Kiro explains how 3 engineers and agents keep 1,000 PRs a week stable with 80+ automated checks
rseroter · x · 2026-10-28
Kiro's engineering blog follows up on its "3 engineers + agents merged 1,000 PRs in a week" feat by explaining how quality holds at that speed.
- Key reframe: "how can a human be responsible for AI-written code?" becomes how do we build automated tests and checks strong enough to trust more than our own reading? Humans can't read every change, but a pipeline tests all of them, every time, the same way.
- Historical context: even before AI, manual review was necessary but not sufficient — confidence came from automated tests plus human verification in real/simulated environments; humans only try happy paths and obvious edge cases.
- Concrete system: 80+ checks collapse into a single "PR Readiness" verdict that humans and agents read alike; unified blocking bars for reviewers (Design / First principles / UX / dual-model code review) and tests (unit, integration, frontend, E2E, bundle size coverage); one definition of done serves both the human merge decision and the agent loop's next fix.
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