I Built an AI That Finds Your Bugs and Rewrites Your Code to Fix Them.

The author built CodeLens, a Groq-powered (llama-3.3-70b) automated code review tool that detects vulnerabilities like SQL injection, memory leaks, and O(n²) algorithms, then rewrites entire files with fixes. The stack uses React 19, FastAPI, and the Groq API with stateless architecture. A key engineering challenge was forcing the LLM to reliably return valid JSON for machine-parseable analysis results.