Run multiple Claude Code and Codex agents in parallel

Each agent runs its own installs, builds and tests, so three agents on a laptop share one CPU and one battery with your editor. On a box, each agent gets its own git worktree and tmux session, and they keep working with the lid closed.

11. Add a worktree per task

prized ssh

Then, on the box:

cd ~/code/myproject
git worktree add ../myproject-auth -b auth
git worktree add ../myproject-billing -b billing

Each worktree is its own folder and branch with tracked files only, so install dependencies in it. Worktrees beside the project stay on the box; only ~/code/myproject syncs to your laptop (Sync).

22. Start an agent in each

prized agents run claude --session claude-auth --dir code/myproject-auth
prized agents run codex --session codex-billing --dir code/myproject-billing

--dir is relative to your home on the box. Attach with prized ssh -s claude-auth to give an agent its task, and detach with Ctrl-b, then d; to skip attaching, hand it the task with prized prompt. Give each dev server its own port, such as 3001 and 3002 (Ports).

33. Watch them

prized ssh --ls lists the sessions. For one view of every agent, prized herdr opens herdr, which shows each agent started in its tabs as working, blocked, idle or done, and notifies you when one needs you.

44. Review and merge

git diff
git add -A
git commit -m "Add rate limiting to the login endpoint"
git push -u origin auth

gh on the box is signed in if it was on your laptop at setup, so gh pr create works there. Once merged, git worktree remove ../myproject-auth cleans up.

A box per agent

Separate boxes keep one agent's build from slowing another, and each box pauses on its own; this needs a plan, since the free credit runs one box at a time. Fork the box you set up (here mango), project and tools included, then connect the copy and start its agent:

prized fork mango --name mango-2 --wait
prized init --box mango-2
prized --box mango-2 agents run claude --dir code/myproject

A fork takes minutes; to start many boxes from one point, save a template. Give each box's dev server its own port, since the same port on two boxes collides on your laptop (Several boxes).

What it costs

For the same total CPU and memory, several Smalls cost less per hour awake than one bigger box:

An eight hour day of four agents is $4.38 on four Smalls, or $5.48 on one Large. On the $30 of free credit, one Small runs your agents side by side at $0.137 an hour, about nine days around the clock (Billing).