method_name is the exact JSON-RPC wire name. The direction and kind areprotocol facts, not runtime capability decisions; capability gates areapplied by the endpoint layer after method lookup.
Return a fresh, exact manifest for the stable ACP v1 method surface.
A fresh array on every call keeps the public value free of shared mutablestate. This list follows the fixed v1 table in the implementation plan;v2 and unstable overlays are deliberately absent.