{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://schemas.api.aws/cloudformation/change-set.json",
  "title": "AWS CloudFormation Change Set",
  "description": "Represents an AWS CloudFormation change set. A change set allows you to preview the changes CloudFormation will make to your stack before executing them. You can create a change set, review the proposed changes, and then choose to execute or delete it.",
  "type": "object",
  "properties": {
    "ChangeSetId": {
      "type": "string",
      "description": "The ARN of the change set.",
      "pattern": "^arn:[-a-zA-Z0-9:/]*$",
      "examples": [
        "arn:aws:cloudformation:us-east-1:123456789012:changeSet/MyChangeSet/a1b2c3d4-5678-90ab-cdef-example11111"
      ]
    },
    "ChangeSetName": {
      "type": "string",
      "description": "The name of the change set.",
      "minLength": 1,
      "maxLength": 128,
      "pattern": "^[a-zA-Z][-a-zA-Z0-9]*$"
    },
    "StackId": {
      "type": "string",
      "description": "The ID of the stack associated with the change set."
    },
    "StackName": {
      "type": "string",
      "description": "The name of the stack associated with the change set."
    },
    "Description": {
      "type": ["string", "null"],
      "description": "Information about the change set.",
      "minLength": 1,
      "maxLength": 1024
    },
    "Parameters": {
      "type": "array",
      "description": "A list of parameter values for the change set.",
      "items": {
        "$ref": "#/$defs/Parameter"
      }
    },
    "CreationTime": {
      "type": "string",
      "format": "date-time",
      "description": "The start time when the change set was created."
    },
    "ExecutionStatus": {
      "type": "string",
      "description": "The execution status of the change set.",
      "enum": [
        "UNAVAILABLE",
        "AVAILABLE",
        "EXECUTE_IN_PROGRESS",
        "EXECUTE_COMPLETE",
        "EXECUTE_FAILED",
        "OBSOLETE"
      ]
    },
    "Status": {
      "type": "string",
      "description": "The current status of the change set.",
      "enum": [
        "CREATE_PENDING",
        "CREATE_IN_PROGRESS",
        "CREATE_COMPLETE",
        "DELETE_PENDING",
        "DELETE_IN_PROGRESS",
        "DELETE_COMPLETE",
        "DELETE_FAILED",
        "FAILED"
      ]
    },
    "StatusReason": {
      "type": ["string", "null"],
      "description": "A description of the change set's status, such as why the change set failed."
    },
    "NotificationARNs": {
      "type": "array",
      "description": "The ARNs of the Amazon SNS topics associated with the change set.",
      "items": {
        "type": "string"
      },
      "maxItems": 5
    },
    "RollbackConfiguration": {
      "$ref": "#/$defs/RollbackConfiguration"
    },
    "Capabilities": {
      "type": "array",
      "description": "The capabilities that are allowed in the change set.",
      "items": {
        "type": "string",
        "enum": [
          "CAPABILITY_IAM",
          "CAPABILITY_NAMED_IAM",
          "CAPABILITY_AUTO_EXPAND"
        ]
      }
    },
    "Tags": {
      "type": "array",
      "description": "Tags associated with the change set.",
      "items": {
        "$ref": "#/$defs/Tag"
      },
      "maxItems": 50
    },
    "Changes": {
      "type": "array",
      "description": "A list of structures that describe the resources and the actions that CloudFormation will perform.",
      "items": {
        "$ref": "#/$defs/Change"
      }
    },
    "IncludeNestedStacks": {
      "type": "boolean",
      "description": "Whether the change set includes changes to nested stacks."
    },
    "ImportExistingResources": {
      "type": "boolean",
      "description": "Whether the change set imports resources that already exist."
    },
    "ParentChangeSetId": {
      "type": ["string", "null"],
      "description": "The parent change set ID for nested stack change sets."
    },
    "RootChangeSetId": {
      "type": ["string", "null"],
      "description": "The root change set ID for nested stack change sets."
    },
    "ChangeSetType": {
      "type": "string",
      "description": "The type of change set operation.",
      "enum": [
        "CREATE",
        "UPDATE",
        "IMPORT"
      ]
    }
  },
  "$defs": {
    "Parameter": {
      "type": "object",
      "description": "A parameter value for the change set.",
      "properties": {
        "ParameterKey": {
          "type": "string",
          "description": "The key associated with the parameter."
        },
        "ParameterValue": {
          "type": "string",
          "description": "The input value associated with the parameter."
        },
        "UsePreviousValue": {
          "type": "boolean",
          "description": "During a stack update, use the existing parameter value."
        },
        "ResolvedValue": {
          "type": ["string", "null"],
          "description": "Read-only. The value that corresponds to an SSM parameter key."
        }
      }
    },
    "Tag": {
      "type": "object",
      "required": [
        "Key",
        "Value"
      ],
      "properties": {
        "Key": {
          "type": "string",
          "minLength": 1,
          "maxLength": 128
        },
        "Value": {
          "type": "string",
          "minLength": 0,
          "maxLength": 256
        }
      }
    },
    "RollbackConfiguration": {
      "type": "object",
      "properties": {
        "RollbackTriggers": {
          "type": "array",
          "items": {
            "type": "object",
            "required": [
              "Arn",
              "Type"
            ],
            "properties": {
              "Arn": {
                "type": "string"
              },
              "Type": {
                "type": "string"
              }
            }
          },
          "maxItems": 5
        },
        "MonitoringTimeInMinutes": {
          "type": "integer",
          "minimum": 0,
          "maximum": 180
        }
      }
    },
    "Change": {
      "type": "object",
      "description": "Describes a change to a resource within a change set.",
      "properties": {
        "Type": {
          "type": "string",
          "description": "The type of entity that CloudFormation changes.",
          "enum": [
            "Resource"
          ]
        },
        "ResourceChange": {
          "$ref": "#/$defs/ResourceChange"
        }
      }
    },
    "ResourceChange": {
      "type": "object",
      "description": "Describes the resource and the action that CloudFormation will perform on it.",
      "properties": {
        "Action": {
          "type": "string",
          "description": "The action that CloudFormation takes on the resource.",
          "enum": [
            "Add",
            "Modify",
            "Remove",
            "Import",
            "Dynamic"
          ]
        },
        "LogicalResourceId": {
          "type": "string",
          "description": "The resource's logical ID in the template."
        },
        "PhysicalResourceId": {
          "type": ["string", "null"],
          "description": "The resource's physical ID. Null for resources being added."
        },
        "ResourceType": {
          "type": "string",
          "description": "The type of CloudFormation resource."
        },
        "Replacement": {
          "type": ["string", "null"],
          "description": "Whether the change requires the resource to be replaced.",
          "enum": [
            "True",
            "False",
            "Conditional",
            null
          ]
        },
        "Scope": {
          "type": "array",
          "description": "The properties or attributes whose changes triggered this resource change.",
          "items": {
            "type": "string",
            "enum": [
              "Properties",
              "Metadata",
              "CreationPolicy",
              "UpdatePolicy",
              "DeletionPolicy",
              "UpdateReplacePolicy",
              "Tags"
            ]
          }
        },
        "Details": {
          "type": "array",
          "description": "Details about the changes to the resource.",
          "items": {
            "$ref": "#/$defs/ResourceChangeDetail"
          }
        }
      }
    },
    "ResourceChangeDetail": {
      "type": "object",
      "description": "Detailed information about a resource change.",
      "properties": {
        "Target": {
          "type": "object",
          "properties": {
            "Attribute": {
              "type": "string",
              "description": "The attribute that changed.",
              "enum": [
                "Properties",
                "Metadata",
                "CreationPolicy",
                "UpdatePolicy",
                "DeletionPolicy",
                "UpdateReplacePolicy",
                "Tags"
              ]
            },
            "Name": {
              "type": ["string", "null"],
              "description": "The property name if the attribute is Properties."
            },
            "RequiresRecreation": {
              "type": "string",
              "description": "Whether the change requires replacement.",
              "enum": [
                "Never",
                "Conditionally",
                "Always"
              ]
            }
          }
        },
        "Evaluation": {
          "type": "string",
          "description": "Whether CloudFormation can determine the target value.",
          "enum": [
            "Static",
            "Dynamic"
          ]
        },
        "ChangeSource": {
          "type": "string",
          "description": "The entity that made the change.",
          "enum": [
            "ResourceReference",
            "ParameterReference",
            "ResourceAttribute",
            "DirectModification",
            "Automatic"
          ]
        },
        "CausingEntity": {
          "type": ["string", "null"],
          "description": "The identity of the entity that triggered this change."
        }
      }
    }
  }
}