Fil-C is a memory-safe implementation of C and C++ designed for compatibility with existing software. It aims to eliminate common memory safety errors by using advanced runtime checks, meaning that any unsafe operations are caught immediately, causing a panic in the system. This approach relies on concurrent garbage collection and a unique feature called invisible capabilities (InvisiCaps). The goal is to provide a safer programming environment without introducing escape hatches for unsafe code, ensuring that memory safety is a priority throughout. Many existing C and C++ programs can be compiled and run on Fil-C with little to no modification. Notable examples of software that works well with Fil-C include CPython, OpenSSH, GNU Emacs, and Wayland. The implementation supports advanced programming features like threads, atomics, exceptions, and different shared memory styles, enabling users to run a fully memory-safe Linux userland, including graphical interfaces. Fil-C's compiler is based on clang version 20.1.8 and is designed to integrate smoothly with established build systems such as make, autotools, cmake, and meson. The project is open-source, with the compiler licensed under Apache 2.0 and the runtime under BSD 2-clause. It also offers two standard libraries: musl and glibc, each with its own licensing terms. For community engagement, developers and users can join the Fil-C Discord to collaborate and discuss the language's development.