AI Writes Code Faster Than Uber Can Merge It - Preetam Dwivedi & Manjari Akella, Uber

Shows what breaks in CI and merge infrastructure when agents multiply change volume, and the specific queue techniques that kept landing times down.

• Uber's monorepos see more than 5,000 developers land tens of thousands of commits a week, and AI-driven code changes pushed its SubmitQueue merge pipeline to its limits.
• Uber made three SubmitQueue changes: admission gating that sorts cheap changes from expensive ones, a deferral queue that softens the impact on developers, and conflict relaxation that lets more changes run in parallel.
• Uber's Stovepipe checks changes after they land and tracks the last verified-good state of trunk, part of Uber's move from an always-green trunk to a hybrid approach.

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