# go

The Go toolchain as a module (novox/hq ADR 0477 clause 4, issue 1573).

- **The only module that declares the package `go`.** `checks/toolchains` refuses any other that does.
- **Provides `go-toolchain` with the machine's reach**: dev-tools, lab and mesh-build-go require it, so each
  composes only on a machine where this module is assigned. It is never pulled in for whatever asked, so `go` is
  assigned to a node on purpose, and a node without it refuses those modules at resolution.
- Holds no long-running resource, so it adds nothing to `health-undeclared`.

The node-engine never uninstalls a package, so moving the declaration here removed nothing from a node.