Vercel Comptability?

[Droppix]

Describe the bug
I am trying to use LLamaIndex with AI SDK Vercel 5 (with LLM GPT OSS, DeepSeek, Gemini, etc.), but I must say that between your documentation and the code, not much matches up and works.

To Reproduce
Code to reproduce the behavior:

const {
    createGateway,
    embed,
    embedMany,
    generateText,
    streamText,
} = require('ai')
const { createOpenAICompatible } = require('@ai-sdk/openai-compatible')
const llamaindex = await import('llamaindex')
const {
    Settings,
    Document,
    VectorStoreIndex,
    storageContextFromDefaults,
    loadIndicesFromStorage,
} = llamaindex
const Vercel = await import('@llamaindex/vercel')
const { llamaindex: llamaindexToolFactory } = Vercel

const embeddingsModule = await import('@llamaindex/huggingface')
const { HuggingFaceEmbedding } = embeddingsModule // si ce chemin est correct selon la 

Settings.embedModel = new HuggingFaceEmbedding({
    modelType: 'intfloat/e5-large-v2',
    hfToken: '....',
})

const openai = createOpenAICompatible({
    baseURL: options.llm.baseURL,
    apiKey: options.llm.apikey,
    compatibility: 'strict',
})
const modelProvider = openai('gpt-oss-120b')

let storageContext

const persistDir = path.resolve('cache')
if (!fs.existsSync(persistDir)) {
    fs.mkdirSync(persistDir, { recursive: true })
}

storageContext = await storageContextFromDefaults({
    persistDir,
})

let index
const files = fs.existsSync(persistDir) ? fs.readdirSync(persistDir) : []
if (files.length) {
    index = await VectorStoreIndex.init({ storageContext })
} else {
    const doc = new Document({ text: "Bla Bla Bla...." , id_: 'transcription-1' })
    index = await VectorStoreIndex.fromDocuments([doc], {
        storageContext,
    })
}

const queryTool = llamaindexToolFactory({
    model: modelProvider,
    index,
})

let fullText = ''
let res = streamText({
    model: modelProvider,
    prompt: 'Suggest a title for this transcription',
    tools: { queryTool },
    onFinish({ response }) {
        console.log('Response:', response.messages) // log the response
    },
})
let fulltext = ''
for await (const text of result.textStream) {
  fullText += text
  process.stdout.write(text)
}

Expected behavior
Indexing is not taken into account.

Screenshots
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Desktop (please complete the following information):

• OS: MAC OS
• NodeJS 22 / AI SDK Vercel 5

Additional context
Add any other context about the problem here.