For AI agents: a documentation index is available at the root level at /llms.txt and /llms-full.txt. Append /llms.txt to any URL for a page-level index, or .md for the markdown version of any page.
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  • Getting started
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      • Overview
      • Customize LLM output
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    • MCP server
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  • Public API
    • GETJWT from Fern API key
    • GETAlgolia search credentials
    • GETCurrent user information
  • Fern Writer API
    • GETGet Fern Writer Install Link
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Changelog

March 30, 2026
March 30, 2026
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March 27, 2026

Tab alignment and placement options

You can now finetune how your tabs look and behave using theme.tabs in docs.yml. Choose between the default underline or bubble style, place tabs in the header or sidebar, and center-align header tabs from a single configuration block.

docs.yml
1theme:
2 tabs:
3 style: bubble
4 alignment: center
5 placement: header

The existing string shorthand (e.g., theme.tabs: bubble) continues to work for simple style changes.

Read the docs