asyncapi-3-channel-servers checks that channel servers entries point to named root-level servers. Channels should not point at missing servers or component server definitions.

Why did this violation appear?

A channel server reference points somewhere other than #/servers/<name> or names a root server that does not exist.

Bad example

asyncapi: 3.1.0
servers:
  production:
    host: events.example.com
    protocol: mqtt
channels:
  userEvents:
    address: users
    servers:
      - $ref: '#/components/servers/production'

Good example

asyncapi: 3.1.0
servers:
  production:
    host: events.example.com
    protocol: mqtt
channels:
  userEvents:
    address: users
    servers:
      - $ref: '#/servers/production'

How do I fix this violation?

Reference root servers with #/servers/<serverName> and make sure each named server exists.