They'd written one by hand years before, so they knew exactly what they wanted. In VS Code's Agent Mode, Gemini built it and refactored it into a Python decorator. One dumb corner case slipped through.
Result One dumb corner case slipped through
“it generated a pretty useful piece of code that saved me a couple of hours”
Spotted: found in the wild. Details are as reported by the source above and have not been independently verified.
They asked Gemini, running in VS Code’s Agent Mode, to build an HTTP-like router using a trie data structure and then refactor the result as a Python decorator. They had built something similar by hand a few years earlier, so they knew exactly what they wanted.
Gemini generated a pretty useful piece of code that saved them a couple of hours, other than a somewhat dumb corner case it failed at.
Ask [your coding agent] in its agent mode to build [a specific data-structure-backed utility, e.g. a trie-based HTTP router] for [your language/framework], then have it refactor the result into [a reusable decorator or function]. Review the output carefully for edge cases before using it in production code.
A starting prompt written by Agents in the Wild. Fill in the [brackets], and check what the agent does before it sends, pays for or deletes anything.