{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "additionalProperties": false,
  "allOf": [
    {
      "if": {"properties": {"artifact_type": {"const": "tool_schema_bytes"}}},
      "then": {"required": ["input_index", "normalized_name_sha256", "raw_range"]}
    },
    {
      "if": {"properties": {"artifact_type": {"const": "tool_schema_set_bytes"}}},
      "then": {
        "not": {
          "anyOf": [
            {"required": ["input_index"]},
            {"required": ["normalized_name_sha256"]},
            {"required": ["raw_range"]}
          ]
        }
      }
    }
  ],
  "properties": {
    "artifact_kind": {"const": "tool_schema_expansion_envelope"},
    "artifact_type": {"enum": ["tool_schema_set_bytes", "tool_schema_bytes"]},
    "binding_kind": {"const": "catalog_snapshot"},
    "catalog_format": {"enum": ["anthropic_tools/v1", "openai_functions/v1"]},
    "catalog_identity_sha256": {"pattern": "^[0-9a-f]{64}$", "type": "string"},
    "evidence_boundary": {"$ref": "evidence-boundary.schema.json"},
    "input_index": {"maximum": 255, "minimum": 0, "type": "integer"},
    "normalized_name_sha256": {"pattern": "^[0-9a-f]{64}$", "type": "string"},
    "payload": {
      "additionalProperties": false,
      "properties": {
        "byte_length": {"maximum": 900000, "minimum": 0, "type": "integer"},
        "content_sha256": {"pattern": "^[0-9a-f]{64}$", "type": "string"}
      },
      "required": ["byte_length", "content_sha256"],
      "type": "object"
    },
    "raw_range": {
      "additionalProperties": false,
      "properties": {
        "end_byte": {"maximum": 900000, "minimum": 2, "type": "integer"},
        "start_byte": {"maximum": 899999, "minimum": 1, "type": "integer"}
      },
      "required": ["end_byte", "start_byte"],
      "type": "object"
    },
    "schema_version": {"const": "contextguard-receipt-tool-schema-envelope/v1"},
    "subject_identity_sha256": {"pattern": "^[0-9a-f]{64}$", "type": "string"}
  },
  "required": ["artifact_kind", "artifact_type", "binding_kind", "catalog_format", "catalog_identity_sha256", "evidence_boundary", "payload", "schema_version", "subject_identity_sha256"],
  "title": "Context Guard Receipt tool-schema expansion envelope metadata",
  "type": "object"
}