OpenAI, Microsoft, AWS, Cursor, and Vercel don’t agree on much. On August 6 they shipped Agent Plugins 1.0 together — an open standard that packs Agent Skills and MCP server configs into one portable plugin directory. Build it once and it loads in ChatGPT, Codex, GitHub Copilot, VS Code, Cursor, and AWS’s Kiro.
Until now every coding agent had its own plugin format, so authors maintained six parallel versions of the same thing. That’s the problem this kills.
An open spec you can build against today
Vercel wrote the initial proposal; a technical steering committee from AWS, Cursor, Microsoft, OpenAI, and Vercel maintains it, with GitHub contributing. The spec evolves in public on GitHub and proposals go through open Discussions. A plugin is just a directory — a manifest plus your skills and MCP config — and all six launch clients read it. Fair warning: it’s still a working draft, with no plugin store and no security spec yet.
The name missing from the list
Anthropic. Which is awkward, because Anthropic created MCP and shipped the skills-plus-plugins model everyone else is now standardizing without it. After MCP, this is round two of the agent-ecosystem standards war — and this time the rest of the industry moved first.
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