Previous value: -"Time the aurora forecast is valid for, ISO 8601."New value: +"ISO 8601 time the forecast is valid for."

Previous value: -"Total number of grid points in the OVATION model."New value: +"OVATION grid point count."

Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "auroraPercent": {
-        "description": "Aurora probability at the nearest grid point (0–100%).",
-        "type": "number"
-      },
-      "darkness": {
-        "description": "Sky darkness at the requested coordinates at forecastTime, from sunElevationDeg: day at 0° and above, civil_twilight from −6° up to 0°, nautical_twilight from −12° up to −6°, dark below −12°.",
-        "enum": [
-          "day",
-          "civil_twilight",
-          "nautical_twilight",
-          "dark"
-        ],
-        "type": "string"
-      },
-      "geomagneticLatitude": {
-        "description": "Centered-dipole geomagnetic latitude the requested coordinates convert to (degrees, −90 to 90). Aurora bands are geomagnetic, so this — not the geographic latitude — is what minKpRequired and the verdict are derived from. It can differ from the geographic latitude by up to ±9.2° in either direction.",
-        "type": "number"
-      },
-      "gridLatitude": {
-        "description": "Nearest OVATION grid latitude.",
-        "type": "number"
-      },
-      "gridLongitude": {
-        "description": "Nearest OVATION grid longitude.",
-        "type": "number"
-      },
-      "horizonDistanceKm": {
-        "description": "Great-circle distance from the requested point to the cell carrying horizonMaxPercent, in km. Null when horizonMaxPercent is null.",
-        "type": [
-          "number",
-          "null"
-        ]
-      },
-      "horizonMaxLatitude": {
-        "description": "Grid latitude of the cell carrying horizonMaxPercent (degrees); the nearest such cell when several tie. Null when horizonMaxPercent is null.",
-        "type": [
-          "number",
-          "null"
-        ]
-      },
-      "horizonMaxPercent": {
-        "description": "Highest aurora probability (0–100%) among grid cells poleward of gridLatitude, within ±2° longitude and 1000 km of the requested point. Null when no grid cell lies in that window, which on the full grid happens only when gridLatitude is ±90.",
-        "type": [
-          "number",
-          "null"
-        ]
-      },
-      "minGScale": {
-        "description": "NOAA G level matching minKpRequired (1–5), 0 inside the quiet-time auroral oval where no storm is needed, and null below 40° geomagnetic where no storm level reaches.",
-        "type": [
-          "number",
-          "null"
-        ]
-      },
-      "minKpRequired": {
-        "description": "Minimum Kp for aurora at this geomagnetic latitude — the floor of the band, in SWPC thirds (4.67, 5.67, 6.67, 7.67, 9.00), or 0 inside the quiet-time auroral oval above 65°. Reported as 9 where no storm level reaches, which minGScale=null distinguishes from a genuine G5 threshold. The 60° G1 band is this server’s interpolation between the oval edge and NOAA’s G2 figure; the rest are the NOAA scales page figures.",
-        "type": "number"
-      },
-      "requestedLatitude": {
-        "description": "Geographic latitude supplied in the request (degrees, −90 to 90).",
-        "type": "number"
-      },
-      "requestedLongitude": {
-        "description": "Geographic longitude supplied in the request (degrees, −180 to 180).",
-        "type": "number"
-      },
-      "sunElevationDeg": {
-        "description": "Geometric solar elevation at the requested coordinates at forecastTime, in degrees (−90 to 90, rounded to 0.1°, no refraction correction). Negative when the sun is below the horizon.",
-        "type": "number"
-      },
-      "verdict": {
-        "description": "Plain-language visibility verdict for the requested coordinates at forecastTime, e.g. \"Good aurora chance (42%) — Kp≥6.67 (G3) needed at 51.2° geomagnetic.\" Opens \"Not visible — daylight\" when darkness is day.",
-        "type": "string"
-      }
-    },
-    "required": [
-      "requestedLatitude",
-      "requestedLongitude",
-      "geomagneticLatitude",
-      "gridLatitude",
-      "gridLongitude",
-      "auroraPercent",
-      "minKpRequired",
-      "minGScale",
-      "sunElevationDeg",
-      "darkness",
-      "horizonMaxPercent",
-      "horizonMaxLatitude",
-      "horizonDistanceKm",
-      "verdict"
-    ],
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "properties": {
+      "auroraPercent": {
+        "description": "Aurora probability at the nearest grid point (0–100%).",
+        "type": "number"
+      },
+      "darkness": {
+        "description": "Sky state from sunElevationDeg: day ≥ 0°, civil_twilight ≥ −6°, nautical_twilight ≥ −12°, dark below.",
+        "enum": [
+          "day",
+          "civil_twilight",
+          "nautical_twilight",
+          "dark"
+        ],
+        "type": "string"
+      },
+      "geomagneticLatitude": {
+        "description": "Geomagnetic latitude of the request, in degrees (up to ±9.2° from geographic); minKpRequired and the verdict use it.",
+        "type": "number"
+      },
+      "gridLatitude": {
+        "description": "Nearest grid latitude, in degrees.",
+        "type": "number"
+      },
+      "gridLongitude": {
+        "description": "Nearest grid longitude, in degrees.",
+        "type": "number"
+      },
+      "horizonDistanceKm": {
+        "description": "Distance in km to the horizonMaxPercent cell; null when it is null.",
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "horizonMaxLatitude": {
+        "description": "Grid latitude of horizonMaxPercent, in degrees (nearest on a tie); null when it is null.",
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "horizonMaxPercent": {
+        "description": "Highest aurora probability (0–100%) poleward of gridLatitude within ±2° longitude and 1000 km; null when no cell qualifies (gridLatitude ±90).",
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "minGScale": {
+        "description": "G level for minKpRequired (1–5); 0 inside the quiet-time oval; null below 40° geomagnetic, where no storm reaches.",
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "minKpRequired": {
+        "description": "Minimum Kp for aurora here: 4.67, 5.67, 6.67, 7.67, or 9; 0 inside the quiet-time oval (above 65°). Also 9 where no storm reaches (minGScale null).",
+        "type": "number"
+      },
+      "requestedLatitude": {
+        "description": "Requested geographic latitude, in degrees.",
+        "type": "number"
+      },
+      "requestedLongitude": {
+        "description": "Requested geographic longitude, in degrees.",
+        "type": "number"
+      },
+      "sunElevationDeg": {
+        "description": "Solar elevation here at forecastTime, in degrees to 0.1° (no refraction); negative below the horizon.",
+        "type": "number"
+      },
+      "verdict": {
+        "description": "Visibility verdict, e.g. \"Good aurora chance (42%) — Kp≥6.67 (G3) needed at 51.2° geomagnetic.\"; opens \"Not visible — daylight\" when darkness is day.",
+        "type": "string"
+      }
+    },
+    "required": [
+      "requestedLatitude",
+      "requestedLongitude",
+      "geomagneticLatitude",
+      "gridLatitude",
+      "gridLongitude",
+      "auroraPercent",
+      "minKpRequired",
+      "minGScale",
+      "sunElevationDeg",
+      "darkness",
+      "horizonMaxPercent",
+      "horizonMaxLatitude",
+      "horizonDistanceKm",
+      "verdict"
+    ],
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]

Previous value: -"Local aurora lookup result. Null when no coordinates were provided."New value: +"Coordinate lookup; null when no coordinates were given."

Previous value: -"Time of the OVATION model observation, ISO 8601."New value: +"ISO 8601 OVATION observation time."

Previous value: -"Highest aurora probability anywhere on the globe (0–100)."New value: +"Highest aurora probability on the globe (0–100%)."

Previous value: -"Approximate region of the highest aurora probability grid point."New value: +"Location of the highest grid point, e.g. \"67°N, 20°W\"; \"Unknown\" when every cell is 0%."

Previous value: -"Machine-readable failure mode. Declared by this tool: `feed_unavailable`: SWPC feed returns 5xx or 429, times out, or answers with a body that is not parseable JSON. Retried before failing. `feed_moved`: SWPC feed path returns a permanent 4xx (404, 410, 401, 403), or a coordinate lookup finds no parseable Forecast Time in the feed. Fails in one attempt. `invalid_coordinates`: One coordinate provided without the other. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `feed_unavailable`: SWPC feed returns 5xx or 429, times out, or answers with a body that is not parseable JSON. Retried for up to 45 seconds in total before failing. `feed_moved`: SWPC feed path returns a permanent 4xx (404, 410, 401, 403), or a coordinate lookup finds no parseable Forecast Time in the feed. Fails in one attempt. `invalid_coordinates`: One coordinate provided without the other. Other values are possible when a failure originates below the handler."

Previous value: -"Machine-readable failure mode. Declared by this tool: `feed_unavailable`: SWPC feed returns 5xx or 429, times out, or answers with a body that is not parseable JSON. Retried before failing. `feed_moved`: SWPC feed path returns a permanent 4xx (404, 410, 401, 403). Fails in one attempt. `invalid_coordinates`: One coordinate provided without the other. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `feed_unavailable`: SWPC feed returns 5xx or 429, times out, or answers with a body that is not parseable JSON. Retried before failing. `feed_moved`: SWPC feed path returns a permanent 4xx (404, 410, 401, 403), or a coordinate lookup finds no parseable Forecast Time in the feed. Fails in one attempt. `invalid_coordinates`: One coordinate provided without the other. Other values are possible when a failure originates below the handler."

Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "auroraPercent": {
-        "description": "Aurora probability at the nearest grid point (0–100%).",
-        "type": "number"
-      },
-      "geomagneticLatitude": {
-        "description": "Centered-dipole geomagnetic latitude the requested coordinates convert to (degrees, −90 to 90). Aurora bands are geomagnetic, so this — not the geographic latitude — is what minKpRequired and the verdict are derived from. It can differ from the geographic latitude by up to ±9.2° in either direction.",
-        "type": "number"
-      },
-      "gridLatitude": {
-        "description": "Nearest OVATION grid latitude.",
-        "type": "number"
-      },
-      "gridLongitude": {
-        "description": "Nearest OVATION grid longitude.",
-        "type": "number"
-      },
-      "minGScale": {
-        "description": "NOAA G level matching minKpRequired (1–5), 0 inside the quiet-time auroral oval where no storm is needed, and null below 40° geomagnetic where no storm level reaches.",
-        "type": [
-          "number",
-          "null"
-        ]
-      },
-      "minKpRequired": {
-        "description": "Minimum Kp for aurora at this geomagnetic latitude — the floor of the band, in SWPC thirds (4.67, 5.67, 6.67, 7.67, 9.00), or 0 inside the quiet-time auroral oval above 65°. Reported as 9 where no storm level reaches, which minGScale=null distinguishes from a genuine G5 threshold. The 60° G1 band is this server’s interpolation between the oval edge and NOAA’s G2 figure; the rest are the NOAA scales page figures.",
-        "type": "number"
-      },
-      "requestedLatitude": {
-        "description": "Geographic latitude supplied in the request (degrees, −90 to 90).",
-        "type": "number"
-      },
-      "requestedLongitude": {
-        "description": "Geographic longitude supplied in the request (degrees, −180 to 180).",
-        "type": "number"
-      },
-      "verdict": {
-        "description": "Plain-language visibility verdict at this geomagnetic latitude, e.g. \"Good aurora chance (42%) — Kp≥6.67 (G3) needed at 51.2° geomagnetic latitude.\"",
-        "type": "string"
-      }
-    },
-    "required": [
-      "requestedLatitude",
-      "requestedLongitude",
-      "geomagneticLatitude",
-      "gridLatitude",
-      "gridLongitude",
-      "auroraPercent",
-      "minKpRequired",
-      "minGScale",
-      "verdict"
-    ],
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "properties": {
+      "auroraPercent": {
+        "description": "Aurora probability at the nearest grid point (0–100%).",
+        "type": "number"
+      },
+      "darkness": {
+        "description": "Sky darkness at the requested coordinates at forecastTime, from sunElevationDeg: day at 0° and above, civil_twilight from −6° up to 0°, nautical_twilight from −12° up to −6°, dark below −12°.",
+        "enum": [
+          "day",
+          "civil_twilight",
+          "nautical_twilight",
+          "dark"
+        ],
+        "type": "string"
+      },
+      "geomagneticLatitude": {
+        "description": "Centered-dipole geomagnetic latitude the requested coordinates convert to (degrees, −90 to 90). Aurora bands are geomagnetic, so this — not the geographic latitude — is what minKpRequired and the verdict are derived from. It can differ from the geographic latitude by up to ±9.2° in either direction.",
+        "type": "number"
+      },
+      "gridLatitude": {
+        "description": "Nearest OVATION grid latitude.",
+        "type": "number"
+      },
+      "gridLongitude": {
+        "description": "Nearest OVATION grid longitude.",
+        "type": "number"
+      },
+      "horizonDistanceKm": {
+        "description": "Great-circle distance from the requested point to the cell carrying horizonMaxPercent, in km. Null when horizonMaxPercent is null.",
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "horizonMaxLatitude": {
+        "description": "Grid latitude of the cell carrying horizonMaxPercent (degrees); the nearest such cell when several tie. Null when horizonMaxPercent is null.",
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "horizonMaxPercent": {
+        "description": "Highest aurora probability (0–100%) among grid cells poleward of gridLatitude, within ±2° longitude and 1000 km of the requested point. Null when no grid cell lies in that window, which on the full grid happens only when gridLatitude is ±90.",
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "minGScale": {
+        "description": "NOAA G level matching minKpRequired (1–5), 0 inside the quiet-time auroral oval where no storm is needed, and null below 40° geomagnetic where no storm level reaches.",
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "minKpRequired": {
+        "description": "Minimum Kp for aurora at this geomagnetic latitude — the floor of the band, in SWPC thirds (4.67, 5.67, 6.67, 7.67, 9.00), or 0 inside the quiet-time auroral oval above 65°. Reported as 9 where no storm level reaches, which minGScale=null distinguishes from a genuine G5 threshold. The 60° G1 band is this server’s interpolation between the oval edge and NOAA’s G2 figure; the rest are the NOAA scales page figures.",
+        "type": "number"
+      },
+      "requestedLatitude": {
+        "description": "Geographic latitude supplied in the request (degrees, −90 to 90).",
+        "type": "number"
+      },
+      "requestedLongitude": {
+        "description": "Geographic longitude supplied in the request (degrees, −180 to 180).",
+        "type": "number"
+      },
+      "sunElevationDeg": {
+        "description": "Geometric solar elevation at the requested coordinates at forecastTime, in degrees (−90 to 90, rounded to 0.1°, no refraction correction). Negative when the sun is below the horizon.",
+        "type": "number"
+      },
+      "verdict": {
+        "description": "Plain-language visibility verdict for the requested coordinates at forecastTime, e.g. \"Good aurora chance (42%) — Kp≥6.67 (G3) needed at 51.2° geomagnetic.\" Opens \"Not visible — daylight\" when darkness is day.",
+        "type": "string"
+      }
+    },
+    "required": [
+      "requestedLatitude",
+      "requestedLongitude",
+      "geomagneticLatitude",
+      "gridLatitude",
+      "gridLongitude",
+      "auroraPercent",
+      "minKpRequired",
+      "minGScale",
+      "sunElevationDeg",
+      "darkness",
+      "horizonMaxPercent",
+      "horizonMaxLatitude",
+      "horizonDistanceKm",
+      "verdict"
+    ],
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]

Previous value: -"Machine-readable failure mode. Declared by this tool: `feed_unavailable`: SWPC endpoint returns non-OK status or times out after retries. `invalid_coordinates`: One coordinate provided without the other. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `feed_unavailable`: SWPC feed returns 5xx or 429, times out, or answers with a body that is not parseable JSON. Retried before failing. `feed_moved`: SWPC feed path returns a permanent 4xx (404, 410, 401, 403). Fails in one attempt. `invalid_coordinates`: One coordinate provided without the other. Other values are possible when a failure originates below the handler."

Previous value: -[
-  "feed_unavailable",
-  "invalid_coordinates"
-]New value: +[
+  "feed_unavailable",
+  "feed_moved",
+  "invalid_coordinates"
+]

Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "auroraPercent": {
-        "description": "Aurora probability at the nearest grid point (0–100%).",
-        "type": "number"
-      },
-      "gridLatitude": {
-        "description": "Nearest OVATION grid latitude.",
-        "type": "number"
-      },
-      "gridLongitude": {
-        "description": "Nearest OVATION grid longitude.",
-        "type": "number"
-      },
-      "minKpRequired": {
-        "description": "Minimum Kp threshold for aurora visibility at this latitude.",
-        "type": "number"
-      },
-      "requestedLatitude": {
-        "description": "Geographic latitude supplied in the request (degrees, −90 to 90).",
-        "type": "number"
-      },
-      "requestedLongitude": {
-        "description": "Geographic longitude supplied in the request (degrees, −180 to 180).",
-        "type": "number"
-      },
-      "verdict": {
-        "description": "Plain-language visibility verdict, e.g. \"Good aurora chance (42%) — Kp≥6 needed at this latitude.\"",
-        "type": "string"
-      }
-    },
-    "required": [
-      "requestedLatitude",
-      "requestedLongitude",
-      "gridLatitude",
-      "gridLongitude",
-      "auroraPercent",
-      "minKpRequired",
-      "verdict"
-    ],
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "properties": {
+      "auroraPercent": {
+        "description": "Aurora probability at the nearest grid point (0–100%).",
+        "type": "number"
+      },
+      "geomagneticLatitude": {
+        "description": "Centered-dipole geomagnetic latitude the requested coordinates convert to (degrees, −90 to 90). Aurora bands are geomagnetic, so this — not the geographic latitude — is what minKpRequired and the verdict are derived from. It can differ from the geographic latitude by up to ±9.2° in either direction.",
+        "type": "number"
+      },
+      "gridLatitude": {
+        "description": "Nearest OVATION grid latitude.",
+        "type": "number"
+      },
+      "gridLongitude": {
+        "description": "Nearest OVATION grid longitude.",
+        "type": "number"
+      },
+      "minGScale": {
+        "description": "NOAA G level matching minKpRequired (1–5), 0 inside the quiet-time auroral oval where no storm is needed, and null below 40° geomagnetic where no storm level reaches.",
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "minKpRequired": {
+        "description": "Minimum Kp for aurora at this geomagnetic latitude — the floor of the band, in SWPC thirds (4.67, 5.67, 6.67, 7.67, 9.00), or 0 inside the quiet-time auroral oval above 65°. Reported as 9 where no storm level reaches, which minGScale=null distinguishes from a genuine G5 threshold. The 60° G1 band is this server’s interpolation between the oval edge and NOAA’s G2 figure; the rest are the NOAA scales page figures.",
+        "type": "number"
+      },
+      "requestedLatitude": {
+        "description": "Geographic latitude supplied in the request (degrees, −90 to 90).",
+        "type": "number"
+      },
+      "requestedLongitude": {
+        "description": "Geographic longitude supplied in the request (degrees, −180 to 180).",
+        "type": "number"
+      },
+      "verdict": {
+        "description": "Plain-language visibility verdict at this geomagnetic latitude, e.g. \"Good aurora chance (42%) — Kp≥6.67 (G3) needed at 51.2° geomagnetic latitude.\"",
+        "type": "string"
+      }
+    },
+    "required": [
+      "requestedLatitude",
+      "requestedLongitude",
+      "geomagneticLatitude",
+      "gridLatitude",
+      "gridLongitude",
+      "auroraPercent",
+      "minKpRequired",
+      "minGScale",
+      "verdict"
+    ],
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +false

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "observationTime",
+      "forecastTime",
+      "localLookup",
+      "gridPointCount",
+      "topAuroraPercent",
+      "topAuroraRegion"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "additionalProperties": {},
+  "description": "Present when the call failed. Absent on success.",
+  "properties": {
+    "code": {
+      "description": "JSON-RPC error code for this failure.",
+      "maximum": 9007199254740991,
+      "minimum": -9007199254740991,
+      "type": "integer"
+    },
+    "data": {
+      "additionalProperties": {},
+      "properties": {
+        "reason": {
+          "description": "Machine-readable failure mode. Declared by this tool: `feed_unavailable`: SWPC endpoint returns non-OK status or times out after retries. `invalid_coordinates`: One coordinate provided without the other. Other values are possible when a failure originates below the handler.",
+          "examples": [
+            "feed_unavailable",
+            "invalid_coordinates"
+          ],
+          "type": "string"
+        },
+        "recovery": {
+          "additionalProperties": {},
+          "description": "Actionable next step for the caller.",
+          "properties": {
+            "hint": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "hint"
+          ],
+          "type": "object"
+        },
+        "retryable": {
+          "description": "Whether retrying may succeed.",
+          "type": "boolean"
+        }
+      },
+      "type": "object"
+    },
+    "message": {
+      "description": "Human-readable description of what went wrong.",
+      "type": "string"
+    }
+  },
+  "required": [
+    "code",
+    "message"
+  ],
+  "type": "object"
+}

Removed value: -[
-  "observationTime",
-  "forecastTime",
-  "localLookup",
-  "gridPointCount",
-  "topAuroraPercent",
-  "topAuroraRegion"
-]