LLVM-libc, maintained by Google engineers Michael Jones and Tue Ly, is a modular C standard library designed for portability and reusability. The project achieves correctly rounded math functions for all rounding modes, enabling consistent results across platforms—a critical feature now being adopted by MSVC and clang for compile-time evaluation.
This article describes a metaharness design pattern for configuring portable agent systems across multiple LLM backends. The approach uses environment variables, preamble composition from markdown files, and Linux manual pages to manage skills and roles in a flexible, harness-agnostic way.