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

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Why This Matters

MicroCodex represents a significant advancement in local AI coding agents by offering an ultra-lightweight, open-source implementation of OpenAI's Codex in C++, enabling developers to run powerful coding assistance directly on their machines without relying on cloud services. Its minimal binary size and ease of installation make it accessible for a wide range of users, potentially transforming local AI development workflows.

Key Takeaways

MicroCodex is an ultra-lightweight coding agent that runs locally in your terminal.

Quickstart

Installing and running MicroCodex

Run the following on Mac or Linux to install MicroCodex:

curl -fsSL https://github.com/paoloanzn/microcodex/releases/latest/download/install.sh | sh

Then simply run microcodex login to sign in, followed by microcodex to get started.

You can also go to the latest GitHub Release and download the appropriate binary for your platform. Each GitHub Release contains these executables: macOS Apple Silicon/arm64: microcodex-aarch64-apple-darwin.tar.gz x86_64: microcodex-x86_64-apple-darwin.tar.gz

Linux x86_64: microcodex-x86_64-unknown-linux-gnu.tar.gz arm64: microcodex-aarch64-unknown-linux-gnu.tar.gz

Each archive contains a single entry with the platform baked into the name (for example, microcodex-aarch64-apple-darwin ), so you likely want to rename it to microcodex after extracting it.

The installer selects the native build for the current architecture. Linux requires the libcurl and OpenSSL runtime libraries.

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