The slipnet node previously called "bondFacet" was misleading since "facet" is used throughout the codebase as a property name on Bond, Group, and Rule objects. Renamed to "bond_edge_type" to better reflect its role as a descriptor type category. Also removed precomputed minPathToLetter data from slipnet.json. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>