MicroCodex - Ultra-lightweight coding agent in C++

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

MicroCodex - Ultra-lightweight coding agent in C++

MicroCodex is an ultra-lightweight coding agent that runs locally in your terminal. Written in C++23, it delivers a binary under 1MB, making it incredibly fast and resource-efficient. It offers one-shot prompts, an interactive terminal UI, local coding tools, durable conversations, and automatic context compaction. You can use it with your ChatGPT plan, and it supports Codex skills. Installation is a simple curl command on Mac or Linux. Experience a coding agent that's both powerful and minimal.

MicroCodex is an ultra-lightweight coding agent that runs locally in your terminal, written in C++23, with a binary under 1MB.

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2026-08-02