FRC 830 - Reciprocity Mathematics: Ledger Geometry, Lift Obstructions, and the Present Majid Gate (Papers 000-005)

This coordinated research object contains six FRC 830 working papers on normalized entropy-coherence ledger geometry, affine classification, typed operational-register morphisms, exact one-parameter lift obstructions, the qubit dimension threshold, state-lift non-reconstruction, and comparison with canonical Born reciprocity and Majid-style representation-theoretic self-duality. The positive results are coordinate classifications and scoped obstruction theorems under declared hypotheses. The set does not establish a physical, Hopf-algebraic, Born-, or Majid-style self-duality. General nonunital, coherence-generating CPTP realization remains open. The deposit includes six PDFs, six visual summaries, Markdown sources, deterministic reproducibility scripts, and the FRC 830 consistency audit. Publication posture: working draft; exact-mathematical-candidate where declared; independent proof review pending.