firebase-development-project-setuplisted

# Firebase Project Setup ## Overview This sub-skill guides initializing a new Firebase project with proven architecture patterns. It handles Firebase CLI setup, architecture decisions, emulator configuration, and initial project structure. **Key principles:** - Use TypeScript for all functions - Configure emulators from the start - Choose architecture patterns early (hosting, auth, functions, security) - Set up testing infrastructure immediately ## When This Sub-Skill Applies - Starting a brand new Firebase project - Setting up Firebase for the first time in a repository - User says: "new firebase project", "initialize firebase", "firebase init", "set up firebase" **Do not use for:** - Adding features to existing projects → `firebase-development:add-feature` - Debugging existing setup → `firebase-development:debug` ## Architecture Decisions Use AskUserQuestion to gather these four decisions upfront: ### 1. Hosting Configuration - **Single Site** - One hosting site, simple project - **Multiple Sites (site:)** - Multiple independent URLs - **Multiple with Builds (target:)** - Multiple sites with predeploy hooks **Reference:** `docs/examples/multi-hosting-setup.md` ### 2. Authentication Approach - **API Keys** - MCP tools, server-to-server, programmatic access - **Firebase Auth** - User-facing app with login UI - **Both** - Firebase Auth for web + API keys for tools **Reference:** `docs/examples/api-key-authentication.md` ### 3. Functions Architecture - **Express AP