LLDB lets developers customize how their types are displayed in the debugger, but today's two paths, built-in C++ or user-supplied Python - carry real costs: shipping Python formatters with a binary raises trust, security, and versioning concerns, plus some LLDB environments don't have Python. This talk introduces LLDB's new formatter bytecode: a small, stack-based, virtual machine that gives formatter authors a safe, efficient, Python-independent compilation target.