Every merge to the controller's repository rebuilt the route proxy and the build seat's holder, because their builds read that repository whole. Named, the build seat hands each only its program's build source and the planner moves each only when that changes. A rename was said under its new name alone, so a file moved out of a build source changed nothing the planner could see.
build-agent
The mesh's build machine as a role every machine can hold (novox/hq ADR 0190). It holds the node seat
node-build-agent: every holder pulls one build at a time from the role's one work queue when it is
idle, so a tier of many images is built by as many machines as hold the seat and are online, and a
machine that is off builds nothing and blocks nothing. The controller asks the role, never a machine;
the outcome names the machine that built it.
What a holding machine needs is what the builder always needed, said here once: a container runtime
(the socket is mounted), the artifact store and the package registry as provisions, a workspace, and
the bus credential. The code is cmd/mesh-builder in the mesh-controller repository, compiled from
that repository's main (build.artifacts[].context); this module ships the packaging.
Assign it to every machine with a container runtime. It replaces builder, the one-holder form of the
same thing; retire that once this is assigned where it was.