saurabh-oss / gepa-langchain-lab Star 5 Code Issues Pull requests Production-ready boilerplate for building and automatically optimizing LangChain RAG applications. Implements three-layer architecture: Build (LangChain) → Measure (MLflow) → Optimize (GEPA + MEGA). ai optimization rag mlflow groq prompt-engineering langchain llm-optimization gepa mega-workflow Updated Jun 8, 2026 Python