How Meta Turned Debugging Into a Product

Meta built DrP, an internal platform that treats debugging and incident investigation as engineered software rather than tribal knowledge. Engineers write 'analyzers' using an SDK — codified investigation workflows that go through code review, CI/CD, and automated backtesting. Analyzers chain across service boundaries in microservices environments, trigger automatically on alerts, and surface structured findings to on-call engineers before they open a single dashboard. The platform now runs 50,000 automated analyses daily across 300 teams, with over 2,000 analyzers in production, reducing mean time to resolve incidents by 20-80%. The core insight is that investigation expertise can be codified into testable, composable software rather than living in runbooks or people's heads.