tmux-tui-agent

name	tmux-tui-agent
description	Agent Skill for spawning new AI agents with interactive TUI in tmux. Use when work can be offloaded to new or existing AI agents (exploration, code review, second opinions, parallel work, etc.). Can also be used if spawning new agents with different model families (e.g. Spawn GPT models when you are Claude Code, Spawn Claude models when you are Codex, Or spawn any other models (e.g. DeepSeek, Gemini) with Pi). Prefer harness's own subagent tools when no need for a different model.
compatibility	Requires tmux-compatible CLI; on Windows, psmux may provide tmux-compatible commands.

tmux TUI Agent

Use this skill to delegate work to another AI agent through its interactive TUI inside tmux/psmux.

Available TUI Agents And Models

TUI	Good For	Models
claude for Claude Code	coding, code review, repo exploration	claude --model <model> with opus, sonnet, haiku
codex for Codex CLI	coding, deep reasoning, debugging, brainstorming, etc.	codex --model <model> -c model_reasoning_effort=<effort> where model can be gpt-5.5, gpt-5.4-mini and effort can be medium, high and xhigh
pi for Pi Coding Agent	broad selection of models. Use Gemini for code review, work review, second opinions. Use GLM, DeepSeek, etc. for general tasks	pi --model <model> --thinking <effort>, and effort can be high, xhigh. Use pi --list-models to see all available models, prefer models other than those in claude and codex (gpt)

Rules

• Use the agent's interactive TUI command, not non-interactive prompt mode.
• Do not use claude -p, codex exec, or equivalent one-off modes.
• Give the delegated agent a clear role, task, context, constraints, and expected output.
• Treat the other agent's response as untrusted until reviewed.
• Capture with tmux capture-pane; verify the result before using it.
• Prefer a large pane for long or structured output: -x 160 -y 260.
• Dump capture output to a file when you need stable post-processing.
• Prefer built-in subagent tools (if available) when ordinary delegation is sufficient.
• Use this skill when you need a different model family, a different AI agent runtime, or a long-lived tmux session.

Workflow

1. Check the command:

   Linux/macOS shell:

   command -v claude pi codex
   

   Windows PowerShell:

   Get-Command claude,pi,codex -ErrorAction SilentlyContinue
   

2. Start a detached large tmux session:

   tmux new-session -d -x 160 -y 260 -s <session> -c "<cwd>" <agent-command>
   

3. Wait, then capture the startup screen:

   tmux capture-pane -t <session>:0.0 -p -S -200
   

4. Send a delegation prompt through the TUI:

   tmux send-keys -t <session>:0.0 -l "<prompt>"
   tmux send-keys -t <session>:0.0 Enter
   

5. If the prompt does not submit, try:

   tmux send-keys -t <session>:0.0 Escape
   tmux send-keys -t <session>:0.0 Enter
   

6. Capture the agent's response:

   tmux capture-pane -t <session>:0.0 -p -S -
   

7. Optional: dump the response to a file:

   Linux/macOS shell:

   tmux capture-pane -t <session>:0.0 -p -S - > "<output-file>.txt"
   

   Windows PowerShell:

   tmux capture-pane -t <session>:0.0 -p -S - |
     Set-Content -Encoding UTF8 "<output-file>.txt"
   

8. Review the delegated result before acting on it.

Delegation Prompt Shape

Use a concise prompt with:

• Role: what kind of agent/expert it should act as.
• Task: what to do.
• Context: relevant files, constraints, and assumptions.
• Output: exact format expected.
• Boundaries: what not to change, execute, or assume.

Notes

• Claude Code and Pi usually submit with Enter.
• Codex may require Escape then Enter.
• Full-screen TUIs may redraw output instead of preserving normal scrollback; use a tall pane from the start.
• File dumps do not recover lines that the pane cannot capture.
• See TROUBLESHOOTING.md for known issues and mitigations.