AI now writes 97% of my code. Here's what I learned

A senior engineer at a near-billion-dollar company shares that AI (via Cursor) now writes 97% of their production code, including high-stakes systems like an invoicing platform. The key workflow: use Cursor background agents via Slack, don't watch them work, provide clear context and desired outcomes in prompts, then iterate with code review just like you would with a human engineer. The author dismisses elaborate prompt engineering tricks (Agents.md, plan mode, etc.) as distractions, arguing the fundamentals — speak clearly, give context, iterate — are what actually matter. A cautionary note: long-running agents that make early mistakes can produce thousands of lines of broken code, echoing the failures of waterfall development.