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/html-diagram

@e1e71db
by plannotatorplannotator/effective-html3.5k stars
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Direct-invocation specialist for self-contained HTML diagrams whose layout, notation, and interaction clarify relationships, sequence, topology, state, hierarchy, or quantitative structure. Use when the user explicitly invokes html-diagram or the broad html skill routes a diagram request here. Do not activate independently from a general request.

Use this Skill: https://skilld.dev/gh/plannotator/effective-html/html-diagram

Nothing lands on disk. Nothing to clean up.

Fork this Skill

Edit a local copy. It keeps the author and licence.

SKILL.md

≈91 tokens for metadata: the name and description. ≈580 when used: this file. ≈65 more on demand in 1 file.

Description uses 4.5% of example budget

Before choosing a Skill, your Agent reads its name and description. All available Skills share that space.

  • A shorter description leaves more room for other Skills. This entry exceeds our 1% size suggestion.

In our Claude Code example, all Skill names and descriptions share 8,000 characters. This Skill uses ≈363 characters, or 4.5%.

The 1% threshold is a size suggestion. Longer descriptions can still fit.

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Example settings and source

The example uses a 200k-token context and default Claude Code settings. The count includes the name, description, separators, and when_to_use when present. Codex also counts local file paths.

Skit's source and limits: Codex 0.160.1, Claude Code 2.1.292.

HTML Diagram

Build the smallest visual model that makes the relationship easier to understand than prose alone. Match the notation and visual language to the user's project and subject. Do not force every topic into the same SVG boxes and arrows.

Choose the right model

Identify the question the reader should answer, then select the form:

  • topology for components and connections;
  • sequence for ordered messages over time;
  • process for steps, branches, and handoffs;
  • state for transitions and conditions;
  • hierarchy for containment or ownership;
  • timeline for change over time;
  • matrix for repeated relationships;
  • quantitative view when magnitude matters.

Decide what must remain visible together and what can be revealed on demand. Use a simpler form when it carries the same meaning.

Choose the rendering method

Use HTML and CSS, SVG, Canvas, or WebGL according to the information and scale. Do not use SVG merely because the output is a diagram.

  • Keep labels, grouping, direction, and connectors legible before adding interaction.
  • Use stable node positions when readers must compare states or steps.
  • Keep edge crossings and ambiguous arrowheads to a minimum.
  • Put intentionally broad canvases in a contained pan or scroll region.
  • Use legends only when notation is not self-explanatory.

Add sequencing, filtering, path tracing, pan and zoom, or animation only when it helps answer the stated question. Keep overlays dismissible, controls keyboard-accessible, and motion compatible with prefers-reduced-motion.

When design-artifact is available, read it for the diagram's surrounding composition and visual register. Keep the chosen diagram grammar, label legibility, and relationships authoritative over decorative treatment.

Build and verify

Deliver one self-contained HTML file with essential CSS and JavaScript inline. Require no build step or external service. Use accessible text alternatives and keep important meaning available without animation or color alone.

Inspect the result at wide and narrow widths. Check label collisions, clipped nodes, edge routing, reading order, keyboard operation, overflow, and every interactive state.

Return the absolute path, the diagram form chosen, and the main simplifications or assumptions.

Source: SKILL.md on GitHub

Skill behaviors

No rule matched.

skilld matched fixed text patterns in SKILL.md and file names. Patterns miss obfuscated code.

skilld run checks every file with the same patterns. It asks for approval before it loads a Skill with a behavior marked Needs approval.

Third-party checks

No alerts2mo3 checks · Risk SAFE
  • Gen Agent Trust Hub2mo

    The skill provides safe instructions for an AI agent to generate self-contained HTML diagrams. It focuses on visual modeling logic and explicitly prohibits external services.

  • Socket2mo

    No alerts

  • Snyk2mo

    Risk: LOW · No issues

Provenance

Signed by skilld at e1e71db. This ties the file your Agent reads to that commit on GitHub. It does not review the instructions.

Last checked against GitHub 3 weeks ago.

Activeupdated 2 months ago

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