> For clean Markdown content of this page, append .md to this URL. For the complete documentation index, see https://buildwithfern.com/learn/llms.txt.

## Configure `fern check` rule severity

developer-tools, docs.yml

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.

**`docs.yml`**

```yaml docs.yml
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.

Read the docs

## AI search upgrade

search, ai

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

Read the docs

## Context7 integration

ai, integrations, docs.yml

Host a [Context7](https://context7.com/) 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.

**`docs.yml`**

```yaml docs.yml
integrations:
  context7: ./path/to/context7.json
```

Requires Fern CLI version `4.52.0` or later.

Read the docs