# GitLab 19.3 — GitLab 19.3 release notes - Product: GitLab (https://whatsnew.fyi/product/gitlab) - Vendor: GitLab - Date: 2026-08-20 - Version: 19.3 - Original notes: https://docs.gitlab.com/releases/19/gitlab-19-3-released/ - Permalink: https://whatsnew.fyi/product/gitlab/releases/19.3 What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog. Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'. --- On August 20, 2026, GitLab 19.3 was released with the following features. We are excited to recognize gkepas as this month’s Notable Contributor ! Giannis has made sustained contributions across the G… - **added** — Flow Creator foundational agent in the AI Catalog to create custom flows for the GitLab Duo Agent Platform through plain-language conversation - **added** — GitLab Duo can now resolve merge conflicts by analyzing conflicts, editing files, committing resolution to source branch, and posting summary comment on merge request - **added** — GitLab Duo can resolve review discussions by reading comments, making requested changes on source branch, replying with summary, and resolving threads - **added** — GitLab Duo CLI plugins and plugin marketplaces as an experiment with support for Agent Skills, custom slash commands, and Model Context Protocol servers - **added** — Official gitlab-duo-plugins marketplace with three skills: mr-review, stack-changes, and create-issue - **added** — New GitLab Duo Agentic Chat UI in VS Code as beta with redesigned interface for AI models, agents, slash commands, and tool approvals - **added** — New MCP tools get_merge_request and list_merge_requests to retrieve and search merge requests with filtering by author, assignee, reviewer, state, labels, or free-text query - **added** — Pre-register MCP OAuth applications with mcp scope directly from the Admin area to avoid Dynamic Client Registration rate limits - **added** — Ability to see which user authorized each MCP OAuth application Help us learn about your current experience with the documentation. Take the survey. #### GitLab 19.3 release notes On August 20, 2026, GitLab 19.3 was released with the following features. We are excited to recognize gkepas as this month’s Notable Contributor! Giannis has made sustained contributions across the GitLab codebase, the contributor platform, client-go, the Terraform provider, and GitLab Orbit. He is also an active translator and a member of the GitLab Community Discord. ##### Primary features ###### Flow Creator foundational agent - Tier: Premium, Ultimate - Offering: GitLab.com, GitLab Self-Managed, GitLab Dedicated - Links: Documentation · Related Issue You can now use the Flow Creator, a purpose-built foundational agent in the AI Catalog, to create custom flows for the GitLab Duo Agent Platform through a plain-language conversation. With the Flow Creator, you describe what you want the flow to do, and the agent produces a complete, runnable flow YAML you can register and use immediately. The agent can also help you debug existing flows and explain framework concepts. ##### Agentic Core ###### Resolve merge conflicts with GitLab Duo is generally available - Tier: Premium, Ultimate - Offering: GitLab.com, GitLab Self-Managed, GitLab Dedicated - Links: Documentation · Related Issue In previous versions of GitLab, you had to resolve merge conflicts manually in the GitLab UI or from the command line, even for straightforward cases. Now you can ask GitLab Duo to resolve conflicts for you. Start conflict resolution from the merge widget or the Resolve conflicts page. GitLab Duo analyzes the conflicts, edits the files and commits the resolution to the source branch, and then posts a summary comment on the merge request describing what changed. ###### Resolve review discussions with GitLab Duo is generally available - Tier: Premium, Ultimate - Offering: GitLab.com, GitLab Self-Managed, GitLab Dedicated - Links: Documentation · Related Issue In previous versions of GitLab, to resolve a code review comment, you had to switch to your editor, implement the fix, commit and push the change, and then manually close the thread. Now you can select Resolve with GitLab Duo and GitLab Duo will address the review discussion for you. GitLab Duo reads the comment and the surrounding code, makes the requested change on the source branch, replies to the discussion with a summary of what changed, and then resolves the thread. If the change does not address the comment correctly, you or the reviewer can reopen the thread. ###### GitLab Duo CLI plugins and marketplaces (Experiment) - Tier: Premium, Ultimate - Offering: GitLab.com, GitLab Self-Managed, GitLab Dedicated - Links: Documentation · Related Issue GitLab Duo CLI now supports plugins and plugin marketplaces as an experiment, introduced in GitLab Duo CLI 9.10.0. A plugin bundles Agent Skills, custom slash commands, and Model Context Protocol (MCP) servers into a single directory. A marketplace is a catalog of available plugins, hosted in a Git repository or a local directory. GitLab Duo CLI automatically registers the official gitlab-duo-plugins marketplace the first time you use plugins. The marketplace includes three skills for common GitLab workflows: - mr-review: Reviews a merge request and posts comments. - stack-changes: Splits a large local change into a stacked merge request chain. - create-issue: Drafts a GitLab issue from a natural-language description. To install one of the skills, run glab duo cli plugin install @gitlab-duo-plugins or duo plugin install @gitlab-duo-plugins, based on your setup. For compatibility with the existing community plugin ecosystem, GitLab Duo CLI also reads .claude-plugin/marketplace.json files, so existing Claude Code plugin marketplaces work with GitLab Duo CLI without modification. ###### New GitLab Duo Agentic Chat UI in VS Code (Beta) - Tier: Premium, Ultimate - Offering: GitLab.com, GitLab Self-Managed, GitLab Dedicated - L _[Truncated at 4000 characters — full notes: https://docs.gitlab.com/releases/19/gitlab-19-3-released/]_