Iusespace as an Institutional State Space: Legal Configurations, Informational Projection, and the Conditions for Studying Normative Hysteresis

Legal interventions are often described through changes in normative texts, while their implementation and reversal depend on a wider configuration of institutions, practices, capabilities, and effects. This paper develops iusespace as an analytical representation of those relations. It distinguishes a legal morphospace of possible forms from an institutional state space that includes the conditions under which a form operates. The argument specifies what a representation must preserve for a stated research question, why identical observable labels can conceal different effective configurations, and how historical supports can be included without treating history as an unexplained causal force. Normative hysteresis is positioned as a hypothesis about responses after the producing condition is withdrawn, rather than a synonym for persistence or an assumption of absolute irreversibility. AgentWorld: Benchmarking Long-Horizon Collaboration of Multi-agent LLMs supplies the initiating benchmark perspective for connecting these prior theoretical developments to executable agent worlds. A synthetic review regime illustrates the distinction between restoration of a formal rule, removal of inherited supports, and restoration of an institutional capability. The paper proposes a comparative procedure using explicit variables, withdrawal phases, new cohorts, and targeted interventions on candidate carriers. Executable legal worlds provide one possible instrument for this procedure, but neither simulation outcomes nor geometric language establish legal validity, legitimate authority, or real-world effectiveness. Part I of a research series on iusespace and normative hysteresis. Conceptual working paper; no new experiments or independent mathematical validation.