The node-engine fills ${config:} only in files, unit names, owners and groups, never in a
process's environment, so MESH_CONFIG_CALLERS was never set and design 51's defaults always held.
The tools bundle now reads `callers` through stdio.Config on each call (holder.ConfiguredCallers,
Verbs.WithCallers per call); the program, which has no runtime resolving config, asks its own
tools bundle's new registry_callers on each wake of the windows (manifest invokes). The
environment variable is gone.
Claude-Session: https://claude.ai/code/session_01JG73KJNrH5EgFXMKKYSrig
The program had no test that runs it whole. This one starts run() on a nats-server of its own, with the registry
container faked on the loopback and node_haves and manifest-reads answered on their call subjects: an away node holds
both windows open, its return closes them, each closing said once on distribution.events, a direct write is then
refused, reads stay open, the health check answers through the program's port, and a waiter on published wakes on
none of the windows' events.
Claude-Session: https://claude.ai/code/session_01JG73KJNrH5EgFXMKKYSrig
jschoubben