# rclnodejs contributors (sorted alphabetically)

- **[Alaa El Jawad](https://github.com/ejalaa12)**
  - Fix compatibility with ROS2 parameters array types
  - Unit tests for all parameter types
  - Handle concurrent ROS2 client calls, with unit tests

- **[Alex Mikhalev](https://github.com/amikhalev)**
  - Fix build for AMENT_PREFIX_PATH with multiple entries

- **[Felix Divo](https://github.com/felixdivo)**
  - Code cleanup of index.js, tests cases & message generation
  - Improved shutdown behavior
  - Fixed compilation warnings

- **[Hanyia](https://github.com/hanyia)**
  - Benchmark test script

- **[Ian McElroy](https://github.com/imcelroy)**
  - Add descriptor namespace for all interfaces, rostsd_gen improvements
  - Fix compatibility with ROS2 parameters array types
  - Unit tests for all parameter types
  - Handle concurrent ROS2 client calls, with unit tests

- **[Kenny Yuan](https://github.com/kenny-y)**
  - Message features: JS generation, typed arrays, plain JS object, compound msgs, many others...
  - npm publish scripts
  - Mac support

- **[Matt Richard](https://github.com/mattrichard)**
  - ROS2 Actions
  - Guard conditions
  - Node utility methods (countPublishers/subscribers...)
  - TypeScript improvements
  - Node 12 compatibility

- **[Minggang Wang](https://github.com/minggangw)**
  - Author, lead developer, maintainer
  - Core, CI

- **[Mahmoud Alghalayini](https://github.com/mahmoud-ghalayini)**
  - JSON safe serialization improvements
  - Promise-based service calls implementation
  - Add ParameterClient for external parameter access
  - Add structured error handling with class error hierarchy
  - Add ParameterWatcher for real-time parameter monitoring
  - Enhance Message Validation
  - Add TypeScript definitions and non-throwing variants for validator
  - Add MessageIntrospector for message schema inspection
  - Add Observable subscriptions with RxJS support

- **[Martins Mozeiko](https://github.com/martins-mozeiko)**
  - QoS new/delete fix

- **[Qiuzhong](https://github.com/qiuzhong)**
  - Test coverage for actions, topics, multi-array messages, cross platform, security
  - Converted from setTimeout to ROS2 Timer

- **[Teo Koon Peng](https://github.com/koonpeng)**
  - TypeScript improvements
  - Added Client#waitForService
  - Code style improvements, e.g., Prettier formatting
  - Improved code generation smarts and efficiency

- **[Wayne Parrott](https://github.com/wayneparrott)**
  - TypeScript support with interface generation
  - ROS2 parameter support
  - ROS2 lifecycle node
  - Rate class
  - Node class hierarchy