{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://genesiscode.dev/schemas/version-surfaces-v0.1.json",
  "title": "GenesisCode Version Surfaces v0.1",
  "type": "object",
  "additionalProperties": false,
  "required": ["schema", "release_train", "policy", "surfaces", "migrations"],
  "properties": {
    "schema": {"const": "genesis/version-surfaces-v0.1"},
    "release_train": {"type": "string", "pattern": "^[0-9]+\\.[0-9]+\\.[0-9]+$"},
    "policy": {
      "type": "object",
      "additionalProperties": false,
      "required": ["current_writer_only", "future_versions", "missing_discriminator", "legacy_reader_rule"],
      "properties": {
        "current_writer_only": {"const": true},
        "future_versions": {"const": "reject"},
        "missing_discriminator": {"const": "reject-except-named-migration"},
        "legacy_reader_rule": {"type": "string", "minLength": 1}
      }
    },
    "surfaces": {
      "type": "array",
      "minItems": 1,
      "items": {"$ref": "#/$defs/surface"}
    },
    "migrations": {
      "type": "array",
      "items": {"$ref": "#/$defs/migration"}
    }
  },
  "$defs": {
    "nonEmptyStrings": {
      "type": "array",
      "minItems": 1,
      "uniqueItems": true,
      "items": {"type": "string", "minLength": 1}
    },
    "surface": {
      "type": "object",
      "additionalProperties": false,
      "required": ["id", "kind", "discriminator", "current_writer", "accepted_readers", "authorities", "specs", "migrations"],
      "properties": {
        "id": {"type": "string", "pattern": "^[a-z][a-z0-9-]*$"},
        "kind": {"type": "string", "minLength": 1},
        "discriminator": {"type": "string", "minLength": 1},
        "current_writer": {"type": "string", "minLength": 1},
        "accepted_readers": {"$ref": "#/$defs/nonEmptyStrings"},
        "wire_identity": {"type": "string", "minLength": 1},
        "authorities": {"$ref": "#/$defs/nonEmptyStrings"},
        "specs": {"$ref": "#/$defs/nonEmptyStrings"},
        "migrations": {"type": "array", "uniqueItems": true, "items": {"type": "string", "pattern": "^M-[A-Z0-9-]+$"}}
      }
    },
    "migration": {
      "type": "object",
      "additionalProperties": false,
      "required": ["id", "surface", "from", "to", "reader", "writer", "semantic_delta", "user_action", "tests", "retirement"],
      "properties": {
        "id": {"type": "string", "pattern": "^M-[A-Z0-9-]+$"},
        "surface": {"type": "string", "minLength": 1},
        "from": {"type": "string", "minLength": 1},
        "to": {"type": "string", "minLength": 1},
        "reader": {"type": "string", "minLength": 1},
        "writer": {"type": "string", "minLength": 1},
        "semantic_delta": {"type": "string", "minLength": 1},
        "user_action": {"type": "string", "minLength": 1},
        "tests": {"$ref": "#/$defs/nonEmptyStrings"},
        "retirement": {"type": "string", "minLength": 1}
      }
    }
  }
}