Regime Threshold Series - Reader Card

The Regime Threshold Series — Reader Card provides the human-oriented navigation layer for the ten-paper Regime Threshold Series. It gives readers a direct entry into a domain-independent architecture for constructing, classifying, relating, identifying, sequencing, and re-evaluating regime thresholds, while preserving the distinction between the scientific offices owned by RTS0–RTS9. The card presents the series as a claim-specific dependency architecture rather than a universal linear chain. It routes threshold definition and event semantics to RTS0; precedence relations to RTS1; composite admissibility and first-boundary exit to RTS2; pre-threshold approach to RTS3; return, hysteresis, and reversibility to RTS4; threshold coupling and boundary deformation to RTS5; empirical identifiability to RTS6; sequence representation to RTS7; endpoint-constrained trajectory families to RTS8; and typed biological threshold questions to RTS9 after the governing biological status has been established. A central contribution of the Reader Card is the explicit formulation of exactness under declared conditions. Exactness is treated in a typed and claim-relative sense: exact object, exact relation, exact dependency burden, exact status strength, and exact jurisdiction, including exact localization of what remains underdetermined. Positive, negative, restricted, mixed, and underdetermined outcomes can therefore be equally exact when they express the strongest status supported by the governing mathematics, evidence, model, or comparison frame. The card also supplies the semantic separations required for correct reading of RTS: threshold is distinguished from event and date; contact from crossing; crossing from persistent exit; proximity from approach; approach from prediction; first exit from causal primacy; recovery from return; hysteresis from irreversibility; system coupling from threshold coupling; evidence from target status; precedence from chronology and sequence; sequence from route; trajectory family from controlled path; and biological status from threshold status. The public function of the Reader Card is explanatory orientation. It identifies reading routes, paper functions, relation types, conditional parents, upstream anchors, public boundaries, and the maximum public result of the series without independently assigning any paper-native scientific status. It preserves the distinction between scientific description and operational command: RTS does not supply target selection, actuator mappings, calibrated action-to-threshold transfer, intervention timing, feedback laws, steering procedures, or control schedules. The card is complementary to the Regime Threshold Series — Machine Routing Reader Card for AI / RAG / Institutional Audit (DOI 10.5281/zenodo.23597552), which encodes machine retrieval, dependency gates, query-to-paper routing, retrieval bundles, anti-confusion rules, status semantics, and institutional-audit instructions. Corpus-level placement is resolved through the current Living Cartography of the Published IDAU Corpus (Ninth Edition, DOI 10.5281/zenodo.23597604). Neither Reader Card is a scientific parent paper or an independent source of RTS status.