GitHub Octoverse 2026: Agents Start 40% of PRs

GitHub’s numbers show coding agents moving from optional assistants to the default starting point for a growing share of software work—but higher throughput makes review, testing, and security the real bottlenecks.

• –Agent-started pull requests reached roughly 110 million in September, growing sixfold from March
• –Agent-involved PRs changed multiple files more often than other PRs, increasing review complexity
• –The eightfold commit gap suggests agent-ready repository configuration is becoming a meaningful productivity multiplier
• –GitHub’s detectable-agent metric is a floor, and the observational data does not prove agents improve code quality
• –Teams should invest in CI, security scanning, ownership rules, and smaller reviewable diffs as agent output scales