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Use "type": "boolean" for true/false values.

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Example

{
  "type": "object",
  "properties": {
    "is_active": { "type": "boolean" },
    "email_verified": { "type": "boolean" }
  },
  "required": ["is_active", "email_verified"],
  "additionalProperties": false
}
Values must be the literals true or false, not quoted strings (“true” is rejected). Truthy integers like 1 and 0 are not accepted. Booleans are best for explicit flags. If you need multiple states, use a string enum instead.