Try the SDK without leaving the docs

// adapter-markdown.ts
import { readdir, readFile } from 'node:fs/promises'
import matter from 'gray-matter'
import { UPGClient } from '@unified-product-graph/sdk'

export async function importMarkdownVault(dir: string, upg: UPGClient) {
  const files = (await readdir(dir)).filter(f => f.endsWith('.md'))
  let imported = 0

  for (const file of files) {
    const raw = await readFile(`${dir}/${file}`, 'utf-8')
    const { data: front, content } = matter(raw)

    const type  = (front.type as string) ?? 'note'
    const title = (front.title as string) ?? file.replace('.md', '')

    await upg.nodes.create({
      type,
      title,
      description: content.slice(0, 500),
      tags:        (front.tags as string[]) ?? [],
    })
    imported++
  }

  const report = await upg.verify()
  const { score } = await upg.health()
  console.log(`imported ${imported} · health ${score}/10`)
  if (report.errors.length) console.warn('with warnings:', report.errors)
}