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error exposes one op with strict/collecting/result handler strategies. state declares EffState : Π(S:U). U with get/put/modify and ships a kernel-term handle_State head-normalised at run-entry by the trampoline bridge. typecheck declares EffTypeCheck : Π(R:U). U with one report op and six policy handlers: five fold a stream of membership decisions, and strict throws on the first failure.

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