Code Reviewing AI-Generated JavaScript: What I Found – Schalk Neethling – Open Web Engineer
January 20, 2026
I recently had an AI agent build a JavaScript utility for calculating road distances using a third-party API. The task was complex: batch multiple API requests, validate inputs and outputs, handle errors gracefully, and manage timeouts. The agent delivered working code that passed its own tests.
The code worked, but several issues ranged from minor inefficiencies to a critical bug that would break production. Here’s what I found and how we fixed each one.
I think this is worth a read, despite being very light on some details such as which model and harness was used.
Part II, where he’ll look at the commonalities here and techniques for catching these issues during the development process, may well end up being more valuable. I look forward to seeing that.
