Ready a WooCommerce win-back offer for subscribed Mailchimp contacts

**Objective:** Find WooCommerce customers whose last order was more than `{inactive-days}` days ago (default 180) and who are still subscribed in Mailchimp, then, after confirmation, create one `{discount-percent}` percent WooCommerce coupon (default 15) and add those contacts to the Mailchimp tag `{tag}` so a campaign can send them the code.

**Step 1: Find the tag**

Call `mailchimp-get-segment` with `name` set to `{tag}` and `type` set to static. If none or more than one comes back, list what was found and stop; this prompt does not create tags. Note `segment-id` and `list-id`.

**Step 2: Find lapsed customers in WooCommerce**

Work out the cutoff date as today minus `{inactive-days}` days. Call `woocommerce-get-customer` with `paying-customer` set to true. For each, call `woocommerce-get-order` with `customer-email` and keep the customer only if no order that is not cancelled or failed has a `created-date` after the cutoff. Record the last order date, order count and lifetime total.

**Step 3: Check they can be reached in Mailchimp**

For each lapsed customer, call `mailchimp-get-list-member` with `email`. Keep only contacts whose `status` is subscribed in the audience whose `list-id` matches the tag's. Report the rest as unreachable with their status.

**Step 4: Plan and confirm**

Propose a coupon code such as WINBACK followed by the percent and the current month, and call `woocommerce-get-coupon` with `code` set to it to check it is unused; if taken, add a suffix and check again. Show the code, discount, an expiry 30 days from today, usage limit per user of 1, and the contacts to tag (email, last order date, lifetime total). Wait for an explicit yes.

**Step 5: Create the coupon and tag the contacts**

Call `woocommerce-add-coupon` once with `code`, `discount-type` percent, `amount` set to `{discount-percent}`, `expiry-date`, `usage-limit-per-user` 1, `individual-use` true and a `description` naming this win-back. If it fails, stop before tagging anyone. Then call `mailchimp-add-segment-member` once per confirmed contact with `segment-id`, `list-id` and `email-address`.

**Step 6: Report**

The coupon code and expiry, counts tagged, unreachable and failed, and the next step for the user: send a Mailchimp campaign to the `{tag}` tag containing the code.

**Rules & Guidelines:**

* `woocommerce-get-customer`, `woocommerce-get-order`, `woocommerce-get-coupon` and `woocommerce-add-coupon` are on the woocommerce server. `mailchimp-get-segment`, `mailchimp-get-list-member` and `mailchimp-add-segment-member` are on the mailchimp server.
* The only write tools this prompt may call are `woocommerce-add-coupon` (once) and `mailchimp-add-segment-member` (once per contact), both after Step 4. Never call `mailchimp-add-list-member` or `mailchimp-update-list-member` to reach someone who is not subscribed, and do not call `mailchimp-replicate-campaign` or `mailchimp-start-automation`.

**Validation:**

* Match on email, compared case-insensitively.
* `{discount-percent}` must be a number between 1 and 100. Otherwise stop and ask.
* If no lapsed, subscribed customers are found, say so and stop without creating a coupon.