Full working manuscript. Six-phase empirical program: boundary classification, bridge geometry, same-charge route control, seed and expanded transition dynamics, and Phase 3C forbidden/constrained boundary tests. Includes 7 figures, 6 tables, and Appendices A–D.

Complete corpus archive: canonical CSVs (Layers A–D, Phase 3B transitions, Phase 3C boundary tests), one-column ladder files, STRUC-PERC-I and STRUC-I chamber result JSONs, derived summaries, and chamber comparison reports.

Interactive analytics covering all six phases. Route taxonomy diagram, bridge geometry cards, same-charge control bars, seed and expansion comparisons, Phase 3C contrast table (route collapse vs closure stability), cross-phase STRUC-I summary, and epistemic status.

The theoretical extraction from Charge Boundary Routing I. It formalizes the central law-level result: charge conservation is the visible projection, boundary-route preservation is the structural invariant, and charge balance is necessary but not sufficient for transition admissibility.