{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "reader-contract.schema.json",
  "title": "02_reader_contract.json",
  "type": "object",
  "required": ["schema_version", "document_kind", "primary_audience", "purpose", "reader_question", "reader_outcome", "prerequisites", "assumed_known", "must_explain", "non_goals"],
  "properties": {
    "schema_version": {"const": "1.0"},
    "document_kind": {"enum": ["explanation", "decision", "how-to", "reference"]},
    "primary_audience": {"type": "string", "minLength": 1, "pattern": "\\S"},
    "purpose": {"type": "string", "minLength": 1, "pattern": "\\S"},
    "reader_question": {"type": "string", "minLength": 1, "pattern": "\\S"},
    "reader_outcome": {"type": "string", "minLength": 1, "pattern": "\\S"},
    "prerequisites": {"$ref": "#/$defs/stringList"},
    "assumed_known": {"$ref": "#/$defs/stringList"},
    "must_explain": {"$ref": "#/$defs/stringList"},
    "non_goals": {"$ref": "#/$defs/stringList"}
  },
  "$defs": {
    "stringList": {"type": "array", "items": {"type": "string", "minLength": 1, "pattern": "\\S"}, "uniqueItems": true}
  },
  "additionalProperties": false
}