I am an Accountant. I Built a Python-to-.NET Compiler with AI. Here's What I Learned.

Everyone is talking about what AI can build. I wanted to find out where it breaks. So I gave it one of the hardest problems in computer science. I asked AI to help me build a compiler — a program that reads code written in one language and translates it into something a machine can actually run. Not a script. Not a shortcut. A real compiler with a full pipeline: Reading the source code Understanding its semantic meaning Checking its logic Generating machine-level instructions Computer science students spend entire semesters on this. Most working developers have never attempted it. I am not a developer. I am an accountant from Lahore. That was the point. ⚠️ What Actually Surprised Me I worked with multiple AI models while building Naja. The differences in how they handle complexity were not subtle. One behaviour I encountered repeatedly — and this was far worse with some models than others — was this: When a test was failing because my compiler produced output that didn't match Python's