Markdown Rules

Below the list of rules supported by Biome, divided by group. Here’s a legend of the emojis:

• The icon indicates that the rule is part of the recommended rules.
• The icon indicates that the rule provides a code action (fix) that is safe to apply.
• The icon indicates that the rule provides a code action (fix) that is unsafe to apply.
• The icon indicates that the rule has been implemented and scheduled for the next release.

nursery

Rule name	Description	Properties
useConsistentHeadingLevel	Enforce that all heading levels are consistent and ordered.
useConsistentUnicodeBom	Require or disallow a Unicode byte order mark at the beginning of a file.
useFencedCodeLanguage	Enforce that fenced code blocks specify a code tag (language).
useSingleTopLevelHeading	Enforce that a Markdown document has a single top-level heading.
useTopLevelHeading	Require Markdown documents to start with a top-level heading.

suspicious

Rule name	Description	Properties
noEmptySource	Disallow empty sources.

Recommended rules

Missing a rule? Help us by contributing to the analyzer or create a rule suggestion here.