AI can write code in an hour, but reviewing it still takes half a day

At a glance

At Japanese large companies, an AI coding tool turns a functional spec into implementation and test code in about an hour. Reviewing and fixing that output still takes more than half a day.

Key points

1. 1

   The AI quickly drafts the implementation and unit tests (automatic code checks) from the spec.

2. 2

   The AI sometimes assumed access it did not have or changed parts of the project that were not needed.

3. 3

   If the spec itself is wrong, the code and tests can both be wrong, so people must check the source document separately.

4. 4

   So the author now pays more attention to what files the AI reads and how far its task reaches.

Why it matters

The faster AI writes code, the more important it becomes for people to judge whether the results are correct.