LangGraph, inspired by AlphaCodium and Reflexion, is a tool designed to enhance code generation through a flow paradigm rather than a simple prompt-response model. By testing and reflecting on code outputs, LangGraph aims to iteratively improve solutions, as demonstrated in an evaluation involving LangChain Expression Language (LCEL) documentation. The study compared two architectures: one using basic context stuffing for code generation and the other incorporating LangGraph for error checking and reflection. Results showed that the LangGraph-enhanced method achieved a significant improvement in code execution performance, with a 47% increase over the baseline approach. This improvement was attributed to LangGraph's ability to implement cycles and decision points that allowed for error detection and iterative refinement of code solutions. The success of LangGraph suggests its potential applicability to other codebases, reinforcing the importance of structured flow engineering in enhancing the capabilities of code generation systems.