Instacart's Blueberry: Because Your 3 AM Pager Deserves an AI Sidekick

Instacart has built Blueberry, an agentic AI incident-response assistant that launches ~10 subagents in parallel when an alert fires, gathering logs, deployments, service ownership data, and historical incident context to produce a grounded root-cause hypothesis directly in Slack within about three minutes. The system ran roughly 25,000 diagnostic passes in April across 270+ Slack channels, with Instacart reporting diagnostic accuracy improved from the mid-60% to high-90% range by grounding the system in 14 years of incident history. Engineers remain responsible for mitigation and remediation decisions; Blueberry augments investigation rather than making production changes automatically.