{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://memabra.local/schemas/memory_record.schema.json",
  "title": "MemoryRecord",
  "description": "Long-term memory record stored by memabra with explicit layer typing and verification metadata.",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "id",
    "memory_type",
    "fact_status",
    "content",
    "summary",
    "source",
    "confidence",
    "created_at",
    "updated_at",
    "verification"
  ],
  "properties": {
    "id": {"type": "string", "minLength": 1},
    "memory_type": {
      "type": "string",
      "enum": ["semantic", "procedural", "episodic", "working"]
    },
    "fact_status": {
      "type": "string",
      "enum": ["draft", "assumed", "verified", "deprecated", "revoked"]
    },
    "content": {"type": "string", "minLength": 1},
    "summary": {"type": "string", "minLength": 1},
    "source": {
      "type": "object",
      "additionalProperties": false,
      "required": ["kind", "ref"],
      "properties": {
        "kind": {"type": "string", "enum": ["user", "session", "tool", "import", "system"]},
        "ref": {"type": "string", "minLength": 1}
      }
    },
    "confidence": {"type": "number", "minimum": 0, "maximum": 1},
    "tags": {
      "type": "array",
      "items": {"type": "string"},
      "default": []
    },
    "related_entities": {
      "type": "array",
      "items": {"type": "string"},
      "default": []
    },
    "created_at": {"type": "string", "format": "date-time"},
    "updated_at": {"type": "string", "format": "date-time"},
    "last_used_at": {"type": ["string", "null"], "format": "date-time"},
    "expires_at": {"type": ["string", "null"], "format": "date-time"},
    "verification": {
      "type": "object",
      "additionalProperties": false,
      "required": ["status", "last_checked_at", "check_method"],
      "properties": {
        "status": {"type": "string", "enum": ["unknown", "pending", "confirmed", "disputed", "failed"]},
        "last_checked_at": {"type": ["string", "null"], "format": "date-time"},
        "check_method": {"type": ["string", "null"]}
      }
    },
    "revocation": {
      "type": ["object", "null"],
      "additionalProperties": false,
      "properties": {
        "reason": {"type": "string"},
        "revoked_at": {"type": "string", "format": "date-time"}
      }
    }
  }
}