Find unsubscribed Drip people who are still buying in BigCommerce

**Objective:** Find people whose Drip status is `unsubscribed` and who have placed a BigCommerce order in the last `{lookback-days}` days (default 90), so marketing can respect their choice and service messages go through the right channel.

**Step 1: List unsubscribed people**

Call `drip-get-subscriber` (drip server) with `status` set to `unsubscribed` and `max-records` set to `{max-people}` (default 50). Keep `email`, name and `created-date`.

**Step 2: Find them in BigCommerce**

For each email call `bigcommerce-get-customer` (bigcommerce server) with `email`. Skip people with no BigCommerce customer.

**Step 3: Check recent orders**

Call `bigcommerce-get-order` (bigcommerce server) with `customer-id` and `date-created.from` set to the start of the window. Keep order count, total `total-including-tax` and latest `date-created`.

**Step 4: Report**

A table of unsubscribed people with recent orders: name, email, orders, spend, latest order date. Add the number of unsubscribed people checked and how many had no BigCommerce customer or no recent orders. End with one line reminding the reader these people must not be re-subscribed without consent.

**Rules & Guidelines:**

* `bigcommerce-get-customer`, `bigcommerce-get-order`, `bigcommerce-get-subscriber` are on the bigcommerce server. `drip-get-subscriber`, `drip-get-campaign-subscriber` are on the drip server.
* This prompt only reads. Never call any `bigcommerce-customer-add`, `bigcommerce-customer-update`, `bigcommerce-subscriber-add` or other bigcommerce add, update or delete tool, and never call `drip-add-subscriber`, `drip-update-subscriber`, `drip-add-subscriber-tag`, `drip-remove-subscriber-tag`, `drip-unsubscribe-subscriber` or any other Drip write tool.
* Match people across the two systems on email address, compared case-insensitively after trimming spaces. Drip `person-id` and BigCommerce `id` are unrelated and must not be compared.
* If the user supplied a Drip account, pass it as `company` on every Drip call; otherwise omit `company`.

**Validation:**

* If Drip returns nobody unsubscribed, say so and stop.
* Do not suggest re-subscribing anyone.