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Changelog

May 18, 2026
May 18, 2026

1.42.0

(feat): Add streaming reconnect options on every Go SDK request: option.WithMaxStreamReconnectAttempts(uint), option.WithoutStreamReconnection(), and option.WithoutRetries().

For SSE endpoints whose Fern definition sets response-stream.resumable: true (or whose OpenAPI sets x-fern-streaming.resumable: true), the generated streaming methods now reconnect transparently on mid-stream connection drops using SSE Last-Event-ID semantics, honoring server-sent retry: directives and capped by MaxStreamReconnectAttempts (default 5).

No behavior change for endpoints that do not opt into resumable: true. The new option constructors are emitted unconditionally and have no effect on those endpoints.

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