Major Tech Companies Launch Unified Agent Plugins Open Standard
Amazon, Cursor, Microsoft, OpenAI, and Vercel have established Agent Plugins, an open standard for packaging AI extensions. The spec uses a directory with a plugin.json manifest to standardise Model Context Protocol servers and Agent Skills across platforms. Developers can now build cross-platform agent capabilities without re-implementing setup logic for each tool.
Impact: High
Why it matters
Structure your custom MCP servers and agent skills into a single plugin.json package format to run across Cursor, OpenAI, and Vercel tools.
TL;DR
- 01Agent Plugins 1.0.0 standardizes directory layouts using a manifest named plugin.json.
- 02The standard unifies both Model Context Protocol tools and Agent Skills into a single distribution package.
- 03Major partners include Amazon, Cursor, Microsoft, OpenAI, and Vercel, establishing wide platform support.
Key facts
- Standard Version
- 1.0.0
- Manifest File
- plugin.json
- Supported Core Specs
- Agent Skills, Model Context Protocol (MCP)
- Founding Coalition
- Amazon, Cursor, Microsoft, OpenAI, Vercel
Cross-Platform Packaging with plugin.json
The Agent Plugins specification defines a unified directory structure containing a central manifest named plugin.json. This format eliminates the need to maintain distinct packaging for different agentic IDEs and execution runtimes.
Core Supported Components
Version 1.0.0 focuses on two foundational components:
- Agent Skills: Bundling prompt instructions, workflows, and task definitions.
- Model Context Protocol (MCP) Servers: Standardizing external tool execution, API calls, and context retrieval.
Scope and Industry Adoption
Developed openly on GitHub, the standard strictly governs packaging and discoverability rather than runtime permissions or marketplace rules. Supported by Amazon, Cursor, Microsoft, OpenAI, and Vercel, it streamlines deployment across major AI coding and agent ecosystems.
Try it in 2 minutes
{
"name": "my-agent-plugin",
"version": "1.0.0",
"description": "Unified cross-platform plugin configuration",
"skills": ["./skills/code-review"],
"mcpServers": {
"database": {
"command": "node",
"args": ["./mcp/db-server.js"]
}
}
}json
✓ When to use
- When building MCP servers or custom Agent Skills meant to run across multiple AI tools
- When standardizing extension deployment for engineering teams using Cursor and Vercel agents
✕ When NOT to use
- When targeting desktop environments that strictly require proprietary extension formats like Anthropic Cowork
- When configuring runtime security models or enterprise access controls, which are out of scope for this spec
What to do today
- Consolidate local MCP server definitions and custom skill files into a unified directory structure.
- Create a plugin.json manifest to prepare custom agent workflows for cross-platform distribution.
Sources