Current reading files

1. 490d_Chronological_Families_Explanation_Through_C1634_Portable.md — current complete synthesis. Its only change from the frozen original is a relative link to the included family-map image.
2. 490d_Chronological_Families_Explanation_C1431_Print.pdf — current 30-page printable explanation, through C1634. The C1431 filename is retained from the original publication.
3. Strategy_Review_After_C1634.md — current assessment and next research direction.
4. 490d_C1585_C1634_Continuation_20260929.md — the latest 50 questions, results and reassessments.
5. 490d_Technical_Companion_C1431.md / _Print.pdf — technical reference from the C1431 synthesis, updated for the subsequent comparative-spine integration. It is useful supporting material, but does not contain every later C1432–C1634 result. Follow those cycles for newer proofs.

The family map, glossary and four-part grammar overview retain their C1431 scope. Later relationships are described in the current explanation and continuation. The frozen original Markdown is also retained here and in its evidence cycle; its old sandbox image link belongs to the original chat. No frozen source or research record was changed to make the portable copy.