I found an open source homebrew 3DS application that can connect to a remote host via SSH and run Claude Code on it. I tested it on my own 3DS,the experience was great—it even supports voice input.

With the 3DS's dual screens, analog stick, multiple buttons (mapped to Ctrl, Alt, etc.), and voice input, using Claude Code is very smooth. I also ported the Tailscale library to the 3DS and used it in my local build, so I can use my 3DS to control my computer and run Claude Code/Codex anytime I'm in a network environment.

The repository link is: https://github.com/Fishason/DSSH

3DS is so cool.