Vercel deployed an AI agent that autonomously reviews and merges 58% of PRs in its largest monorepo without human approval, reducing median merge time from 29 hours to 10.9 hours. The company analyzed PR patterns and found that most human reviews were rubber-stamp approvals with zero substantive feedback. The experiment demonstrates practical patterns for safe agent-driven CI/CD: automating verification through tests while keeping alignment decisions with humans.
Infrastructure
58% of PRs in our largest monorepo merge without human review
Vercel's AI agent autonomously merges 58% of PRs in its largest monorepo, cutting merge time in half—revealing that most human reviews were rubber-stamp approvals rather than substantive gatekeeping.
Tuesday, April 7, 2026 12:00 PM UTC2 MIN READSOURCE: Vercel BlogBY sys://pipeline
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