Previous value: -"Last date, YYYY-MM-DD, inclusive. Defaults to startDate. At most 62 days after startDate."New value: +"Last date, YYYY-MM-DD, inclusive. Defaults to startDate. The range covers at most 62 days, counting both ends."

Previous value: -"PermitSnag's recorded checks of one permit or campground on the asked dates, each with its age. Not a live look at the booking site. Or found: false, or past: true."New value: +"PermitSnag's recorded checks of one permit or campground on the asked dates; an observed or stale date carries the time and age of its check. Not a live look at the booking site. Or found: false, or past: true."

Previous value: -"When the check behind an observed or stale state was made, ISO 8601."New value: +"The time of the check behind an observed or stale state (for an opening, when it was last seen), ISO 8601. For a permit, never later than publicDelayMinutes ago."

Previous value: -"What PermitSnag recorded for this date. unknown is never sold out."New value: +"What PermitSnag recorded for this date. Neither stale nor unknown means sold out."

Previous value: -"A check older than this is reported as stale."New value: +"Hours. A check older than this is never reported as observed; it is reported as stale (or as unknown, when partialScope hides a check that saw no opening)."

Previous value: -nullNew value: +{
+  "additionalProperties": false,
+  "anyOf": [
+    {
+      "required": [
+        "subject",
+        "depth",
+        "dates",
+        "staleAfterHours",
+        "freshness",
+        "days",
+        "alert",
+        "source",
+        "checkedAt"
+      ]
+    },
+    {
+      "required": [
+        "found"
+      ]
+    },
+    {
+      "required": [
+        "past"
+      ]
+    }
+  ],
+  "description": "PermitSnag's recorded checks of one permit or campground on the asked dates, each with its age. Not a live look at the booking site. Or found: false, or past: true.",
+  "properties": {
+    "alert": {
+      "additionalProperties": false,
+      "properties": {
+        "available": {
+          "description": "True only when PermitSnag can send an alert for this place right now.",
+          "type": "boolean"
+        },
+        "pageUrl": {
+          "description": "The PermitSnag page where an alert is set up, or where to read what to do instead.",
+          "type": "string"
+        },
+        "reason": {
+          "description": "Why an alert is or is not on offer.",
+          "enum": [
+            "eligible",
+            "lottery_period",
+            "out_of_season",
+            "closed",
+            "no_quota_now",
+            "lottery_draw_only",
+            "not_sold_online",
+            "not_tracked"
+          ]
+        }
+      },
+      "required": [
+        "available",
+        "reason",
+        "pageUrl"
+      ],
+      "type": "object"
+    },
+    "checkedAt": {
+      "type": "string"
+    },
+    "dates": {
+      "additionalProperties": false,
+      "properties": {
+        "calendar": {
+          "const": "local_day"
+        },
+        "end": {
+          "type": "string"
+        },
+        "start": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "start",
+        "end",
+        "calendar"
+      ],
+      "type": "object"
+    },
+    "days": {
+      "items": {
+        "additionalProperties": false,
+        "properties": {
+          "ageMinutes": {
+            "description": "Minutes since that check.",
+            "type": "integer"
+          },
+          "date": {
+            "description": "YYYY-MM-DD, the place's own local calendar day.",
+            "type": "string"
+          },
+          "lastSeenState": {
+            "description": "For a stale date: what that old check saw.",
+            "enum": [
+              "observed_opening",
+              "observed_no_match"
+            ]
+          },
+          "observedAt": {
+            "description": "When the check behind an observed or stale state was made, ISO 8601.",
+            "type": "string"
+          },
+          "openSites": {
+            "description": "Campgrounds at site level only: sites seen open.",
+            "type": "integer"
+          },
+          "releaseKind": {
+            "enum": [
+              "lottery",
+              "reservations",
+              null
+            ]
+          },
+          "releasesOn": {
+            "description": "For an unreleased date: the sourced day it goes on sale, when known.",
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "state": {
+            "description": "What PermitSnag recorded for this date. unknown is never sold out.",
+            "enum": [
+              "observed_opening",
+              "observed_no_match",
+              "stale",
+              "unknown",
+              "unreleased",
+              "off_season",
+              "closed",
+              "unsupported"
+            ]
+          }
+        },
+        "required": [
+          "date",
+          "state"
+        ],
+        "type": "object"
+      },
+      "maxItems": 62,
+      "type": "array"
+    },
+    "depth": {
+      "enum": [
+        "permit_level",
+        "site_level",
+        "campground_level"
+      ]
+    },
+    "found": {
+      "const": false,
+      "description": "Present, and false, only when nothing matched."
+    },
+    "freshness": {
+      "additionalProperties": false,
+      "properties": {
+        "band": {
+          "enum": [
+            "none",
+            "recent",
+            "stale"
+          ]
+        },
+        "newestObservedAt": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "oldestObservedAt": {
+          "type": [
+            "string",
+            "null"
+          ]
+        }
+      },
+      "required": [
+        "band",
+        "newestObservedAt",
+        "oldestObservedAt"
+      ],
+      "type": "object"
+    },
+    "partialScope": {
+      "description": "Permits only: true when our checks may cover only some zones or entry points, so no date is called \"no opening\".",
+      "type": "boolean"
+    },
+    "past": {
+      "const": true,
+      "description": "Present only when every asked date has passed."
+    },
+    "publicDelayMinutes": {
+      "description": "Permits only: dates are described as they stood this many minutes ago.",
+      "type": "number"
+    },
+    "scanRoute": {
+      "description": "How PermitSnag reaches this permit for cancellation openings: direct, through a zone or starting area, through its entry points, or none.",
+      "enum": [
+        "direct",
+        "via_zone",
+        "via_children",
+        "none",
+        null
+      ]
+    },
+    "source": {
+      "const": "permitsnag_recorded_checks"
+    },
+    "staleAfterHours": {
+      "description": "A check older than this is reported as stale.",
+      "type": "number"
+    },
+    "subject": {
+      "additionalProperties": false,
+      "properties": {
+        "id": {
+          "type": "string"
+        },
+        "kind": {
+          "enum": [
+            "permit",
+            "campground"
+          ]
+        },
+        "name": {
+          "type": "string"
+        },
+        "pageUrl": {
+          "type": "string"
+        },
+        "slug": {
+          "description": "Permits only.",
+          "type": "string"
+        }
+      },
+      "required": [
+        "kind",
+        "id",
+        "name",
+        "pageUrl"
+      ],
+      "type": "object"
+    }
+  },
+  "type": "object"
+}