{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/DY-2026/GameDesignOS/main/contracts/assumption-registry.schema.json",
  "title": "GameDesignOS v1 Assumption Registry",
  "oneOf": [
    { "$ref": "#/$defs/registry" },
    { "$ref": "#/$defs/single_assumption" }
  ],
  "$defs": {
    "registry": {
      "type": "object",
      "required": ["schema_version", "workspace_id", "assumptions"],
      "additionalProperties": false,
      "properties": {
        "schema_version": { "type": "string", "const": "1.0.0" },
        "workspace_id": { "type": "string", "minLength": 1 },
        "assumptions": {
          "type": "array",
          "items": { "$ref": "#/$defs/assumption" }
        }
      }
    },
    "single_assumption": {
      "allOf": [
        { "$ref": "#/$defs/assumption" },
        { "required": ["schema_version"] }
      ]
    },
    "assumption": {
      "type": "object",
      "required": [
        "assumption_id",
        "statement",
        "type",
        "risk_level",
        "confidence",
        "linked_decisions",
        "test_method",
        "validation_status",
        "kill_condition"
      ],
      "additionalProperties": false,
      "properties": {
        "schema_version": { "type": "string", "const": "1.0.0" },
        "assumption_id": { "type": "string", "pattern": "^ASM-[A-Z0-9-]{3,}$" },
        "statement": { "type": "string", "minLength": 1 },
        "type": { "type": "string", "minLength": 1 },
        "risk_level": { "enum": ["low", "medium", "high", "critical"] },
        "confidence": { "enum": ["low", "medium", "high"] },
        "linked_decisions": {
          "type": "array",
          "items": { "type": "string", "pattern": "^DEC-[A-Z0-9-]{3,}$" },
          "uniqueItems": true
        },
        "test_method": { "type": "string" },
        "validation_status": {
          "enum": ["untested", "planned", "tested", "validated", "invalidated", "waived"]
        },
        "kill_condition": { "type": "string" },
        "validation_note": { "type": "string" },
        "updated_at": { "type": "string" }
      }
    }
  }
}