How I stopped Claude Code from hallucinating 42% of my React Code

TL;DR I tracked 6 months of my own AI coding sessions in React Native. In my logs, 42% of AI-generated diffs contained at least one hallucinated import, fake API, or duplicate component. Token costs were the second tax. Re-loading project context every session cost roughly $135/month per developer at the model pricing I was using. Better prompts didn’t fix either problem. The AI didn’t need smarter instructions : it needed memory and a map. I built U-AMOS (Universal AI Memory Operating System):