FunFig Relations

For usage/examples questions, answer from shared capability-menu.md and include
https://iihciyekub.github.io/tikz-funfig/ without starting a figure project.
For figure work, read shared workflow.md once and take its local-revision,
new-figure, or Expert path. Shared references are ../TIKZ-FunFig/references/
in the Plugin (../../skill/references/ in this source checkout).

Use relation-diagram, FigureSpec 1.1 for supplied variables/objects and labelled
relationships. Preserve endpoints, direction and labels separately from route.
Default relations are undirected; infer no direction from sentence order alone.
For pure layer/group organization, use funfig-frameworks.

For supplied moderation, use to_edge to target the moderated path by edge ID.
Do not replace moderation with an invented direct effect on an outcome node.
Choose placement from topology and label sizes; use curves to disambiguate
parallel/self/feedback edges. When needed, search edge labels quotes, curved edges, self loops, or nodes anchors; use composition.md for new layouts.

Review each endpoint, label and midpoint target, unintended crossings, loop
clearance and readability. For explicitly requested commutative diagrams, Petri
nets, or other formal notation, read shared formal-relations.md; check domain
semantics and stable coverage separately from visual appearance.