{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://schemas.columnzero.com/columnzero-schemas/v1/1.0.0/schema-index.schema.json",
  "title": "Schema artifact index",
  "description": "The root index.json carried by a schemas.tar.gz release artifact. Version 1, matching schema_index: 1.",
  "type": "object",
  "additionalProperties": false,
  "required": ["schema_index", "project", "release", "schemas"],
  "properties": {
    "schema_index": {
      "description": "Contract version. The publisher accepts only 1.",
      "const": 1
    },
    "project": {
      "description": "Project name. Must equal the locked artifact's project and forms the first URL segment.",
      "type": "string",
      "pattern": "^[A-Za-z0-9][A-Za-z0-9._-]*$"
    },
    "release": {
      "description": "SemVer release. Must equal the locked artifact's version.",
      "type": "string",
      "pattern": "^(0|[1-9]\\d*)\\.(0|[1-9]\\d*)\\.(0|[1-9]\\d*)(?:-[0-9A-Za-z.-]+)?$"
    },
    "schemas": {
      "type": "array",
      "minItems": 1,
      "items": {
        "type": "object",
        "additionalProperties": false,
        "required": ["path", "compat", "dialect"],
        "properties": {
          "path": {
            "description": "Path to the schema file within the archive. The basename becomes the published filename, so basenames must be unique across the index.",
            "type": "string",
            "pattern": "^(?:[A-Za-z0-9][A-Za-z0-9._-]*/)*[A-Za-z0-9][A-Za-z0-9._-]*\\.schema\\.json$"
          },
          "compat": {
            "description": "Compatibility line this release belongs to: the SemVer major, or 0.MINOR before 1.0. Must agree with release.",
            "type": "string",
            "pattern": "^(?:[1-9]\\d*|0\\.(?:0|[1-9]\\d*))$"
          },
          "dialect": {
            "description": "JSON Schema dialect. Must equal the $schema declared inside the file.",
            "type": "string",
            "format": "uri"
          }
        }
      }
    }
  }
}