Changelog

1.43.0

(feat): Expose Stream[T].LastRetryMs() on the SSE runtime, mirroring LastEventID(). It returns the most recently advertised retry: reconnection time in milliseconds (sticky per the SSE spec), so callers can read the directive even when the server sends it in its own frame with no data: — in which case the per-event StreamEvent.Retry is 0. The value persists across reconnects.

1.42.2

(fix): Generated wiremock-mappings.json now matches nullable date-time query and header parameters with millisecond precision so the stub matches what the Go SDK actually sends. Previously, when a date-time field was wrapped in a nullable container (e.g. with respect-nullable-schemas: true and coerce-optional-schemas-to-nullable: true), the stub matcher used "2024-01-15T09:30:00Z" while the SDK serialized "2024-01-15T09:30:00.000Z", causing WireMock to return 404.

1.42.1

(fix): Fix dynamic snippet generation for enum path parameters. Path parameters inlined as struct fields on a wrapped request now use the enum value directly (e.g. Action: prelude.ActionAllow) instead of .Ptr(), which produced a typecheck error when the struct field is a non-pointer required enum. Path parameters passed as positional function arguments continue to use .Ptr() when the SDK signature takes a pointer.

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.

1.41.4

(fix): Dynamic snippets now render path-parameter arguments in IR (URL / SDK signature) order rather than in the order they happen to appear in the input request, so generated examples line up with the actual SDK method signature even when the spec lists path parameters in a different order.

1.41.3

(chore): Patch /usr/local/go/src/go.mod, vendor/modules.txt, and go.sum in the go-sdk + go-model containers so they declare golang.org/x/net v0.53.0. Go 1.26.3 already ships the CVE-2026-33814 fix in its bundled h2_bundle.go (the HTTP/2 SETTINGS_MAX_FRAME_SIZE validation moved to the top of ForeachSetting), but the stdlib SBOM still pins the pre-fix x/net pseudo-version v0.47.1-0.20260417*. Bumping the SBOM metadata to v0.53.0 makes grype reflect the patched code instead of flagging the toolchain as vulnerable.

1.41.2

(fix): Stop launching WireMock with --global-response-templating in generated wire-test docker-compose.test.yml. Response examples containing literal {{...}} are now served verbatim instead of being passed through WireMock’s Handlebars transformer, which would fail to resolve them as helpers and return 500.

1.41.1

(chore): Patch Go SDK + Go model generator container CVEs flagged in the AWS ECR / grype scan. Bump the Go base image to golang:1.26.3-alpine3.23, refresh apk upgrade, and patch npm’s bundled picomatch@4.0.3 -> 4.0.4 and brace-expansion@5.0.4 -> 5.0.5 via tarball replacement so the published image no longer ships the vulnerable bundled JS dependencies that grype flags. Also drop the internal/testdata/** test fixtures and clear the /go/pkg/mod + /root/.cache/go-build build caches from the runtime image so grype no longer scans them as a source of stale yaml.v3 and golang.org/x/net pseudo-versions that are not actually linked into /fern-go-sdk.

1.41.0

(feat): Add a With<AuthToken>Func option for bearer auth that accepts a func() (string, error) callable. The callable is evaluated at request time when no static token is set, matching the callable auth behavior available in the Python and TypeScript SDK generators.

1.40.4

(chore): Bump the Go SDK and Go model generator containers’ Node base image from node:22.22-alpine3.23 to node:24.15-alpine3.23. Aligns the generators with the rest of the Fern generator containers on a single Node major version (Node 24) and picks up Node 24’s CVE patches. The existing npm pack <pkg>@latest loop that swaps in patched ip-address, brace-expansion, and picomatch is retained because npm pack @latest continues to resolve the same fixed releases on Node 24.