open-press Diagram Drawing

This skill owns diagram semantics, not visual skin. It decides what the diagram should show and what text belongs inside the figure.

Core Rule

Draw the relationship, not the explanation.

Figure bodies may contain only spatially meaningful information: object labels, pointer names, field names, axes, legends, short state labels, node values, NULL, and operation-order labels.

Move reasons, warnings, edge cases, teaching commentary, and interpretation into surrounding prose or captions.

Responsibilities

• Choose whether a concept needs a diagram, table, code block, or prose.
• Define nodes, links, arrows, states, labels, and before/after relationships.
• Keep figure text lean and connected to position or direction.
• Prevent diagrams from containing answers, production notes, or caption-like sentences.