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Document x-fern-default extension #5176

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devalog merged 9 commits intomainfrom
fern/x-fern-default-docs
Apr 27, 2026
Merged

Document x-fern-default extension #5176
devalog merged 9 commits intomainfrom
fern/x-fern-default-docs

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@fern-api fern-api Bot commented Apr 27, 2026

Adds documentation for the x-fern-default OpenAPI extension, which allows specifying client-side default values for path, header, and query parameters in generated SDKs.

Changes

  • New page: fern/products/api-def/openapi/extensions/default.mdx documenting x-fern-default usage for path parameters, headers, and query parameters
  • Updated extensions overview table in overview.md with a link to the new page
  • Added navigation entry in api-def.yml

Supported in TypeScript, Python, Java, Go, C#, Ruby, and PHP SDKs. Only string and boolean value types are supported.

References: fern-api/fern#14355

Requested by: Fern Support

@fern-api fern-api Bot requested a review from devalog as a code owner April 27, 2026 20:23
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github-actions Bot commented Apr 27, 2026

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fern-api Bot commented Apr 27, 2026

Requested by: devin
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@fern-api fern-api Bot force-pushed the fern/x-fern-default-docs branch from 520fb54 to f5b8cd0 Compare April 27, 2026 21:09
@devalog devalog merged commit d98e11c into main Apr 27, 2026
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@devalog devalog deleted the fern/x-fern-default-docs branch April 27, 2026 21:57
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