Agentic Coding Is Straining CI. Here's How We Scaled Test Impact Analysis at Anthropic
Claude 1 month ago 4 ● 2 sources
Anthropic engineers scaled their deterministic test impact analysis service after agent-driven CI growth caused the test-result listener to fall behind and make the selector use stale data. CI jobs rose 25x over six months, forcing multiple emergency patches that bought 70 days, then 29 days, then under 1 day. They redesigned the system to use an in-memory database with stateless, horizontally scalable listener workers and a separate consumer to roll up per-test history, stabilizing it after a three-week rebuild.