I Spent 10x Longer Debugging AI Code Than Writing It — Here's What Changed

Everyone talks about AI speeding up coding. Nobody talks about debugging AI-generated code. Last month, I spent three hours hunting down a bug in a 20-line function that an LLM wrote in thirty seconds. That's not a productivity gain—that's a productivity swap. You trade typing speed for debugging speed, and most of the time the trade is terrible. I've been using AI assistants for about a year now, mostly Claude and GPT-4, and I've noticed a pattern. The first version of any moderately complex piece of code always has at least one subtle mistake. Not syntax errors—those are easy. I'm talking about logical off-by-ones, missing edge cases, or completely hallucinated API calls. And the worst part? The AI writes the code with such confidence that you assume it's correct. You run it, it crashes, and you spend ten minutes thinking you misused the function before you finally look at the generated code with a suspicious eye. Let me show you a concrete example. I was building a small Node.js service that fetches data from a paginated REST API and merges the results. I asked the AI to write a function that handles pagination with a while loop and an offset parameter. Here's what it gave me: async function fetchAllPages ( baseUrl , limit = 100 ) { let offset = 0 ; let allData = []; let hasMore = true ; while ( hasMore ) { const response = await fetch ( ` ${ baseUrl } ?limit= ${ limit } &offset= ${ offset } ` ); const data = await response . json (); allData = allData . concat ( data . results ); hasMore = data . results . length === limit ; offset += limit ; } return allData ; } Looks clean, right? I pasted it in, ran my test, and got an infinite loop. The server returned a 400 error after a few requests, but the function kept going because response.ok was never checked. The AI assumed every call succeeds. I spent forty-five minutes debugging that—not because the bug was hard, but because I trusted the output. I added a try/catch and a status check, and then I found the real is