Curated catalog of 20 GNU Radio OOT modules served via two MCP
resources (oot://directory, oot://directory/{name}). Each entry
includes git URL, branch, build deps, and a ready-to-use
install_oot_module() example.
Modules are tagged preinstalled when they ship with the
gnuradio-runtime base Docker image (12 of 20), so agents can
distinguish what's already available from what needs building.
