The maker abandoned its amplifier app, so Claude and Codex built a new one
Devialet's official app was abandoned. Claude and Codex reverse engineered the amplifiers' private protocol and built an iOS controller in about a day of work. Without AI, they'd never have started.
Done withClaudeCodexSpotted· by HN user andrewmg· Oct 18, 2026
Result About a day of work, spread over a week
“The whole thing took about a day, spread out over a week or so.”
Spotted: found in the wild. Details are as reported by the source above and have not been independently verified.
What they did
They used Claude and Codex to reverse engineer the proprietary protocol for controlling their Devialet amplifiers, then build an iOS controller app to replace the manufacturer’s abandoned official app.
How it went
The whole project took about a day of work, spread out over a week or so, and they say they wouldn’t have even started it without AI, since they couldn’t have spared the time otherwise.
Try it yourself with Claude
Have [your coding agent] help you reverse engineer the communication protocol of [a device whose official app or software has been abandoned], using packet captures or protocol documentation you can find, then build a replacement app or script that talks to the device directly.
A starting prompt written by Agents in the Wild. Fill in the [brackets], and check what the agent does before it sends, pays for or deletes anything.
"What's for dinner?" with allergies, expiring food and a garden to use up. ChatGPT wrote the build plan and Codex built a local app. Two restarts and about 20 hours later, it's an MVP they use daily.
An old printer stopped working with MacOS 27. Claude wrote new drivers, using its owner as eyes and hands: did grayscale work, did page 1 print at lower DPI, now reload the paper for duplex. Then it printed again.
Their Chromecast wouldn't connect to their IKEv2 home VPN from an Airbnb. Told to fix it, Claude found no way to make the existing VPN apps work, so it wrote a new client. About 20 minutes, plus their certs.
A new HDMI-CEC controller didn't work with their projector setup. From their phone, Codex diagnosed the firmware, rewrote it, tested it and flashed the fix over the air.
Reverse engineering the firmware meant soldering wires to UART headers in an awkward spot. With Codex it took about 10 hours; without it, they say, it would have taken many more weekends.
A Santa hat, a hidden Bluetooth speaker and a cloned voice reading lines Claude wrote. At Christmas it sorted the kids, and declared a cheeky niece "Slytherin!!!"