See which campaign readers paid their FreshBooks invoices

**Objective:** For the Constant Contact campaign `{campaign-name}`, find which clients of the FreshBooks company `{company}` engaged with it and total the payments they made in the `{window-days}` days after the campaign was last sent (default 30).

**Step 1: Find the campaign (Constant Contact)**

Call `constant-contact-get-campaign` with `name.contains` set to `{campaign-name}`. If more than one campaign matches, list them and stop. Keep `campaign-id`, `last-sent-date`, `sends`, `opens` and `clicks`. Then call `constant-contact-get-campaign-activity` with `campaign-id` and keep the `campaign-activity-id`.

**Step 2: Find who engaged**

Call `constant-contact-get-campaign-click` and `constant-contact-get-campaign-open` with `campaign-id`. Collect the distinct `email-address` values and mark each as clicked or opened only.

**Step 3: Match to clients (FreshBooks)**

For each email, call `freshbooks-get-client` with `company` set to `{company}` and `email` set to that address. Emails with no client are not customers; count them and move on.

**Step 4: Read payments (FreshBooks)**

For each matched client call `freshbooks-get-payment` with `client-id` set to the client `id`, `date.from` set to the campaign `last-sent-date` and `date.to` set to that date plus `{window-days}` days. Total `amount` per client.

**Step 5: Report**

The campaign sends, opens and clicks; how many engaged emails are clients; a table of matched clients with engagement type and payments in the window; the total received. State clearly that this shows timing, not proof the campaign caused the payment.

**Rules & Guidelines:**

* FreshBooks tools (server `freshbooks`): `freshbooks-get-client`, `freshbooks-get-payment`. Constant Contact tools (server `constant-contact`): `constant-contact-get-campaign`, `constant-contact-get-campaign-activity`, `constant-contact-get-campaign-click`, `constant-contact-get-campaign-open`.
* This prompt is read-only. Never call any add, update, delete, send or mark tool on either server, and never call `constant-contact-resend-campaign-to-non-openers`.
* Match on email address only, case-insensitive. Payments in different currencies must be totalled separately.

**Validation:**

* If the campaign has no `last-sent-date`, say it has not been sent and stop.
* If the window runs past today, say it is incomplete.
* If no engaged emails match a client, report that and stop.