Introducing Agent Plugins

Agent Plugins 1.0.0 is an open, vendor-neutral standard that provides a common packaging format for reusable AI agent extensions, specifically Agent Skills and MCP servers. A plugin uses a simple directory structure centered on a minimal plugin.json manifest, with Skills placed in a skills directory, MCP server configuration in mcp.json, and optional namespaced files for client-specific extensions. The specification standardizes discovery, validation, and loading while allowing clients to retain control over installation, distribution, policies, user experience, and proprietary capabilities; invalid components also do not prevent unrelated components from loading. Proposed by Vercel and developed with contributors from AWS, Anysphere, GitHub, Microsoft, OpenAI, and Vercel, the project is openly governed and designed to avoid control by any single vendor. Supporting clients at launch include ChatGPT and Codex, Cursor, GitHub Copilot, Kiro, and VS Code, enabling extension authors to package compatible components once for use across these platforms.

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