graphify path and the MCP shortest_path tool now build a digraph from the
true _src/_tgt directions and respect edge direction by default, so a
returned path no longer traverses edges backwards. --undirected (CLI) /
undirected=true (MCP) opt out; no directed path is reported plainly
instead of silently returning a reversed one.
Thanks @luliaz0601.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>