Three.js — an example artifactory
The Phase 4 pilot (doc 45 §8, board mtoo81hz7eu6je): a THIRD PARTY's MCP App,
byte-for-byte the reference @modelcontextprotocol/server-threejs from
modelcontextprotocol/ext-apps, hosted by the Dimension engine and rendered in
the artifact-view seat with zero code of its own.
The whole plugin is packaging: .mcp.json names the server (stdio), and
dimension.plugin.json says which server the engine hosts as an App
(artifactories: [{ mcpServer: "threejs" }]). Nothing else.
Try it: install artifactory-threejs from the Dimension marketplace (it is in
the catalog), or bun install here and link the directory as a plugin in a dev
home (plugins op:link / inso plugins link .); then ask the agent to show a
3D scene.