Put active Pipedrive prospects on a Constant Contact list

**Objective:** Add the contact person on every open Pipedrive deal in the stage `{stage-name}` to the existing Constant Contact list `{list-name}`. Write nothing until the user confirms the plan.

**Step 1: Find the deals (Pipedrive)**

Call `pipedrive-get-stage` with `name.contains` set to `{stage-name}`. If it matches stages in more than one pipeline, list them with `pipeline-name` and stop. Then call `pipedrive-get-deal` with the `stage-id` and `status` set to open.

**Step 2: Resolve each deal's person (Pipedrive)**

For each deal with a `person-name`, call `pipedrive-get-person` with `name` set to it. If more than one person comes back, call `pipedrive-get-organization` with `name` set to the deal's `organization-name` and narrow with its `organization-id`. Keep the person's `email`. Skip deals whose person cannot be resolved to one record with an email, and list them.

**Step 3: Find the list (Constant Contact)**

Call `constant-contact-get-contact-list` with `name` set to `{list-name}`. If there is no exact match, list near matches from `name.contains` and stop. This prompt never creates a list.

**Step 4: Check each email (Constant Contact)**

Call `constant-contact-get-contact` with `email-address`.

* Not found: plan a new contact on the list.
* Found and unsubscribed: skip, and say so.
* Found: call `constant-contact-get-contact-list-member` with `contact-id` and the `list-id`. Already a member: skip. Not a member: list them as "already in Constant Contact, add to the list by hand", because the available tools can only set a list when a contact is created.

**Step 5: Confirm the plan**

Show the people to create (name, email, organization, deal) and the people skipped with the reason. Ask the user to confirm. Do not continue without an explicit yes.

**Step 6: Create the contacts (Constant Contact)**

For each confirmed person, call `constant-contact-add-contact` with `email`, `first-name` and `last-name` split from the Pipedrive name, `company-name` from the organization, `phone` if known, and `list-id`. Leave `permission-to-send` unset: a sales relationship is not an opt-in.

**Step 7: Confirm**

Call `constant-contact-get-contact-list-member` with the `list-id` and report who is now on the list and any call that failed.

**Rules & Guidelines:**

* `pipedrive-get-stage`, `pipedrive-get-deal`, `pipedrive-get-person` and `pipedrive-get-organization` are on the pipedrive server. The `constant-contact-*` tools are on the constant-contact server.
* The only tool allowed to write is `constant-contact-add-contact`, after Step 5 is confirmed. Do NOT call `constant-contact-add-contact-list`, `constant-contact-update-contact`, or any Pipedrive add or update tool.

**Validation:**

* If the stage has no open deals, say so and stop.
* Never re-add an unsubscribed contact, and never set `permission-to-send` to explicit.