{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://datenoio.github.io/undatum/schemas/undatum.schema-diff.v1.json",
  "title": "Schema changes between two files or declared schemas",
  "description": "Printed by `undatum diff --schema --json`.",
  "type": "object",
  "properties": {
    "schema": {
      "const": "undatum.schema-diff/1",
      "description": "Result layout"
    },
    "old": {
      "type": "string",
      "description": "Baseline file or schema"
    },
    "new": {
      "type": "string",
      "description": "Compared file or schema"
    },
    "summary": {
      "type": "object",
      "description": "Changes per kind: added, removed, type, nullability"
    },
    "changes": {
      "type": "array",
      "description": "Changes: kind, field, old and new type or nullability"
    },
    "renames": {
      "type": "array",
      "description": "Likely renames: old, new, name_similarity, value_overlap"
    }
  },
  "required": [
    "schema",
    "old",
    "new",
    "summary",
    "changes",
    "renames"
  ]
}