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- Infrastructure table: add Matrix (→ Eigen inline, done) and P2 rows. P2 marked "port inline with Phase 9c" — almost exclusively consumed by FundamentalPolygon/CanonicalForm/SurfaceCurve (all Phase 9c), so building p2_geometry.hpp as a standalone ahead of 9c would be dead weight. - Phase 9c rows in the utility table: ⚠️ annotation listing the exact P2.* methods needed (makeDirectIsometryFromFrames, projectP3ToP2, imbedMatrixP2InP3) plus the P2Big/cpp_dec_float_50 high-precision prerequisite for the group-relation product ∏gᵢ = Id. Ensures a future Phase 9c session starts with full context and does not discover the jReality/precision dependencies mid-port. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>