You are helping me build the following AI agent workflow.

## Goal
Sync CRM Contacts With Mailchimp And Pipedrive: Keeps contact records aligned between your CRM and Mailchimp by syncing updates to both platforms automatically.

## Specification
- What it does: Keep your contact records perfectly aligned between Pipedrive and Mailchimp so every change you make automatically updates across both platforms. This workflow handles the synchronization instantly when a contact is created or updated, ensuring your data stays consistent without manual effort.
- Trigger: Triggered by an event (Event · on contact update in CRM)
- Autonomy: Fully hands-off
- Expected setup effort: under an hour
- Tools/services involved:
  - n8n: Workflow orchestration and automation logic
  - Pipedrive: CRM contact management and updates
  - Mailchimp: Email marketing audience synchronization

## Known pitfalls, handle each one explicitly in your implementation
1. Field mismatches will cause silent failures so validate required fields like email address before sending data to Mailchimp.

## Reference implementation
https://n8n.io/workflows/13225 (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/sync-crm-contacts-with-mailchimp-and-pipedrive/ via usecasesforagents.com