{
  "name": "cache.count",
  "description": "Counts cached items matching the optional filter",
  "signature": {
    "input": {
      "kind": "cache-key",
      "description": "Optional filter for cache keys",
      "required": false,
      "mode": "ValueOrExpression"
    },
    "output": {
      "mode": "Value",
      "kind": "integer,number",
      "description": "Resolves to the number of cached items matching the optional filter"
    }
  }
}