The short answer: run Claude Code on a remote server instead of your laptop. Use a managed hosting service like host4.ai (30-second setup, from $5/month) or set up your own VPS with tmux. Either way, your AI agent keeps working even when your laptop is closed, your Wi-Fi drops, or you go to sleep.
The reason Claude Code dies is simple — it runs as a terminal process on your local machine. Close the terminal, close the agent. A remote server solves this permanently because it never shuts down. Below is exactly how to set it up, with three different methods compared.
Why local Claude Code sessions keep dying
Claude Code runs as a CLI process. When you close your terminal window, shut your laptop, or lose your SSH connection, the process terminates immediately. If Claude was in the middle of refactoring 20 files — all progress and context is lost.
Common scenarios: you give Claude a big task and go to lunch (session dropped), your Wi-Fi blips for 30 seconds (SSH disconnects), you want to check progress from your phone (no way to connect), your laptop sleeps at night (hours of work wasted).
Method 1: managed hosting (fastest)
Sign up at host4.ai, get a ready-to-use Ubuntu environment with Claude Code pre-installed. Open the browser terminal, run claude login, and start working. Close the tab whenever you want — your session persists. Check progress from your phone. Everything Claude builds is live on your domain instantly.
Method 2: DIY with tmux on a VPS
Rent a VPS ($12-24/month), install Ubuntu, Node.js, and Claude Code yourself. Use tmux to keep sessions alive. More control, but hours of setup and you handle security, updates, and backups yourself.
Method 3: GNU Screen
Same concept as tmux but older. Pre-installed on many systems. Works, but less intuitive interface and fewer features.
Which method to choose
If you want to start coding in 30 seconds: managed hosting. If you enjoy server administration: DIY VPS. The cost is comparable — the difference is whether you spend time building your project or configuring your server.