{
    "$schema": "http://json-schema.org/draft/2020-12/schema",
    "type": "array",
    "uniqueItems": true,
    "items": {
        "type": "object",
        "oneOf": [
            {
                "type": "object",
                "properties": {
                    "action": {
                        "enum": [
                            "add"
                        ]
                    },
                    "when": {
                        "type": "string",
                        "pattern": "^([0-9a-f]{40}|\\d{4}\\.\\d{2}\\.\\d{2})$"
                    },
                    "hash": {
                        "type": "string",
                        "pattern": "^[0-9a-f]{40}$"
                    },
                    "short": {
                        "type": "string"
                    },
                    "authors": {
                        "type": "array",
                        "items": {
                            "type": "string"
                        }
                    }
                },
                "required": [
                    "action",
                    "short"
                ]
            },
            {
                "type": "object",
                "properties": {
                    "action": {
                        "enum": [
                            "remove"
                        ]
                    },
                    "when": {
                        "type": "string",
                        "pattern": "^([0-9a-f]{40}|\\d{4}\\.\\d{2}\\.\\d{2})$"
                    },
                    "hash": {
                        "type": "string",
                        "pattern": "^[0-9a-f]{40}$"
                    }
                },
                "required": [
                    "action",
                    "hash"
                ]
            },
            {
                "type": "object",
                "properties": {
                    "action": {
                        "enum": [
                            "change"
                        ]
                    },
                    "when": {
                        "type": "string",
                        "pattern": "^([0-9a-f]{40}|\\d{4}\\.\\d{2}\\.\\d{2})$"
                    },
                    "hash": {
                        "type": "string",
                        "pattern": "^[0-9a-f]{40}$"
                    },
                    "short": {
                        "type": "string"
                    },
                    "authors": {
                        "type": "array",
                        "items": {
                            "type": "string"
                        }
                    }
                },
                "required": [
                    "action",
                    "hash",
                    "short",
                    "authors"
                ]
            }
        ]
    }
}
