A bundle carries its dependencies, the SDK among them; imported in-process that copy was a second SDK with its own tool registry, so a bundle registered its tools into a list the runtime never read and served nothing, silently. A resolve hook (module.registerHooks, in thread; module.register is deprecated from Node 26) now sends every import of @novox/mesh-sdk, from whichever bundle, to the runtime's own copy: one registry, one broker. The test loads a bundle from a directory holding its own SDK copy and sees its tool served.
node-tools
The node's tool runtime as a module (novox/hq ADR 0175, to-be 38 WP3). Assigned to a machine, it is one process the host runs from this bundle, as the operator's account: it serves every assigned module's tools and every held seat's verbs on the bus, and answers MCP on the machine's loopback — the console (design 34). The controller composes the process (which bundles to load, where the credential is, whose machine it is); this manifest says only what the machine must have for it: the interpreter, a place for the credential, the loopback port, and leave to call every tool.
The code is the mesh-tools package in this directory; the module at the repository root,
mesh-tools, builds the images TypeScript bundles are compiled in. See the repository README.