forked from 1b-agent/fieldcraft-upstream
Topology::split cuts a block at given fractions and every block chained to it through parallel edges, orienting the fractions through the chain, so the topology stays conforming. A certified-invalid element is reported with its block, cell, centre and the block vertex and blocks meeting there; the mesh is never emitted. Co-Authored-By: Claude Opus 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01UhhZMBTviDQxZvwnyP89fo