Changelog

Admins can now bound the Fern CLI version that every project in an organization runs. Set a minimum, a maximum, or an exact version with fern org set cli-version, and each project runs the nearest allowed version. The bounds live on the organization, so no fern.config.json has to change. fern org get reports the policy and fern org unset cli-version clears it. fern upgrade respects the same bounds when it writes a new version.

Rendering availability badges (Beta, Deprecated, etc.) as a badge in the sidebar navigation is now opt-in rather than automatic. Set layout.show-nav-availability-badges: true in docs.yml to enable it for your site; it’s off by default.

You can now surface pages hosted outside your docs site in search. List one or more external sitemap.xml files under the experimental external-sitemaps key in docs.yml, and Fern indexes their pages into the same search index as your documentation. External results are flagged as third-party, so they always rank below your first-party pages and open in a new tab when selected.

Teams can now preview a role-gated docs site as a specific viewer to validate their gating before publishing. On a preview link, a role selector lets you pick one or more roles (or anonymous) and re-renders the site with that viewer’s role-based visibility applied, including nav pruning, <If /> blocks, and role-gated tabs and products. With no selection, the preview continues to show all content.

You can now gate content by role when authenticating with SSO. Fern reads each user’s roles from the token your identity provider issues, then applies the roles and viewers rules in your docs.yml. Previously, role-based access control was limited to JWT and OAuth.

To use it, assign roles through your WorkOS organization, either directly or by mapping your SSO/directory groups to roles.

Fern adds a Subresource Integrity (SRI) integrity attribute to remote js scripts by default. You can now disable SRI on a specific remote script without turning it off globally. Disable it for scripts that update in place, such as auto-updating or CDN-rolled scripts, which SRI would otherwise block.

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js:
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  - url: https://cdn.example.com/a.js
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    disable-sri: true # rendered without an integrity attribute
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  - url: https://cdn.example.com/b.js # still gets SRI (default)

Ask Fern can now mask personally identifiable information in a user’s question. When enabled, structured PII (emails, phone numbers, SSNs, and credit card numbers) is redacted in the browser and never sent to Fern.

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ai-search:
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  mask-pii: true

You can now create and edit <Tooltip> components in the Fern Editor. Select existing text to wrap it in a tooltip, or use the /tooltips slash command to insert a new one.

Availability set on a page, section, folder, or API Reference section or endpoint now automatically shows as a badge in the sidebar navigation, so you no longer need to hardcode a status like “(Beta)” in the title. beta, pre-release, and in-development render a badge; deprecated renders a badge and strikes through the title.

对不存在的 .md URL 的请求现在会返回最多三个链接到最接近匹配来源的”相似页面”建议，使 agent 无需单独查找即可从损坏的链接中恢复。

更新日志现在支持两种布局：

• timeline（默认）渲染可搜索的精简条目卡片时间线。
• classic 渲染内联堆叠的完整条目，保留代码格式、复制按钮和链接。

在 docs.yml 中通过 layout.changelog-layout 设置站点范围的值：

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layout:
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  changelog-layout: classic

现在可以通过在 docs.yml 中设置 page-actions.options.mcp: false 来完全禁用文档站点上的 MCP 服务器。禁用后，/_mcp/server 端点返回 404，MCP URL 从 llms.txt 和代理提示中移除，“Connect to Claude Code”/“Connect to Cursor”按钮也会隐藏。

这对于已认证的文档站点尤其有用，因为未认证的 AI 代理可能会发现端点但无法使用它。

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page-actions:
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  options:
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    mcp: false

更新日志页面现在渲染为紧凑的、按日期分组的条目卡片时间线，取代了之前将完整高度条目内联堆叠的布局。

顶部的搜索栏可按关键词搜索整个更新日志的条目。查询同步到 ?q= URL 参数，因此过滤后的视图可以分享。

包含多个发布的更新日志条目可以使用 <ChangelogTags> 组件为每个标题独立添加标签：

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## New dashboard analytics
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<ChangelogTags>analytics, dashboard</ChangelogTags>

单个条目页面上的标签可点击，点击后链接回时间线并预选该标签作为过滤器。

You can now generate library documentation from local source code using the --local flag. Instead of pushing to a remote repository and parsing on Fern’s servers, fern docs md generate --local parses the source locally. This doesn’t require you to be logged in to Fern.

To use local generation, set your library’s input to a path instead of a git URL:

Fern no longer generates llms-full.txt, and the llms-full-txt configuration in docs.yml is deprecated. Concatenating an entire site into one file exceeded most model context windows, added heavy serving overhead, and saw little use next to llms.txt combined with per-page Markdown.

Use llms.txt to discover page URLs and fetch individual pages via their .md URLs.

The /.well-known/api-catalog endpoint now mirrors what the viewer can see. Sites with authentication configured return an empty catalog to unauthenticated requests, and API references hidden through role-based access control no longer appear in the catalog.

You can now install the fern-docs agent skill to teach coding agents like Claude Code, Cursor, and Copilot how to work with Fern Docs. The skill covers docs.yml configuration, navigation, MDX pages, components, and changelog entries, with task-specific references that agents load on demand.

$
npx skills add fern-api/skills --skill fern-docs

Fern docs sites can now serve author-supplied Agent Skills at the standard /.well-known/skills/ and /.well-known/agent-skills/ endpoints. Place your skill bundle under fern/.well-known/agent-skills/ and the CLI uploads it during fern generate --docs. Users install with npx skills add https://<your-domain>.

You can now add an “Install skills” button to the page action bar via page-actions.options.skills in docs.yml. The button opens a modal showing a copyable install command, the list of available skills, and a link to the skill source. The modal fetches the site’s served well-known manifest on first open, so the skill list stays in sync with what npx skills add installs.