```
import fs from 'fs'
import path from 'path'

for (const file of traverse('content/articles')) {
  if (!file.endsWith('.md')) continue

  const dir = file.replace(/\.md$/, '')
  fs.mkdirSync(dir)
  fs.renameSync(file, path.join(dir, path.basename(file)))
}

function traverse(pathname) {
  const stat = fs.statSync(pathname)
  if (stat.isFile()) {
    return [pathname]
  } else if (stat.isDirectory()) {
    return fs
      .readdirSync(pathname)
      .map((v) => traverse(path.join(pathname, v)))
      .flat()
  }
  return []
}
```