AI titans to tidy agent frontier with plugin prescription
Agent Plugins 1.0 defines a write-once-run-anywhere container for passing tools and skills across different agent platforms
Major AI companies have united to develop a standardized format for codifying agentic skills and tools across platforms. The shared standard, dubbed Agent Plugins, is designed to enable developers to seamlessly transfer these AI capabilities from one system to another, such as during a job transition. Vercel unveiled the initial draft of the Agent Plugins spec on Thursday, with contributions from Amazon, Cursor, Microsoft, and OpenAI—all committed to the project's success.
The Linux Foundation's Agentic AI Foundation (AAIF) quickly endorsed the initiative, though it will operate independently.
Agent Plugins 1.0, which builds upon the AAIF's MCP (Modular Connection Protocol) and the open Agent Skills standard, packages an AI agent's skills and tools into a single directory structure. This modular approach allows AI capabilities to be easily ported to other platforms, following the "write once, run everywhere" principle. However, the responsibility of providing a user interface, securing data, and establishing marketplaces for plugin sharing remains with the individual agent clients or platforms.
Currently, popular coding tools like VS Code, Cursor, GitHub Copilot, ChatGPT, Codex, and Kiro all support the Agent Plugins standard. The format uses the host computer's directory structure to define components, with a manifest file containing the plugin's name, version, and schema. Skills are stored in a dedicated skills sub-directory, while the MCP server configuration is documented in an mcp.json file. Additional extensions can be housed in a namespace directory.
The spec deliberately keeps its scope narrow to ensure portability across various agent clients without overloading it with client-specific experiments. While the team welcomes enhancements to future versions of the spec, developers can currently add experimental hooks and extensions to the namespace with the hope of future portability.
The Agent Plugins project will be governed by an independent technical oversight committee, with representatives from Amazon, Cursor, Microsoft, OpenAI, and Vercel leading the charge. Licensed under the Creative Commons Attribution 4.0 International License (CC-BY-4.0), the spec has also seen Google's Agent2Agent protocol integrated into the AAIF, as well as a complementary project called Skills Over MCP.
The debate over which approach—embedding skills within MCPs or bundling them separately—will ultimately prevail remains to be seen.
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