Single plugin.json manifest lets you package Agent Skills and MCP servers once, load across ChatGPT, Cursor, GitHub Copilot, and VS Code without reformatting for each client.
Summary
Eliminates repackaging the same skill or MCP server for different client conventions—write once, deploy to five major platforms. Reduces friction for extension authors and simplifies client implementation.
Why it matters
Eliminates repackaging the same skill or MCP server for different client conventions—write once, deploy to five major platforms. Reduces friction for extension authors and simplifies client implementation.
Implementation verdict
Replaces ad-hoc client-specific packaging. Requires adopting the directory structure (plugin.json at root, skills/ and mcp.json subdirs) and validating against the JSON schema. Ready now: five major clients already support it at launch. Worth trying immediately if you maintain agent extensions.
Sources
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