GitHub MCP Server currently documents several client-specific setup paths. A small Agent Plugins 1.0 package would give compatible clients one portable plugin.json and mcp.json definition for the hosted MCP endpoint.

Proposed scope:

• add agent-plugin/plugin.json with project identity and license metadata
• add agent-plugin/mcp.json for https://api.githubcopilot.com/mcp/
• keep existing installation methods unchanged

I prepared and schema-validated this package, then exercised package add, info, and remove with agentplugins 0.1.17 in isolated Codex, Cursor, and Kiro config-only profiles. Those checks prove package ingestion and lifecycle only. They do not claim tool runtime or authentication E2E.

If this direction is acceptable, I can open the focused PR.