See a contact's ARR and email engagement in one view

**Objective:** Build a combined picture of `{email}`: who they are as a Rillet customer (ARR, contracts, credit memos) and how they engage with Mailchimp email over the last `{lookback-days}` days (default 90).

**Step 1: Find the Rillet customer**

Call `rillet-get-customer-emails` (it takes no filters and returns every customer email) and keep the rows whose `email` equals `{email}`. Match emails case-insensitively after trimming spaces. A Rillet customer can have several emails (`email-type`), and one email can appear on more than one Rillet customer: keep every pairing and say so in the report. Collect the `customer-id` and `name` of each match.

If there is no match, say that `{email}` is not a contact on any Rillet customer, skip Step 2, and continue with Step 3.

**Step 2: Pull the Rillet financials**

For each `customer-id` from Step 1:

* Call `rillet-get-arr-waterfall` with `customer-id`. Report the most recent `year-month` row: `arr`, `currency` and `status`, plus the change from the previous month.
* Call `rillet-get-contracts` with `customer-id`. List each contract's `name`, `status`, `start-date`, `end-date` and `total-value`.
* Call `rillet-get-credit-memos` with `customer-id`. Report the count and total of credit memos dated within the lookback window.

**Step 3: Pull the Mailchimp engagement**

* Call `mailchimp-get-list-member` with `email` set to `{email}`. For each audience (`list-name`) report `status`, `average-open-rate`, `average-click-rate`, `rating`, `tags` and `sign-up-date`.
* Call `mailchimp-get-campaign-email-activity` with `email-address` set to `{email}` and `activity-date.from` set to today minus the lookback (YYYY-MM-DD). Count opens, clicks and bounces by `action` and note the most recent `activity-date`.

**Step 4: Report**

1. Identity: email, Rillet customer name(s) and id(s), or "not a Rillet customer".
2. Revenue: current ARR and trend, active contracts with the nearest `end-date`, recent credit memos.
3. Engagement: audiences and status, open and click rates, activity counts and last activity date.
4. One line of interpretation, for example "paying customer, unsubscribed from all audiences" or "high ARR, no opens in 90 days".

**Rules & Guidelines:**

* Tools named mailchimp- come from the mailchimp MCP server; tools named rillet- come from the rillet MCP server. If a tool from either server is missing, stop and say which server is not connected rather than working around it.
* The only key shared by the two systems is the email address. Mailchimp `customer-id` values (e-commerce store customers) are NOT Rillet customer ids; never pass one system's id into the other.
* Read-only. Do not call any Mailchimp tool whose name starts with mailchimp-add-, mailchimp-update-, mailchimp-start-, mailchimp-pause- or mailchimp-replicate-, and do not call any Rillet tool whose name starts with rillet-add-, rillet-update-, rillet-apply-, rillet-unapply-, rillet-record-, rillet-set- or rillet-setup-. In particular never call `mailchimp-add-list-member`, `mailchimp-update-list-member` or `mailchimp-add-segment-member` from this prompt.

**Validation:**

* If `{email}` is not in Mailchimp either, report that it was found in neither system and stop.
* If `{lookback-days}` is empty or not a whole number, use 90.
* If Rillet returns more than one `customer-id` for the email, report each customer separately; do not add their ARR together.