`structural-non-array-required-extensions`

requiredExtensions must be an array

structural invalid

Layer: structural
Expected result: invalid
Expected diagnostic: JPS-STRUCTURE-TYPE at /metadata/requiredExtensions
Specification: §9
Supported extensions: com.example.review-policy

The expected result is conformance-corpus metadata, not a claim about factual grounding, authority, safety, or operational fitness.

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Exact fixture

{
  "specVersion": "0.3.0",
  "id": "https://example.com/judgment-packs/non-array-required-extensions",
  "version": "0.1.0",
  "title": "Required extensions without an array",
  "decision": {
    "intent": "Exercise successful required-extension capability negotiation.",
    "question": "Can a capable consumer fully interpret the pack?"
  },
  "outcomes": [
    {
      "id": "accept",
      "label": "Accept"
    },
    {
      "id": "reject",
      "label": "Reject"
    }
  ],
  "rules": [
    {
      "id": "literal-rule",
      "description": "Carries data understood by the declared consumer capability.",
      "when": {
        "op": "literal",
        "value": true
      },
      "outcome": "accept",
      "onUnknown": "ignore",
      "extensions": {
        "com.example.review-policy": {
          "reviewMode": "two-person"
        }
      }
    }
  ],
  "metadata": {
    "requiredExtensions": "com.example.review-policy"
  }
}