Today, xAI shipped the Grok Build Plugin Marketplace. It is a built-in catalog of plugins for Grok Build, the company’s terminal coding agent. A plugin bundles skills, slash commands, agents, hooks, MCP servers, and LSPs into one package. You browse, install, and update these packages without leaving the terminal.
Grok Build is xAI’s coding agent and CLI for software engineering work. The marketplace adds a discovery and distribution layer on top. Before this, developers wired up each integration one at a time. Now a single command pulls a complete bundle into the agent. The catalog lives in the open repo xai-org/plugin-marketplace on GitHub. That repo is an index. It points at plugin sources so Grok Build can fetch them.
Inside a Plugin
A plugin is a directory bundling any combination of six component types. Each type maps to a specific file or folder. The table below lists them.
ComponentLocationPurposeSkillsskills/SKILL.md capabilitiesCommandscommands/Slash commandsAgentsagents/Subagent definitionsHookshooks/hooks.jsonLifecycle hooksMCP servers.mcp.jsonMCP server configsLSP servers.lsp.jsonLanguage server configs
