Claude Code vs. Codex: Loops, Graphs, and Harnesses

## Claude Code vs. Codex: Loops, Graphs, and Harnesses This is a casual pair-programming meetup for developers experimenting with Claude Code, Codex, and agentic coding workflows. There is no formal presentation and no fixed curriculum. Bring a laptop, a repository, a side project, or a workflow you want to test. We will work in small groups, compare approaches, debug problems, and share what is working. Possible areas to explore include: * Building iterative coding-agent loops * Comparing Claude Code and Codex on the same task * Designing graph-based agent workflows * Creating reusable coding harnesses * Managing context across large repositories * Running tests and validating agent-generated changes * Using sandboxes, permissions, and approval steps * Coordinating subagents or parallel tasks * Measuring latency, token usage, cost, and completion quality * Debugging failed or incomplete agent runs You do not need to be an expert in either tool. This meetup is for people who want hands-on time to experiment, pair with other developers, and learn through building. Bring something you are working on, or join someone else’s project. Hosted by **Coffee & Code Philadelphia**.