read_effective(instance) reads CONTROL_ROOT/<instance>/control.cc. The root override is a thread-local under cfg(test) inside the crate; the reader tests and the Grant launch tests move in-crate to use it. The operator CLI's show derives its display line from the store it already read. An external forge probe and compile_fail examples pin the rule; the instance gate is pinned with same-length, prefix and extension forgeries, and the Persona refusal with a claim of every kind.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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