You are helping me build the following AI agent workflow.

## Goal
Website Chatbot with Knowledge Base: Answers visitor questions in real time by retrieving context from Google Drive documents via a vector store.

## Specification
- What it does: You get instant answers to visitor questions by having your Google Drive documents automatically converted into a searchable knowledge base. The agent retrieves relevant information in real time to provide accurate, brand-aligned responses without you needing to manually search files.
- Trigger: Triggered by an event (Event · on chat message or manual update)
- Autonomy: Fully hands-off
- Expected setup effort: a few focused days
- Tools/services involved:
  - HTTP Request: Webhook integration and API calls
  - Google Drive: Document ingestion source
  - Embeddings Mistral Cloud: OCR and vector embeddings generation
  - Qdrant Vector Store: Storing and retrieving knowledge base vectors
  - OpenAI Chat Model: Generating chatbot responses

## Known pitfalls, handle each one explicitly in your implementation
1. OCR accuracy varies with image quality so you should implement a confidence score check and flag low-quality scans for manual review.
2. Vector store drift can occur as new files are added so schedule regular re-indexing jobs to keep the knowledge base current.
3. Context window limits may truncate important information so prioritize retrieving the most relevant chunks by adjusting top_k parameters.

## Reference implementation
https://n8n.io/workflows/10142 (workflow template)
Fetch and inspect this before building. If it matches my stack, adapt it;
if not, rebuild the pattern with my tools.

## Process requirements
1. Before building: ask me which of the listed tools I actually use and
   what my platform is (n8n / Make / code / other). Do not assume.
2. Adapt the pattern to my answers; do not force the reference stack.
3. Address every pitfall above; tell me how you handled each.
4. Provide a test plan I can run before letting this touch real data.
5. Ask before any step that sends messages, modifies data, or spends money.

Source: https://usecasesforagents.com/use-case/website-chatbot-with-knowledge-base/ via usecasesforagents.com