snippet ``` "code section"
```${1:language}
$0
```
endsnippet

snippet [] "url link"
[$1]($2)$0
endsnippet

snippet ! "image link"
![${1:alt}](${2:src}${3: "${4:title}"})
endsnippet

snippet --- "frontmatter" b
---
$0
---
endsnippet