=== META ===
{
  "id": "GTPX-ACK-HASH",
  "title": "GTPX Acknowledgment and Hash Integrity Model",
  "version": "0.1.1",
  "status": "draft",
  "updated": "2026-04-26",
  "authority": "06_protocol/GTPX-ACK-HASH.gtpx",
  "type": "protocol_integrity",
  "project": "GTPX",
  "depends_on": [
    "03_language/GTPX-ENUMS.gtpx",
    "06_protocol/GTPX-RESPONSE-MODEL.gtpx"
  ]
}

=== DATA ===
{
  "purpose": "Defines how responses are acknowledged and how integrity is validated through hashing. Integrates response delivery constraints to ensure deterministic and auditable outputs.",

  "ack_policy": {
    "ack_is_mandatory": true,
    "ack_values_must_use_gtpx_enums": true,
    "ack_is_required_for_all_responses": true
  },

  "hash_policy": {
    "hash_algorithm": "sha256",
    "hash_is_required_for_atomic_responses": true,
    "hash_must_be_deterministic": true,
    "hash_input_must_be_normalized": true,
    "hash_verification_is_mandatory": true
  },

  "response_integrity_policy": {
    "ack_requires_complete_response": true,
    "atomic_response_hash_required": true,
    "streaming_response_cannot_be_acknowledged_as_complete": true,
    "incomplete_response_cannot_be_acknowledged": true,
    "interrupted_stream_results_in": "READ_REJECTED",
    "response_delivery_status_must_be_complete_for_valid_ack": true
  },

  "hash_input_rules": {
    "must_include": [
      "response_sections",
      "ordered_structure",
      "normalized_whitespace"
    ],
    "must_exclude": [
      "transport_metadata",
      "stream_chunks",
      "non_deterministic_tokens"
    ]
  },

  "ack_behavior": {
    "READ_COMPLETE": {
      "conditions": [
        "response_delivery_status == complete",
        "complete == true",
        "response_mode == atomic",
        "hash_verified == true"
      ]
    },
    "READ_REJECTED": {
      "conditions": [
        "response_delivery_status != complete",
        "complete != true",
        "response_mode != atomic",
        "hash_mismatch == true",
        "response_interrupted == true"
      ]
    },
    "HASH_MISMATCH": {
      "conditions": [
        "hash_verification_failed == true"
      ]
    }
  }
}

=== RULES ===
{
  "ack_must_reflect_delivery_integrity": true,
  "hash_must_be_computed_before_ack": true,
  "atomic_response_without_hash_is_invalid": true,
  "incomplete_response_is_invalid": true,
  "interrupted_stream_is_invalid": true,
  "ack_cannot_be_read_complete_for_streaming": true,
  "ack_cannot_be_read_complete_for_partial_response": true
}

=== STATUS ===
{
  "state": "draft",
  "open_questions": [
    "Confirm canonical normalization rules for hashing (line endings, spacing, encoding).",
    "Confirm whether response_meta is part of hash input.",
    "Define handling for large responses and chunked processing."
  ],
  "next_step": "Integrate delivery enforcement into contract layer."
}