Agent skill

Progressive Web App

Progressive Web Apps with service workers, web manifest, offline support, installation prompts.

MITAuto-check passedMobile

Install Progressive Web App

skills CLI

$ npx skills add secondsky/claude-skills --skill progressive-web-app -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install secondsky/claude-skills progressive-web-app --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/secondsky/claude-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/progressive-web-app/skills/progressive-web-app .claude/skills/progressive-web-app && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "progressive-web-app" agent skill from https://github.com/secondsky/claude-skills/tree/main/plugins/progressive-web-app/skills/progressive-web-app into .claude/skills/progressive-web-app/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "progressive-web-app", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/secondsky/claude-skills/tree/main/plugins/progressive-web-app/skills/progressive-web-app

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add secondsky/claude-skills --skill progressive-web-app -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install secondsky/claude-skills progressive-web-app --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/secondsky/claude-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/plugins/progressive-web-app/skills/progressive-web-app .agents/skills/progressive-web-app && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "progressive-web-app" agent skill from https://github.com/secondsky/claude-skills/tree/main/plugins/progressive-web-app/skills/progressive-web-app into .agents/skills/progressive-web-app/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "progressive-web-app", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add secondsky/claude-skills --skill progressive-web-app -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install secondsky/claude-skills progressive-web-app --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/secondsky/claude-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/plugins/progressive-web-app/skills/progressive-web-app .cursor/skills/progressive-web-app && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "progressive-web-app" agent skill from https://github.com/secondsky/claude-skills/tree/main/plugins/progressive-web-app/skills/progressive-web-app into .cursor/skills/progressive-web-app/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "progressive-web-app", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/secondsky/claude-skills.git --path plugins/progressive-web-app/skills/progressive-web-app

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add secondsky/claude-skills --skill progressive-web-app -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install secondsky/claude-skills progressive-web-app --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/secondsky/claude-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/plugins/progressive-web-app/skills/progressive-web-app .gemini/skills/progressive-web-app && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "progressive-web-app" agent skill from https://github.com/secondsky/claude-skills/tree/main/plugins/progressive-web-app/skills/progressive-web-app into .gemini/skills/progressive-web-app/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "progressive-web-app", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install secondsky/claude-skills progressive-web-app

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add secondsky/claude-skills --skill progressive-web-app -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/secondsky/claude-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/plugins/progressive-web-app/skills/progressive-web-app .github/skills/progressive-web-app && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "progressive-web-app" agent skill from https://github.com/secondsky/claude-skills/tree/main/plugins/progressive-web-app/skills/progressive-web-app into .github/skills/progressive-web-app/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "progressive-web-app", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add secondsky/claude-skills --skill progressive-web-app -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install secondsky/claude-skills progressive-web-app --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/secondsky/claude-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/plugins/progressive-web-app/skills/progressive-web-app .opencode/skills/progressive-web-app && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "progressive-web-app" agent skill from https://github.com/secondsky/claude-skills/tree/main/plugins/progressive-web-app/skills/progressive-web-app into .opencode/skills/progressive-web-app/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "progressive-web-app", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: progressive-web-app
GitHub stars: 227
Token cost: ~621 tokens
SKILL.md length: 47 words
Files: 1
Skills in repo: 168
Repo updated: Sep 28, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Progressive Web Apps with service workers, web manifest, offline support, installation prompts.

Installable web apps
SKILL.md covers Web App Manifest, Service Worker, Install Prompt and Push Notifications, plus 1 more section
Needs VAPID_PUBLIC_KEY
Offline functionality

What it does

Progressive Web App is an agent skill from secondsky/claude-skills. Progressive Web Apps with service workers, web manifest, offline support, installation prompts. Use for installable web apps, offline functionality, push notifications, or encountering service worker registration, cache strategy, manifest configuration errors.

Its SKILL.md is about 620 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Mobile, covering Caching. The repository describes itself as: Production-ready skills for Claude Code CLI - Cloudflare, React, Tailwind v4, and AI integrations. The licence is MIT.

When your agent uses it

Installable web apps
Offline functionality
Push notifications
Encountering service worker registration

Example prompts

“/progressive-web-app”

Requirements

A credential in VAPID_PUBLIC_KEY

What it can do on your machine

Read from SKILL.md and the folder at commit 8837836. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are javascript and json).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names these keys or tokens, usually read from environment variables:
- VAPID_PUBLIC_KEY
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Progressive Web App loads about 621 tokens when it runs. Until then it costs about 70 tokens; SKILL.md has 47 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~70
When it runs · the whole SKILL.md, loaded when a task matches: ~621

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from secondsky/claude-skills at commit 8837836, republished under its MIT licence (© secondsky). 47 words, ~621 tokens.

Download SKILL.mdSave it as .claude/skills/progressive-web-app/SKILL.md (or your agent's skills folder).

name: progressive-web-app
description: Progressive Web Apps with service workers, web manifest, offline support, installation prompts. Use for installable web apps, offline functionality, push notifications, or encountering service worker registration, cache strategy, manifest configuration errors.
license: MIT

Progressive Web App (PWA)

Build web applications that work like native apps with offline support and installability.

Web App Manifest

json

{
  "name": "My Application",
  "short_name": "MyApp",
  "start_url": "/",
  "display": "standalone",
  "background_color": "#ffffff",
  "theme_color": "#000000",
  "icons": [
    { "src": "/icon-192.png", "sizes": "192x192", "type": "image/png" },
    { "src": "/icon-512.png", "sizes": "512x512", "type": "image/png" }
  ]
}

Service Worker

javascript

const CACHE_NAME = 'app-v1';
const STATIC_ASSETS = ['/', '/index.html', '/styles.css', '/app.js'];

// Install
self.addEventListener('install', event => {
  event.waitUntil(
    caches.open(CACHE_NAME).then(cache => cache.addAll(STATIC_ASSETS))
  );
});

// Fetch with cache-first strategy
self.addEventListener('fetch', event => {
  event.respondWith(
    caches.match(event.request).then(cached => {
      if (cached) return cached;

      return fetch(event.request).then(response => {
        if (response.status === 200) {
          const clone = response.clone();
          caches.open(CACHE_NAME).then(cache => cache.put(event.request, clone));
        }
        return response;
      });
    })
  );
});

Install Prompt

javascript

let deferredPrompt;

window.addEventListener('beforeinstallprompt', e => {
  e.preventDefault();
  deferredPrompt = e;
  showInstallButton();
});

async function installApp() {
  if (!deferredPrompt) return;
  deferredPrompt.prompt();
  const { outcome } = await deferredPrompt.userChoice;
  console.log('Install outcome:', outcome);
  deferredPrompt = null;
}

Push Notifications

javascript

async function subscribeToPush() {
  const registration = await navigator.serviceWorker.ready;
  const subscription = await registration.pushManager.subscribe({
    userVisibleOnly: true,
    applicationServerKey: VAPID_PUBLIC_KEY
  });
  await sendSubscriptionToServer(subscription);
}

PWA Checklist

HTTPS enabled
Web manifest configured
Service worker registered
Offline fallback page
Responsive design
Fast loading (<3s on 3G)
Installable

Files

Just SKILL.md in plugins/progressive-web-app/skills/progressive-web-app of secondsky/claude-skills.

Open the folder on GitHubat commit 8837836

Compare with similar skills

Progressive Web App next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Progressive Web App compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Progressive Web App this skillsecondsky/claude-skills	227	—	~621	Automated safety check: Pass	MIT	11 days ago
Pwa Expertcuriositech/some_claude_skills	243	—	~2.4k	Automated safety check: Notes	MIT	1 mo ago
Flutter Caching Databtwld/superdeck	130	—	~2k	Automated safety check: Pass	BSD-3-Clause	11 days ago
Weatherkitdpearson2699/swift-ios-skills	1.2k	—	~3.5k	Automated safety check: Pass	Custom licence	2 mo ago
Generatorsgustavscirulis/snapgrid	117	1 repos	~4k	Automated safety check: Notes	Custom licence	5 mo ago
Native Data FetchingCherryHQ/cherry-studio-app	4k	6 repos	~2.9k	Automated safety check: Notes	MIT	today

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Questions about Progressive Web App

What does Progressive Web App do?

Progressive Web Apps with service workers, web manifest, offline support, installation prompts. Progressive Web App is an agent skill from secondsky/claude-skills. Progressive Web Apps with service workers, web manifest, offline support, installation prompts.

When should I use Progressive Web App?

Progressive Web App fits situations like: installable web apps; offline functionality; push notifications; encountering service worker registration.

How do I install Progressive Web App in Claude Code?

Run `npx skills add secondsky/claude-skills --skill progressive-web-app -a claude-code`. Or copy the skill folder (plugins/progressive-web-app/skills/progressive-web-app in secondsky/claude-skills) into .claude/skills/progressive-web-app in your project. Claude Code loads it when a task matches its description.

How do I install Progressive Web App in Codex?

Run `npx skills add secondsky/claude-skills --skill progressive-web-app -a codex`. Or copy the skill folder (plugins/progressive-web-app/skills/progressive-web-app in secondsky/claude-skills) into .agents/skills/progressive-web-app in your project. Codex loads it when a task matches its description.

Can I use Progressive Web App in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add secondsky/claude-skills --skill progressive-web-app -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/progressive-web-app, .gemini/skills/progressive-web-app, .github/skills/progressive-web-app and .opencode/skills/progressive-web-app in your project.

What does Progressive Web App need to run?

Going by SKILL.md and its folder, Progressive Web App needs credentials named VAPID_PUBLIC_KEY. Our summary lists: A credential in VAPID_PUBLIC_KEY.

Does Progressive Web App access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Progressive Web App safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Progressive Web App use?

Progressive Web App is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Progressive Web App use?

About 621 tokens (SKILL.md is roughly 2.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Progressive Web App?

Skills that share tags, products or a category with Progressive Web App: Pwa Expert (curiositech/some_claude_skills, 243 stars), Flutter Caching Data (btwld/superdeck, 130 stars), Weatherkit (dpearson2699/swift-ios-skills, 1.2k stars) and Generators (gustavscirulis/snapgrid, 117 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Progressive Web App?

secondsky (a GitHub user) maintains it in secondsky/claude-skills, which has 227 GitHub stars. The repository holds 168 skills in this directory. The repository was last updated on September 28, 2026.

Source: secondsky/claude-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Progressive Web App

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Progressive Web App (PWA)

Web App Manifest

Service Worker

Install Prompt

Push Notifications

PWA Checklist

Files

Compare with similar skills

Similar skills

More from secondsky/claude-skills

Related

Questions about Progressive Web App