Last week, PostHog's CI ran 575,894 jobs, processed 1.18 billion log lines, and executed 33 million tests. At that volume, even a 99.98% pass rate generates meaningful noise. We're building Mendral, an AI agent that diagnoses CI failures, quarantines flaky tests, and opens PRs with fixes. Here's what we've learned running it on one of the largest public monorepos we've ...