wtf is postject?

Postject is a tool that lets you bundle extra files or data directly into an already-compiled program. Instead of shipping your application alongside separate data files, you can embed that data right into the executable file itself. The program can then read this embedded data whenever it runs, treating it as a permanent, read-only resource. The tool works by taking a finished program and injecting your chosen data into it. It supports the three major executable formats: Windows (PE), macOS (Mach-O), and Linux (ELF). Rather than using a hacky workaround, the project modifies each format using that system's standard, native method for embedding binary data. This means the resulting file behaves just like a program that had the data built into it from the very start, avoiding weird compatibility issues. This is useful for developers who want to ship a single, self-contained file. For example, if you are building a desktop application and want to include a default configuration file, a splash-screen image, or a cryptographic certificate, you could use this tool to bake those assets directly into your program. It is also handy for teams building custom single-file installers or command-line tools that need to carry their own bundled assets without requiring users to download extra files. A notable design choice is how it handles the injection process. It uses a "fuse", a specific, hidden text string inside the program that acts like an on/off switch. When you inject a resource, the tool finds this fuse and flips it on, signaling to the program that it now contains embedded data. This allows other tools to detect and safely interact with the injected resources at runtime.