I turned my unused Kindle into a photo frame with GPT-6 Astra

TL;DR Highlight

Giving a coding agent a feedback loop turned an unused Kindle into a photo frame

Who Should Read

A developer using coding agents on real hardware who is tired of manually relaying logs and screenshots during debugging

Core Mechanics

Results differed by model
- GPT-5.6 Sol (Extra High) couldn't fix an error that stopped it from storing data on the Kindle.
- Fable 5.1 and Opus 5.5 were blocked by Anthropic's cybersecurity safeguards after two prompts.
- GPT-6 Astra (High) managed the jailbreak.
Built on an existing jailbreak
- They adapted the SpiderCat jailbreak as a reference.
- They built their own tool, KindleCTL, to send commands, transfer files and investigate errors.
The feedback loop was the turning point
- The agent kept asking for phone photos of the screen, which got tedious.
- The author had it set up a persistent diagnostic connection to read logs itself.
- Remote screen captures were added later so it could fix and test without help.
Tests passed but the display ghosted
- Automated checks passed on the Mac.
- On the Kindle, traces of the previous image stayed on screen.

Community Reactions

Jailbreak wasn't new, some noted
- Commenters pointed out the article reused an existing jailbreak, so the solution didn't originate from Astra.
- They said most of the real work was the slideshow and the feedback loop.
Other models did it too
- One person said they did a similar project with Claude Code (Opus 4.8) after a few attempts.
- Another said they did the same thing a month ago with Opus 4.8.
- One commenter said GPT-6 models refuse compiler and hacky work for them, so they were surprised it went through.
Complaints about security refusals
- One opinion said Anthropic loses customers by refusing problems other models solve.
- One person said Opus 5.5 wouldn't answer a low-level kernel question unrelated to security.
Experiences modding other devices with agents
- One person flashed OpenWrt on a router using Codex.
- Another built Lineage ROMs for 3 unsupported devices with Opus 5.5.

How to Apply

Give your agent log access first
- Today, add log collection and screen capture to your first prompt for any hardware or external-device task.
- Stop relaying screenshots by hand.
Add a real-world check after tests pass
- List what automated tests can't catch for UI or device work.
- Verify rendering issues like ghosting on the actual device.
Switch models quickly when stuck
- If the same error blocks you two or three times, rerun the same prompt with another model or reasoning effort.
- Give existing open-source code as reference and state it's for personal use.

Try It

copy & run

# Paste as the first prompt into a coding agent like Claude Code or Codex (the article's method turned into a prompt)

I want to use my {{device name}} for personal purposes. I own this device.
Goal: {{app or feature to build}}
Reference: {{existing open-source project link}}

Before starting, build a feedback loop first.
1. Set up a diagnostic connection so you can read the device's logs yourself.
2. Set up a way to capture the device screen remotely.
3. Make it possible to fix and test repeatedly without me pasting photos or logs.

Then start with a small test. Tell me when {{small goal, e.g. show one image}} works.
Ask me to check any physical issues that automated tests can't catch.

Next to try: describe something that looks wrong on the device even though tests pass, and have the agent investigate using logs and captures.

Terminology

JailbreakRemoving manufacturer restrictions so you can run your own software on a device. It's like making your own key to a locked house.

Feedback loopA cycle where the agent sees results and fixes things itself. It's like a cook tasting a dish and adjusting the seasoning.

Reasoning effortA setting for how long the model thinks before answering. It comes in levels like Extra High and High.

E-ink ghostingWhen an e-ink screen doesn't fully erase the previous image and it faintly remains. It's like marks left on a poorly wiped chalkboard.