Differences from Python

chanx-go matches Python chanx on the wire, and a test pins each behaviour against values recorded from Python. These are the places it differs, each on purpose.

Case	Python chanx	chanx-go
A payload value of the wrong type that Pydantic's lax mode coerces ("3" for an int, 1 or "true" for a bool)	accepted, coerced	an error frame (int_type, bool_type...). Envelope ints (version, seq) stay lax on both
A text frame that is not JSON	Invalid JSON: and Python's decoder message	Invalid JSON: and Go's decoder message
send_message_immediately	yields after each send	not needed: each connection has a writer goroutine
A client that stops reading	left to the ASGI server	a bounded outbox; closed with 1013 after WriteTimeout
A huge frame	left to the ASGI server (uvicorn: 16 MiB)	MaxFrameSize, 16 MiB by default; closed with 1009
Handler concurrency	one task per message	one goroutine per frame; Sequential and MaxInFlight to limit it
Redis queue layer (RedisChannelLayer)	available	not yet; the pub/sub layer only
Authentication before the upgrade	after the socket is accepted	the same by default; RejectBeforeUpgrade answers an HTTP 401 or 403 instead of upgrading
Disconnect hook	disconnect() runs after the groups are left	OnDisconnect runs before, so it can still broadcast to them
Groups of a mixin	a subclass's groups replaces its parent's	each embedded struct's Groups adds to the consumer's
Broadcasting from a topic handler without naming groups	the topic's own groups, empty unless set: nobody receives it	the connection's groups
Non-ASCII names	Unicode rules: camelize("a_ß") is "aSS", a topic parameter may be {nom_é}	ASCII rules: "aß", and the pattern is refused
AsyncAPI: two schemas with one name	prefixed with the consumer's name	prefixed with the package's name
AsyncAPI: channel description	the description option, else the class docstring	the Description option only: Go has no docstrings at run time
AsyncAPI: path parameter types	from the Django converter (int, slug...)	always str: Go routes have untyped parameters
AsyncAPI: servers and security schemes	in the order given	sorted by name, since they come from Go maps
Generated client layout	a package per channel, plus shared/ and a copied base/	one package, messages.go and channels.go, on the chanxclient module
Generated names that clash	the later schema replaces the earlier	generation stops and names both
A request answered by an error frame	the error frame is the reply	a *chanxclient.RequestError

Naming

Python	Go
a message class ChatMessage(BaseMessage)	a struct embedding chanx.BaseMessage
@ws_handler async def handle_chat	a method HandleChat(ctx, ChatMessage)
@event_handler	a method taking *chanx.EventContext
@channel(name=..., tags=...)	chanx.Name, chanx.Tags route options
authenticator_class	an Authenticate method
groups = [...]	a Groups(*Conn) []string method
self.broadcast_message(m)	ctx.Broadcast(m)
ChatConsumer.broadcast_event(e, groups)	publisher.BroadcastEvent(ctx, e, groups...)
WebsocketCommunicator	chanxtest.Connect
capture_broadcast_events	chanxtest.Spy and chanxtest.BroadcastEvents
CHANX settings	chanx.Config