Show HN: MicroCodex Coding Agent – OpenAI/codex reimplemented in C++ <1MB binary

MicroCodex is an ultra-lightweight coding agent written in C++23 that runs locally in your terminal with a binary size under 1MB, offering features like one-shot prompts, interactive UI, local coding tools, and automatic context compaction. The project is available for macOS and Linux with easy installation via a shell script or direct binary download from GitHub releases.