Changelog

3.77.0

(feat): Add support for bytes request and response body types in the fern export command. Previously, exporting APIs with bytes endpoints would fail with “bytes is not supported”. Now bytes request bodies are exported as application/octet-stream with format: binary, and bytes/fileDownload/text/streaming response bodies are properly converted to their corresponding OpenAPI content types.

3.76.0

(feat): Add support for SSE discriminator context with discriminatorContext field in IR. Supports “data” (default) for discriminators within union data and “protocol” for SSE protocol-level discriminators, such as event.

“data”-context discrimination :

event: message
data: { "type": "completion", "content": "Hello!" }
event: message
data: { "type": "error", message: "Something went wrong!" }

“protocol”-context discrimination (use x-fern-discriminator-context: protocol):

event: completion
data: { "content": "Hello!" }
event: error
data: { "message": "Something went wrong!" }

Example OpenAPI usage:

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SseEvent:
2
  oneOf:
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    - $ref: '#/components/schemas/CompletionEvent'
4
    - $ref: '#/components/schemas/ErrorEvent'
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  discriminator:
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    propertyName: event
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    x-fern-discriminator-context: protocol

3.75.0

(chore): Remove deprecated V1 python-docs navigation item. Use the library navigation item with libraries config instead. See the library docs migration guide for details.