Cross-Repository CI Relay (CRCR)

### TL;DR

PyTorch's Cross-Repository CI Relay (CRCR) is an automated system that connects upstream PyTorch events to downstream continuous integration (CI) systems, enabling seamless testing and reporting across repositories. It ensures that changes in the main PyTorch repository are automatically tested in related downstream repositories, providing a unified dashboard for maintainers to monitor both in-tree and cross-repository CI health without requiring custom integrations from downstream projects.

Key Insights & Metrics

Key Features

• Automated dispatch of upstream PyTorch events to downstream repositories
• Unified dashboard for monitoring both in-tree and cross-repository CI health
• Tiered allowlist system supporting incremental onboarding and differentiated access
• Secure and efficient flow of information with multiple validation stages
• Minimal integration burden for downstream repositories
• Provision of valuable metrics like queue time and execution time

Discussion