content/code-language

Reports a fenced code block that does not name its language after the opening fence. GitHub, Forgejo, Gitea, and Obsidian highlight code by the language its fence names; name text for plain text.

Problem rule, reported only. Presets: none. Dialects: all. Options: allowedLanguages, languageOnly.

Reported:

```
npm test
```

Not reported:

```sh
npm test
```

Option	Values	Default
allowedLanguages	An array of case-sensitive names	[]
languageOnly	true or false	false

• allowedLanguages: the language names allowed. [] allows any named language; ["js", "ts", "text"] permits only those names. Names are compared after Markdown character references and escapes are decoded, without guessing aliases.
• languageOnly: with true, the opening fence's info string must hold only its language name: no leading or trailing whitespace and no additional metadata.

Both options only report findings; the code and its fence remain as written.

Edge cases and advanced usage

Not checked: indented code blocks, which have no place for a language.