In March, I attempted to run DevStack on my newly bought mini PC, but something was wrong and I couldn’t get it started. Since then, I poured all my attention into AI‑related studies. During lunch today, OpenStack came up in conversation, and the idea popped into my head: “Why not use a coding agent to make it work, since I’ve already used one for several issues in my WSL environment?” This post is the result.

What is GEPA? GEPA stands for Graph-based Evolutionary Program Adaptation — a DSPy optimizer that automatically improves the prompts/instructions of a multi-module LLM program through evolutionary search. It iteratively mutates module instructions, evaluates the changes, and keeps the best-performing candidates on a Pareto front. What’s Happening in This Run This file captures a GEPA optimization run on a financial news extraction system that classifies M&A (merger/acquisition) articles and extracts structured data from them.