Resources
Posts from the project, plus the tools and docs that make it possible to build one yourself.
From the Project
Where Things Stand: v0.2.0
A second agent, a second checkbox: Codex CLI support, and what it took to get right.
Published August 17, 2026
Where Things Stand: v0.1.0
A quick, honest status update: what's built, what's tested, and what isn't there yet.
Published August 7, 2026
Why a Physical Light?
Coding agents already show their status on screen. Here's why that wasn't enough.
Published August 7, 2026
Build It
Arduino IDE
The program you'll use to flash firmware onto the board.
arduino-pico
The board package that teaches the Arduino IDE how to talk to the RP2040 chip.
Adafruit NeoPixel
The library that drives the addressable LEDs. Their timing is too precise for a plain digitalWrite.
KiCad
Free, open-source software for designing circuit boards, used to design this one.
PCB and chassis design files
The actual KiCad project for this board, the gerber files a fabrication service needs to build the PCB itself, and the chassis CAD. Start here if you want to get your own board fabricated.
RP2040 documentation
Official documentation for the microcontroller at the heart of the board.
Run It
andon-light on PyPI
The command-line tool that talks to the device, published and ready to install.
Source code on GitHub
Firmware, hardware design files, host CLI, and hook setup: all of it MIT-licensed.
Claude Code Hooks reference
Official docs for the hook events this project's integration is built on.
Codex CLI Hooks reference
Official docs for the Codex CLI hook events this project's second integration is built on.