Module validation 

Functions

is_convex

perimeter_l1

validate_compactness

Boundary-level compactness check. Apply to a whole polygon’s outer boundary (single part, or the union boundary of a multipart polygon). NOT intended for individual parts of a multipart polygon — that would be stricter than on-chain and reject legitimate decompositions.

validate_edge_lengths

validate_part

Per-part structural validation mirroring polygon.move’s part() entry: vertex-count bounds, weak convexity, and minimum edge length.