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Reading / 2026-04/2026-04-30t195531-what-ci-actually-looks-like-at-a-100-person-team

What CI Actually Looks Like at a 100-Person Team

Mendral's AI agent handles CI triage at PostHog's scale — 575K weekly jobs and 33M test executions — by ingesting billions of log lines, tracing flaky tests to root causes, and opening fix PRs automatically.

Apr 30, 2026 · tech · Sam Alba, Mendral Blog

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Topics

  • continuous-integration
  • flaky-tests
  • developer-productivity
  • ai-agents
  • software-engineering

Cited by

  • AI agents

    Autonomous systems that plan, act, and verify across tool calls and multi-step workflows, with active debate over architecture choices, coordination costs, memory design, state management, and the governance infrastructure needed to make them reliable.

  • Continuous integration

    CI pipelines face compounding pressures from scale, flaky tests, merge queue correctness, supply chain attacks, and AI-generated code — each demanding stricter architecture at the point where code enters the main branch.

  • Developer productivity

    Developer productivity spans individual workflow habits, organizational systems, and AI tooling — and the sources collectively argue that output speed is the least reliable measure of it.

  • Flaky tests

    Flaky tests fail intermittently without code changes, and eliminating them requires tracing root causes across environment inconsistencies, brittle selectors, AI-generated anti-patterns, and test coupling to implementation details.

  • Software engineering

    Software engineering spans craft, process, and judgment — how code is structured, tested, reviewed, deployed, and maintained — and the sources collected here collectively interrogate each layer as AI tooling reshapes who does what and why.

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