Provides foundational Firebase CLI setup, CLI installation, version checks (`firebase-tools@latest --version`), CLI login (including --no-localhost), project creation, project selection (`firebase use`), and app config file downloads (`google-services.json`, `GoogleService-Info.plist`). Use ONLY for

Prerequisites Complete these setup steps before proceeding: 1. Local Environment Setup: Verify the environment is properly set up so we can use Firebase tools: Run npx y firebase tools@latest version to check if the Firebase CLI is installed. Verify if the Firebase MCP server is installed using your existing tools. CRITICAL : Before configuring any extensions or agent environments below, you MUST read [references/local env setup.md](references/local env setup.md). DO NOT SKIP this step: if 'firebase basics' is the only Firebase skill available to you, you must follow the reference for your agent environment to set up the full suite of Firebase skills: Gemini CLI : Review [references/setup/gemini cli.md](references/setup/gemini cli.md) Antigravity : Review [references/setup/antigravity.md](references/setup/antigravity.md) Android Studio : Review [references/setup/android studio.md](references/setup/android studio.md) Claude Code : Review [references/setup/claude code.md](references/setup/claude code.md) Cursor : Review [references/setup/cursor.md](references/setup/cursor.md) GitHub Copilot : Review [references/setup/github copilot.md](references/setup/github copilot.md) Other Agents : Review [references/setup/other agents.md](references/setup/other agents.md) 1. Authentication: Ensure you are logged in to Firebase so that commands have the correct permissions. Run npx y firebase tools@latest login . For environments without a browser (e.g., remote shells), use npx y firebase tools@latest login no localhost . The command should output the current user. If you are not logged in, follow the interactive instructions from this command to authenticate. 1. Active Project: Most Firebase tasks require an active project context. [!IMPORTANT] For Agents: Before proceeding with project configuration, you MUST pause and ask the developer if they prefer to: 1. Provide an existing Firebase Project ID , or 1. Create a new Firebase project . If using an existing Project ID: 1. Check the current project by running npx y firebase tools@latest use . 1. If the command outputs Active Project: <project id , confirm with the user if this is the intended project. 1. If not, or if no project is active, set the project provided by the user: If creating a new project: Run the following command to create it: Note: The <project id must be 6 30 characters, lowercase, and can contain digits and hyphens. It must be globally unique. Firebase Usage Principles Adhere to these principles: 1. Use npx for CLI commands: To ensure you always use the latest version of the Firebase CLI, always prepend commands with npx y firebase tools@latest instead of just firebase . For example, use npx y firebase tools@latest version . NEVER suggest the naked firebase command as an alternative. 1. Prioritize official knowledge: For any Firebase related knowledge, consult the developerknowledge search documents MCP tool before falling back to Google Search or your internal knowledge base. Including "Firebase" in your search query significantly improves relevance. 1. Follow Agent Skills for implementation guidance: Skills provide opinionated workflows (CUJs), security rules, and best practices. Always consult them to understand how to implement Firebase features correctly instead of relying on general knowledge. 1. Use Firebase MCP Server tools instead of direct API calls: Whenever you need to interact with remote Firebase APIs (such as fetching Crashlytics logs or executing Data Connect queries), use the tools provided by the Firebase MCP Server instead of attempting manual API calls. 1. Keep Plugin / Agent Skills updated: Since Firebase best practices evolve quickly, regularly check for and install updates to their Firebase plugin or Agent Skills. Similarly, if you encounter issues with outdated tools or commands, follow the steps below based on your agent environment: Antigravity : Follow [references/refresh/antigravity.md](references/refresh/antigravity.md) Gemini CLI : Follow [references/refresh/gemini cli.md](references/refresh/gemini cli.md) Claude Code : Follow [references/refresh/claude.md](references/refresh/claude.md) Cursor : Follow [references/refresh/other agents.md](references/refresh/other agents.md) Android Studio : Follow [references/refresh/android studio.md](references/refresh/android studio.md) Others : Follow [references/refresh/other agents.md](references/refresh/other agents.md) 1. Automate Config File Retrieval: When setting up iOS or Android apps, do NOT direct users to the Firebase Console to download google services.json or GoogleService Info.plist . Instead, use the Firebase CLI to fetch the config programmatically: For Android: npx y firebase tools@latest apps:sdkconfig ANDROID <APP ID project <PROJECT ID For iOS: npx y firebase tools@latest apps:sdkconfig IOS <APP ID project <PROJECT ID Save the output to the appropriate location (e.g., app/google services.json for Android, or a path to be linked by xcode project setup for iOS). References Initialize Firebase: See [references/firebase service init.md](references/firebase service init.md) when you need to initialize new Firebase services using the CLI. Exploring Commands: See [references/firebase cli guide.md](references/firebase cli guide.md) to discover and understand CLI functionality. SDK Setup: For detailed guides on adding Firebase to your app: Web : See [references/web setup.md](references/web setup.md) Android : See [references/android setup.md](references/android setup.md) iOS : See [references/ios setup.md](references/ios setup.md) Common Issues Login Issues: If the browser fails to open during the login step, use npx y firebase tools@latest login no localhost instead. Genkit: If using Genkit, install the skills:

firebase-basics