{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://git.eeqj.de/sneak/chat/schema/commands/JOIN.json",
  "title": "JOIN",
  "description": "Join a channel. C2S: request to join. S2C: notification that a user joined. RFC 1459 §4.2.1.",
  "$ref": "../message.json",
  "properties": {
    "command": { "const": "JOIN" },
    "from": {
      "type": "string",
      "description": "Nick that joined (S2C only)."
    },
    "to": {
      "type": "string",
      "description": "Channel name.",
      "pattern": "^#[a-zA-Z0-9_-]+$"
    }
  },
  "required": ["command", "to"],
  "examples": [
    { "command": "JOIN", "from": "alice", "to": "#general" }
  ]
}