Examine source code of Chaptotek

{
  "manifest_version": 2,
  "name": "Chaptotek",
  "version": "1.5.2",
  "description": "Organize YouTube videos into chapters with AI-powered headlines and timecode generation",
  "default_locale": "en",
  "permissions": [
    "activeTab",
    "storage",
    "tabs",
    "https://www.youtube.com/*",
    "https://generativelanguage.googleapis.com/*",
    "https://openrouter.ai/*"
  ],
  "background": {
    "scripts": [
      "lang/JsModuleImporter.js",
      "utils/url-utils.js",
      "background/errorhandler.js",
      "domain/values/VideoUrl.js",
      "domain/values/ModelId.js",
      "domain/values/ApiCredentials.js",
      "domain/values/GenerationProgress.js",
      "domain/entities/VideoTranscript.js",
      "domain/entities/ChapterGeneration.js",
      "domain/entities/BrowserTab.js",
      "domain/entities/InstructionEntry.js",
      "infrastructure/adapters/BrowserStorageAdapter.js",
      "infrastructure/repositories/SessionRepository.js",
      "infrastructure/repositories/TabRegistry.js",
      "infrastructure/repositories/SettingsRepository.js",
      "infrastructure/repositories/InstructionHistoryRepository.js",
      "infrastructure/adapters/BrowserHttpAdapter.js",
      "domain/services/NetworkCommunicator.js",
      "domain/services/GeminiChapterGenerator.js",
      "domain/services/OpenRouterChapterGenerator.js",
      "domain/services/MessageCoordinator.js",
      "domain/services/ChapterGenerator.js",
      "background/prompt-generator.js",
      "background/BaseLLM.js",
      "infrastructure/adapters/GeminiApiAdapter.js",
      "infrastructure/adapters/OpenRouterApiAdapter.js",
      "background/background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.youtube.com/watch*",
        "https://www.youtube.com/shorts*",
        "*://*.youtube.com/*"
      ],
      "js": [
        "content/content.js"
      ],
      "css": [
        "content/content.css"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_action": {
    "default_popup": "popup/popup.html",
    "default_title": "Chaptotek",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "options_page": "options/options.html",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "web_accessible_resources": [
    "results/results.html",
    "results/results.css"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b6e7e2e2-7e2a-4b7e-8e2e-2e2e2e2e2e3e}"
    }
  }
}