Design & Frontend ✓ Anthropic · Official

Playground Builder

Turn complex visual or structural choices into a live, self-contained HTML explorer.

55/ 100
Use with care

Useful, but reliability, evidence or controls still have material gaps.

See how it was scored ↓
Works as-is in
Codex · Claude Code
Stars
★ 38k
Last updated
11d ago
License
Apache-2.0
interactive-htmllive-previewprompt-generationvisual-exploration
+1frontend

What does this skill do, and when should you use it?

This skill creates interactive HTML playgrounds, explorers, and visual tools. The generated artifact typically combines controls, a live preview, and prompt output in one HTML file. Users adjust settings, see the preview update, and copy a natural-language prompt for use in Claude. The skill requires inline CSS and JavaScript, immediate updates, presets, sensible defaults, and a dark theme.

Identifies the playground type requested by the user; selects a matching template from templates/ for design, data exploration, concept mapping, document critique, diff review, or code mapping; produces a single HTML file with inline CSS and JavaScript; keeps one state object and re-renders the preview and prompt whenever controls change; describes only non-default choices in natural language; adds a copy button, 3–5 named presets, and a dark interface; then runs open <filename>.html to launch the file in a browser.

Good fit
  • A designer comparing component, layout, spacing, color, or typography decisions can use a visual design playground to explore alternatives.
  • A data or engineering user building SQL, API, pipeline, or regex queries can use a data explorer to combine parameters interactively.
  • A teacher, researcher, or product practitioner mapping concepts, knowledge gaps, or scope can use a concept-map playground.
  • A developer reviewing diffs, commits, or pull requests can use a diff-review playground with line-by-line commenting.
  • A maintainer examining component relationships, data flow, or layers can use a code-map playground for codebase architecture exploration.

How do you install this skill?

Before you use it
  • No tests or generated HTML examples are provided; inspect output manually before relying on it.
  • Browser launching and clipboard operations lack confirmation, failure feedback, and privacy guidance.
  • Versioning, changelog, maintenance ownership, and Chinese-language UI support are unspecified.
Before you start
Your agent needs
  • Shell / CLI
  • Local filesystem

The skill is located at plugins/playground/skills/playground/SKILL.md in the repository. The README says plugins can be installed through Claude Code's plugin system; the corresponding plugin directory is playground, so the supported command is: /plugin install playground@claude-plugins-official. Repository: https://github.com/anthropics/claude-plugins-official.

Generic route: install into Claude Code manually (macOS / Linux)
tmp="$(mktemp -d)"
git clone --depth 1 https://github.com/anthropics/claude-plugins-official.git "$tmp"
mkdir -p ~/.claude/skills
cp -R "$tmp/plugins/playground/skills/playground" ~/.claude/skills/
rm -rf "$tmp"

Generated from the source repository and skill path; it copies only this skill's folder. If the author's install steps above differ, follow those first. To scope it to one project, replace ~/.claude/skills with that project's .claude/skills.

How do you use this skill?

Try saying

Once installed, send your agent any of these to trigger it:

  • Create an interactive design playground for choosing colors and spacing.

Give a supported client a concrete request such as: “Create an interactive design playground for choosing colors and spacing.” The skill identifies the type, loads the closest template, and builds a single HTML file. The supplied source does not document template deployment details, complete CLI arguments, or installation commands for other clients.

What are this skill's strengths and limitations?

Pros
  • Well suited to large, visual, or structural input spaces that are difficult to express as plain text.
  • Produces a single file with inline CSS and JavaScript rather than relying on external CDNs.
  • Updates the preview and prompt immediately and provides clipboard feedback.
  • Includes sensible defaults and 3–5 named presets for a usable initial state.
Limitations
  • It depends on matching files in templates/, whose contents and distribution details are not included in the supplied material.
  • Only six template categories are specified; other topics require adapting the closest template.
  • The source provides no test suite, browser compatibility matrix, or evidence of generated-output validation.
  • The workflow requires creating and opening an HTML file, so the client needs filesystem and shell access.

How does this skill compare with similar options?

Side by side with related skills; every score comes from the same FSRS standard.

Skill FS score Stars Last updated License
Playground Builder this page ✓ Anthropic · Official 55 · Use with care ★ 38k 11d ago Apache-2.0
Academic Figure Prompt Generator 69 · Recommended ★ 2.6k 7mo ago MIT
Superdesign Design Skill 53 · Use with care ★ 840 2mo ago MIT
Web Design Engineer 50 · Use with care ★ 13k 15d ago MIT
AnyDesign 58 · Recommended ★ 219 1mo ago MIT

How did FollowSkills review this skill?

FollowSkills review · FSRS-2.0
Use with care
55/ 100 5-point scale 2.8 / 5
The upstream repository has new commits since this review. The score still applies to the reviewed revision shown and may not cover the latest changes.
1Trust17 / 25 · 3.4/5

The skill limits output to a self-contained HTML file, requires inline CSS/JS, and forbids external dependencies, reducing dependency and data-exposure risk. It nevertheless instructs the agent to run `open` and use clipboard copying without describing user confirmation, sensitive-data handling, data-flow disclosure, or rollback, so points are deducted.

2Reliability8 / 20 · 2.0/5

A coherent state/updateAll pattern, defaults, presets, and live-update requirements make the main path understandable. However, there are no tests, input validation, missing-template handling, or diagnosable behavior when the browser command is unavailable; static review also prevents a higher score.

3Adaptability11 / 15 · 3.7/5

Trigger language, intended scenarios, and six template categories are reasonably clear, with guidance to adapt the closest template. Non-fit boundaries, semantic exclusions, Chinese-language support, and environment-specific behavior are under-specified. The core function does not depend on overseas services.

4Convention8 / 15 · 2.7/5

The skill has progressive guidance, categorized templates, code examples, common-mistake warnings, and basic dependency notes. Repository context supplies Apache-2.0 licensing and Anthropic provenance, but the skill does not state versions, changelog, maintenance ownership, or an update path, so points are deducted.

5Effectiveness7 / 15 · 2.3/5

The intended result is a directly usable single-file interactive playground with live preview, natural-language prompt output, and copy functionality, so the core value is clear. No generated examples or execution evidence are supplied, so completeness and usability cannot be verified; the static ceiling applies.

6Verifiability4 / 10 · 2.0/5

The SKILL.md, templates, and repository workflow are auditable primary materials, and the implementation patterns are concrete. There are no tests or third-party execution results covering the skill's key paths, so evidence remains limited and the static ceiling applies.

1 2 3 4 5 6

Open a dimension to read why it scored that way

Reviewed Jul 20, 2026 Reviewed revision b0b9f02b0581 Review evidence[1][2][3][4][5][6][7][8][9][10][11][12]

Evidence confidence:Low — Mostly static review, author material or a limited demo; useful for discovery, not high-risk decisions.

See the full review method →

FAQ

What does it produce?
It guides the creation of a self-contained single-file HTML playground with interactive controls, a live preview, prompt output, and a copy button.
Does it require network access or external dependencies?
The skill requires CSS and JavaScript to be inline and explicitly warns against external dependencies; it shows no requirement for network access or MCP.
Can it handle any topic?
Not necessarily. Six template types are specified, and topics outside them should use and adapt the closest template.
Will it work outside Claude Code?
The SKILL.md uses only name and description frontmatter and shows no platform-specific extensions, so it is portable to generic Agent Skills clients such as Codex. A model API still needs a caller that can create files and run shell commands.

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