{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://git.eeqj.de/sneak/chat/schema/commands/NICK.json",
  "title": "NICK",
  "description": "Change nickname. C2S: request new nick. S2C: notification of nick change. RFC 1459 §4.1.2.",
  "$ref": "../message.json",
  "properties": {
    "command": { "const": "NICK" },
    "from": { "type": "string", "description": "Old nick (S2C)." },
    "body": { "type": "string", "description": "New nick.", "minLength": 1, "maxLength": 32, "pattern": "^[a-zA-Z][a-zA-Z0-9_-]*$" }
  },
  "required": ["command", "body"],
  "examples": [
    { "command": "NICK", "from": "oldnick", "body": "newnick" }
  ]
}