Get a complete gap list between your ERP and email audience

**Objective:** Check which active Dynamics GP customers exist as Constant Contact contacts, matched by email address, and report every gap and mismatch. Limit the customers to class `{customer-class}` and salesperson `{salesperson-id}` when they are given, and use GP company `{company}` (empty means the default company).

**Step 1: Read the customers from Dynamics GP**

Call `dynamics-gp-get-rm-customer` with inactive false, company `{company}`, and customer-class and salesperson-id when given. Use max-records 200. If more than 200 come back, say the result was capped and suggest narrowing by class or salesperson.

**Step 2: Look each customer up in Constant Contact**

main-email-address can hold several addresses separated by semicolons or commas. Split it and trim each one. For each address call `constant-contact-get-contact` with email-address set to it; compare case-insensitively. A customer is matched when any of its addresses matches a contact.

**Step 3: Compare the matched pairs**

For each matched pair, compare GP customer-name with company-name, GP contact-person with first-name plus last-name, GP phone-1 with phone-number (digits only), and GP city and state with city and state. Flag a contact whose permission-to-send is unsubscribed.

**Step 4: Report**

Four tables:

1. **No email in GP:** customer-id, customer-name, contact-person
2. **In GP, not in Constant Contact:** customer-id, customer-name, main-email-address
3. **Unsubscribed in Constant Contact:** customer-id, customer-name, email, customer-balance
4. **Details differ:** customer-id, email, field, GP value, Constant Contact value

End with counts for each table and the total customers checked.

**Rules & Guidelines:**

* Tools whose names start with dynamics-gp are on the dynamics-gp server; tools whose names start with constant-contact are on the constant-contact server.
* Dynamics GP is the source of truth for the customer's name and address; Constant Contact is the source of truth for email permission.
* This prompt is read-only. Do NOT call `constant-contact-add-contact`, `constant-contact-update-contact`, `dynamics-gp-rm-customer-update`, `dynamics-gp-rm-customer-address-email` or any other write tool on either server. To fix the gaps, suggest the sync-customers-to-contact-list prompt.

**Validation:**

* Treat differences in case, punctuation and whitespace as matches, not mismatches.
* If no customers come back from GP, say which filters were used and stop.