{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://adcontextprotocol.org/schemas/3.3.0-beta.1/error-details/reference-definition-changed.json",
  "title": "Reference Definition Changed Details",
  "description": "Recommended details shape for REFERENCE_DEFINITION_CHANGED errors, one error per drifted pin. error.field identifies the failing pin as a path into the proposal's commercial_terms, such as commercial_terms.definition_pins[2]. The details object carries the digest the definition resolves to now so the buyer can compare it with the pin it holds. Producer-authored values MUST remain buyer-safe and MUST NOT contain fetch targets, resolver errors, internal identifiers, or other producer-private detail.",
  "x-added-in": "3.3.0",
  "type": "object",
  "properties": {
    "current_content_digest": {
      "type": "string",
      "pattern": "^[a-f0-9]{64}$",
      "description": "Lowercase-hex SHA-256 the pinned definition resolves to now, computed with the same projection as the pin. Omitted only when the entry was withdrawn from a successfully fetched, validated document."
    },
    "pinned_content_digest": {
      "type": "string",
      "pattern": "^[a-f0-9]{64}$",
      "description": "The content_digest carried by the failing pin."
    },
    "ref_kind": {
      "$ref": "https://adcontextprotocol.org/schemas/3.3.0-beta.1/enums/definition-pin-ref-kind.json"
    },
    "reference": {
      "type": "object",
      "description": "The closed reference identity of the failing pin, copied from the pin so a buyer can match by identity rather than by index."
    },
    "pin_index": {
      "type": "integer",
      "minimum": 0,
      "description": "Zero-based position of the failing pin in the proposal's commercial_terms.definition_pins, matching the index in error.field."
    }
  },
  "additionalProperties": true
}