· 3 min read · AI Engineering
AI Coding Assistants Made Review the Bottleneck
Generating code got cheap. Deciding whether the code should exist did not, and that is where the queue moved.
Use AI to shrink the cost of drafts, then spend the savings on smaller pull requests, stronger tests, and review time. Otherwise you have automated the production of unreviewed code.
The queue did not disappear. It moved
When generating code becomes fast, the scarce resource becomes human judgement: reading a change, understanding why it exists, and trusting it in production. Teams feel this as pull requests that arrive faster than anyone can review them, written in a confident style that makes skimming dangerously easy.
Recent industry research keeps landing in the same place: coding activity rises with AI assistance, while delivered output rises much less, with review effort absorbing the difference. That matches what I see in practice. The tool is not the problem. The missing process around it is.
Small diffs are the whole trick
The fix is unfashionable: ask the assistant for less at a time. One function, one behavior change, one test run. A 120-line diff gets a real review. A 1,200-line generated epic gets a tired scroll and a stamp, which is worse than no review because it looks like diligence happened.
Ask for the reasoning before the code. A short plan you can argue with, then the smallest change that follows it. If the generated code surprises you, that is information: the prompt skipped a decision that a human should have made out loud.
“AI can write the code at machine speed. Your team's understanding still moves at human speed, and production runs on the second one.”
Spend the savings where they compound
The honest productivity gain from these tools is not shipping more features per week. It is having time left over for the work that prevents next month's incidents: tests for the ugly edge cases, documentation of the decisions nobody wrote down, and deleting code instead of generating more of it.
Used that way, an assistant is what it should be: a fast pair of hands attached to a slower, accountable brain. Yours.