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create-an-edge-app

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The recommended way to create an Edge App

QUICK START

How to use this skill

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  1. Open your project in Codex.
  2. Copy the prompt below and paste it into your agent.
  3. Review the proposed files and risks before you approve installation.
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I want to install this Agent Skill for this project in Codex.

Source SKILL.md: https://github.com/majiayu000/claude-skill-registry/blob/HEAD/skills/data/create-an-edge-app/SKILL.md

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First, summarize what it does, its dependencies, license status if identifiable, and any risks. Show the exact files you propose to add under .agents/skills/create-an-edge-app/. Do not write files or run scripts until I approve.

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Creating an Edge App

When Creating an Edge App

  • Create a new directory for a new Edge App inside the edge-apps/ directory.
    • The directory name should follow the kebab-case naming convention.
  • Consult Figma designs before starting implementation.
    • Ensure the Figma MCP server is set up in Claude Code.
    • Use the Figma MCP server to access design specifications, mockups, and UI requirements.
    • Extract design tokens such as colors, spacing, typography, and component specifications from Figma.
    • Ensure the implementation matches the approved designs in Figma before proceeding with development.

Directory Structure

The new Edge App directory structure should closely resemble that of the following Edge Apps:

  • QR Code (edge-apps/qr-code/)
  • Menu Board (edge-apps/menu-board/)
  • Grafana (edge-apps/grafana/)
  • CAP Alerting (edge-apps/cap-alerting/)

These Edge Apps heavily rely on the Edge Apps library, which lives inside the edge-apps/edge-apps-library/ directory.

  • Most of the scripts inside the package.json of each of these apps execute the edge-apps-scripts command.
  • All of these apps depend on the @screenly/edge-apps library, which maps to workspace:../edge-apps-library.
  • edge-apps/[new-edge-app]/src/main.ts is a required file.
    • Running bun run build inside edge-apps/[new-edge-app] will run edge-apps-scripts build, which is very opinionated.

Refer to edge-apps/qr-code/ as a complete working template to understand the full directory structure and configuration.

  • While it still uses the @screenly/edge-apps library, it features a simpler implementation with a lower code footprint compared to the other aforementioned Edge Apps, making it an excellent starting point for new projects.
  • The library abstracts much of the complexity, allowing developers to focus on core functionality with minimal boilerplate.

About the Manifest Files

The new app should have the following manifest files:

  • screenly.yml
  • screenly_qc.yml

See edge-apps/qr-code/screenly.yml for a working example. More information about the manifest files can be found in the Edge Apps documentation in the Screenly/cli repository.

When creating the manifest files, ensure to:

  • Omit the id field, as it will be added later when the new app gets deployed.

About index.html

The index.html file should follow these best practices:

  • Organize HTML code into templates and Web Components as the app grows in complexity.
  • Use HTML content templates first for simpler structures.
  • Consider using Web Components for more complex UI components that require encapsulation and reusability.

About README.md

  • Include instructions on how to create, build, test, format, lint, and deploy the app.
  • Do not add details like the directory structure, as the code frequently changes.