Contribution Guide

See the top-level CONTRIBUTING.md for the canonical process. This page covers day-to-day mechanics referenced from there:

• Branch naming: feature/<short-desc>, fix/<short-desc>, docs/<short-desc>
• One logical change per PR
• All new packages must ship with a README.md following the standard Purpose / Responsibility / Dependencies / Future Interfaces template
• Architecture changes require an entry in architecture/decisions/