forked from 1b-agent/fieldcraft-upstream
solve.nonlinear counts the slipping nodes, solve.probe gives a secondary node's shear traction and slip, and the results display draws contact_shear and contact_slip, contact_status coding stick and slip. Co-Authored-By: Claude Opus 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01UhhZMBTviDQxZvwnyP89fo