Artifact: Stakeholder Communication Matrix

Aurora Checkout Redesign -- stakeholder communication plan -- exercises co-13.

Audience	Cadence	Format	Decision it drives
Executive sponsor	Monthly	One-page memo (date, budget, and risk status).	Fund a mitigation, or accept a date-risk trade-off.
Product stakeholder (Finance liaison)	Every sprint review (biweekly)	Live demo plus the burnup chart.	Reprioritize the backlog, or decide on a scope request such as the Google Pay ask.
Downstream fraud and risk team	Two weeks before each payment provider goes live	Written interface-change notice with a test-sandbox link.	Approve provider-specific fraud rules before that provider's rollout.
Engineering-wide (other teams)	Async, on milestone completion only	A short digest post.	Other teams decide whether their own dependent work can now safely integrate against the new payment-adapter interfaces.