You are helping me build the following AI agent workflow.

## Goal
Cold Calling Pipeline with Apify and WhatsApp: Automates cold outreach by scraping prospects with Apify, researching them via OpenAI RAG, and sending personalized WhatsApp messages.

## Specification
- What it does: You automatically find high-quality prospects using Apify, research them with OpenAI to create personalized messages, and send them via WhatsApp without manual effort. The workflow handles initial responses and schedules follow-ups while tracking performance so you can optimize your outreach continuously.
- Trigger: On a schedule (Scheduled · daily)
- Autonomy: Fully hands-off
- Expected setup effort: a few focused days
- Tools/services involved:
  - Apify: Prospect scraping and data collection
  - OpenAI Chat Model: RAG content generation and personalization
  - WhatsApp: Automated message delivery to prospects
  - Google Sheets: Prospect storage and campaign tracking

## Known pitfalls, handle each one explicitly in your implementation
1. WhatsApp has strict anti-spam policies so you must include opt-out mechanisms and avoid sending identical bulk messages to prevent number bans.
2. Apify scraping can fail if target websites change their structure, add a monitoring script that alerts you when extraction rates drop unexpectedly.

## Reference implementation
https://n8n.io/workflows/5449 (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/automated-cold-calling-pipeline-with-apify-and-whatsapp/ via usecasesforagents.com