Host-backed REL builtins

The global names are:

:import[workspace]
:import[script]
:import[archive]

They are host capabilities rather than pure evaluator functions.

workspace

• workspace.temp(operation)
• workspace.construct()
• workspace.fetch(options)
• workspace.copy(source, destination)
• constructed-plan step, after, and run

script

• script.run(path)
• script.runPyPy(path) / script.run_pypy(path)
• script.runRust(path) / script.run_rust(path)

archive

• archive.list(path)
• archive.read(path, entry)
• archive.extract(path, entries, destination)
• archive.create(source, destination)
• archive.replace(path, entry, source)
• archive.remove(path, entry)

Host-backed builtins are unavailable to pure .field sources. Module, Service and Route execution may use them after RELC and the host authority grant them. Server REL may declare imports through the shared grammar; actual helper execution remains gated by the Server host bridge.