tmux

tmux is a skill for Claude Code, Codex from lirrensi/agent-sommelier. It costs 84 tokens per session (884 once invoked), scanned A, original, MIT.

A tool for controlling tmux or psmux terminal sessions, which keep command-line programs running in separate, persistent windows. It can send commands, collect output, maintain SSH sessions, and coordinate parallel work.

In plain words
What is it for?
Use it for persistent SSH connections, interactive shells and REPLs, parallel processes, and coordinating coding agents across Linux, macOS, or Windows.
Why use it?
It prevents interactive or remote processes from being lost when a terminal closes and makes several command-line tasks easier to manage together.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions Codex.

Good fit Use it for persistent SSH connections, interactive shells and REPLs, parallel processes, and coordinating coding agents across Linux, macOS, or Windows.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/lirrensi/agent-sommelier/tmux
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add lirrensi/agent-sommelier --skill tmux
Clone the repo
git clone --depth 1 https://github.com/lirrensi/agent-sommelier

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for tmux

README.md
[![agentmods](https://agentmods.dev/badge/skills/lirrensi/agent-sommelier/tmux/github.svg)](https://agentmods.dev/skills/lirrensi/agent-sommelier/tmux)
Your own site
<a href="https://agentmods.dev/skills/lirrensi/agent-sommelier/tmux"><img src="https://agentmods.dev/badge/skills/lirrensi/agent-sommelier/tmux/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for tmux

Your own site · 80×15
<a href="https://agentmods.dev/skills/lirrensi/agent-sommelier/tmux"><img src="https://agentmods.dev/badge/skills/lirrensi/agent-sommelier/tmux.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 84 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 884 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00084 $0.00884
Opus 5 $0.00042 $0.00442
Sonnet 5 $0.00017 $0.00177
Haiku 4.5 $0.00008 $0.00088

Measured 9d ago against content hash 564b13c87c12, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

tmux scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/tmux/SKILL.md · 125 lines

How it starts

The opening of the file, as written. The whole thing — 125 lines — stays where its author put it; the contents beside it link to each section on GitHub.

tmux Skill

Control tmux sessions programmatically. Send keys, capture output, run interactive processes.

Cross-platform:

  • Linux/macOS: Uses native tmux
  • Windows: Uses psmux (native Windows tmux, 95%+ syntax compatible)

Use tmux when:

  • SSH to remote servers (persistent sessions)
  • Interactive TTY needed (REPLs, shells, prompts)
  • Running multiple processes in parallel
  • Orchestrating coding agents

Don't use tmux for:

  • Simple background tasks → use bg run instead
  • One-shot commands → run directly

Helper: tmx

Primary: Python CLI tool (tmx) — installable via agent-sommelier-cli. Fallback: Shell scripts at skills/tmux/scripts/tmx.sh (bash) and tmx.ps1 (PowerShell).

Commands

Command Description
tmx install Ensure tmux/psmux is available (auto-install on Windows)
tmx create <name> [cmd] Create session, optionally run init cmd
tmx rm <name> Kill session
tmx sk <name> "<cmd>" Send keys (fire and forget)
tmx r <name> Read output (full scrollback)
tmx run <name> "<cmd>" [--timeout N] Send + wait N seconds + read output
tmx list [--json] List all sessions (rich table or JSON)
tmx manager Interactive session picker

Quick Start

tmx install
tmx create mysession
tmx run mysession "ls -la"
tmx r mysession
tmx rm mysession
tmx install
tmx create mysession
tmx run mysession "Get-ChildItem"

Pattern 1: SSH Sessions (Most Common)

# Create SSH session
tmx create server "ssh [email protected]"
tmx run server "hostname" --timeout 3
tmx sk server "mypassword"
tmx run server "tail -100 nginx/access.log" --timeout 5
tmx r server

Pattern 2: Background Process Monitoring

tmx create api "cd /app && python api.py"
tmx r api | grep -q "Listening" && echo "API is up"
tmx create db "docker run --name postgres postgres"
tmx list

Pattern 3: Interactive REPL

tmx create python "python3 -q"
tmx run python "import sys; print(sys.version)"
tmx run python "2 + 2" --timeout 3

Read the full file on GitHub · 125 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 9d ago First seen · 125 lines · 84 tokens per session scan A 564b13c87c12

Subscribe to this mod's changes

tmux is a skill published in the GitHub repository lirrensi/agent-sommelier (5 stars, last pushed 7d ago), licensed MIT. It adds 84 tokens to every session and 884 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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