Major AI tool makers back a shared plugin format for agents

Amazon, Cursor, Microsoft, OpenAI, and Vercel have introduced Agent Plugins, a shared standard for packaging extensions that AI agents can use.

The Decoder reports that version 1.0.0 uses a plugin.json manifest and supports both agent skills and MCP servers. In plain terms, the standard is meant to describe what an extension is, what it can do, and how an agent should connect to it.

The practical consequence is portability. Developers are already building agent tools for coding, deployment, data access, and workflow automation, but each platform can package those capabilities differently. A common format could reduce the work needed to move an agent extension between environments or publish it for broader reuse.

Standards do not automatically solve trust. Agents still need permission boundaries, provenance checks, and clear review before a plugin can act on files, accounts, or production systems. But a shared package format gives the ecosystem a more concrete base than one-off integrations.