The show-me skill github.com
A small skill from humanlayer with a clear job: when the topic would land better as a picture, draw one instead of writing three more paragraphs. Its own description is to help the user understand the current topic visually with concise diagrams, code-shape sketches and focused HTML artifacts.
What makes it worth reading is that it does not just say “use a diagram”. It matches the form to the question: pseudocode for logic, call trees for runtime control flow, component trees for UI structure with state and boundaries, file trees for organisation, mermaid for interactions and data flow, diffs when the point is what changed, and an HTML artifact when the thing is a comparison or a layout.
The governing rule is restraint. Put the visual next to the text it supports, and include only the detail needed for the question actually asked. That constraint is what stops this kind of skill producing an elaborate diagram of everything except the thing you wanted to know.