Use the churn-prevention Skill.

Improve the cancellation journey for our replenishment subscription using the supplied reasons and unit economics. Design reason selection, one relevant optional offer, clear rejection and cancellation confirmation. Write the supporting cancellation, winback and payment-recovery emails, and calculate modeled revenue separately from shipping charges.

The attached business materials are:
- inputs/brief.json
- inputs/merchant.json

Deliver a complete result.md report that the operations team can read, plus any finished files needed for this task. Keep supporting calculations and evidence with the deliverables. Write the report in English; use the requested target language for customer-facing copy. The business datasets are fictional examples unless the brief explicitly names a live public website.