{ "$schema": "https://static.modelcontextprotocol.io/schemas/2025-08-26/mcpb.manifest.schema.json", "name": "test-extension", "version": "1.0.0", "description": "A test DXT extension", "author": { "email": "not-a-valid-email" }, "server": { "type": "invalid-type", "entry_point": "server/index.js" } }