Arco Unleashed — Bookworm Edition

Take your Phrozen Arco off Buster.

The factory stack is frozen at Debian Buster and Klipper v0.11, and Buster is end-of-life. This puts the printer on Debian Bookworm with Klipper v0.13 — and keeps the serial touch display, both MCUs, the chamber light, input shaper, the optional AMS and the PhrozenGo app working.

Start here Code on GitHub Releases

The documentation

Checklist

Quick Start

The whole install as things to tick off. Uses the manual's step numbers, so you can drop into the long version whenever a step needs more than a line.
The full walkthrough

Manual

Every step in full, with photographs and screenshots — plus removing the eMMC, troubleshooting and the FAQ as appendices.
Reference

What you get

Every macro, menu entry and toggle the kit adds, and why each one exists. No install walkthrough — that is what the other two are for.
Diagrams

Install flowcharts

All four paths in and out, drawn: self-flash, eMMC swap, building it yourself, and going back to stock. Rendered on GitHub.
Community reference

Hardware mods

Documented Arco modifications, service tools and experimental designs with status, source, download and compatibility notes.
Before you flash anything. Two things on a factory Arco cannot be downloaded again once the eMMC is overwritten: Phrozen’s gateway — what the display talks to — and your own calibration. The installer rescues the gateway for you while it flashes, and refuses to write if it cannot. The calibration is yours: back it up first, in Step 1 of the manual.