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+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Overview
+
+This is a TypeScript client library for controlling Eufy Security devices by connecting to Eufy cloud servers and local/remote stations over P2P. The library is published to npm as `eufy-security-client`.
+
+**Important:** This project is NOT affiliated with Anker/Eufy Security. It is a personal project maintained in spare time.
+
+## Development Commands
+
+### Build
+```bash
+npm run build          # Full build (compiles TypeScript)
+npm run build:ts       # TypeScript compilation + copy proto files
+```
+
+### Development
+```bash
+npm run watch          # Watch mode (auto-recompile on changes)
+npm run watch:ts       # Watch TypeScript files only
+```
+
+### Linting
+```bash
+npm run lint           # Run ESLint on TypeScript source files
+```
+
+### Testing
+Currently, there are no tests configured (`npm test` exits with error).
+
+## Architecture
+
+### Core Components
+
+The library is organized into four major subsystems, each with its own directory:
+
+1. **HTTP API (`src/http/`)** - Eufy Cloud API communication
+   - `api.ts`: Main HTTPApi class handling authentication and cloud requests
+   - `device.ts`: Device class hierarchy (Camera, Lock, Doorbell, Sensor types, etc.)
+   - `station.ts`: Station/Hub management
+   - Uses encrypted API v2 communication with RSA/ECDH key exchange
+   - Handles authentication including 2FA and captcha
+
+2. **P2P Communication (`src/p2p/`)** - Direct peer-to-peer connection with stations/devices
+   - `session.ts`: P2PClientProtocol handles UDP-based P2P protocol
+   - Supports local and remote connectivity to stations
+   - Handles livestreaming, video download, commands (lock/unlock, enable/disable, etc.)
+   - Complex packet sequencing and encryption handling
+   - Supports multiple encryption types (none, type1, type2)
+
+3. **Push Notifications (`src/push/`)** - Unified push message interface
+   - `service.ts`: PushNotificationService manages FCM-based notifications
+   - `parser.ts`: Normalizes different push notification types
+   - Handles motion, person detection, doorbell ring events, etc.
+
+4. **MQTT (`src/mqtt/`)** - MQTT subscription for certain devices
+   - Supports Smart Lock Touch & Wifi and similar MQTT-enabled devices
+
+### Main Entry Point
+
+- **`src/eufysecurity.ts`**: The `EufySecurity` class is the high-level orchestrator
+  - Must be initialized with `EufySecurity.initialize()` (async factory pattern)
+  - Manages all stations, devices, and houses
+  - Coordinates HTTP API, P2P connections, push notifications, and MQTT
+  - Emits typed events for device/station state changes
+  - Handles persistent data storage for credentials and state
+
+### Key Design Patterns
+
+- **Typed Event Emitters**: Uses `tiny-typed-emitter` throughout for type-safe events
+- **Async Initialization**: Main classes use static `initialize()` factory methods instead of constructors
+- **Persistent Data**: Credentials and session data saved to filesystem (default: `.eufy-security-client/`)
+- **Property System**: Devices/stations have a metadata-driven property system with read-only/write restrictions
+- **Command Queue**: P2P commands are queued and executed sequentially per station
+
+### Communication Layers
+
+```
+EufySecurity (High-level API)
+    ├── HTTPApi (Cloud API for device metadata, authentication)
+    ├── P2PClientProtocol (Direct station communication for commands/streaming)
+    ├── PushNotificationService (Real-time event notifications)
+    └── MQTTService (MQTT-enabled device events)
+```
+
+### Device Hierarchy
+
+All devices inherit from base `Device` class with specialized subclasses:
+- Camera types: `Camera`, `IndoorCamera`, `SoloCamera`, `FloodlightCamera`, `WallLightCam`, `GarageCamera`
+- Doorbell types: `BatteryDoorbellCamera`, `WiredDoorbellCamera`, `DoorbellLock`
+- Lock types: `Lock`, `LockKeypad`
+- Sensors: `EntrySensor`, `MotionSensor`
+- Other: `Keypad`, `SmartSafe`, `SmartDrop`, `Tracker`
+
+Each device type has specific properties and commands based on hardware capabilities.
+
+## TypeScript Configuration
+
+- Target: ES2022
+- Module: Node16 with Node16 resolution
+- Strict mode enabled
+- Build output: `build/` directory
+- Source maps generated
+- Declaration files (`.d.ts`) generated for npm package
+
+## Publishing
+
+- Main entry: `build/index.js`
+- Requires Node.js >= 20.0.0
+- Uses `prepublishOnly` script to ensure build runs before publishing
+- Proto files (`.proto`) and certificates (`.crt`) are copied to build directory
+
+## P2P Protocol Notes
+
+The P2P protocol is UDP-based with custom sequencing and encryption:
+- Supports local (LAN) and remote (through Eufy cloud) connections
+- Uses magic word `0xf1e2d3c4` in packet headers
+- Multiple encryption modes with AES and RSA
+- Handles livestreaming with separate video/audio packet sequencing
+- Energy-saving devices have different keepalive/timeout strategies
+- Smart locks use BLE-style command structures wrapped in P2P
+
+## Logging
+
+Uses `typescript-logging` with category-based logging:
+- Categories: HTTP, P2P, PUSH, MQTT
+- Configurable log levels per category
+- Default logger can be replaced via `EufySecurity.initialize()` config