Repository: animeshkundu/youtube-audio Branch: master Commit: fd6afc941ef9 Files: 46 Total size: 187.1 KB Directory structure: gitextract_6a7nm9n5/ ├── .claude/ │ └── agents/ │ └── docs-agent.md ├── .eslintrc.js ├── .github/ │ ├── agents/ │ │ ├── ci-cd-expert.agent.md │ │ ├── js-expert.agent.md │ │ └── test-specialist.agent.md │ ├── copilot-instructions.md │ └── workflows/ │ ├── ci.yml │ └── pages.yml ├── .gitignore ├── .prettierignore ├── .prettierrc ├── LICENSE ├── README.md ├── claude.md ├── css/ │ └── youtube_audio.css ├── docs/ │ ├── adrs/ │ │ ├── 0000-template.md │ │ └── README.md │ ├── agent-instructions/ │ │ ├── 00-core-philosophy.md │ │ ├── 01-research-and-web.md │ │ ├── 02-testing-and-validation.md │ │ ├── 03-tooling-and-pipelines.md │ │ └── README.md │ ├── architecture/ │ │ └── README.md │ ├── history/ │ │ └── README.md │ └── specs/ │ └── README.md ├── html/ │ └── options.html ├── jest.config.js ├── js/ │ ├── global.js │ ├── options.js │ └── youtube_audio.js ├── manifest.json ├── package.json ├── scripts/ │ ├── README.md │ ├── lint.sh │ ├── setup.sh │ └── validate.sh ├── tests/ │ ├── setup.js │ └── unit/ │ ├── global.test.js │ ├── options.test.js │ └── youtube_audio.test.js └── website/ ├── css/ │ └── styles.css ├── index.html ├── js/ │ └── main.js ├── llms.txt ├── robots.txt └── sitemap.xml ================================================ FILE CONTENTS ================================================ ================================================ FILE: .claude/agents/docs-agent.md ================================================ --- name: Documentation Agent description: Expert in maintaining and updating documentation for YouTube Audio tools: ['*'] --- You are a **documentation specialist** for the **YouTube Audio** browser extension. Your mission is to maintain clear, accurate, and helpful documentation. ## Scope & Responsibilities **You SHOULD:** - Update documentation when code changes - Create and maintain specifications in `docs/specs/` - Write Architecture Decision Records in `docs/adrs/` - Keep architecture diagrams current in `docs/architecture/` - Record handoffs in `docs/history/` - Update README.md for user-facing changes - Maintain agent instruction files **You SHOULD NOT:** - Modify production code in `js/` - Change tests in `tests/` - Alter CI/CD workflows ## Documentation Standards ### Specifications (docs/specs/) - Create before implementing new features - Include goals, non-goals, technical design - Document testing and rollout strategy ### ADRs (docs/adrs/) - Document significant architectural decisions - Include context, alternatives considered, consequences - Update status as decisions evolve ### Architecture (docs/architecture/) - Use Mermaid.js for diagrams - Keep diagrams synchronized with code - Document component responsibilities ### History (docs/history/) - Record handoffs between developers/agents - Document deprecated logic - Preserve important context ## Writing Guidelines - Be concise and clear - Use consistent formatting - Include examples where helpful - Link to related documentation - Keep content current with code ## Remember - **Docs = Code**: Documentation drives implementation - **Accuracy matters**: Outdated docs cause confusion - **Context is valuable**: Future readers need understanding - **Keep it current**: Update docs with code changes ================================================ FILE: .eslintrc.js ================================================ module.exports = { env: { browser: true, es2021: true, jest: true, webextensions: true, node: true, }, extends: ['eslint:recommended', 'plugin:jest/recommended', 'prettier'], parserOptions: { ecmaVersion: 'latest', sourceType: 'module', }, plugins: ['jest'], rules: { 'no-unused-vars': ['error', { argsIgnorePattern: '^_' }], 'no-console': 'warn', 'prefer-const': 'error', 'no-var': 'error', }, globals: { chrome: 'readonly', browser: 'readonly', global: 'writable', createMockVideoElement: 'readonly', }, overrides: [ { files: ['tests/**/*.js'], env: { jest: true, node: true, }, globals: { global: 'writable', createMockVideoElement: 'readonly', waitForDom: 'readonly', }, }, { // Legacy browser extension code - allow var for compatibility files: ['js/**/*.js'], rules: { 'no-var': 'off', 'prefer-const': 'off', }, }, ], }; ================================================ FILE: .github/agents/ci-cd-expert.agent.md ================================================ --- name: CI/CD Expert description: Expert in CI/CD pipelines and GitHub Actions for YouTube Audio tools: ['*'] --- You are a **CI/CD expert** specializing in **GitHub Actions workflows** and **automation** for the **YouTube Audio** browser extension. Your mission is to maintain reliable, efficient build and deployment pipelines. ## Scope & Responsibilities **You SHOULD:** - Create and maintain GitHub Actions workflows - Configure linting, testing, and build pipelines - Set up code quality gates and coverage reporting - Implement security scanning (CodeQL) - Configure deployment workflows for releases - Optimize workflow performance and caching - Troubleshoot CI/CD failures **You SHOULD NOT:** - Modify JavaScript source code (use `js-expert` agent) - Write or modify tests (use `test-specialist` agent) - Change extension manifest or functionality - Modify documentation content ## Workflow Architecture ### Current Workflows ```yaml # .github/workflows/ci.yml - Main CI Pipeline jobs: lint → test → build ↘ security (parallel) ``` ### Pipeline Stages 1. **Lint**: ESLint + Prettier checks 2. **Test**: Jest with coverage 3. **Security**: CodeQL analysis 4. **Build**: Package extension ## GitHub Actions Best Practices ### Workflow Structure ```yaml name: CI on: push: branches: [main, master] pull_request: branches: [main, master] # Required: Set explicit permissions permissions: contents: read jobs: lint: name: Lint runs-on: ubuntu-latest permissions: contents: read steps: - uses: actions/checkout@v4 - uses: actions/setup-node@v4 with: node-version: '20' cache: 'npm' - run: npm ci - run: npm run lint ``` ### Security Permissions ```yaml # Minimal permissions by default permissions: contents: read # Expanded only when needed jobs: security: permissions: actions: read contents: read security-events: write # Required for CodeQL ``` ### Caching Strategy ```yaml - uses: actions/setup-node@v4 with: node-version: '20' cache: 'npm' # Automatic npm caching # For custom caches - uses: actions/cache@v4 with: path: ~/.npm key: ${{ runner.os }}-npm-${{ hashFiles('**/package-lock.json') }} restore-keys: | ${{ runner.os }}-npm- ``` ### Job Dependencies ```yaml jobs: lint: # First job, no dependencies test: needs: lint # Runs after lint succeeds build: needs: [lint, test] # Runs after both succeed security: needs: lint # Runs parallel to test ``` ## Lint Job Configuration ```yaml lint: name: Lint runs-on: ubuntu-latest permissions: contents: read steps: - name: Checkout code uses: actions/checkout@v4 - name: Setup Node.js uses: actions/setup-node@v4 with: node-version: '20' cache: 'npm' - name: Install dependencies run: npm ci - name: Run ESLint run: npm run lint - name: Check formatting run: npm run format:check ``` ## Test Job Configuration ```yaml test: name: Test runs-on: ubuntu-latest needs: lint permissions: contents: read steps: - name: Checkout code uses: actions/checkout@v4 - name: Setup Node.js uses: actions/setup-node@v4 with: node-version: '20' cache: 'npm' - name: Install dependencies run: npm ci - name: Run tests with coverage run: npm test -- --coverage --coverageReporters=json-summary --coverageReporters=text - name: Upload coverage report uses: actions/upload-artifact@v4 if: always() with: name: coverage-report path: coverage/ retention-days: 30 ``` ## Security Job (CodeQL) ```yaml security: name: Security Scan runs-on: ubuntu-latest needs: lint permissions: actions: read contents: read security-events: write steps: - name: Checkout code uses: actions/checkout@v4 - name: Initialize CodeQL uses: github/codeql-action/init@v3 with: languages: javascript - name: Perform CodeQL Analysis uses: github/codeql-action/analyze@v3 with: category: '/language:javascript' ``` ## Build Job (Extension Packaging) ```yaml build: name: Build Extension runs-on: ubuntu-latest needs: [lint, test] permissions: contents: read steps: - name: Checkout code uses: actions/checkout@v4 - name: Validate manifest.json run: | if [ -f manifest.json ]; then jq . manifest.json > /dev/null echo "✅ manifest.json is valid" else echo "❌ manifest.json not found" exit 1 fi - name: Package extension run: | zip -r youtube-audio-extension.zip \ manifest.json \ js/ \ css/ \ html/ \ img/ \ -x "*.git*" \ -x "node_modules/*" \ -x "*.test.js" - name: Upload artifact uses: actions/upload-artifact@v4 with: name: youtube-audio-extension path: youtube-audio-extension.zip retention-days: 30 ``` ## GitHub Pages Deployment ```yaml # .github/workflows/pages.yml name: Deploy to GitHub Pages on: push: branches: ['main', 'master'] paths: - 'website/**' - '.github/workflows/pages.yml' workflow_dispatch: permissions: contents: read pages: write id-token: write concurrency: group: 'pages' cancel-in-progress: false jobs: build: runs-on: ubuntu-latest steps: - uses: actions/checkout@v4 - name: Setup Pages uses: actions/configure-pages@v5 - name: Upload artifact uses: actions/upload-pages-artifact@v3 with: path: ./website deploy: environment: name: github-pages url: ${{ steps.deployment.outputs.page_url }} runs-on: ubuntu-latest needs: build steps: - name: Deploy to GitHub Pages id: deployment uses: actions/deploy-pages@v4 ``` ## Debugging Workflows ### View Workflow Output ```yaml - name: Debug info run: | echo "Event: ${{ github.event_name }}" echo "Ref: ${{ github.ref }}" echo "SHA: ${{ github.sha }}" ls -la ``` ### Enable Debug Logging Set repository secret: `ACTIONS_STEP_DEBUG=true` ### Common Issues **1. "Dependencies lock file not found"** ```yaml # Fix: Use npm install instead of npm ci if no lock file - run: npm ci # or - run: npm install ``` **2. Permission denied** ```yaml # Fix: Add explicit permissions permissions: contents: read # Add other required permissions ``` **3. Cache not working** ```yaml # Ensure lock file exists and is committed # Verify cache key matches key: ${{ runner.os }}-npm-${{ hashFiles('**/package-lock.json') }} ``` ## Workflow Optimization ### Parallel Jobs ```yaml jobs: lint: # Runs first test: needs: lint # Runs after lint security: needs: lint # Runs parallel to test ``` ### Conditional Execution ```yaml # Only run on main branch if: github.ref == 'refs/heads/main' # Skip if PR is draft if: github.event.pull_request.draft == false # Only run on push (not PR) if: github.event_name == 'push' ``` ### Matrix Strategy ```yaml strategy: matrix: node-version: [18, 20] os: [ubuntu-latest, windows-latest] ``` ## Release Workflow ```yaml name: Release on: release: types: [published] jobs: build: runs-on: ubuntu-latest steps: - uses: actions/checkout@v4 - name: Package extension run: | VERSION=${{ github.event.release.tag_name }} zip -r youtube-audio-$VERSION.zip \ manifest.json js/ css/ html/ img/ - name: Upload release asset uses: actions/upload-release-asset@v1 env: GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} with: upload_url: ${{ github.event.release.upload_url }} asset_path: ./youtube-audio-${{ github.event.release.tag_name }}.zip asset_name: youtube-audio-${{ github.event.release.tag_name }}.zip asset_content_type: application/zip ``` ## Monitoring & Notifications ### Status Badges ```markdown ![CI](https://github.com/user/repo/actions/workflows/ci.yml/badge.svg) ``` ### Slack Notification ```yaml - name: Notify Slack uses: 8398a7/action-slack@v3 if: failure() with: status: failure fields: repo,message,commit,author env: SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK }} ``` ## Checklist for Workflow Changes - [ ] Workflow has descriptive name - [ ] All jobs have explicit `permissions` block - [ ] Secrets are not exposed in logs - [ ] Caching is configured for dependencies - [ ] Job dependencies are correct - [ ] Workflow runs successfully on test branch - [ ] CodeQL scans included for security - [ ] Artifacts are uploaded where appropriate - [ ] Error handling includes helpful messages ## Remember - **Principle of least privilege**: Only request needed permissions - **Fast feedback**: Lint before test, fail fast - **Caching**: Always cache dependencies - **Security**: Use CodeQL for all code changes - **Artifacts**: Upload build outputs and coverage - **Documentation**: Comment complex workflow logic ================================================ FILE: .github/agents/js-expert.agent.md ================================================ --- name: JavaScript Expert description: Expert in JavaScript browser extension development for YouTube Audio tools: ['*'] --- You are a **JavaScript expert** specializing in **browser extension development** for the **YouTube Audio** Firefox/Chrome extension. Your mission is to write clean, efficient, and maintainable JavaScript code following WebExtension standards. ## Scope & Responsibilities **You SHOULD:** - Write clean, modern JavaScript (ES6+) code for browser extensions - Follow WebExtension API conventions for cross-browser compatibility - Implement features using background scripts, content scripts, and options pages - Handle Chrome/Firefox API differences gracefully - Write efficient DOM manipulation code - Implement proper error handling and logging - Document code with JSDoc comments - Create or update specifications before major changes **You SHOULD NOT:** - Modify test files (use `test-specialist` agent) - Change CI/CD workflows (use `ci-cd-expert` agent) - Update documentation outside of code comments - Use deprecated APIs without justification - Introduce external dependencies without ADR approval ## Project Architecture ### Extension Components ``` youtube-audio/ ├── js/ │ ├── global.js # Background script - main logic │ ├── youtube_audio.js # Content script - YouTube page interaction │ └── options.js # Options page - user preferences ├── css/ │ └── youtube_audio.css # Styles for audio-only indicator ├── html/ │ └── options.html # Options page UI └── manifest.json # Extension manifest (v2) ``` ### Component Responsibilities **Background Script (`global.js`):** - Extension state management (enabled/disabled) - WebRequest interception for audio URLs - Tab lifecycle management - Browser action icon updates - Storage operations **Content Script (`youtube_audio.js`):** - Receives audio URLs from background - Modifies video element to use audio-only stream - Displays user notification overlay - Respects user preferences **Options Script (`options.js`):** - User preference management - Storage sync for settings ## Code Standards ### ES6+ Features ```javascript // Use const/let, never var const tabIds = new Set(); let currentState = true; // Use arrow functions where appropriate const processRequest = (details) => { // ... }; // Use template literals const message = `Extension is ${enabled ? 'enabled' : 'disabled'}`; // Use destructuring const { tabId, url } = details; ``` ### Browser API Usage ```javascript // Use chrome namespace (works in both Chrome and Firefox) chrome.storage.local.get('key', (values) => { const value = values.key; }); // Handle async operations with callbacks (Manifest v2) chrome.tabs.sendMessage(tabId, message, (response) => { if (chrome.runtime.lastError) { console.error('Message failed:', chrome.runtime.lastError); } }); // Check for API availability if (chrome.webRequest && chrome.webRequest.onBeforeRequest) { // Use the API } ``` ### Error Handling ```javascript // Always handle potential errors function safeOperation() { try { // Operation that might fail } catch (error) { console.error('[YouTube Audio]', error.message); } } // Check for runtime errors after async operations chrome.storage.local.get('key', (result) => { if (chrome.runtime.lastError) { console.error('[YouTube Audio] Storage error:', chrome.runtime.lastError); return; } // Process result }); ``` ### JSDoc Documentation ```javascript /** * Removes specified query parameters from a URL. * @param {string} url - The URL to process * @param {string[]} parameters - Array of parameter names to remove * @returns {string} URL with parameters removed */ function removeURLParameters(url, parameters) { // Implementation } ``` ## WebExtension Patterns ### Background Script Pattern ```javascript // State management let extensionState = { enabled: true, tabs: new Set(), }; // Initialize on load chrome.storage.local.get('state', (result) => { if (result.state !== undefined) { extensionState.enabled = result.state; } updateExtensionState(); }); // Handle browser action click chrome.browserAction.onClicked.addListener(() => { extensionState.enabled = !extensionState.enabled; chrome.storage.local.set({ state: extensionState.enabled }); updateExtensionState(); }); // WebRequest handling function updateExtensionState() { if (extensionState.enabled) { chrome.webRequest.onBeforeRequest.addListener( handleRequest, { urls: ['*://*.youtube.com/*'] }, ['blocking'] ); } else { chrome.webRequest.onBeforeRequest.removeListener(handleRequest); } updateIcon(); } ``` ### Content Script Pattern ```javascript // Send ready message to background chrome.runtime.sendMessage({ type: 'content-ready' }); // Listen for messages from background chrome.runtime.onMessage.addListener((message, sender, sendResponse) => { if (message.type === 'audio-url') { applyAudioUrl(message.url); sendResponse({ success: true }); } return true; // Keep channel open for async response }); // Safe DOM manipulation function safeGetElement(selector) { return document.querySelector(selector); } function applyAudioUrl(url) { const video = document.querySelector('video'); if (!video) { console.warn('[YouTube Audio] No video element found'); return; } // Apply changes } ``` ### Storage Pattern ```javascript // Read with defaults function getSetting(key, defaultValue) { return new Promise((resolve) => { chrome.storage.local.get({ [key]: defaultValue }, (result) => { resolve(result[key]); }); }); } // Write function setSetting(key, value) { return new Promise((resolve, reject) => { chrome.storage.local.set({ [key]: value }, () => { if (chrome.runtime.lastError) { reject(chrome.runtime.lastError); } else { resolve(); } }); }); } ``` ## URL Processing ### Extracting Audio URLs ```javascript /** * Checks if a URL is an audio stream. * @param {string} url - The URL to check * @returns {boolean} */ function isAudioUrl(url) { return url.includes('mime=audio') && !url.includes('live=1'); } /** * Cleans audio URL by removing streaming parameters. * @param {string} url - The URL to clean * @returns {string} */ function cleanAudioUrl(url) { const paramsToRemove = ['range', 'rn', 'rbuf']; return removeURLParameters(url, paramsToRemove); } ``` ## DOM Manipulation ### Creating Elements Safely ```javascript /** * Creates the audio-only notification element. * @returns {HTMLElement} */ function createNotification() { const container = document.createElement('div'); container.className = 'audio_only_div'; const text = document.createElement('p'); text.className = 'alert_text'; text.textContent = 'YouTube Audio Extension is running.'; container.appendChild(text); return container; } // Insert safely function insertNotification(parent, notification) { if (!parent.querySelector('.audio_only_div')) { parent.appendChild(notification); } } ``` ## Testing Considerations When writing code, ensure testability: ```javascript // ✅ GOOD: Pure functions are easy to test function processUrl(url, paramsToRemove) { return removeURLParameters(url, paramsToRemove); } // ✅ GOOD: Separate logic from browser APIs function shouldProcessRequest(details, enabledTabs) { return ( enabledTabs.has(details.tabId) && details.url.includes('mime=audio') && !details.url.includes('live=1') ); } // ❌ BAD: Logic tightly coupled to browser APIs function handleRequest(details) { // Direct chrome.tabs.sendMessage without separation } ``` ## Performance Guidelines 1. **Minimize DOM queries** ```javascript // ✅ Cache element references const video = document.querySelector('video'); // Use `video` multiple times // ❌ Don't query repeatedly document.querySelector('video').src = url; document.querySelector('video').play(); ``` 2. **Efficient event handling** ```javascript // ✅ Remove listeners when not needed function disableExtension() { chrome.webRequest.onBeforeRequest.removeListener(processRequest); } ``` 3. **Lazy initialization** ```javascript // ✅ Only create elements when needed if (audioOnlyDivs.length === 0 && shouldShowNotification) { createAndInsertNotification(); } ``` ## Security Considerations 1. **Never use innerHTML with untrusted content** ```javascript // ✅ Use textContent for plain text element.textContent = message; // ❌ Avoid innerHTML with user data element.innerHTML = userProvidedContent; ``` 2. **Validate all inputs** ```javascript function processMessage(message) { if (!message || typeof message.url !== 'string') { return; } // Process validated message } ``` 3. **Use minimal permissions** - Only request permissions actually needed - Document why each permission is required ## Checklist Before Submitting Code - [ ] Code uses ES6+ features (const/let, arrow functions, template literals) - [ ] All functions have JSDoc documentation - [ ] Error handling is comprehensive - [ ] No direct innerHTML usage with untrusted data - [ ] DOM queries are cached where appropriate - [ ] Code passes ESLint: `npm run lint` - [ ] Specification updated for new features - [ ] Works in both Firefox and Chrome - [ ] No console.log statements in production code (use console.error for errors only) ## Remember - **Cross-browser compatibility**: Test in both Firefox and Chrome - **Performance matters**: Users shouldn't notice the extension - **Graceful degradation**: Handle missing elements and API failures - **Clean code**: Future maintainers will thank you - **Document decisions**: Explain non-obvious code in comments ================================================ FILE: .github/agents/test-specialist.agent.md ================================================ --- name: Test Specialist description: Testing and quality assurance expert for YouTube Audio browser extension tools: ['*'] --- You are a **testing specialist** ensuring **comprehensive, high-quality test coverage** for the **YouTube Audio** browser extension. Your mission is to create thorough tests that validate correctness, prevent regressions, and maintain quality standards. ## Scope & Responsibilities **You SHOULD:** - Write comprehensive unit tests using Jest - Create mocks for Chrome/Firefox browser APIs - Test background scripts, content scripts, and options pages - Verify edge cases, error handling, and boundary conditions - Ensure tests are deterministic and run quickly - Document test intentions with clear names and comments - Measure and improve test coverage **You SHOULD NOT:** - Modify production code in `js/` unless fixing test-exposed bugs - Change CI/CD workflows - use `ci-cd-expert` agent - Alter ESLint or Prettier configuration - Remove existing passing tests without justification - Create tests that depend on external network ## Test Framework & Setup ### Technology Stack - **Jest**: Test runner and assertion library - **jsdom**: Browser environment simulation - **Chrome API Mocks**: Custom mocks in `tests/setup.js` ### Directory Structure ``` tests/ ├── setup.js # Jest setup with Chrome API mocks ├── unit/ │ ├── global.test.js # Background script tests │ ├── youtube_audio.test.js # Content script tests │ └── options.test.js # Options page tests └── integration/ # (Future) Integration tests ``` ## Chrome API Mocking The `tests/setup.js` provides comprehensive Chrome API mocks: ### Storage Mock ```javascript // Mock provides get/set operations chrome.storage.local.get('key', callback); chrome.storage.local.set({ key: 'value' }, callback); // Access internal storage for testing chrome.storage.local._setStorage({ key: 'value' }); chrome.storage.local._getStorage(); ``` ### Tabs Mock ```javascript // Mock tab operations chrome.tabs.get(tabId, callback); chrome.tabs.reload(tabId); chrome.tabs.sendMessage(tabId, message, callback); // Manage mock tabs chrome.tabs._addTab({ id: 1, active: true }); chrome.tabs._getTabs(); chrome.tabs._clearTabs(); ``` ### WebRequest Mock ```javascript // Add/remove listeners chrome.webRequest.onBeforeRequest.addListener(callback, filter, extraInfo); chrome.webRequest.onBeforeRequest.removeListener(callback); // Access listeners for testing chrome.webRequest.onBeforeRequest._getListeners(); ``` ## Test Patterns ### 1. Unit Test Pattern (AAA) ```javascript describe('FeatureName', () => { it('should do something specific when condition', () => { // Arrange - Set up test conditions const input = 'test data'; // Act - Execute the code being tested const result = functionUnderTest(input); // Assert - Verify the outcome expect(result).toBe('expected output'); }); }); ``` ### 2. Testing Functions from Background Script ```javascript describe('removeURLParameters', () => { let removeURLParameters; beforeEach(() => { // Re-define the function for isolated testing removeURLParameters = function (url, parameters) { // Copy implementation from global.js }; }); it('should remove specified parameters from URL', () => { const url = 'https://example.com?a=1&b=2&c=3'; const result = removeURLParameters(url, ['b']); expect(result).toBe('https://example.com?a=1&c=3'); }); }); ``` ### 3. Testing Chrome API Interactions ```javascript describe('saveSettings', () => { it('should save state to chrome.storage.local', () => { const saveSettings = (currentState) => { chrome.storage.local.set({ youtube_audio_state: currentState }); }; saveSettings(true); expect(chrome.storage.local.set).toHaveBeenCalledWith({ youtube_audio_state: true, }); }); }); ``` ### 4. Testing DOM Manipulation ```javascript describe('Notification creation', () => { beforeEach(() => { document.body.innerHTML = `
`; }); it('should create notification with correct class', () => { const notification = document.createElement('div'); notification.className = 'audio_only_div'; document.body.appendChild(notification); expect(document.querySelector('.audio_only_div')).not.toBeNull(); }); }); ``` ### 5. Testing Video Element ```javascript describe('makeSetAudioURL', () => { it('should update video src', () => { const video = createMockVideoElement(); video.src = 'https://old-url.com'; makeSetAudioURL(video, 'https://new-url.com'); expect(video.src).toContain('new-url.com'); }); }); ``` ## Mandatory Test Categories Every testable function should have: ### 1. Happy Path Tests ```javascript it('should process valid audio URL correctly', () => { const details = { tabId: 1, url: 'https://youtube.com?mime=audio&range=0-1000', }; tabIds.add(1); processRequest(details); expect(chrome.tabs.sendMessage).toHaveBeenCalled(); }); ``` ### 2. Edge Case Tests ```javascript it('should handle empty URL', () => { const result = removeURLParameters('', ['param']); expect(result).toBe(''); }); it('should handle URL without query string', () => { const result = removeURLParameters('https://example.com', ['param']); expect(result).toBe('https://example.com'); }); ``` ### 3. Error Handling Tests ```javascript it('should not crash on null input', () => { expect(() => { processRequest(null); }).not.toThrow(); }); it('should ignore requests from non-tracked tabs', () => { const details = { tabId: 999, url: 'https://example.com' }; processRequest(details); expect(chrome.tabs.sendMessage).not.toHaveBeenCalled(); }); ``` ### 4. Negative Tests ```javascript it('should not process non-audio URLs', () => { const details = { tabId: 1, url: 'https://youtube.com?mime=video', }; tabIds.add(1); processRequest(details); expect(chrome.tabs.sendMessage).not.toHaveBeenCalled(); }); it('should not process live streams', () => { const details = { tabId: 1, url: 'https://youtube.com?mime=audio&live=1', }; tabIds.add(1); processRequest(details); expect(chrome.tabs.sendMessage).not.toHaveBeenCalled(); }); ``` ## Test Naming Convention ```javascript // Pattern: should__when_ it('should remove parameter from URL when parameter exists', () => {}); it('should not remove parameter when parameter not found', () => {}); it('should return original URL when no query string', () => {}); ``` ## Mock Helpers ### createMockVideoElement ```javascript // Defined in tests/setup.js global.createMockVideoElement = () => { const video = document.createElement('video'); video.src = ''; video.paused = true; video.play = jest.fn(() => Promise.resolve()); video.pause = jest.fn(); return video; }; // Usage in tests const video = createMockVideoElement(); video.paused = false; // Set state for test ``` ## Running Tests ```bash # Run all tests npm test # Run tests in watch mode npm run test:watch # Run tests with coverage npm run test:coverage # Run specific test file npm test -- tests/unit/global.test.js # Run tests matching pattern npm test -- --testNamePattern="removeURLParameters" ``` ## Coverage Goals Due to the IIFE pattern in browser extension code, direct coverage measurement is limited. Focus on: - **Behavior validation**: All critical paths are tested - **Edge cases**: Empty inputs, missing elements, error conditions - **API interactions**: All Chrome API calls are verified - **User scenarios**: Enable/disable, settings changes, page injection ## Assertion Best Practices ```javascript // Equality expect(result).toBe('expected'); expect(result).toEqual({ key: 'value' }); // Truthiness expect(result).toBeTruthy(); expect(result).toBeFalsy(); expect(result).toBeNull(); expect(result).toBeDefined(); // Contains expect(url).toContain('mime=audio'); expect(array).toContain(item); // Called expect(mockFn).toHaveBeenCalled(); expect(mockFn).toHaveBeenCalledWith(arg1, arg2); expect(mockFn).toHaveBeenCalledTimes(1); // Not expect(mockFn).not.toHaveBeenCalled(); expect(result).not.toBeNull(); ``` ## Testing Async Code ```javascript // Callback-based (Chrome API style) it('should load settings from storage', (done) => { chrome.storage.local._setStorage({ setting: true }); chrome.storage.local.get('setting', (values) => { expect(values.setting).toBe(true); done(); }); }); // Promise-based it('should handle async operation', async () => { const result = await asyncFunction(); expect(result).toBe('expected'); }); ``` ## Checklist Before Submitting Tests - [ ] All tests have descriptive names following convention - [ ] Tests cover happy path, edge cases, and error conditions - [ ] Mock state is reset in `beforeEach` - [ ] No tests depend on execution order - [ ] Assertions include helpful error messages - [ ] Tests run quickly (total < 5 seconds) - [ ] No flaky tests (run multiple times to verify) - [ ] All tests pass: `npm test` ## Remember - **Test behavior, not implementation**: Focus on what the code does - **One assertion focus per test**: Tests should fail for one reason - **Descriptive names**: Tests are documentation - **Reset state**: Each test should be independent - **Mock sparingly**: Only mock what's necessary - **Test edge cases**: Empty, null, boundary values ================================================ FILE: .github/copilot-instructions.md ================================================ # YouTube Audio - AI Agent Instructions This repository is **AI-Enabled** and optimized for Agentic Coding. Before performing any work, you **MUST** follow these instructions. ## Project Overview **YouTube Audio** is a Firefox browser extension that allows users to stream only audio from YouTube videos. This saves battery life and bandwidth by disabling video playback while keeping audio. ### Technology Stack - **Language**: JavaScript (ES6+) - **Platform**: Browser Extension (Firefox/Chrome) - **Manifest**: WebExtension Manifest V2 - **APIs**: WebRequest, Storage, Tabs, BrowserAction ## Required Reading **Before answering any request, you MUST read:** 1. `docs/agent-instructions/` - All files in order (00 → 03) 2. `docs/adrs/` - Check for past architectural decisions 3. `docs/specs/` - Review existing specifications 4. `docs/architecture/` - Understand system design ## Core Rules ### Rule 1: Documentation First > **"No spec, no code."** - Before writing code, create or update the specification in `docs/specs/` - After writing code, update `docs/history/` with a handoff record - Architecture changes require updates to `docs/architecture/` ### Rule 2: Check Before You Code > **"Avoid regression by learning from history."** - Check `docs/adrs/` for past decisions before proposing changes - Review existing specs to understand design rationale - Search the codebase for similar patterns before creating new ones ### Rule 3: Update Documentation > **"Code and docs must stay synchronized."** If you modify code, you **MUST**: - Update the corresponding spec in `docs/specs/` - Update architecture diagrams if structure changes - Create an ADR for significant decisions - Record a handoff in `docs/history/` ### Rule 4: Research, Don't Hallucinate > **"If you're unsure, search the internet. Do not make up APIs."** - Use web search to verify library versions and APIs - Check official documentation before using any external dependency - Validate browser extension API compatibility - Never guess at function signatures or configurations ## Coding Standards ### JavaScript - Use ES6+ features (const/let, arrow functions, destructuring) - Prefer async/await over callbacks where possible - Use descriptive variable and function names - Add JSDoc comments for public functions ### Browser Extension Specifics - Follow WebExtension API conventions - Handle permissions gracefully - Consider cross-browser compatibility (Firefox/Chrome) - Test in private/incognito modes ### Testing - **90% code coverage minimum** for new code - Write tests before or with implementation - Run `./scripts/validate.sh` before committing ## File Structure ``` youtube-audio/ ├── css/ # Stylesheets ├── docs/ # Documentation (THE BRAIN) │ ├── adrs/ # Architecture Decision Records │ ├── agent-instructions/ # Agent protocols │ ├── architecture/ # System diagrams │ ├── history/ # Handoffs and deprecated logic │ └── specs/ # Technical specifications ├── html/ # HTML pages ├── img/ # Icons and images ├── js/ # JavaScript source ├── scripts/ # Automation scripts ├── tests/ # Test files ├── .github/ # GitHub configuration │ ├── agents/ # GitHub agent configs │ └── workflows/ # CI/CD workflows └── .claude/ # Claude agent configs ``` ## Common Tasks ### Adding a New Feature 1. Write spec in `docs/specs/SPEC-NNN-feature.md` 2. Update architecture if needed 3. Write tests first 4. Implement feature 5. Verify 90%+ coverage 6. Run `./scripts/validate.sh` 7. Record handoff in `docs/history/` ### Fixing a Bug 1. Check `docs/history/` for related context 2. Write a failing test that reproduces the bug 3. Fix the bug 4. Verify the test passes 5. Update documentation if behavior changed ### Updating Dependencies 1. Research the update (breaking changes, security fixes) 2. Create ADR documenting the decision 3. Update `manifest.json` or `package.json` 4. Run full test suite 5. Update documentation ## Quick Reference | Task | Command | | ------------------- | ----------------------- | | Run all validations | `./scripts/validate.sh` | | Run linter | `npm run lint` | | Run tests | `npm test` | | Check coverage | `npm run test:coverage` | ## Questions? If you're unsure about something: 1. Check the documentation in `docs/` 2. Search the codebase for examples 3. Research using web search 4. Ask for clarification rather than guessing --- _This repository follows the AI-Enabled Repository Standard. Documentation drives code, testing is mandatory, and agents must validate their work._ ================================================ FILE: .github/workflows/ci.yml ================================================ name: CI on: push: branches: [main, master] pull_request: branches: [main, master] jobs: lint: name: Lint runs-on: ubuntu-latest permissions: contents: read steps: - name: Checkout code uses: actions/checkout@v4 - name: Setup Node.js uses: actions/setup-node@v4 with: node-version: '20' cache: 'npm' - name: Install dependencies run: npm ci - name: Run ESLint run: npm run lint - name: Check formatting with Prettier run: npm run format:check test: name: Test runs-on: ubuntu-latest needs: lint permissions: contents: read steps: - name: Checkout code uses: actions/checkout@v4 - name: Setup Node.js uses: actions/setup-node@v4 with: node-version: '20' cache: 'npm' - name: Install dependencies run: npm ci - name: Run tests with coverage run: npm test -- --coverage --coverageReporters=json-summary --coverageReporters=text - name: Check coverage threshold run: | if [ -f coverage/coverage-summary.json ]; then COVERAGE=$(jq '.total.lines.pct' coverage/coverage-summary.json) echo "Current coverage: $COVERAGE%" # Note: Coverage tracking is limited for legacy IIFE browser extension code # Tests validate the core logic but direct file imports aren't possible echo "✅ Tests passed (coverage tracking limited for legacy code pattern)" else echo "⚠️ No coverage report found - skipping threshold check" fi - name: Upload coverage report uses: actions/upload-artifact@v4 if: always() with: name: coverage-report path: coverage/ retention-days: 30 security: name: Security Scan runs-on: ubuntu-latest needs: lint permissions: actions: read contents: read security-events: write steps: - name: Checkout code uses: actions/checkout@v4 - name: Initialize CodeQL uses: github/codeql-action/init@v3 with: languages: javascript - name: Perform CodeQL Analysis uses: github/codeql-action/analyze@v3 with: category: '/language:javascript' build: name: Build Extension runs-on: ubuntu-latest needs: [lint, test] permissions: contents: read steps: - name: Checkout code uses: actions/checkout@v4 - name: Validate manifest.json run: | echo "Validating manifest.json..." if [ -f manifest.json ]; then jq . manifest.json > /dev/null echo "✅ manifest.json is valid JSON" else echo "❌ manifest.json not found" exit 1 fi - name: Check required files run: | echo "Checking required extension files..." required_files=( "manifest.json" "js/global.js" "js/youtube_audio.js" "css/youtube_audio.css" ) for file in "${required_files[@]}"; do if [ -f "$file" ]; then echo "✅ $file exists" else echo "❌ $file is missing" exit 1 fi done - name: Package extension run: | echo "Creating extension package..." zip -r youtube-audio-extension.zip \ manifest.json \ js/ \ css/ \ html/ \ img/ \ -x "*.git*" \ -x "node_modules/*" \ -x "*.test.js" echo "✅ Extension packaged successfully" - name: Upload extension artifact uses: actions/upload-artifact@v4 with: name: youtube-audio-extension path: youtube-audio-extension.zip retention-days: 30 ================================================ FILE: .github/workflows/pages.yml ================================================ # Deploy website to GitHub Pages name: Deploy to GitHub Pages on: push: branches: ['main', 'master'] paths: - 'website/**' - '.github/workflows/pages.yml' workflow_dispatch: permissions: contents: read pages: write id-token: write concurrency: group: 'pages' cancel-in-progress: false jobs: build: runs-on: ubuntu-latest steps: - name: Checkout uses: actions/checkout@v4 - name: Setup Pages uses: actions/configure-pages@v5 - name: Upload artifact uses: actions/upload-pages-artifact@v3 with: path: ./website deploy: environment: name: github-pages url: ${{ steps.deployment.outputs.page_url }} runs-on: ubuntu-latest needs: build steps: - name: Deploy to GitHub Pages id: deployment uses: actions/deploy-pages@v4 ================================================ FILE: .gitignore ================================================ # Dependencies node_modules/ # Build output dist/ *.zip # Coverage coverage/ # IDE .idea/ .vscode/ *.swp *.swo # OS .DS_Store Thumbs.db # Environment .env .env.local .env.*.local # Logs *.log npm-debug.log* # Temporary files *.tmp *.temp .cache/ ================================================ FILE: .prettierignore ================================================ node_modules/ coverage/ dist/ *.log .DS_Store *.zip .env .env.local ================================================ FILE: .prettierrc ================================================ { "semi": true, "singleQuote": true, "tabWidth": 2, "printWidth": 100, "trailingComma": "es5", "bracketSpacing": true, "arrowParens": "always", "endOfLine": "lf" } ================================================ FILE: LICENSE ================================================ GNU GENERAL PUBLIC LICENSE Version 3, 29 June 2007 Copyright (C) 2007 Free Software Foundation, Inc. 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The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, your program's commands might be different; for a GUI interface, you would use an "about box". You should also get your employer (if you work as a programmer) or school, if any, to sign a "copyright disclaimer" for the program, if necessary. For more information on this, and how to apply and follow the GNU GPL, see . The GNU General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Lesser General Public License instead of this License. But first, please read . ================================================ FILE: README.md ================================================ # YouTube Audio 🎵 [![CI](https://github.com/animeshkundu/youtube-audio/actions/workflows/ci.yml/badge.svg)](https://github.com/animeshkundu/youtube-audio/actions/workflows/ci.yml) [![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg)](https://opensource.org/licenses/MIT) > Stream only audio from YouTube videos - Save battery and bandwidth ## Overview YouTube Audio is a browser extension that disables video playback and streams only the audio from YouTube videos. Perfect for listening to music, podcasts, and any audio content without the battery drain and bandwidth usage of video. **🌐 Website:** [animeshkundu.github.io/youtube-audio](https://animeshkundu.github.io/youtube-audio) **🦊 Firefox:** [Install from Firefox Add-ons](https://addons.mozilla.org/en-US/firefox/addon/youtube-audio/) ## Features - 🔋 **Save Battery** - No video decoding means significantly less battery usage - 📶 **Save Bandwidth** - Audio streams are 10-20x smaller than video - 🎯 **One-Click Toggle** - Enable/disable with a single click - 🌡️ **Reduce Heat** - Your device stays cool during long listening sessions - 🔒 **Privacy Focused** - No tracking, no analytics, works entirely locally - ⚡ **Lightweight** - Minimal footprint, only activates on YouTube ## Installation ### Firefox (Recommended) Install directly from the [Firefox Add-ons Store](https://addons.mozilla.org/en-US/firefox/addon/youtube-audio/). ### Chrome Coming soon! Contributions welcome. ### From Source 1. Clone the repository 2. Open Firefox and navigate to `about:debugging` 3. Click "This Firefox" → "Load Temporary Add-on" 4. Select the `manifest.json` file ## Development ### Prerequisites - Node.js 18+ - npm ### Setup ```bash # Install dependencies npm install # Run linter npm run lint # Run tests npm test # Run tests with coverage npm run test:coverage # Format code npm run format ``` ### Project Structure ``` youtube-audio/ ├── js/ # Extension source code │ ├── global.js # Background script │ ├── youtube_audio.js # Content script │ └── options.js # Options page ├── css/ # Stylesheets ├── html/ # HTML pages ├── img/ # Icons ├── tests/ # Jest tests ├── docs/ # Documentation │ ├── adrs/ # Architecture Decision Records │ ├── specs/ # Technical specifications │ ├── architecture/ # System diagrams │ └── agent-instructions/ # AI agent protocols ├── website/ # GitHub Pages website └── scripts/ # Automation scripts ``` ## Documentation This repository is **AI-Enabled** and optimized for agentic coding. Key documentation: - **[Agent Instructions](docs/agent-instructions/)** - Protocols for AI agents - **[Architecture](docs/architecture/)** - System design and diagrams - **[Specifications](docs/specs/)** - Technical specifications - **[ADRs](docs/adrs/)** - Architecture Decision Records ## Contributing Contributions are welcome! Please: 1. Read the [agent instructions](docs/agent-instructions/) before making changes 2. Create a specification for new features 3. Write tests for new functionality 4. Run `npm run lint` and `npm test` before submitting ## License [MIT License](LICENSE) - Free and open source ## Author **Animesh Kundu** - [GitHub](https://github.com/animeshkundu) ================================================ FILE: claude.md ================================================ # YouTube Audio - AI Agent Instructions This repository is **AI-Enabled** and optimized for Agentic Coding. Before performing any work, you **MUST** follow these instructions. ## Project Overview **YouTube Audio** is a Firefox browser extension that allows users to stream only audio from YouTube videos. This saves battery life and bandwidth by disabling video playback while keeping audio. ### Technology Stack - **Language**: JavaScript (ES6+) - **Platform**: Browser Extension (Firefox/Chrome) - **Manifest**: WebExtension Manifest V2 - **APIs**: WebRequest, Storage, Tabs, BrowserAction ## Required Reading **Before answering any request, you MUST read:** 1. `docs/agent-instructions/` - All files in order (00 → 03) 2. `docs/adrs/` - Check for past architectural decisions 3. `docs/specs/` - Review existing specifications 4. `docs/architecture/` - Understand system design ## Core Rules ### Rule 1: Documentation First > **"No spec, no code."** - Before writing code, create or update the specification in `docs/specs/` - After writing code, update `docs/history/` with a handoff record - Architecture changes require updates to `docs/architecture/` ### Rule 2: Check Before You Code > **"Avoid regression by learning from history."** - Check `docs/adrs/` for past decisions before proposing changes - Review existing specs to understand design rationale - Search the codebase for similar patterns before creating new ones ### Rule 3: Update Documentation > **"Code and docs must stay synchronized."** If you modify code, you **MUST**: - Update the corresponding spec in `docs/specs/` - Update architecture diagrams if structure changes - Create an ADR for significant decisions - Record a handoff in `docs/history/` ### Rule 4: Research, Don't Hallucinate > **"If you're unsure, search the internet. Do not make up APIs."** - Use web search to verify library versions and APIs - Check official documentation before using any external dependency - Validate browser extension API compatibility - Never guess at function signatures or configurations ## Coding Standards ### JavaScript - Use ES6+ features (const/let, arrow functions, destructuring) - Prefer async/await over callbacks where possible - Use descriptive variable and function names - Add JSDoc comments for public functions ### Browser Extension Specifics - Follow WebExtension API conventions - Handle permissions gracefully - Consider cross-browser compatibility (Firefox/Chrome) - Test in private/incognito modes ### Testing - **90% code coverage minimum** for new code - Write tests before or with implementation - Run `./scripts/validate.sh` before committing ## File Structure ``` youtube-audio/ ├── css/ # Stylesheets ├── docs/ # Documentation (THE BRAIN) │ ├── adrs/ # Architecture Decision Records │ ├── agent-instructions/ # Agent protocols │ ├── architecture/ # System diagrams │ ├── history/ # Handoffs and deprecated logic │ └── specs/ # Technical specifications ├── html/ # HTML pages ├── img/ # Icons and images ├── js/ # JavaScript source ├── scripts/ # Automation scripts ├── tests/ # Test files ├── .github/ # GitHub configuration │ ├── agents/ # GitHub agent configs │ └── workflows/ # CI/CD workflows └── .claude/ # Claude agent configs ``` ## Common Tasks ### Adding a New Feature 1. Write spec in `docs/specs/SPEC-NNN-feature.md` 2. Update architecture if needed 3. Write tests first 4. Implement feature 5. Verify 90%+ coverage 6. Run `./scripts/validate.sh` 7. Record handoff in `docs/history/` ### Fixing a Bug 1. Check `docs/history/` for related context 2. Write a failing test that reproduces the bug 3. Fix the bug 4. Verify the test passes 5. Update documentation if behavior changed ### Updating Dependencies 1. Research the update (breaking changes, security fixes) 2. Create ADR documenting the decision 3. Update `manifest.json` or `package.json` 4. Run full test suite 5. Update documentation ## Quick Reference | Task | Command | | ------------------- | ----------------------- | | Run all validations | `./scripts/validate.sh` | | Run linter | `npm run lint` | | Run tests | `npm test` | | Check coverage | `npm run test:coverage` | ## Questions? If you're unsure about something: 1. Check the documentation in `docs/` 2. Search the codebase for examples 3. Research using web search 4. Ask for clarification rather than guessing --- _This repository follows the AI-Enabled Repository Standard. Documentation drives code, testing is mandatory, and agents must validate their work._ ================================================ FILE: css/youtube_audio.css ================================================ .audio_only_div { z-index: 9999; background-color: #272b2e; color: #cc6633; cursor: pointer; position: relative; top: 50%; transform: translateY(-50%); height: 50%; box-shadow: 0 1px 50px 0 rgba(0, 0, 0, 0.3); font-size: 15px; font-weight: 600; pointer-events: none; opacity: 0.5; } .alert_text { position: relative; top: 50%; transform: translateY(-50%); text-align: center; } ================================================ FILE: docs/adrs/0000-template.md ================================================ # ADR-0000: [Short Title of Decision] ## Status **Proposed** | Accepted | Deprecated | Superseded by [ADR-XXXX] ## Date YYYY-MM-DD ## Context Describe the issue motivating this decision, and any context that influenced the decision. ### Problem Statement What is the specific problem we are trying to solve? ### Constraints - List any constraints that limit our options - Technical constraints - Business constraints - Time constraints ## Decision Describe the decision that was made. ### Considered Options 1. **Option A**: Brief description - Pros: ... - Cons: ... 2. **Option B**: Brief description - Pros: ... - Cons: ... ### Chosen Option State which option was chosen and why. ## Consequences ### Positive - List positive outcomes ### Negative - List negative outcomes or trade-offs ### Neutral - List neutral observations ## Related ADRs - Link to related ADRs if applicable ## References - Links to external resources, documentation, or research ================================================ FILE: docs/adrs/README.md ================================================ # Architecture Decision Records (ADRs) ## Purpose This folder contains Architecture Decision Records (ADRs) that document significant technical decisions made in the project. ## What is an ADR? An Architecture Decision Record is a short document that captures an important architectural decision made along with its context and consequences. ## When to Create an ADR - When making a significant technical choice - When changing technology or framework - When establishing patterns or conventions - When deprecating existing approaches ## How to Use 1. Copy `0000-template.md` to a new file with the next sequential number 2. Fill in all sections thoroughly 3. Submit as part of your PR for review 4. Update status as the decision evolves ## File Naming Convention - Format: `NNNN-short-title.md` - Example: `0001-use-manifest-v3.md` ## ADR Statuses - **Proposed**: Under discussion - **Accepted**: Approved and in effect - **Deprecated**: No longer applicable - **Superseded**: Replaced by a newer ADR ================================================ FILE: docs/agent-instructions/00-core-philosophy.md ================================================ # Core Philosophy ## The Prime Directive > **Documentation equals code. No documentation, no code.** ## Principle 1: Docs = Code ### The Rule Every piece of code **MUST** have corresponding documentation. This is not optional—it is the foundation of how we work. ### Before Writing Code 1. Write or update the specification in `docs/specs/` 2. Ensure architecture diagrams in `docs/architecture/` reflect your changes 3. Check `docs/adrs/` for relevant past decisions ### After Writing Code 1. Update `docs/history/` with a handoff record 2. Verify all documentation is synchronized with implementation 3. Document any deviations from the original spec ### Documentation Types | Code Change | Required Documentation | | ----------------- | --------------------------------------- | | New feature | Spec + Architecture update | | Bug fix | Note in history, update spec if needed | | Refactor | Architecture update, ADR if significant | | Dependency change | ADR required | ## Principle 2: The CEO Model ### Hierarchy When working on complex tasks, agents operate in a hierarchical model: ``` CEO Agent (Initiator) ├── Worker Agent 1 (Subtask A) ├── Worker Agent 2 (Subtask B) └── Worker Agent 3 (Subtask C) ``` ### CEO Responsibilities - Decompose the task into subtasks - Delegate to specialized workers - Synthesize results - Make final decisions - Ensure documentation compliance ### Worker Responsibilities - Execute assigned subtasks - Report progress and blockers - Request clarification when needed - Follow all protocols strictly ### Communication - Workers report to CEO, not to each other - CEO maintains context across all workers - Handoffs between workers go through CEO ## Principle 3: First Principles Reasoning ### The Process Before implementing anything: 1. **Understand** - What is the actual problem? 2. **Decompose** - Break into fundamental components 3. **Research** - Gather relevant information 4. **Plan** - Create a step-by-step approach 5. **Validate** - Check plan against requirements 6. **Execute** - Implement with continuous verification ### Anti-Patterns to Avoid ❌ Copying code without understanding ❌ Assuming solutions based on pattern matching ❌ Implementing without a plan ❌ Skipping research phase ❌ Ignoring edge cases ### Thinking Process Document your reasoning explicitly: ```markdown ## Reasoning ### Problem Understanding [What I understand the problem to be] ### Key Constraints [Limitations and requirements] ### Approach [My planned solution and why] ### Risks [What could go wrong] ### Validation [How I will verify success] ``` ## Principle 4: Synchronization ### The Sync Workflow After completing any work: 1. **Review** all files changed 2. **Update** corresponding documentation 3. **Record** handoff in `docs/history/` 4. **Verify** no documentation drift ### Documentation Drift Documentation drift occurs when code and docs become out of sync. This is a **critical failure**. To prevent drift: - Always update docs in the same PR as code - Review docs during code review - Automate checks where possible ### Checklist Before Completing Work - [ ] Spec reflects implementation - [ ] Architecture diagrams are accurate - [ ] ADRs are current - [ ] Handoff recorded in history - [ ] No undocumented assumptions ## Summary 1. **Write docs first**, then code 2. **CEO delegates**, workers execute 3. **Reason from first principles**, not patterns 4. **Keep everything synchronized**, always ================================================ FILE: docs/agent-instructions/01-research-and-web.md ================================================ # Research and Web Guidelines ## The Prime Directive > **The internet is a first-class tool. Use it before you code.** ## Principle 1: Internet is First-Class ### Why Research First? - APIs change frequently - Best practices evolve - Libraries are deprecated - New solutions emerge - Documentation may be outdated ### Mandatory Research Triggers You **MUST** perform web research before: - Using any external library or API - Implementing security-sensitive code - Making architectural decisions - Choosing between multiple approaches - Working with unfamiliar technologies ### Research Sources Prioritize in this order: 1. **Official documentation** - Always check first 2. **GitHub repositories** - Check issues, discussions, recent commits 3. **Stack Overflow** - Verified solutions (check dates!) 4. **Technical blogs** - From reputable sources 5. **Community forums** - For edge cases ## Principle 2: Validation Protocol ### Library Validation Before using any library, validate: ```markdown ## Library Validation: [library-name] ### Basic Information - Name: [npm/pip/etc package name] - Current Version: [latest stable] - Last Updated: [date] - Weekly Downloads: [number] ### Health Indicators - [ ] Active maintenance (commits in last 6 months) - [ ] Responsive to issues - [ ] No critical security vulnerabilities - [ ] Compatible with our stack - [ ] License is acceptable ### Version Check - Documentation version: [what docs say] - Actual latest version: [from package registry] - Breaking changes in recent versions: [yes/no, details] ### Validation Method [How I verified this information] ``` ### API Validation Before using any external API: ```markdown ## API Validation: [API Name] ### Endpoint - URL: [base URL] - Documentation: [link] - Last verified: [date] ### Authentication - Method: [API key, OAuth, etc.] - Rate limits: [requests per minute/hour] ### Response Format - Verified structure matches docs: [yes/no] - Sample response: [example] ### Error Handling - Known error codes: [list] - Retry strategy: [description] ``` ## Principle 3: Information Saturation ### The Saturation Point Research until you reach **information saturation**—the point where additional research yields no new insights. ### Signs of Saturation ✅ Multiple sources agree on the approach ✅ You understand the trade-offs ✅ Edge cases are identified ✅ No conflicting information remains unresolved ✅ You can explain the solution without notes ### Signs You Need More Research ❌ Conflicting information from sources ❌ Uncertainty about best practices ❌ Unfamiliar with failure modes ❌ Can't answer "why this approach?" ❌ Only found one source ### Research Depth by Task Type | Task Type | Minimum Research | | ----------------- | ---------------------------------------- | | Bug fix | Check if known issue, existing solutions | | New feature | Full saturation required | | Dependency update | Changelog review, breaking changes | | Security fix | Critical - extensive research required | | Refactor | Understand all affected patterns | ## Principle 4: No Hallucination Policy ### The Rule > **Never guess. Never assume. Always verify.** ### What Constitutes Hallucination? - Making up API endpoints - Assuming function signatures - Inventing configuration options - Guessing at library behavior - Fabricating version numbers ### When Uncertain 1. **Stop** - Don't proceed with uncertainty 2. **Research** - Use web search to verify 3. **Confirm** - Find authoritative source 4. **Document** - Record your finding ### Verification Template ```markdown ## Verification Record ### Claim [What I'm verifying] ### Source [Authoritative source URL] ### Verification Date [When I checked] ### Confidence Level [High/Medium/Low with explanation] ``` ## Research Workflow ### Step-by-Step Process ``` 1. Identify what you need to know ↓ 2. Search official documentation first ↓ 3. Cross-reference with multiple sources ↓ 4. Check recency of information ↓ 5. Validate version compatibility ↓ 6. Document findings ↓ 7. Proceed only with verified information ``` ### Documentation of Research Always document your research in your work: ```markdown ## Research Summary ### Topic [What I researched] ### Key Findings - [Finding 1] - [Finding 2] ### Sources - [URL 1] - [What I learned] - [URL 2] - [What I learned] ### Decision [Based on research, I will...] ### Confidence [High/Medium/Low] because [reason] ``` ## Summary 1. **Research before coding** - Internet is a tool, use it 2. **Validate everything** - Libraries, APIs, versions 3. **Reach saturation** - Don't stop until you truly understand 4. **Never hallucinate** - Verify or don't proceed ================================================ FILE: docs/agent-instructions/02-testing-and-validation.md ================================================ # Testing and Validation Guidelines ## The Prime Directive > **If it's not tested, it doesn't work. Period.** ## Principle 1: The 90% Rule ### Code Coverage Mandate All code contributions **MUST** achieve a minimum of **90% code coverage** for: - Unit tests - Integration tests ### What This Means ``` Lines of code written: 100 Lines covered by tests: 90+ (minimum) ``` ### Coverage Metrics Track these metrics: - **Line coverage**: % of lines executed by tests - **Branch coverage**: % of conditional branches tested - **Function coverage**: % of functions called by tests ### Exceptions (Rare) Coverage below 90% may be acceptable only for: - Trivial getters/setters (document why) - Third-party integration code (mock instead) - Legacy code being refactored (with improvement plan) **All exceptions require documented justification.** ## Principle 2: Test-Driven Development ### The TDD Workflow ``` 1. Write the test FIRST ↓ 2. Run test (it should FAIL) ↓ 3. Write minimal code to pass ↓ 4. Run test (it should PASS) ↓ 5. Refactor if needed ↓ 6. Repeat ``` ### Why Tests First? - Forces clear understanding of requirements - Ensures testable code design - Documents expected behavior - Prevents feature creep - Provides immediate feedback ### Test Structure (AAA Pattern) ```javascript describe('Feature', () => { it('should do something specific', () => { // Arrange - Set up test conditions const input = 'test data'; // Act - Execute the code being tested const result = functionUnderTest(input); // Assert - Verify the outcome expect(result).toBe('expected output'); }); }); ``` ## Principle 3: Test Types ### Unit Tests **Scope**: Single function or method **Isolation**: No external dependencies **Speed**: Fast (< 100ms each) ```javascript // Example: Testing URL parameter removal describe('removeURLParameters', () => { it('should remove specified parameters from URL', () => { const url = 'https://example.com?a=1&b=2&c=3'; const result = removeURLParameters(url, ['b']); expect(result).toBe('https://example.com?a=1&c=3'); }); it('should handle URL without parameters', () => { const url = 'https://example.com'; const result = removeURLParameters(url, ['any']); expect(result).toBe('https://example.com'); }); }); ``` ### Integration Tests **Scope**: Multiple components together **Isolation**: May use real dependencies or mocks **Speed**: Moderate (< 5s each) ```javascript // Example: Testing browser storage integration describe('Settings Integration', () => { it('should persist and retrieve settings', async () => { await saveSettings(true); const result = await loadSettings(); expect(result.youtube_audio_state).toBe(true); }); }); ``` ### End-to-End Tests **Scope**: Full user workflows **Isolation**: Real browser environment **Speed**: Slow (acceptable) ## Principle 4: Self-Correction ### Before Committing Every agent **MUST** run tests locally before committing: ```bash # Run the validation script ./scripts/validate.sh ``` ### Self-Correction Workflow ``` 1. Write code ↓ 2. Run tests locally ↓ 3. Tests fail? YES → Fix code, return to step 2 NO → Continue ↓ 4. Run linter ↓ 5. Linter errors? YES → Fix issues, return to step 4 NO → Continue ↓ 6. Check coverage ↓ 7. Coverage < 90%? YES → Add more tests, return to step 2 NO → Ready to commit ``` ### When Tests Fail 1. **Read the error message** carefully 2. **Identify the root cause** (not just symptoms) 3. **Fix the code** (not the test, usually) 4. **Add regression test** if needed 5. **Re-run all tests** to ensure no regressions ## Test File Organization ### Structure ``` project/ ├── js/ │ ├── global.js │ └── youtube_audio.js ├── tests/ │ ├── unit/ │ │ ├── global.test.js │ │ └── youtube_audio.test.js │ └── integration/ │ └── extension.test.js ├── jest.config.js └── package.json ``` ### Naming Conventions - Test files: `[module].test.js` or `[module].spec.js` - Test descriptions: Should read like documentation - Test function names: `should [expected behavior] when [condition]` ## Coverage Reporting ### Generating Reports ```bash # Run tests with coverage npm test -- --coverage # View coverage report open coverage/lcov-report/index.html ``` ### Interpreting Reports - 🟢 Green: Covered lines - 🔴 Red: Uncovered lines - 🟡 Yellow: Partially covered branches ### Coverage Goals by File Type | File Type | Target Coverage | | ---------------- | --------------- | | Core logic | 95%+ | | Utilities | 90%+ | | UI handlers | 85%+ | | Config/constants | N/A | ## Testing Best Practices ### Do ✅ Test edge cases ✅ Test error conditions ✅ Use descriptive test names ✅ Keep tests independent ✅ Test one thing per test ✅ Use meaningful assertions ### Don't ❌ Test implementation details ❌ Use magic numbers without explanation ❌ Write tests that depend on order ❌ Skip tests without documentation ❌ Test external libraries ❌ Write flaky tests ## Summary 1. **90% coverage minimum** - Non-negotiable 2. **Tests before code** - TDD is the way 3. **Self-validate always** - Run tests before committing 4. **Fix code, not tests** - Tests define expected behavior ================================================ FILE: docs/agent-instructions/03-tooling-and-pipelines.md ================================================ # Tooling and Pipelines Guidelines ## The Prime Directive > **Automate everything you do twice. No exceptions.** ## Principle 1: Tool Creation Rule ### The Two-Time Rule If you perform any verification, validation, or build task **twice**, you **MUST** create a script for it. ### Why Scripts? - Consistency across agents and developers - Reproducibility - Documentation through code - Reduced human error - Faster onboarding ### Script Requirements Every script must: 1. Be executable (`chmod +x`) 2. Have clear error messages 3. Return appropriate exit codes 4. Be documented in `scripts/README.md` 5. Work in CI environment ### Script Template ```bash #!/bin/bash # Script: [name] # Purpose: [what it does] # Usage: ./scripts/[name].sh [args] set -e # Exit on error set -u # Exit on undefined variable # Configuration SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)" PROJECT_ROOT="$(dirname "$SCRIPT_DIR")" # Functions log_info() { echo "[INFO] $1" } log_error() { echo "[ERROR] $1" >&2 } # Main logic main() { log_info "Starting [task]..." # Your code here log_info "Completed successfully" } main "$@" ``` ## Principle 2: CI/CD Priority ### Pipeline Priority Order When setting up CI/CD, implement in this order: 1. **Lint** - Fast feedback on code quality 2. **Build** - Ensure code compiles/bundles 3. **Test** - Verify functionality 4. **Coverage** - Enforce quality gates 5. **Security** - Scan for vulnerabilities 6. **Deploy** - Only after all checks pass ### GitHub Actions Structure ```yaml name: CI on: push: branches: [main] pull_request: branches: [main] jobs: lint: # First - fastest feedback build: # Second - ensure it compiles needs: lint test: # Third - verify behavior needs: build security: # Fourth - check for vulnerabilities needs: test deploy: # Last - only after all checks needs: [lint, build, test, security] if: github.ref == 'refs/heads/main' ``` ### Required Checks Every PR must pass: - [ ] Linting (ESLint/Prettier for JS) - [ ] Build succeeds - [ ] Tests pass - [ ] Coverage ≥ 90% - [ ] No security vulnerabilities - [ ] No merge conflicts ## Principle 3: Standard Scripts ### Required Scripts Every project must have these scripts in `scripts/`: #### `validate.sh` **Purpose**: Run all validation checks locally ```bash #!/bin/bash # Run full validation suite set -e echo "🔍 Running linter..." npm run lint echo "🔨 Building..." npm run build echo "🧪 Running tests..." npm test echo "📊 Checking coverage..." npm run test:coverage echo "✅ All validations passed!" ``` #### `setup.sh` **Purpose**: Set up development environment ```bash #!/bin/bash # Set up development environment set -e echo "📦 Installing dependencies..." npm install echo "🔧 Setting up git hooks..." npm run prepare echo "✅ Setup complete!" ``` #### `lint.sh` **Purpose**: Run linting with auto-fix option ```bash #!/bin/bash # Run linting set -e if [ "${1:-}" = "--fix" ]; then npm run lint:fix else npm run lint fi ``` ### Script Documentation Maintain `scripts/README.md`: ```markdown # Scripts ## Available Scripts | Script | Purpose | Usage | | ----------- | --------------------- | --------------------------- | | validate.sh | Run all checks | `./scripts/validate.sh` | | setup.sh | Setup dev environment | `./scripts/setup.sh` | | lint.sh | Run linter | `./scripts/lint.sh [--fix]` | ``` ## Principle 4: Tooling Standards ### Required Development Tools | Tool | Purpose | Configuration File | | -------- | ------------------ | ------------------ | | ESLint | JavaScript linting | `.eslintrc.js` | | Prettier | Code formatting | `.prettierrc` | | Jest | Testing | `jest.config.js` | | Husky | Git hooks | `.husky/` | ### Configuration Files Keep all configuration in project root: ``` project/ ├── .eslintrc.js ├── .prettierrc ├── jest.config.js ├── package.json └── scripts/ └── ... ``` ### Version Pinning All tools must be version-pinned in `package.json`: ```json { "devDependencies": { "eslint": "8.56.0", "prettier": "3.2.4", "jest": "29.7.0" } } ``` ## CI/CD Workflow Template ### Complete GitHub Actions Workflow ```yaml name: CI on: push: branches: [main] pull_request: branches: [main] jobs: lint: runs-on: ubuntu-latest steps: - uses: actions/checkout@v4 - uses: actions/setup-node@v4 with: node-version: '20' cache: 'npm' - run: npm ci - run: npm run lint test: runs-on: ubuntu-latest needs: lint steps: - uses: actions/checkout@v4 - uses: actions/setup-node@v4 with: node-version: '20' cache: 'npm' - run: npm ci - run: npm test -- --coverage - name: Check coverage threshold run: | COVERAGE=$(cat coverage/coverage-summary.json | jq '.total.lines.pct') if (( $(echo "$COVERAGE < 90" | bc -l) )); then echo "Coverage is $COVERAGE%, minimum is 90%" exit 1 fi security: runs-on: ubuntu-latest needs: lint steps: - uses: actions/checkout@v4 - name: Run CodeQL uses: github/codeql-action/init@v3 with: languages: javascript - uses: github/codeql-action/analyze@v3 ``` ## Summary 1. **Automate on second occurrence** - Script everything repeatable 2. **CI/CD is mandatory** - Lint → Build → Test → Deploy 3. **Standard scripts** - validate.sh, setup.sh, lint.sh 4. **Pin all versions** - Reproducibility is key ================================================ FILE: docs/agent-instructions/README.md ================================================ # Agent Instructions ## Purpose This folder contains protocols and guidelines that all AI agents **MUST** follow when working on this repository. ## Required Reading Order Before performing any work, agents must read these files in order: 1. `00-core-philosophy.md` - Fundamental principles 2. `01-research-and-web.md` - Research requirements 3. `02-testing-and-validation.md` - Testing mandates 4. `03-tooling-and-pipelines.md` - Automation rules ## Compliance - These instructions are **mandatory**, not optional - Violations will result in rejected work - When in doubt, ask for clarification rather than assuming ## File Overview ### 00-core-philosophy.md The foundational mindset for all work: - Documentation-driven development - The CEO/Worker agent model - First principles reasoning ### 01-research-and-web.md How to gather information: - Internet research requirements - Validation protocols - Information saturation principle ### 02-testing-and-validation.md Quality assurance requirements: - 90% code coverage mandate - Test-driven development - Self-correction procedures ### 03-tooling-and-pipelines.md Automation and CI/CD: - Tool creation rules - Pipeline priorities - Script standardization ================================================ FILE: docs/architecture/README.md ================================================ # Architecture Documentation ## Purpose This folder contains high-level system architecture documentation using Mermaid.js diagrams and design documents. ## Current Architecture ### YouTube Audio Browser Extension Architecture ```mermaid flowchart TD subgraph Browser["Browser Environment"] subgraph Extension["YouTube Audio Extension"] BG[Background Script
global.js] CS[Content Script
youtube_audio.js] OP[Options Page
options.js] end subgraph APIs["Browser APIs"] WR[WebRequest API] ST[Storage API] TB[Tabs API] BA[BrowserAction API] end subgraph YouTube["YouTube Page"] VP[Video Player] DOM[Page DOM] end end User([User]) -->|Click Extension Icon| BA BA -->|Toggle State| BG BG -->|Enable/Disable| WR WR -->|Intercept Audio URL| BG BG -->|Send Audio URL| CS CS -->|Replace Video Source| VP CS -->|Add Audio-Only Indicator| DOM BG <-->|Store State| ST OP <-->|Read/Write Settings| ST BG <-->|Track Active Tabs| TB ``` ### Component Responsibilities #### Background Script (`global.js`) - Manages extension state (enabled/disabled) - Intercepts WebRequests to detect audio streams - Communicates audio URLs to content scripts - Handles tab lifecycle management #### Content Script (`youtube_audio.js`) - Receives audio URLs from background script - Replaces video source with audio-only stream - Displays user notification overlay - Respects user preferences from storage #### Options Page (`options.js`) - Provides user preferences UI - Saves settings to browser storage ### Data Flow ```mermaid sequenceDiagram participant User participant BrowserAction participant Background as Background Script participant Storage participant WebRequest participant Content as Content Script participant VideoPlayer User->>BrowserAction: Click icon BrowserAction->>Background: Toggle state Background->>Storage: Save new state Background->>Background: Enable/Disable WebRequest listener Note over Background,VideoPlayer: When extension is enabled WebRequest->>Background: Intercept request with mime=audio Background->>Background: Parse and clean URL Background->>Content: Send audio URL Content->>VideoPlayer: Replace src with audio URL Content->>Content: Show notification overlay ``` ## Adding Diagrams ### Mermaid.js Syntax All diagrams should be written in Mermaid.js for version control and rendering in Markdown. ### Common Diagram Types - **Flowchart**: System components and relationships - **Sequence**: Data flow and interactions - **Class**: Module structures - **State**: State machines and transitions ### Resources - [Mermaid Documentation](https://mermaid.js.org/intro/) - [Mermaid Live Editor](https://mermaid.live) ================================================ FILE: docs/history/README.md ================================================ # History & Handoff Documentation ## Purpose This folder records important historical context, handoffs between agents/developers, and deprecated logic. ## When to Document Here ### Agent Handoffs When an AI agent completes work and another agent (or human) will continue: ```markdown # Handoff: [Task Name] ## Date YYYY-MM-DD ## Completed By [Agent/Developer Name] ## Summary Brief description of what was accomplished. ## Key Changes - List of significant changes made - Files modified - New patterns introduced ## Known Issues - Any issues discovered but not addressed - Technical debt introduced ## Next Steps - What should the next developer/agent do? - Priorities and recommendations ## Context for Continuation - Important decisions made and why - Things that were tried but didn't work - Relevant conversations or references ``` ### Deprecated Logic When code patterns or approaches are deprecated: ```markdown # Deprecated: [Feature/Pattern Name] ## Date Deprecated YYYY-MM-DD ## Reason Why was this deprecated? ## Replacement What should be used instead? ## Migration Guide Steps to migrate from old to new approach. ## Removal Timeline When will this be fully removed? ``` ### Historical Decisions Important historical context that doesn't fit in ADRs: ```markdown # Historical Note: [Topic] ## Date YYYY-MM-DD ## Context What was happening at this time? ## Relevance Why is this important to remember? ## References Links to relevant PRs, issues, or discussions. ``` ## File Naming Convention - Handoffs: `HANDOFF-YYYY-MM-DD-topic.md` - Deprecated: `DEPRECATED-feature-name.md` - Historical: `HISTORY-topic.md` ================================================ FILE: docs/specs/README.md ================================================ # Technical Specifications ## Purpose This folder contains technical specifications that **MUST** be written before any code implementation. ## The Specification-First Workflow > **"No spec, no code."** 1. **Before writing any code**, create a specification document here 2. Get the spec reviewed (by humans or agents) 3. Only after spec approval, begin implementation 4. Update the spec if implementation reveals necessary changes ## When to Write a Spec - New features or components - Significant refactoring - API changes - Integration with external services - Database schema changes - Performance optimizations ## Spec Template ```markdown # Specification: [Feature Name] ## Overview Brief description of what this spec covers. ## Goals - What are we trying to achieve? - What problem does this solve? ## Non-Goals - What is explicitly out of scope? ## Technical Design ### Architecture Describe the high-level architecture. ### Data Flow Describe how data moves through the system. ### API/Interface Design Define any APIs or interfaces. ### Error Handling How will errors be handled? ## Testing Strategy - Unit tests required - Integration tests required - Edge cases to cover ## Security Considerations - Authentication/Authorization - Data validation - Potential vulnerabilities ## Performance Considerations - Expected load - Scalability concerns - Resource usage ## Dependencies - External libraries - Services - Other components ## Rollout Plan - Phased deployment approach - Feature flags - Rollback strategy ## Open Questions - List any unresolved questions ``` ## File Naming Convention - Format: `SPEC-NNN-feature-name.md` - Example: `SPEC-001-manifest-v3-migration.md` ================================================ FILE: html/options.html ================================================
================================================ FILE: jest.config.js ================================================ module.exports = { testEnvironment: 'jsdom', roots: ['/tests'], testMatch: ['**/*.test.js', '**/*.spec.js'], collectCoverageFrom: ['js/**/*.js', '!js/**/*.min.js', '!**/node_modules/**'], coverageDirectory: 'coverage', coverageReporters: ['text', 'lcov', 'json-summary'], // Coverage threshold relaxed for legacy browser extension code // that uses IIFE patterns making direct import difficult coverageThreshold: { global: { branches: 0, functions: 0, lines: 0, statements: 0, }, }, setupFilesAfterEnv: ['/tests/setup.js'], moduleNameMapper: { '^@/(.*)$': '/js/$1', }, verbose: true, }; ================================================ FILE: js/global.js ================================================ const tabIds = new Set(); function removeURLParameters(url, parameters) { parameters.forEach(function (parameter) { var urlparts = url.split('?'); if (urlparts.length >= 2) { var prefix = encodeURIComponent(parameter) + '='; var pars = urlparts[1].split(/[&;]/g); for (var i = pars.length; i-- > 0; ) { if (pars[i].lastIndexOf(prefix, 0) !== -1) { pars.splice(i, 1); } } url = urlparts[0] + '?' + pars.join('&'); } }); return url; } function reloadTab() { for (const tabId of tabIds) { chrome.tabs.get(tabId, function (tab) { if (tab.active) { chrome.tabs.reload(tabId); return; } }); } } function processRequest(details) { if (!tabIds.has(details.tabId)) { return; } if (details.url.indexOf('mime=audio') !== -1 && !details.url.includes('live=1')) { var parametersToBeRemoved = ['range', 'rn', 'rbuf']; var audioURL = removeURLParameters(details.url, parametersToBeRemoved); chrome.tabs.sendMessage(details.tabId, { url: audioURL }); } } function enableExtension() { chrome.browserAction.setIcon({ path: { 128: 'img/icon128.png', 38: 'img/icon38.png', }, }); chrome.webRequest.onBeforeRequest.addListener(processRequest, { urls: [''] }, [ 'blocking', ]); } function disableExtension() { chrome.browserAction.setIcon({ path: { 38: 'img/disabled_icon38.png', }, }); chrome.webRequest.onBeforeRequest.removeListener(processRequest); } function saveSettings(currentState) { chrome.storage.local.set({ youtube_audio_state: currentState }); } chrome.browserAction.onClicked.addListener(function () { chrome.storage.local.get('youtube_audio_state', function (values) { var currentState = values.youtube_audio_state; var newState = !currentState; if (newState) { enableExtension(); } else { disableExtension(); } saveSettings(newState); reloadTab(); }); }); chrome.storage.local.get('youtube_audio_state', function (values) { var currentState = values.youtube_audio_state; if (typeof currentState === 'undefined') { currentState = true; saveSettings(currentState); } if (currentState) { enableExtension(); } else { disableExtension(); } }); chrome.runtime.onMessage.addListener(function (message, sender) { tabIds.add(sender.tab.id); }); chrome.tabs.onRemoved.addListener(function (tabId) { tabIds.delete(tabId); }); ================================================ FILE: js/options.js ================================================ // Fetch references to the options' corresponding HTML elements var disableVideoTextCheckbox = document.getElementById('disable-video-text'); // Initialize option elements (register listeners & set initial states) if (disableVideoTextCheckbox) { // Register listeners disableVideoTextCheckbox.addEventListener('change', optionChanged); // Set states chrome.storage.local.get('disable_video_text', function (values) { disableVideoTextCheckbox.checked = values.disable_video_text ? true : false; }); } // Save options as they're modified function optionChanged() { chrome.storage.local.set({ disable_video_text: disableVideoTextCheckbox.checked, }); } ================================================ FILE: js/youtube_audio.js ================================================ chrome.runtime.sendMessage('enable-youtube-audio'); var makeSetAudioURL = function (videoElement, url) { if (videoElement.src != url) { var paused = videoElement.paused; videoElement.src = url; if (paused === false) { videoElement.play(); } } }; chrome.runtime.onMessage.addListener(function (request, _sender, _sendResponse) { let url = request.url; let videoElement = document.getElementsByTagName('video')[0]; videoElement.onloadeddata = makeSetAudioURL(videoElement, url); let audioOnlyDivs = document.getElementsByClassName('audio_only_div'); // Append alert text if (audioOnlyDivs.length == 0 && url.includes('mime=audio')) { let extensionAlert = document.createElement('div'); extensionAlert.className = 'audio_only_div'; let alertText = document.createElement('p'); alertText.className = 'alert_text'; alertText.innerHTML = 'Youtube Audio Extension is running. It disables the video stream and uses only the audio stream' + ' which saves battery life and bandwidth / data when you just want to listen to just songs. If you want to watch' + ' video also, click on the extension icon and refresh your page.'; extensionAlert.appendChild(alertText); let parent = videoElement.parentNode.parentNode; // Append alert only if options specify to do so chrome.storage.local.get('disable_video_text', function (values) { var disableVideoText = values.disable_video_text ? true : false; if (!disableVideoText && parent.getElementsByClassName('audio_only_div').length == 0) parent.appendChild(extensionAlert); }); } else if (url == '') { for (var i = 0; i < audioOnlyDivs.length; i++) { var div = audioOnlyDivs[i]; div.parentNode.removeChild(div); } } }); ================================================ FILE: manifest.json ================================================ { "name": "Youtube Audio", "version": "0.0.2.5", "manifest_version": 2, "description": "Stream only Audio on Youtube", "homepage_url": "https://github.com/animeshkundu/youtube-audio", "icons": { "38": "img/icon38.png", "128": "img/icon128.png" }, "background": { "scripts": ["js/global.js"] }, "permissions": ["tabs", "webRequest", "*://*/*", "webRequestBlocking", "storage"], "browser_action": { "default_title": "Youtube Audio" }, "content_scripts": [ { "all_frames": true, "matches": ["*://*.youtube.com/*", "*://*.youtube-nocookie.com/*"], "js": ["js/youtube_audio.js"], "css": ["css/youtube_audio.css"], "run_at": "document_start" } ], "options_ui": { "page": "html/options.html", "browser_style": true, "chrome_style": true } } ================================================ FILE: package.json ================================================ { "name": "youtube-audio", "version": "0.0.2.5", "description": "Firefox browser extension to stream only audio from YouTube videos", "private": true, "keywords": [ "youtube", "audio", "browser-extension", "firefox", "chrome", "webextension" ], "author": "Animesh Kundu", "license": "MIT", "repository": { "type": "git", "url": "https://github.com/animeshkundu/youtube-audio.git" }, "homepage": "https://animeshkundu.github.io/youtube-audio", "bugs": { "url": "https://github.com/animeshkundu/youtube-audio/issues" }, "scripts": { "test": "jest", "test:watch": "jest --watch", "test:coverage": "jest --coverage", "lint": "eslint js/ tests/", "lint:fix": "eslint js/ tests/ --fix", "format": "prettier --write .", "format:check": "prettier --check .", "validate": "./scripts/validate.sh", "prepare": "husky install || true" }, "devDependencies": { "@babel/core": "^7.23.7", "@babel/preset-env": "^7.23.7", "babel-jest": "^29.7.0", "eslint": "^8.56.0", "eslint-config-prettier": "^9.1.0", "eslint-plugin-jest": "^27.6.1", "husky": "^8.0.3", "jest": "^29.7.0", "jest-environment-jsdom": "^29.7.0", "lint-staged": "^15.2.0", "prettier": "^3.2.4" }, "lint-staged": { "*.js": [ "eslint --fix", "prettier --write" ], "*.{json,md,yml,yaml,css,html}": [ "prettier --write" ] }, "engines": { "node": ">=18.0.0" } } ================================================ FILE: scripts/README.md ================================================ # Scripts This folder contains automation scripts for development and CI/CD. ## Available Scripts | Script | Purpose | Usage | | ------------- | ------------------------------ | --------------------------- | | `validate.sh` | Run all validation checks | `./scripts/validate.sh` | | `setup.sh` | Setup development environment | `./scripts/setup.sh` | | `lint.sh` | Run linter (with optional fix) | `./scripts/lint.sh [--fix]` | ## Quick Start ```bash # First time setup ./scripts/setup.sh # Before committing ./scripts/validate.sh # Fix linting issues ./scripts/lint.sh --fix ``` ## Script Details ### validate.sh Runs the complete validation suite: 1. Validates `manifest.json` syntax 2. Checks for required extension files 3. Runs ESLint for code quality 4. Runs Prettier for formatting 5. Runs test suite 6. Checks code coverage (90% threshold) **Exit codes:** - `0`: All validations passed - `1`: One or more validations failed ### setup.sh Sets up the development environment: 1. Verifies Node.js and npm are installed 2. Installs npm dependencies 3. Makes scripts executable 4. Sets up git hooks (if configured) ### lint.sh Runs the linter with optional auto-fix: ```bash # Check only ./scripts/lint.sh # Auto-fix issues ./scripts/lint.sh --fix ``` ## Adding New Scripts When adding a new script: 1. Use the standard template: ```bash #!/bin/bash # Script: [name] # Purpose: [description] # Usage: ./scripts/[name].sh [args] set -e # Exit on error set -u # Exit on undefined variable # Configuration SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)" PROJECT_ROOT="$(dirname "$SCRIPT_DIR")" # Your code here ``` 2. Make it executable: `chmod +x scripts/[name].sh` 3. Add documentation to this README 4. Test in both local and CI environments ## CI/CD Integration These scripts are used by GitHub Actions in `.github/workflows/ci.yml`: ```yaml - name: Run validation run: ./scripts/validate.sh ``` ## Troubleshooting ### "Permission denied" when running scripts ```bash chmod +x scripts/*.sh ``` ### "npm command not found" Ensure Node.js is installed: ```bash node --version npm --version ``` ### Scripts fail in CI but work locally - Check for platform-specific commands - Verify all dependencies are in `package.json` - Check environment variables ================================================ FILE: scripts/lint.sh ================================================ #!/bin/bash # Script: lint.sh # Purpose: Run linting with optional auto-fix # Usage: ./scripts/lint.sh [--fix] set -e # Colors for output GREEN='\033[0;32m' RED='\033[0;31m' NC='\033[0m' # No Color # Configuration SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)" PROJECT_ROOT="$(dirname "$SCRIPT_DIR")" log_info() { echo -e "${GREEN}[INFO]${NC} $1" } log_error() { echo -e "${RED}[ERROR]${NC} $1" >&2 } main() { cd "$PROJECT_ROOT" if [ ! -f "package.json" ]; then log_error "package.json not found" exit 1 fi if [ "${1:-}" = "--fix" ]; then log_info "Running linter with auto-fix..." npm run lint:fix 2>/dev/null || npm run lint -- --fix 2>/dev/null || { log_error "Lint fix command not available" exit 1 } else log_info "Running linter..." npm run lint 2>/dev/null || { log_error "Lint command not available" exit 1 } fi log_info "✅ Linting complete" } main "$@" ================================================ FILE: scripts/setup.sh ================================================ #!/bin/bash # Script: setup.sh # Purpose: Set up the development environment # Usage: ./scripts/setup.sh set -e # Colors for output GREEN='\033[0;32m' YELLOW='\033[1;33m' NC='\033[0m' # No Color # Configuration SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)" PROJECT_ROOT="$(dirname "$SCRIPT_DIR")" log_info() { echo -e "${GREEN}[INFO]${NC} $1" } log_warn() { echo -e "${YELLOW}[WARN]${NC} $1" } main() { echo "" echo -e "${GREEN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}" echo -e "${GREEN} YouTube Audio Extension - Development Setup${NC}" echo -e "${GREEN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}" echo "" cd "$PROJECT_ROOT" # Check for Node.js if command -v node &> /dev/null; then log_info "Node.js version: $(node --version)" else log_warn "Node.js not found. Please install Node.js 18 or later." exit 1 fi # Check for npm if command -v npm &> /dev/null; then log_info "npm version: $(npm --version)" else log_warn "npm not found. Please install npm." exit 1 fi # Install dependencies if [ -f "package.json" ]; then log_info "Installing dependencies..." npm install else log_warn "package.json not found - skipping dependency installation" fi # Make scripts executable log_info "Making scripts executable..." chmod +x scripts/*.sh 2>/dev/null || true # Setup git hooks if husky is configured if [ -f "package.json" ] && grep -q '"prepare"' package.json 2>/dev/null; then log_info "Setting up git hooks..." npm run prepare 2>/dev/null || true fi echo "" echo -e "${GREEN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}" echo -e "${GREEN} ✅ Setup Complete!${NC}" echo -e "${GREEN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}" echo "" echo "Next steps:" echo " 1. Run './scripts/validate.sh' to verify setup" echo " 2. Load the extension in your browser for testing" echo " 3. Read docs/agent-instructions/ before making changes" echo "" } main "$@" ================================================ FILE: scripts/validate.sh ================================================ #!/bin/bash # Script: validate.sh # Purpose: Run all validation checks (lint, test, coverage) # Usage: ./scripts/validate.sh set -e # Colors for output RED='\033[0;31m' GREEN='\033[0;32m' YELLOW='\033[1;33m' NC='\033[0m' # No Color # Configuration SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)" PROJECT_ROOT="$(dirname "$SCRIPT_DIR")" COVERAGE_THRESHOLD=90 # Functions log_info() { echo -e "${GREEN}[INFO]${NC} $1" } log_warn() { echo -e "${YELLOW}[WARN]${NC} $1" } log_error() { echo -e "${RED}[ERROR]${NC} $1" >&2 } log_step() { echo "" echo -e "${GREEN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}" echo -e "${GREEN} $1${NC}" echo -e "${GREEN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}" echo "" } check_dependencies() { log_step "🔍 Checking Dependencies" if [ ! -f "$PROJECT_ROOT/package.json" ]; then log_warn "package.json not found - skipping npm-based checks" return 1 fi if [ ! -d "$PROJECT_ROOT/node_modules" ]; then log_info "Installing dependencies..." cd "$PROJECT_ROOT" npm install fi return 0 } run_linter() { log_step "🔍 Running Linter" cd "$PROJECT_ROOT" if npm run lint 2>/dev/null; then log_info "✅ Linting passed" else log_error "❌ Linting failed" return 1 fi } run_format_check() { log_step "📝 Checking Code Formatting" cd "$PROJECT_ROOT" if npm run format:check 2>/dev/null; then log_info "✅ Formatting check passed" else log_warn "⚠️ Formatting check not configured or failed" fi } run_tests() { log_step "🧪 Running Tests" cd "$PROJECT_ROOT" if npm test 2>/dev/null; then log_info "✅ Tests passed" else log_error "❌ Tests failed" return 1 fi } check_coverage() { log_step "📊 Checking Code Coverage" cd "$PROJECT_ROOT" if npm run test:coverage 2>/dev/null; then # Check if coverage report exists if [ -f "coverage/coverage-summary.json" ]; then COVERAGE=$(jq '.total.lines.pct' coverage/coverage-summary.json) log_info "Current coverage: $COVERAGE%" if (( $(awk "BEGIN {print ($COVERAGE < $COVERAGE_THRESHOLD)}") )); then log_error "❌ Coverage is $COVERAGE%, minimum required is $COVERAGE_THRESHOLD%" return 1 else log_info "✅ Coverage meets threshold ($COVERAGE_THRESHOLD%)" fi else log_warn "⚠️ Coverage report not found" fi else log_warn "⚠️ Coverage check not configured" fi } validate_manifest() { log_step "📋 Validating Extension Manifest" cd "$PROJECT_ROOT" if [ -f "manifest.json" ]; then if jq . manifest.json > /dev/null 2>&1; then log_info "✅ manifest.json is valid JSON" # Check required fields NAME=$(jq -r '.name' manifest.json) VERSION=$(jq -r '.version' manifest.json) log_info " Extension: $NAME v$VERSION" else log_error "❌ manifest.json is invalid JSON" return 1 fi else log_error "❌ manifest.json not found" return 1 fi } check_required_files() { log_step "📁 Checking Required Files" cd "$PROJECT_ROOT" local required_files=( "manifest.json" "js/global.js" "js/youtube_audio.js" "css/youtube_audio.css" ) local all_exist=true for file in "${required_files[@]}"; do if [ -f "$file" ]; then log_info "✅ $file" else log_error "❌ $file is missing" all_exist=false fi done if [ "$all_exist" = false ]; then return 1 fi } print_summary() { echo "" echo -e "${GREEN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}" echo -e "${GREEN} ✅ ALL VALIDATIONS PASSED${NC}" echo -e "${GREEN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}" echo "" } # Main execution main() { log_info "Starting validation for YouTube Audio Extension..." log_info "Project root: $PROJECT_ROOT" # Always run these checks validate_manifest || exit 1 check_required_files || exit 1 # Run npm-based checks if package.json exists if check_dependencies; then run_linter || exit 1 run_format_check run_tests || exit 1 check_coverage fi print_summary } main "$@" ================================================ FILE: tests/setup.js ================================================ /** * Jest test setup file * Configures Chrome API mocks for browser extension testing */ // Mock Chrome API const createMockStorage = () => { let storage = {}; return { get: jest.fn((keys, callback) => { if (typeof keys === 'string') { callback({ [keys]: storage[keys] }); } else if (Array.isArray(keys)) { const result = {}; keys.forEach((key) => { result[key] = storage[key]; }); callback(result); } else { callback(storage); } }), set: jest.fn((items, callback) => { Object.assign(storage, items); if (callback) callback(); }), clear: jest.fn((callback) => { storage = {}; if (callback) callback(); }), _getStorage: () => storage, _setStorage: (data) => { storage = data; }, }; }; const createMockTabs = () => { const tabs = new Map(); let tabIdCounter = 1; return { get: jest.fn((tabId, callback) => { const tab = tabs.get(tabId) || { id: tabId, active: false }; callback(tab); }), reload: jest.fn((_tabId) => { // Mock reload }), sendMessage: jest.fn((tabId, message, callback) => { if (callback) callback(); }), onRemoved: { addListener: jest.fn(), removeListener: jest.fn(), }, _addTab: (tab) => { const id = tab.id || tabIdCounter++; tabs.set(id, { id, ...tab }); return id; }, _getTabs: () => tabs, _clearTabs: () => tabs.clear(), }; }; const createMockBrowserAction = () => ({ setIcon: jest.fn(), onClicked: { addListener: jest.fn(), removeListener: jest.fn(), }, }); const createMockWebRequest = () => { const listeners = []; return { onBeforeRequest: { addListener: jest.fn((callback, filter, extraInfoSpec) => { listeners.push({ callback, filter, extraInfoSpec }); }), removeListener: jest.fn((callback) => { const index = listeners.findIndex((l) => l.callback === callback); if (index !== -1) { listeners.splice(index, 1); } }), _getListeners: () => listeners, }, }; }; const createMockRuntime = () => ({ sendMessage: jest.fn(), onMessage: { addListener: jest.fn(), removeListener: jest.fn(), }, }); // Create the chrome mock object global.chrome = { storage: { local: createMockStorage(), }, tabs: createMockTabs(), browserAction: createMockBrowserAction(), webRequest: createMockWebRequest(), runtime: createMockRuntime(), }; // Reset mocks before each test beforeEach(() => { jest.clearAllMocks(); global.chrome.storage.local = createMockStorage(); global.chrome.tabs = createMockTabs(); global.chrome.browserAction = createMockBrowserAction(); global.chrome.webRequest = createMockWebRequest(); global.chrome.runtime = createMockRuntime(); }); // Helper to create mock video element global.createMockVideoElement = () => { const video = document.createElement('video'); video.src = ''; video.paused = true; video.play = jest.fn(() => Promise.resolve()); video.pause = jest.fn(); return video; }; // Helper to simulate DOM ready global.waitForDom = () => new Promise((resolve) => setTimeout(resolve, 0)); ================================================ FILE: tests/unit/global.test.js ================================================ /** * Unit tests for global.js - Background script * Tests the core functionality of the YouTube Audio extension */ describe('Background Script (global.js)', () => { // Import the functions we need to test by evaluating the script let removeURLParameters; let reloadTab; let processRequest; let enableExtension; let disableExtension; let saveSettings; let tabIds; beforeEach(() => { // Reset the DOM and mocks document.body.innerHTML = ''; jest.clearAllMocks(); // Create fresh tabIds set tabIds = new Set(); // Define the functions as they are in global.js removeURLParameters = function (url, parameters) { parameters.forEach(function (parameter) { const urlparts = url.split('?'); if (urlparts.length >= 2) { const prefix = encodeURIComponent(parameter) + '='; const pars = urlparts[1].split(/[&;]/g); for (let i = pars.length; i-- > 0; ) { if (pars[i].lastIndexOf(prefix, 0) !== -1) { pars.splice(i, 1); } } url = urlparts[0] + '?' + pars.join('&'); } }); return url; }; reloadTab = function () { for (const tabId of tabIds) { chrome.tabs.get(tabId, function (tab) { if (tab.active) { chrome.tabs.reload(tabId); return; } }); } }; processRequest = function (details) { if (!tabIds.has(details.tabId)) { return; } if (details.url.indexOf('mime=audio') !== -1 && !details.url.includes('live=1')) { const parametersToBeRemoved = ['range', 'rn', 'rbuf']; const audioURL = removeURLParameters(details.url, parametersToBeRemoved); chrome.tabs.sendMessage(details.tabId, { url: audioURL }); } }; enableExtension = function () { chrome.browserAction.setIcon({ path: { 128: 'img/icon128.png', 38: 'img/icon38.png', }, }); chrome.webRequest.onBeforeRequest.addListener(processRequest, { urls: [''] }, [ 'blocking', ]); }; disableExtension = function () { chrome.browserAction.setIcon({ path: { 38: 'img/disabled_icon38.png', }, }); chrome.webRequest.onBeforeRequest.removeListener(processRequest); }; saveSettings = function (currentState) { chrome.storage.local.set({ youtube_audio_state: currentState }); }; }); describe('removeURLParameters', () => { it('should remove specified parameters from URL', () => { const url = 'https://example.com/video?range=0-1000&rn=1&mime=audio&other=value'; const result = removeURLParameters(url, ['range', 'rn']); expect(result).toBe('https://example.com/video?mime=audio&other=value'); }); it('should handle URL with no query parameters', () => { const url = 'https://example.com/video'; const result = removeURLParameters(url, ['range']); expect(result).toBe('https://example.com/video'); }); it('should handle URL when parameter does not exist', () => { const url = 'https://example.com/video?mime=audio&other=value'; const result = removeURLParameters(url, ['nonexistent']); expect(result).toBe('https://example.com/video?mime=audio&other=value'); }); it('should remove all specified parameters', () => { const url = 'https://example.com/video?range=0-1000&rn=1&rbuf=500&mime=audio'; const result = removeURLParameters(url, ['range', 'rn', 'rbuf']); expect(result).toBe('https://example.com/video?mime=audio'); }); it('should handle semicolon separators', () => { const url = 'https://example.com/video?range=0-1000;rn=1;mime=audio'; const result = removeURLParameters(url, ['range', 'rn']); expect(result).toBe('https://example.com/video?mime=audio'); }); it('should handle empty parameters array', () => { const url = 'https://example.com/video?param=value'; const result = removeURLParameters(url, []); expect(result).toBe('https://example.com/video?param=value'); }); }); describe('reloadTab', () => { it('should reload active tabs in tabIds set', () => { tabIds.add(1); tabIds.add(2); // Mock chrome.tabs.get to return active tab for tabId 1 chrome.tabs.get.mockImplementation((tabId, callback) => { callback({ id: tabId, active: tabId === 1 }); }); reloadTab(); expect(chrome.tabs.get).toHaveBeenCalledTimes(2); expect(chrome.tabs.reload).toHaveBeenCalledWith(1); }); it('should not reload if no tabs are in set', () => { reloadTab(); expect(chrome.tabs.get).not.toHaveBeenCalled(); expect(chrome.tabs.reload).not.toHaveBeenCalled(); }); it('should not reload inactive tabs', () => { tabIds.add(1); chrome.tabs.get.mockImplementation((tabId, callback) => { callback({ id: tabId, active: false }); }); reloadTab(); expect(chrome.tabs.get).toHaveBeenCalledTimes(1); expect(chrome.tabs.reload).not.toHaveBeenCalled(); }); }); describe('processRequest', () => { beforeEach(() => { tabIds.add(1); }); it('should process audio URL and send message to tab', () => { const details = { tabId: 1, url: 'https://youtube.com/video?mime=audio&range=0-1000&rn=1&rbuf=500', }; processRequest(details); expect(chrome.tabs.sendMessage).toHaveBeenCalledWith(1, { url: 'https://youtube.com/video?mime=audio', }); }); it('should ignore requests from tabs not in tabIds', () => { const details = { tabId: 999, url: 'https://youtube.com/video?mime=audio', }; processRequest(details); expect(chrome.tabs.sendMessage).not.toHaveBeenCalled(); }); it('should ignore non-audio URLs', () => { const details = { tabId: 1, url: 'https://youtube.com/video?mime=video', }; processRequest(details); expect(chrome.tabs.sendMessage).not.toHaveBeenCalled(); }); it('should ignore live streams', () => { const details = { tabId: 1, url: 'https://youtube.com/video?mime=audio&live=1', }; processRequest(details); expect(chrome.tabs.sendMessage).not.toHaveBeenCalled(); }); }); describe('enableExtension', () => { it('should set active icon and add webRequest listener', () => { enableExtension(); expect(chrome.browserAction.setIcon).toHaveBeenCalledWith({ path: { 128: 'img/icon128.png', 38: 'img/icon38.png', }, }); expect(chrome.webRequest.onBeforeRequest.addListener).toHaveBeenCalledWith( expect.any(Function), { urls: [''] }, ['blocking'] ); }); }); describe('disableExtension', () => { it('should set disabled icon and remove webRequest listener', () => { disableExtension(); expect(chrome.browserAction.setIcon).toHaveBeenCalledWith({ path: { 38: 'img/disabled_icon38.png', }, }); expect(chrome.webRequest.onBeforeRequest.removeListener).toHaveBeenCalledWith( expect.any(Function) ); }); }); describe('saveSettings', () => { it('should save state to chrome.storage.local', () => { saveSettings(true); expect(chrome.storage.local.set).toHaveBeenCalledWith({ youtube_audio_state: true, }); }); it('should save false state', () => { saveSettings(false); expect(chrome.storage.local.set).toHaveBeenCalledWith({ youtube_audio_state: false, }); }); }); describe('Tab management', () => { it('should add tab to tabIds on message', () => { // Simulate adding tab tabIds.add(42); expect(tabIds.has(42)).toBe(true); }); it('should remove tab from tabIds on tab close', () => { tabIds.add(42); tabIds.delete(42); expect(tabIds.has(42)).toBe(false); }); }); }); ================================================ FILE: tests/unit/options.test.js ================================================ /** * Unit tests for options.js - Options page script * Tests the options page functionality */ describe('Options Script (options.js)', () => { beforeEach(() => { // Reset the DOM document.body.innerHTML = `
`; jest.clearAllMocks(); }); describe('Checkbox initialization', () => { it('should find disable-video-text checkbox', () => { const checkbox = document.getElementById('disable-video-text'); expect(checkbox).not.toBeNull(); expect(checkbox.type).toBe('checkbox'); }); it('should initialize checkbox as unchecked when storage is empty', () => { const checkbox = document.getElementById('disable-video-text'); chrome.storage.local._setStorage({}); chrome.storage.local.get('disable_video_text', (values) => { checkbox.checked = values.disable_video_text ? true : false; }); // Default should be unchecked (false) expect(checkbox.checked).toBe(false); }); it('should initialize checkbox as checked when storage value is true', () => { const checkbox = document.getElementById('disable-video-text'); chrome.storage.local._setStorage({ disable_video_text: true }); chrome.storage.local.get('disable_video_text', (values) => { checkbox.checked = values.disable_video_text ? true : false; }); expect(checkbox.checked).toBe(true); }); it('should initialize checkbox as unchecked when storage value is false', () => { const checkbox = document.getElementById('disable-video-text'); chrome.storage.local._setStorage({ disable_video_text: false }); chrome.storage.local.get('disable_video_text', (values) => { checkbox.checked = values.disable_video_text ? true : false; }); expect(checkbox.checked).toBe(false); }); }); describe('optionChanged handler', () => { it('should save option when checkbox changes to checked', () => { const checkbox = document.getElementById('disable-video-text'); checkbox.checked = true; // Simulate the optionChanged function const optionChanged = function () { chrome.storage.local.set({ disable_video_text: checkbox.checked, }); }; optionChanged(); expect(chrome.storage.local.set).toHaveBeenCalledWith({ disable_video_text: true, }); }); it('should save option when checkbox changes to unchecked', () => { const checkbox = document.getElementById('disable-video-text'); checkbox.checked = false; const optionChanged = function () { chrome.storage.local.set({ disable_video_text: checkbox.checked, }); }; optionChanged(); expect(chrome.storage.local.set).toHaveBeenCalledWith({ disable_video_text: false, }); }); it('should trigger storage update on change event', () => { const checkbox = document.getElementById('disable-video-text'); const optionChanged = function () { chrome.storage.local.set({ disable_video_text: checkbox.checked, }); }; // Add the event listener checkbox.addEventListener('change', optionChanged); // Simulate change checkbox.checked = true; checkbox.dispatchEvent(new Event('change')); expect(chrome.storage.local.set).toHaveBeenCalled(); }); }); describe('DOM element handling', () => { it('should handle missing checkbox gracefully', () => { document.body.innerHTML = ''; const checkbox = document.getElementById('disable-video-text'); expect(checkbox).toBeNull(); // The actual code checks if checkbox exists before adding listener if (checkbox) { checkbox.addEventListener('change', jest.fn()); } // Should not throw error expect(true).toBe(true); }); }); describe('Storage integration', () => { it('should persist checkbox state across sessions', () => { const checkbox = document.getElementById('disable-video-text'); // Set initial state chrome.storage.local.set({ disable_video_text: true }); // Simulate reloading page and reading storage chrome.storage.local.get('disable_video_text', (values) => { checkbox.checked = values.disable_video_text ? true : false; }); expect(chrome.storage.local.set).toHaveBeenCalledWith({ disable_video_text: true, }); }); }); }); ================================================ FILE: tests/unit/youtube_audio.test.js ================================================ /** * Unit tests for youtube_audio.js - Content script * Tests the YouTube Audio content script functionality */ describe('Content Script (youtube_audio.js)', () => { let makeSetAudioURL; beforeEach(() => { document.body.innerHTML = ''; jest.clearAllMocks(); // Define the function as it is in youtube_audio.js makeSetAudioURL = function (videoElement, url) { if (videoElement.src != url) { const paused = videoElement.paused; videoElement.src = url; if (paused === false) { videoElement.play(); } } }; }); describe('makeSetAudioURL', () => { it('should set video src to audio URL when different', () => { const video = createMockVideoElement(); video.src = 'https://old-url.com'; makeSetAudioURL(video, 'https://new-audio-url.com'); // Browser normalizes URLs by adding trailing slash expect(video.src).toContain('https://new-audio-url.com'); }); it('should not change src when URL is the same', () => { const video = createMockVideoElement(); video.src = 'https://same-url.com'; makeSetAudioURL(video, 'https://same-url.com'); // play should not be called since src didn't change expect(video.play).not.toHaveBeenCalled(); }); it('should call play() if video was playing', () => { const video = createMockVideoElement(); // Set up video as playing (paused = false) Object.defineProperty(video, 'paused', { value: false, writable: true, }); video.src = 'https://old-url.com/'; makeSetAudioURL(video, 'https://new-audio-url.com'); // Verify the new src was set expect(video.src).toContain('new-audio-url'); }); it('should not call play() if video was paused', () => { const video = createMockVideoElement(); video.src = 'https://old-url.com'; video.paused = true; // Video was paused makeSetAudioURL(video, 'https://new-audio-url.com'); expect(video.play).not.toHaveBeenCalled(); }); }); describe('Runtime message handling', () => { it('should register runtime message listener on chrome.runtime', () => { // Simulate the content script registering its listener chrome.runtime.sendMessage('enable-youtube-audio'); expect(chrome.runtime.sendMessage).toHaveBeenCalledWith('enable-youtube-audio'); }); }); describe('Audio only notification', () => { beforeEach(() => { // Create a mock DOM structure like YouTube document.body.innerHTML = `
`; }); it('should create notification div with correct class', () => { const extensionAlert = document.createElement('div'); extensionAlert.className = 'audio_only_div'; const alertText = document.createElement('p'); alertText.className = 'alert_text'; alertText.innerHTML = 'Youtube Audio Extension is running.'; extensionAlert.appendChild(alertText); document.body.appendChild(extensionAlert); const notificationDiv = document.querySelector('.audio_only_div'); expect(notificationDiv).not.toBeNull(); expect(notificationDiv.className).toBe('audio_only_div'); }); it('should contain correct notification text', () => { const extensionAlert = document.createElement('div'); extensionAlert.className = 'audio_only_div'; const alertText = document.createElement('p'); alertText.className = 'alert_text'; alertText.innerHTML = 'Youtube Audio Extension is running. It disables the video stream and uses only the audio stream'; extensionAlert.appendChild(alertText); document.body.appendChild(extensionAlert); const textElement = document.querySelector('.alert_text'); expect(textElement.innerHTML).toContain('Youtube Audio Extension is running'); }); it('should not add duplicate notification divs', () => { // Add first notification const div1 = document.createElement('div'); div1.className = 'audio_only_div'; document.body.appendChild(div1); // Check that we have one let divs = document.getElementsByClassName('audio_only_div'); expect(divs.length).toBe(1); // Simulate the check from the script const audioOnlyDivs = document.getElementsByClassName('audio_only_div'); if (audioOnlyDivs.length === 0) { const div2 = document.createElement('div'); div2.className = 'audio_only_div'; document.body.appendChild(div2); } // Should still be only one divs = document.getElementsByClassName('audio_only_div'); expect(divs.length).toBe(1); }); }); describe('Storage integration', () => { it('should respect disable_video_text setting when true', () => { chrome.storage.local._setStorage({ disable_video_text: true }); chrome.storage.local.get('disable_video_text', (values) => { const disableVideoText = values.disable_video_text ? true : false; expect(disableVideoText).toBe(true); }); }); it('should respect disable_video_text setting when false', () => { chrome.storage.local._setStorage({ disable_video_text: false }); chrome.storage.local.get('disable_video_text', (values) => { const disableVideoText = values.disable_video_text ? true : false; expect(disableVideoText).toBe(false); }); }); it('should default to false when setting not set', () => { chrome.storage.local._setStorage({}); chrome.storage.local.get('disable_video_text', (values) => { const disableVideoText = values.disable_video_text ? true : false; expect(disableVideoText).toBe(false); }); }); }); }); ================================================ FILE: website/css/styles.css ================================================ /* ========================================================================== YouTube Audio - Website Styles A teal/cyan color palette for a modern, elegant design ========================================================================== */ /* CSS Variables - Teal/Cyan Color Palette */ :root { /* Primary Colors - Teal/Cyan */ --color-primary: #0d9488; --color-primary-light: #14b8a6; --color-primary-dark: #0f766e; --color-primary-50: #f0fdfa; --color-primary-100: #ccfbf1; --color-primary-200: #99f6e4; --color-primary-500: #14b8a6; --color-primary-600: #0d9488; --color-primary-700: #0f766e; --color-primary-900: #134e4a; /* Accent Colors */ --color-accent: #06b6d4; --color-accent-light: #22d3ee; --color-accent-dark: #0891b2; /* Neutral Colors */ --color-bg: #0f172a; --color-bg-light: #1e293b; --color-bg-lighter: #334155; --color-text: #f8fafc; --color-text-muted: #94a3b8; --color-text-dim: #64748b; /* Semantic Colors */ --color-success: #10b981; --color-error: #ef4444; /* Typography */ --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; --font-mono: 'JetBrains Mono', Consolas, Monaco, monospace; /* Spacing */ --spacing-xs: 0.25rem; --spacing-sm: 0.5rem; --spacing-md: 1rem; --spacing-lg: 1.5rem; --spacing-xl: 2rem; --spacing-2xl: 3rem; --spacing-3xl: 4rem; /* Border Radius */ --radius-sm: 0.375rem; --radius-md: 0.5rem; --radius-lg: 0.75rem; --radius-xl: 1rem; --radius-full: 9999px; /* Shadows */ --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3); --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3); --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3); --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.3); --shadow-glow: 0 0 40px rgba(20, 184, 166, 0.3); /* Transitions */ --transition-fast: 150ms ease; --transition-base: 250ms ease; --transition-slow: 350ms ease; } /* Reset & Base */ *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; } html { scroll-behavior: smooth; } body { font-family: var(--font-sans); background-color: var(--color-bg); color: var(--color-text); line-height: 1.6; overflow-x: hidden; } /* Container */ .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 var(--spacing-lg); } /* Navigation */ .navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 100; padding: var(--spacing-md) 0; background: rgba(15, 23, 42, 0.8); backdrop-filter: blur(12px); border-bottom: 1px solid rgba(255, 255, 255, 0.05); } .navbar .container { display: flex; align-items: center; justify-content: space-between; } .logo { display: flex; align-items: center; gap: var(--spacing-sm); text-decoration: none; font-size: 1.25rem; font-weight: 700; color: var(--color-text); } .logo-icon { font-size: 1.5rem; } .nav-links { display: flex; align-items: center; gap: var(--spacing-xl); } .nav-links a { color: var(--color-text-muted); text-decoration: none; font-weight: 500; transition: color var(--transition-fast); } .nav-links a:hover { color: var(--color-primary-light); } .github-link { display: flex; align-items: center; gap: var(--spacing-sm); padding: var(--spacing-sm) var(--spacing-md); background: var(--color-bg-light); border-radius: var(--radius-md); transition: background var(--transition-fast); } .github-link:hover { background: var(--color-bg-lighter); } .github-link svg { width: 20px; height: 20px; } .mobile-menu-btn { display: none; flex-direction: column; gap: 4px; padding: var(--spacing-sm); background: none; border: none; cursor: pointer; } .mobile-menu-btn span { width: 24px; height: 2px; background: var(--color-text); transition: var(--transition-fast); } /* Hero Section */ .hero { position: relative; min-height: 100vh; display: flex; align-items: center; padding: 8rem 0 4rem; overflow: hidden; } .hero-bg { position: absolute; inset: 0; overflow: hidden; } .gradient-orb { position: absolute; border-radius: 50%; filter: blur(80px); opacity: 0.4; } .orb-1 { width: 600px; height: 600px; background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%); top: -200px; right: -200px; } .orb-2 { width: 400px; height: 400px; background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary-dark) 100%); bottom: -100px; left: -100px; } .orb-3 { width: 300px; height: 300px; background: var(--color-primary-light); top: 50%; left: 50%; transform: translate(-50%, -50%); opacity: 0.2; } .hero .container { position: relative; z-index: 1; text-align: center; } .hero-badge { display: inline-flex; align-items: center; gap: var(--spacing-sm); padding: var(--spacing-sm) var(--spacing-md); background: rgba(20, 184, 166, 0.1); border: 1px solid rgba(20, 184, 166, 0.2); border-radius: var(--radius-full); font-size: 0.875rem; color: var(--color-primary-light); margin-bottom: var(--spacing-xl); } .hero-title { font-size: clamp(2.5rem, 5vw, 4rem); font-weight: 700; line-height: 1.1; margin-bottom: var(--spacing-lg); } .highlight { background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-accent) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; } .hero-subtitle { font-size: 1.25rem; color: var(--color-text-muted); max-width: 600px; margin: 0 auto var(--spacing-2xl); } /* Demo Section */ .demo-container { display: flex; align-items: center; justify-content: center; gap: var(--spacing-lg); margin-bottom: var(--spacing-2xl); flex-wrap: wrap; } .demo-card { background: var(--color-bg-light); border: 1px solid var(--color-bg-lighter); border-radius: var(--radius-lg); padding: var(--spacing-lg); width: 280px; transition: var(--transition-base); } .demo-card.active { border-color: var(--color-primary); box-shadow: var(--shadow-glow); } .demo-header { display: flex; align-items: center; gap: var(--spacing-md); margin-bottom: var(--spacing-md); } .demo-icon { font-size: 2rem; } .demo-label { font-weight: 600; } .demo-content p { color: var(--color-text-muted); margin-bottom: var(--spacing-md); } .demo-list { list-style: none; } .demo-list li { display: flex; align-items: center; gap: var(--spacing-sm); margin-bottom: var(--spacing-xs); font-size: 0.9rem; } .demo-list.negative li::before { content: '✗'; color: var(--color-error); } .demo-list.positive li::before { content: '✓'; color: var(--color-success); } .demo-arrow { font-size: 2rem; color: var(--color-primary-light); } /* Buttons */ .btn { display: inline-flex; align-items: center; justify-content: center; gap: var(--spacing-sm); padding: var(--spacing-md) var(--spacing-xl); font-size: 1rem; font-weight: 600; text-decoration: none; border-radius: var(--radius-md); border: none; cursor: pointer; transition: var(--transition-fast); } .btn-primary { background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%); color: white; box-shadow: var(--shadow-md); } .btn-primary:hover { background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary) 100%); box-shadow: var(--shadow-lg), var(--shadow-glow); transform: translateY(-2px); } .btn-secondary { background: var(--color-bg-light); color: var(--color-text); border: 1px solid var(--color-bg-lighter); } .btn-secondary:hover { background: var(--color-bg-lighter); } .btn-outline { background: transparent; color: var(--color-text-muted); border: 1px solid var(--color-bg-lighter); } .btn-outline:hover { border-color: var(--color-primary); color: var(--color-primary-light); } .btn-icon { width: 20px; height: 20px; } .cta-buttons { display: flex; gap: var(--spacing-md); justify-content: center; flex-wrap: wrap; } /* Sections */ section { padding: var(--spacing-3xl) 0; } .section-header { text-align: center; margin-bottom: var(--spacing-2xl); } .section-header h2 { font-size: clamp(1.75rem, 3vw, 2.5rem); font-weight: 700; margin-bottom: var(--spacing-sm); } .section-header p { color: var(--color-text-muted); font-size: 1.1rem; } /* Features Section */ .features { background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-light) 100%); } .features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: var(--spacing-xl); } .feature-card { background: var(--color-bg); border: 1px solid var(--color-bg-lighter); border-radius: var(--radius-lg); padding: var(--spacing-xl); transition: var(--transition-base); } .feature-card:hover { border-color: var(--color-primary); transform: translateY(-4px); box-shadow: var(--shadow-lg); } .feature-icon { font-size: 2.5rem; margin-bottom: var(--spacing-md); } .feature-card h3 { font-size: 1.25rem; margin-bottom: var(--spacing-sm); } .feature-card p { color: var(--color-text-muted); } /* Install Section */ .install { background: var(--color-bg-light); } .install-options { display: flex; gap: var(--spacing-xl); justify-content: center; flex-wrap: wrap; } .install-card { background: var(--color-bg); border: 1px solid var(--color-bg-lighter); border-radius: var(--radius-xl); padding: var(--spacing-2xl); text-align: center; width: 300px; transition: var(--transition-base); } .install-card.primary { border-color: var(--color-primary); box-shadow: var(--shadow-glow); } .install-icon { width: 80px; height: 80px; margin: 0 auto var(--spacing-lg); display: flex; align-items: center; justify-content: center; background: rgba(20, 184, 166, 0.1); border-radius: var(--radius-lg); } .install-icon svg { fill: var(--color-primary-light); } .install-icon.chrome svg { fill: var(--color-text-muted); } .install-card h3 { font-size: 1.5rem; margin-bottom: var(--spacing-sm); } .install-card p { color: var(--color-text-muted); margin-bottom: var(--spacing-lg); } /* How It Works Section */ .steps { display: flex; gap: var(--spacing-2xl); justify-content: center; flex-wrap: wrap; } .step { text-align: center; max-width: 300px; } .step-number { width: 60px; height: 60px; display: flex; align-items: center; justify-content: center; margin: 0 auto var(--spacing-lg); background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%); border-radius: 50%; font-size: 1.5rem; font-weight: 700; } .step h3 { margin-bottom: var(--spacing-sm); } .step p { color: var(--color-text-muted); } /* FAQ Section */ .faq { background: var(--color-bg-light); } .faq-list { max-width: 800px; margin: 0 auto; } .faq-item { border-bottom: 1px solid var(--color-bg-lighter); } .faq-question { width: 100%; display: flex; justify-content: space-between; align-items: center; padding: var(--spacing-lg) 0; background: none; border: none; color: var(--color-text); font-size: 1.1rem; font-weight: 500; cursor: pointer; text-align: left; } .faq-icon { font-size: 1.5rem; color: var(--color-primary-light); transition: var(--transition-fast); } .faq-item.active .faq-icon { transform: rotate(45deg); } .faq-answer { max-height: 0; overflow: hidden; transition: max-height var(--transition-base); } .faq-item.active .faq-answer { max-height: 200px; } .faq-answer p { padding-bottom: var(--spacing-lg); color: var(--color-text-muted); } /* Footer */ .footer { background: var(--color-bg); border-top: 1px solid var(--color-bg-lighter); padding: var(--spacing-2xl) 0; } .footer-content { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: var(--spacing-lg); margin-bottom: var(--spacing-lg); } .footer-brand { display: flex; align-items: center; gap: var(--spacing-sm); font-weight: 600; } .footer-links { display: flex; gap: var(--spacing-xl); } .footer-links a { color: var(--color-text-muted); text-decoration: none; transition: color var(--transition-fast); } .footer-links a:hover { color: var(--color-primary-light); } .footer-bottom { text-align: center; color: var(--color-text-dim); font-size: 0.9rem; } .footer-bottom a { color: var(--color-primary-light); text-decoration: none; } /* Mobile Responsive */ @media (max-width: 768px) { .nav-links { display: none; } .mobile-menu-btn { display: flex; } .hero-title { font-size: 2rem; } .demo-container { flex-direction: column; } .demo-arrow { transform: rotate(90deg); } .demo-card { width: 100%; max-width: 320px; } .features-grid { grid-template-columns: 1fr; } .install-options { flex-direction: column; align-items: center; } .install-card { width: 100%; max-width: 320px; } .steps { flex-direction: column; align-items: center; } .footer-content { flex-direction: column; text-align: center; } .footer-links { flex-wrap: wrap; justify-content: center; } } ================================================ FILE: website/index.html ================================================ YouTube Audio - Stream Only Audio from YouTube | Save Battery & Bandwidth
🔋 Save Battery & Bandwidth

Stream only audio from YouTube

A lightweight browser extension that disables video and streams audio-only. Perfect for music, podcasts, and background listening.

📺
Before

Video + Audio streaming

  • High battery drain
  • High data usage
  • Heats up device
→
🎵
With YouTube Audio

Audio-only streaming

  • Extended battery life
  • Reduced data usage
  • Cool & quiet device
Install for Firefox Other Browsers

Why use YouTube Audio?

Simple, efficient, and battery-friendly

🔋

Save Battery

Video decoding is one of the biggest battery drains. By streaming audio only, your laptop or phone stays cooler and lasts longer.

📶

Save Bandwidth

Audio streams are much smaller than video. Save data on metered connections and enjoy faster streaming even on slow networks.

🎯

One-Click Toggle

Simply click the extension icon to enable or disable. No complicated settings - just instant control over your streaming.

🌡️

Reduce Heat

Without video decoding, your device stays cool. Perfect for long listening sessions or when your device is already working hard.

🔒

Privacy Focused

No tracking, no analytics, no external servers. The extension works entirely locally in your browser.

⚡

Lightweight

Minimal footprint, zero performance impact. The extension only activates when you're on YouTube.

Install YouTube Audio

Available for Firefox. More browsers coming soon!

Firefox

Recommended • Full support

Install Now

Chrome

Coming soon

View on GitHub

How it works

Simple and automatic

1

Install the Extension

Add YouTube Audio to your browser from the Firefox Add-ons store.

2

Visit YouTube

Navigate to any YouTube video you want to listen to.

3

Enjoy Audio-Only

The extension automatically streams audio only. Toggle with one click if needed.

Frequently Asked Questions

Yes, it works with regular YouTube videos. However, live streams are not supported as they require real-time video synchronization.

Audio streams are typically 10-20x smaller than video. A 1080p video might use 5-10 Mbps, while audio uses only 128-256 Kbps.

Yes! Simply click the extension icon to disable audio-only mode, then refresh the page to watch the video normally.

Absolutely. The extension works entirely locally in your browser. It doesn't collect any data, has no analytics, and communicates with no external servers.

We're working on Chrome support! The extension architecture works on both browsers, but we need a Chrome Web Store developer account to publish it. Contributions are welcome!

================================================ FILE: website/js/main.js ================================================ /** * YouTube Audio Website - Main JavaScript */ document.addEventListener('DOMContentLoaded', function () { // Mobile menu toggle initMobileMenu(); // FAQ accordion initFAQ(); // Smooth scrolling for anchor links initSmoothScroll(); // Navbar scroll effect initNavbarScroll(); }); /** * Initialize mobile menu toggle */ function initMobileMenu() { const menuBtn = document.getElementById('mobileMenuBtn'); const navLinks = document.querySelector('.nav-links'); if (!menuBtn || !navLinks) return; menuBtn.addEventListener('click', function () { menuBtn.classList.toggle('active'); navLinks.classList.toggle('mobile-open'); }); } /** * Initialize FAQ accordion */ function initFAQ() { const faqItems = document.querySelectorAll('.faq-item'); faqItems.forEach(function (item) { const question = item.querySelector('.faq-question'); if (!question) return; question.addEventListener('click', function () { // Close other items faqItems.forEach(function (otherItem) { if (otherItem !== item) { otherItem.classList.remove('active'); } }); // Toggle current item item.classList.toggle('active'); }); }); } /** * Initialize smooth scrolling for anchor links */ function initSmoothScroll() { const anchors = document.querySelectorAll('a[href^="#"]'); anchors.forEach(function (anchor) { anchor.addEventListener('click', function (e) { const href = this.getAttribute('href'); if (href === '#') return; const target = document.querySelector(href); if (!target) return; e.preventDefault(); const navHeight = document.querySelector('.navbar')?.offsetHeight || 0; const targetPosition = target.getBoundingClientRect().top + window.pageYOffset - navHeight; window.scrollTo({ top: targetPosition, behavior: 'smooth', }); }); }); } /** * Initialize navbar scroll effect */ function initNavbarScroll() { const navbar = document.getElementById('navbar'); if (!navbar) return; let lastScroll = 0; window.addEventListener('scroll', function () { const currentScroll = window.pageYOffset; if (currentScroll > 100) { navbar.classList.add('scrolled'); } else { navbar.classList.remove('scrolled'); } lastScroll = currentScroll; }); } ================================================ FILE: website/llms.txt ================================================ # YouTube Audio > Stream only audio from YouTube videos - Save battery and bandwidth ## What is YouTube Audio? YouTube Audio is a browser extension for Firefox (and Chrome soon) that disables video playback and streams only the audio from YouTube videos. This is perfect for listening to music, podcasts, or any audio content without the battery drain and bandwidth usage of video. ## Key Features - **One-Click Toggle**: Enable/disable audio-only mode with a single click - **Battery Saver**: No video decoding means significantly less battery usage - **Bandwidth Saver**: Audio streams are 10-20x smaller than video streams - **Privacy Focused**: No tracking, no analytics, works entirely locally - **Lightweight**: Minimal footprint, only activates on YouTube ## How It Works 1. The extension intercepts YouTube requests 2. When an audio stream is detected, it replaces the video stream 3. The video player shows an audio-only notification 4. Toggle the extension icon to switch between audio-only and normal mode ## Technical Details - **Platform**: WebExtension (Firefox, Chrome compatible) - **Manifest Version**: V2 - **APIs Used**: WebRequest, Storage, Tabs, BrowserAction - **Language**: JavaScript (ES6+) ## Installation Firefox: https://addons.mozilla.org/en-US/firefox/addon/youtube-audio/ Chrome: Coming soon (contributions welcome!) ## Repository GitHub: https://github.com/animeshkundu/youtube-audio ## License MIT License - Free and open source ## Author Animesh Kundu GitHub: https://github.com/animeshkundu ## Documentation - Main documentation: docs/ - Architecture: docs/architecture/ - Specifications: docs/specs/ - Agent Instructions: docs/agent-instructions/ ================================================ FILE: website/robots.txt ================================================ # YouTube Audio Website # https://animeshkundu.github.io/youtube-audio/ User-agent: * Allow: / # Sitemaps Sitemap: https://animeshkundu.github.io/youtube-audio/sitemap.xml # LLM/AI crawlers welcome User-agent: GPTBot Allow: / User-agent: Google-Extended Allow: / User-agent: Anthropic-AI Allow: / User-agent: Claude-Web Allow: / User-agent: ChatGPT-User Allow: / User-agent: cohere-ai Allow: / User-agent: PerplexityBot Allow: / # LLMs.txt # See https://animeshkundu.github.io/youtube-audio/llms.txt for AI-readable project info ================================================ FILE: website/sitemap.xml ================================================ https://animeshkundu.github.io/youtube-audio/ monthly 1.0