March 31, 2026

Configure fern check rule severity

You can now configure the severity of validation rules run by fern check directly in your docs.yml file using the check.rules property. Set individual rules to "warn" (non-blocking) or "error" (blocking) to control which checks fail your build.

check:
  rules:
    broken-links: error
    example-validation: warn

The --broken-links and --strict-broken-links CLI flags are now deprecated in favor of this configuration.

AI search upgrade

Ask Fern now runs on Claude 4.6 Sonnet for faster, more accurate answers.

Context7 integration

Host a Context7 verification file on your Fern docs site. Add integrations.context7 to your docs.yml pointing to your context7.json file, and Fern serves it at /context7.json on your domain.

integrations:
  context7: ./path/to/context7.json

Requires Fern CLI version 4.52.0 or later.