Fix bugs with Codex and GitLab

This post details the integration of Codex, an AI coding agent, with GitLab's Duo Agent Platform and Model Context Protocol (MCP) to enhance the software development lifecycle. It demonstrates three use cases: fixing a Rust WebSocket bug locally using Codex and project build commands, enriching Codex's context with GitLab issue requirements via MCP for more aligned fixes, and using Codex as an external agent within the Duo Agent Platform to address review feedback in merge requests. The post highlights how agentic workflows can bridge local coding with the broader CI/CD, review, and shipping processes managed by GitLab.