Playground Builder
Turn complex visual or structural choices into a live, self-contained HTML explorer.
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.
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.
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.
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.
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.
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.
- 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.
What it does & when to 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.
- 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.
Pros & cons
- 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.
- 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 to install
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.
How to use
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.