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The Mythical Agent-Month: I Gave Four Coding Workers One Repository. The Merge Told a Different Story.
AI coding agents can produce four branches at once. But can they deliver one reliable application four times faster? I tested the coordination problem with 72 real Git runs and found a failure that every green checkmark missed.
20 min read1 day ago
Four green checkmarks. One broken product.
You can watch the four coding agents here. One is changing the API one is making the interface one is writing tests and one is changing the database.
All terminals are very busy. All branches look good. Four times you see a success message it feels like the whole engineering team has done their work in the time it takes to have a coffee break!
Then you open the application.
The invoice shows $0.10. The customer was supposed to pay $10.00.
None of the agents made a mistake with the code. None of the files had problems. Git merged the branches without asking anything. The individual tests still worked.. The application is wrong by a hundred times.
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