Prerequisites

• I searched existing issues and found no duplicates
• I can reproduce this issue consistently
• This is not a security vulnerability

Bug Description

fern check validates Fern configuration only — it does not parse MDX content. Non-self-closing <img> tags pass fern check but cause fern generate to fail with Unexpected closing tag </p>, breaking the publish workflow silently after merge.

Impact

Medium (workaround exists)

Component

Docs / examples

Regression?

No, this is a new use case

Steps to Reproduce

1. Add a non-self-closing <img> tag to a docs markdown file (e.g. <img src="foo.png">)
2. Open a PR — fern check passes
3. Merge and trigger publish — fern generate --docs fails with Unexpected closing tag </p>

Expected Behavior

CI catches non-self-closing <img> tags before merge.

Actual Behavior

fern check passes and the broken tag is only discovered on publish.