Issues

• SDK variables: optional env-var fallback (IR envVar) + support in Go/C#/Ruby/PHP generators (Twilio subaccount routing)

  fern-api/fern#18048 · Filter by author devin-ai-integration opened on Oct 6, 2026

• fern docs dev reports false api-section-has-definition errors for every api-name nav item (regression in 5.133.0)

  fern-api/fern#17999 · Filter by author kadriiiii opened on Oct 5, 2026

• [typescript] An auth setting in generators.yml marks every AsyncAPI channel as needing credentials

  fern-api/fern#17998 · Filter by author joeblew999 opened on Oct 3, 2026

• [typescript] endpoint-security with an AsyncAPI WebSocket channel: the WebSocket client uses _metadata it never declares, and the SDK is not written

  fern-api/fern#17997 · Filter by author joeblew999 opened on Oct 3, 2026

• [cli generator] With several auth schemes under auth: any, the CLI sends only the first credential it has

  fern-api/fern#17996 · Filter by author joeblew999 opened on Oct 3, 2026

• Rust SDK: generated crate docs claim the SDK is official

  component:sdkslang:rustpriority:p2-medium
  fern-api/fern#17941 · Filter by author adriendellagaspera opened on Sep 30, 2026

• Rust SDK: configurable subclient class names

  component:sdkslang:rustpriority:p2-medium
  fern-api/fern#17940 · Filter by author adriendellagaspera opened on Sep 30, 2026

• CLI generator: SSE commands don't stream in json/jsonl formats; terminator not escaped in Rust

  fern-api/fern#17939 · Filter by author joeblew999 opened on Sep 30, 2026

• SSE clients ignore the event: field, so an event: error block is decoded as a stream item

  fern-api/fern#17938 · Filter by author joeblew999 opened on Sep 30, 2026

• SSE resumable: no reconnect after a network reset (only after a clean EOF)

  fern-api/fern#17937 · Filter by author joeblew999 opened on Sep 30, 2026

• SSE terminator is matched as a substring, and Go applies [DONE] when none is declared

  fern-api/fern#17936 · Filter by author joeblew999 opened on Sep 30, 2026

• Rust SDK: ergonomic constructor for simple auth

  fern-api/fern#17935 · Filter by author adriendellagaspera opened on Sep 29, 2026

• OpenAPI importer ignores x-fern-sdk-group-name without x-fern-sdk-method-name

  component:clipriority:p2-medium
  fern-api/fern#17932 · Filter by author adriendellagaspera opened on Sep 29, 2026

• OpenAPI importer rejects leading-hyphen string enum default

  component:clipriority:p2-medium
  fern-api/fern#17931 · Filter by author adriendellagaspera opened on Sep 29, 2026

• OpenAPI importer rejects intentional allOf property narrowing

  component:clipriority:p2-medium
  fern-api/fern#17930 · Filter by author adriendellagaspera opened on Sep 29, 2026

• OpenAPI importer: inline generated type can collide with a top-level component

  component:clipriority:p2-medium
  fern-api/fern#17929 · Filter by author adriendellagaspera opened on Sep 29, 2026

• Rust SDK: multipart/form-data + SSE generates non-compiling code

  component:sdkslang:rustpriority:p1-high
  fern-api/fern#17928 · Filter by author adriendellagaspera opened on Sep 29, 2026

• [NodeJS] FormDataWrapper - Stream Issues

  component:sdkslang:typescriptpriority:p1-high
  Bug

  fern-api/fern#17890 · Filter by author CodeSmith32 opened on Sep 25, 2026

• Go SDK: CLI-written User-Agent and metadata module path ignore the /vN suffix the generator appends from v2.0.0

  fern-api/fern#17861 · Filter by author baked-dev opened on Sep 24, 2026

• Security schemes "endpoint security" does not works as expected

  component:sdkslang:pythonlang:typescriptpriority:p0-critical
  Bug

  fern-api/fern#17775 · Filter by author gael-ft opened on Sep 17, 2026
  2

• Support legacy badge for availability on MDX pages to harmonize with x-fern-availability

  component:docspriority:p2-medium
  Feature

  fern-api/fern#17760 · Filter by author anthonyh-mgp opened on Sep 16, 2026

• GitHub Releases stalled at 5.23.3 (May 12) while npm has continued publishing for months

  component:clipriority:p2-medium
  Bug

  fern-api/fern#17744 · Filter by author EoinTrial opened on Sep 14, 2026

• Offset pagination ignores default: 0 when the offset parameter is integer/int64 (TS + Python SDK generators)

  fern-api/fern#17724 · Filter by author bekirisgor opened on Sep 12, 2026

• [Java] Stream-upload overloads drop companion multipart form fields

  fern-api/fern#17699 · Filter by author gavinsharp opened on Sep 9, 2026
  1

• Rust generator: 33 behaviours the Postman Rust SDK delivers and the Fern Rust SDK does not (conformance backlog)

  fern-api/fern#17691 · Filter by author iamnamananand996 opened on Sep 8, 2026