Visual Explainer
github.com/nicobailon/visual-explainer- Category
- AI Agents
- Rank
- No. 415Tools index
- Pricing
- Open Source
- Platform
- cli · web
- Type
- TOOL
- Builder
- @nicobailon
- GitHub
- 9.8k stars
- Latest release
- v0.11.0
- Date
About
An agent skill that transforms complex terminal output, diagrams, and data into beautiful HTML pages and slide decks. Instead of unreadable ASCII art and text tables, it generates styled web pages with interactive Mermaid diagrams, proper typography, and dark/light themes.
What it does
Visual Explainer gives coding agents a structured way to choose a visual format for technical material. It maps flows to Mermaid, architecture detail to card layouts, comparisons to semantic tables, metrics to charts, and presentations to viewport-sized slides. Bundled prompts cover code changes, plans, project recaps, document checks, and general diagrams.
Why it's ranked here
The tool has unusually concrete guidance for producing readable technical visuals, including representation choices, overflow rules, accessibility-minded markup, diagram controls, and slide navigation. Its broad harness coverage is useful, but only Pi receives a native tool. Other environments depend on copied skills, optional prompts, marketplace packaging, or rules guidance.
What's good
The strongest feature is disciplined output guidance. Large architectures become a small overview plus detail cards instead of one cramped graph. Mermaid diagrams require zoom, pan, reset, and expansion controls. Tables preserve semantic structure and long-text wrapping. Slides use distinct layouts, keyboard navigation, indicators, and source-coverage checks. Generated pages need no build step.
Tradeoffs
Output quality varies with the model doing the generation. Browser opening can fail under harness or sandbox restrictions. Theme changes require refreshing Mermaid graphics. Command-template behavior varies across Codex and OpenCode builds. Cursor and OpenClaw receive guidance rather than native adapters. The Pi tool validates and writes completed HTML, but the agent still creates the document itself.
How to use it well
Use it when an agent has already gathered enough source context and the result would be clearer as a diagram, comparison, review page, recap, or presentation. Give the topic, audience, goal, and relevant sources, then inspect the browser output for coverage and overflow. Do not treat its Cursor or OpenClaw guidance as native integration, or expect consistent results across models.
Technical notes+
package.json exposes plugins/visual-explainer/extension.ts, the canonical skill, and command templates to Pi through package metadata. The extension registers visual_explainer with prepare and render actions. Rendering validates a complete HTML document, restricts output names to basenames, rejects control characters and traversal markers, creates ~/.agent/diagrams/, refuses symbolic-link output targets, writes UTF-8, and dispatches platform-specific browser openers. plugins/visual-explainer/SKILL.md contains representation and delivery rules, while plugins/visual-explainer/commands/fact-check.md defines source-backed document verification. .claude-plugin/marketplace.json supplies Claude Code marketplace metadata, and install-pi.sh remains a legacy copied-resource installer without the native tool.
Observed
- License
- MIT
- Implementation surface
- TypeScript Pi extension, HTML templates, Markdown skills and command templates
- Pi packaging
- Package metadata advertises one extension, one canonical skill directory, and bundled prompts
- Interfaces
- Agent skill, slash-command templates, Claude Code marketplace plugin, and one native Pi tool
- Harness support
- Claude Code, Pi, Codex CLI, OpenCode/opencode, Cursor, and OpenClaw are documented
- Native browser opening
- The Pi extension dispatches macOS, Linux, and Windows browser-opening commands
- Runtime output
- Complete HTML documents are written under the user agent diagrams directory by default
Read from README.md, package.json, plugins/visual-explainer/extension.ts, LICENSE, CHANGELOG.md, install-pi.sh, .claude-plugin/plugin.json, .claude-plugin/marketplace.json, configs/pi/AGENTS.md, configs/codex/AGENTS.md, configs/openclaw/AGENTS.md, configs/opencode/AGENTS.md, plugins/visual-explainer/SKILL.md, configs/cursor/visual-explainer.mdc, plugins/visual-explainer/commands/fact-check.md.
What it can do
Convert terminal output to styled HTML pages
Raw terminal output text → Styled HTML page with proper typography
Transform ASCII art into interactive Mermaid diagrams
ASCII art or diagram text → Interactive Mermaid diagram embedded in HTML
Convert text tables into formatted HTML tables
Plain text tables → Styled HTML tables
Generate slide decks from complex data
Terminal output or structured data → HTML slide deck presentation
Apply dark/light theme styling to content
HTML content → Themed HTML with dark/light mode support
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