4.0.3
(fix): Fix WebSocket handleIncomingMessage() using Fern-internal message IDs
(e.g. AgentV1Welcome, ListenV1Results) instead of the wire discriminant
values from the spec (e.g. Welcome, Results). This caused all incoming
message handlers to never fire, falling through to the unknown type handler.
The generator now extracts wire discriminant values from each message body’s
type property — resolving literal values (e.g. literal<"Welcome">) and
enum values (e.g. enum[Flushed, Cleared]) — and dispatches via a switch
statement on those values. This aligns with the approach used by the Python
generator.
(fix): WebSocket handler registration methods and field names now use
wire discriminant values instead of Fern-internal prefixed names. For example,
onAgentV1Welcome(handler) is now onWelcome(handler), and
onAgentV1PromptUpdated(handler) is now onPromptUpdated(handler). Methods
that were already backed by a custom x-fern-sdk-method-name (e.g.
onFunctionCallResponse) are unchanged.
(chore): Improve generated WebSocket client code quality: use a string literal for
static URL paths instead of StringBuilder, remove dead if/else branches in
async sendMessage(), consolidate redundant catch blocks in message dispatch,
and correct Javadoc articles (“a” vs “an”) for type names starting with vowels.
