Host commands were declarative-only: dispatch() returned the YAML-defined
HCACK plus side effects, and ignored the command parameters entirely (the
param list was a commented-out argument). Equipment could acknowledge a
command but never run anything in response — the pvd_tool example worked
around this by hard-coding behaviour in a C++ router handler.
Add set_handler(rcmd, fn): a registered handler receives the live CPNAME/
CPVAL parameters and returns the HCACK, overriding the declarative default.
Live on S2F41/F21/F49 via the shared dispatch(). No handler => byte-for-byte
the previous declarative behaviour.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
raphael
0090791968