GitLab 18.4 enhances developer productivity and AI collaboration. The GitLab Duo AI Catalog allows teams to create and share custom agents for automating organizational tasks. Agentic Chat provides a seamless interface to interact with these agents, with improved session management and user-selectable LLMs. The GitLab Knowledge Graph, now in beta, maps codebases to enable faster navigation and deeper understanding for both developers and AI. The Fix Failed Pipelines Flow automates pipeline maintenance by prioritizing fixes based on business impact. Governance features like model selection and context exclusion offer fine-grained control over AI usage and data protection. Expanded Model Communication Protocol (MCP) tools enable richer integrations with AI agents. These new features aim to make development smoother, smarter, and more secure, transforming the developer experience through human-AI collaboration. The release is available for GitLab Premium and Ultimate users, with upcoming availability for GitLab Dedicated customers. Developers are encouraged to keep their GitLab instances updated for the latest features and improvements.