GovGazette

Review exclusion changes

exclusion_changes

Read-onlyIdempotent

Compare two retained snapshots. No longer observed does not mean reinstated; enrichment-only changes are excluded.

Input Schema

TableJSON Schema

Name	Required	Description
`limit`	No	Maximum changes to return, up to the service page limit.
`cursor`	No	Opaque next_cursor from an earlier change page.
`to_generation`	No	Newer retained snapshot UUID; omit for the current snapshot.
`from_generation`	Yes	Older retained snapshot UUID to compare.

Output Schema

TableJSON Schema

Name	Required	Description	Default
`items`	Yes
`meaning`	Yes
`next_cursor`	No
`to_coverage`	Yes
`from_coverage`	Yes
`to_generation`	Yes
`from_generation`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed3 schema fields changedOct 8, 2026

addedOutput schema / $defs / SourceFreshness / properties / attention_required
```
Added value: +{
+  "type": "boolean"
+}
```

addedOutput schema / $defs / SourceFreshness / properties / warn_age_seconds

Added value: +{
+  "description": "Early-warning boundary, separate from the stale-source boundary.",
+  "format": "int64",
+  "type": "integer"
+}

changedOutput schema / $defs / SourceFreshness / required

Previous value: -[
-  "state",
-  "evaluated_at",
-  "max_age_seconds"
-]New value: +[
+  "state",
+  "evaluated_at",
+  "max_age_seconds",
+  "warn_age_seconds",
+  "attention_required"
+]

Changed6 schema fields changedOct 6, 2026

addedOutput schema / $defs / ExclusionCoverage

Added value: +{
+  "properties": {
+    "freshness": {
+      "$ref": "#/$defs/SourceFreshness",
+      "description": "Fresh, stale, unknown or unavailable, with age and the 24-hour warning policy."
+    },
+    "observed_at": {
+      "description": "Observation time does not replace the official source timestamp.",
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "scope": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "sha256": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "source_date": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "source_url": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "status": {
+      "description": "Present as unavailable when no SAM coverage exists in this generation.",
+      "type": [
+        "string",
+        "null"
+      ]
+    }
+  },
+  "required": [
+    "freshness"
+  ],
+  "type": "object"
+}

addedOutput schema / $defs / FreshnessState

Added value: +{
+  "enum": [
+    "fresh",
+    "stale",
+    "unknown",
+    "unavailable"
+  ],
+  "type": "string"
+}

removedOutput schema / $defs / JsonObject

Removed value: -{
-  "description": "Source-specific JSON map. The envelope is stable; map keys vary by official source.",
-  "type": "object"
-}

addedOutput schema / $defs / SourceFreshness

Added value: +{
+  "properties": {
+    "evaluated_at": {
+      "description": "UTC time when age was evaluated; source and observation dates are unchanged.",
+      "type": "string"
+    },
+    "max_age_seconds": {
+      "description": "Explicit warning threshold for this daily snapshot. Not a scheduler promise.",
+      "format": "int64",
+      "type": "integer"
+    },
+    "source_age_seconds": {
+      "description": "Age of the official source timestamp, never the import or enrichment timestamp.",
+      "format": "int64",
+      "type": [
+        "integer",
+        "null"
+      ]
+    },
+    "state": {
+      "$ref": "#/$defs/FreshnessState"
+    },
+    "warning": {
+      "description": "User-facing warning, or null when within the warning threshold.",
+      "type": [
+        "string",
+        "null"
+      ]
+    }
+  },
+  "required": [
+    "state",
+    "evaluated_at",
+    "max_age_seconds"
+  ],
+  "type": "object"
+}

changedOutput schema / properties / from_coverage / $ref

Previous value: -"#/$defs/JsonObject"New value: +"#/$defs/ExclusionCoverage"

changedOutput schema / properties / to_coverage / $ref

Previous value: -"#/$defs/JsonObject"New value: +"#/$defs/ExclusionCoverage"

Changed2 schema fields changedOct 2, 2026
- addedInput schema / properties / limit / maximum
```
Added value: +50
```
- changedInput schema / properties / limit / minimum
```
Previous value: -0New value: +1
```

Changed5 schema fields changedSep 24, 2026

addedInput schema / properties / cursor / description

Added value: +"Opaque next_cursor from an earlier change page."

addedInput schema / properties / from_generation / description
```
Added value: +"Older retained snapshot UUID to compare."
```

addedInput schema / properties / limit / description

Added value: +"Maximum changes to return, up to the service page limit."

addedInput schema / properties / to_generation / description

Added value: +"Newer retained snapshot UUID; omit for the current snapshot."

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "$defs": {
+    "ExclusionChange": {
+      "properties": {
+        "change": {
+          "type": "string"
+        },
+        "id": {
+          "type": "string"
+        },
+        "title": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "id",
+        "title",
+        "change"
+      ],
+      "type": "object"
+    },
+    "JsonObject": {
+      "description": "Source-specific JSON map. The envelope is stable; map keys vary by official source.",
+      "type": "object"
+    }
+  },
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "properties": {
+    "from_coverage": {
+      "$ref": "#/$defs/JsonObject"
+    },
+    "from_generation": {
+      "type": "string"
+    },
+    "items": {
+      "items": {
+        "$ref": "#/$defs/ExclusionChange"
+      },
+      "type": "array"
+    },
+    "meaning": {
+      "type": "string"
+    },
+    "next_cursor": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "to_coverage": {
+      "$ref": "#/$defs/JsonObject"
+    },
+    "to_generation": {
+      "type": "string"
+    }
+  },
+  "required": [
+    "from_generation",
+    "to_generation",
+    "from_coverage",
+    "to_coverage",
+    "items",
+    "meaning"
+  ],
+  "type": "object"
+}

AddedSep 23, 2026

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