wtf is pi-windows-nul-fix?

pi-windows-nul-fix is a small extension for a tool called Pi that fixes a specific Windows compatibility bug. On Windows, Pi runs shell commands through Git Bash, which is built on MSYS2. When an AI model tells the shell to redirect output somewhere with a command like some-tool --quiet > nul, Git Bash does not understand nul as the null device the way Windows normally does. Instead, it creates a real file literally named nul in the current folder. The README explains why this is a problem: nul is a reserved device name in Windows, so files with that exact name become invisible to the ls command, cannot be opened in most text editors, and cannot be deleted with normal delete commands. Removing them requires a specific PowerShell command that references the file through a special long path prefix. The extension fixes this by intercepting Pi's bash tool right before a command runs and rewriting any bare redirect to nul, in forms like > nul, 2> nul, &> nul, or >> NUL, into the standard Unix equivalent > /dev/null. It is careful about correctness: it tracks single quotes, double quotes, and backslash escaping so it does not accidentally rewrite legitimate filenames that merely contain the word nul, such as nul.txt or nul-backup. On any operating system other than Windows, the extension does nothing. Installation is a single command, either pulling the package from npm with pi install npm:pi-windows-nul-fix or installing directly from the GitHub source, and there is also a way to try it without installing by running it directly from npm. This is a narrowly scoped developer tool for anyone using Pi on Windows who wants AI generated shell commands to behave correctly.