F´ is a component-driven framework for developing flight software and embedded systems applications. Originally developed at the Jet Propulsion Laboratory, it decomposes software into discrete components with well-defined interfaces, providing a C++ foundation with core capabilities such as message queues and threads. The framework includes modeling tools for specifying components and their connections with automatic code generation, a collection of ready-to-use components, and testing tools for unit and integration-level validation.
The framework addresses the challenge of building reliable, maintainable software for space missions and embedded systems where component isolation and clear interfaces are critical. Its approach centers on architectural decomposition: developers define components with explicit interfaces, use modeling tools to specify how components connect, and rely on generated code to wire these connections together. This separation of concerns reduces coupling and makes testing and reuse straightforward.
Adoption suits teams building spaceflight systems, CubeSats, SmallSats, instruments, and other embedded applications where reliability and structured development matter. The framework runs on Linux, Windows with WSL, and macOS for development, and supports multiple target platforms for deployment. Teams should expect to work with C++, Python for tooling, and the modeling language for component specification. The README does not compare F´ to alternative frameworks, so no comparative guidance can be offered.
The project maintains active community engagement through GitHub Discussions for questions and improvements, with a dedicated issue tracker for bug reports. A separate community organization hosts third-party contributions and additional flight software development resources. The framework is accompanied by comprehensive documentation including a user manual, tutorials, and a HelloWorld guide to help new developers get started.
