Removed value: -[
-  {
-    "type": "number"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "number",
+  "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": [
+      "terminals",
+      "totalCount",
+      "nextOffset",
+      "hasMore"
+    ]
+  },
+  {
+    "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: `api_unavailable`: WSF Ferry API is unreachable or returns a non-2xx response after retries. `invalid_access_code`: WSF rejected the request because WSDOT_ACCESS_CODE is missing, invalid, or not registered. Other values are possible when a failure originates below the handler.",
+          "examples": [
+            "api_unavailable",
+            "invalid_access_code"
+          ],
+          "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: -[
-  "terminals",
-  "totalCount",
-  "nextOffset",
-  "hasMore"
-]

Added value: +{
+  "description": "Maximum terminals to return in this page (1–20). Defaults to 5. Counts terminals, not sailings.",
+  "maximum": 20,
+  "minimum": 1,
+  "type": "integer"
+}

Added value: +{
+  "description": "Zero-based index of the first terminal to return, for paging. Defaults to 0.",
+  "maximum": 9007199254740991,
+  "minimum": 0,
+  "type": "integer"
+}

Added value: +{
+  "description": "True when more terminals remain beyond the current page.",
+  "type": "boolean"
+}

Added value: +{
+  "anyOf": [
+    {
+      "type": "number"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Offset to pass to retrieve the next page, or null when this is the last page."
+}

Previous value: -"Optional guidance when no terminal space data is available or the filter matched nothing. Absent on normal results."New value: +"Informational note about the page window, or guidance when no terminal space data is available, the filter matched nothing, or the offset ran past the end."

Previous value: -"Number of terminals returned."New value: +"Total terminals matching the filter across all pages (not just this page). Counts terminals, not sailings."

Previous value: -[
-  "terminals",
-  "totalCount"
-]New value: +[
+  "terminals",
+  "totalCount",
+  "nextOffset",
+  "hasMore"
+]

Added value: +{
+  "description": "Numeric IDs of the terminals this sailing serves — the destinations. Pass one to wsdot_get_ferry_schedule as arrivingTerminalId, or resolve names with wsdot_get_ferry_terminals.",
+  "items": {
+    "type": "number"
+  },
+  "type": "array"
+}

Removed value: -{
-  "description": "Destination terminal name.",
-  "type": "string"
-}

Added value: +{
+  "description": "Whether WSF publishes a drive-up count for this sailing. False means driveUpSpaceCount is not reported, not that the lane is empty.",
+  "type": "boolean"
+}

Added value: +{
+  "description": "Whether this sailing takes vehicle reservations. False means reservableSpaceCount does not apply.",
+  "type": "boolean"
+}

Previous value: -"Available drive-up vehicle spaces. Zero means full."New value: +"Available drive-up vehicle spaces. Zero means full — oversubscribed sailings report a negative count upstream and are floored to zero here, so this value is never negative."

Added value: +{
+  "description": "Upstream itinerary string for the sailing, e.g. \"Anacortes -> Friday Harbor\". A display label only — it may name the departing terminal or several stops, so do not read it as the destination.",
+  "type": "string"
+}

Previous value: -"Available reservable vehicle spaces."New value: +"Available reservable vehicle spaces, floored at zero like driveUpSpaceCount. Zero means no reservable space remains."

Added value: +{
+  "description": "Optional guidance when no terminal space data is available or the filter matched nothing. Absent on normal results.",
+  "type": "string"
+}

Added value: +{
+  "description": "The terminal ID filter applied, or absent if no filter was used.",
+  "type": "number"
+}