded == 40
     assert len(writer.write_calls) == 40
-    res_warnings = [r for r in log_records if getattr(r, "kind", "") == "c11.download.resolution_rejected"]
+    res_warnings = [
+        r for r in log_records if getattr(r, "kind", "") == "c11.download.resolution_rejected"
+    ]
     assert len(res_warnings) == 10
 
 
@@ -402,7 +393,9 @@ def test_ac3_freshness_rejections_counted_and_run_continues(tmp_path: Path) -> N
     assert report.tiles_downloaded == 5
     assert report.outcome == DownloadOutcome.SUCCESS
     summary_warns = [
-        r for r in log_records if getattr(r, "kind", "") == "c11.download.freshness_rejected_summary"
+        r
+        for r in log_records
+        if getattr(r, "kind", "") == "c11.download.freshness_rejected_summary"
     ]
     assert len(summary_warns) == 1
 
@@ -483,9 +476,7 @@ def test_ac6_persistent_5xx_raises_satellite_provider_error(tmp_path: Path) -> N
             tile_response_factory=_factory,
         )
     )
-    (downloader, _logs, _writer, _enforcer, _sleeps) = _build_downloader(
-        transport=transport
-    )
+    (downloader, _logs, _writer, _enforcer, _sleeps) = _build_downloader(transport=transport)
 
     # Act / Assert
     with pytest.raises(SatelliteProviderError):
@@ -512,9 +503,7 @@ def test_ac7_401_fails_fast_no_retry(tmp_path: Path) -> None:
             tile_response_factory=_factory,
         )
     )
-    (downloader, log_records, _writer, _enforcer, _sleeps) = _build_downloader(
-        transport=transport
-    )
+    (downloader, _log_records, _writer, _enforcer, _sleeps) = _build_downloader(transport=transport)
 
     # Act / Assert
     with pytest.raises(SatelliteProviderError):
@@ -541,9 +530,7 @@ def test_ac8_idempotent_rerun_yields_no_op(tmp_path: Path) -> None:
             tile_response_factory=_factory,
         )
     )
-    (downloader, _logs, _writer, _enforcer, _sleeps) = _build_downloader(
-        transport=transport
-    )
+    (downloader, _logs, _writer, _enforcer, _sleeps) = _build_downloader(transport=transport)
     request = _make_request(cache_root=tmp_path)
 
     # Act — first run
@@ -578,10 +565,8 @@ def test_ac9_cache_budget_pre_check_aborts(tmp_path: Path) -> None:
             tile_response_factory=_factory,
         )
     )
-    enforcer = _StubBudgetEnforcer(
-        raise_on_call=CacheBudgetExceededError("no headroom")
-    )
-    (downloader, log_records, _writer, _enforcer, _sleeps) = _build_downloader(
+    enforcer = _StubBudgetEnforcer(raise_on_call=CacheBudgetExceededError("no headroom"))
+    (downloader, _log_records, _writer, _enforcer, _sleeps) = _build_downloader(
         transport=transport, budget_enforcer=enforcer
     )
 
@@ -606,16 +591,12 @@ def test_ac11_service_api_key_never_appears_in_logs(tmp_path: Path) -> None:
             inventory_response_override=httpx.Response(401),
         )
     )
-    (downloader, log_records, _writer, _enforcer, _sleeps) = _build_downloader(
-        transport=transport
-    )
+    (downloader, log_records, _writer, _enforcer, _sleeps) = _build_downloader(transport=transport)
     with pytest.raises(SatelliteProviderError):
         downloader.download_tiles_for_area(_make_request(cache_root=tmp_path))
 
     # Assert
-    flat = " ".join(
-        r.getMessage() + json.dumps(getattr(r, "kv", {})) for r in log_records
-    )
+    flat = " ".join(r.getMessage() + json.dumps(getattr(r, "kv", {})) for r in log_records)
     assert _API_KEY not in flat
     assert "Bearer ***" in flat
 
@@ -642,9 +623,7 @@ def test_ac12_partial_journal_resumed_on_rerun(tmp_path: Path) -> None:
             tile_response_factory=_factory,
         )
     )
-    (downloader, _logs, writer, _enforcer, _sleeps) = _build_downloader(
-        transport=transport
-    )
+    (downloader, _logs, writer, _enforcer, _sleeps) = _build_downloader(transport=transport)
     request = _make_request(cache_root=tmp_path)
 
     # First run — completes
@@ -771,14 +750,10 @@ def test_nfr_throughput_1000_tiles_under_budget(tmp_path: Path) -> None:
     transport = httpx.MockTransport(
         _make_inventory_handler(
             present_count=1000,
-            tile_response_factory=lambda r: httpx.Response(
-                200, content=b"\xff\xd8tile"
-            ),
+            tile_response_factory=lambda r: httpx.Response(200, content=b"\xff\xd8tile"),
         )
     )
-    (downloader, _logs, _writer, _enforcer, _sleeps) = _build_downloader(
-        transport=transport
-    )
+    (downloader, _logs, _writer, _enforcer, _sleeps) = _build_downloader(transport=transport)
 
     # Big bbox at zoom 14: ~ 32x32 tile span on this latitude is enough.
     # 1° ≈ 45 tiles at zoom 14 in latitude → 0.75° gives ≈ 33 tiles → ~1089 tiles.