Three step_in tests and two split tests failed in debug builds only: truck's debug_new asserts simple loops and two distinct end vertices, but faces whose loop runs a seam edge both ways and full-circle edges on one vertex are valid. Meshed faces and edges are now built unchecked. ci (release) was unaffected; the kernel tests pass in debug and release. Co-Authored-By: Claude Opus 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01AS5Tn3xieewUSg3uxrMVdL