A plugin that helps an agent work with tmux, a terminal tool that keeps multiple command-line sessions and panels open in one window.

Use it with Node.js consoles, development servers, test watchers, debuggers, and other interactive command-line programs.

It exposes the terminal panels a developer is watching and helps operate interactive or long-running programs without losing their state.

tmux — Plugin by nicknisi

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.

Claude Code

/plugin marketplace add nicknisi/claude-plugins

agentmods

npx agentmods add plugins/nicknisi/claude-plugins/tmux

Clone the repo

git clone --depth 1 https://github.com/nicknisi/claude-plugins

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

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 2d 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.

plugins/tmux/.claude-plugin/plugin.json · 24 lines

What it actually says

{
  "name": "tmux",
  "version": "0.1.2",
  "description": "Makes Claude tmux-aware. A SessionStart hook detects when Claude runs inside tmux and surfaces the panes the user is watching, plus a skill for reading and driving interactive/long-running CLIs (Node REPL, dev servers, test watchers, the node debugger) by sending keystrokes and scraping pane output.",
  "author": {
    "name": "Nick Nisi",
    "email": "[email protected]"
  },
  "keywords": [
    "tmux",
    "terminal",
    "multiplexer",
    "session",
    "send-keys",
    "capture-pane",
    "repl",
    "node",
    "dev-server",
    "test-watcher",
    "debugger",
    "automation"
  ]
}

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.

2d ago First seen · 24 lines scan A f162066550d4

Subscribe to this mod's changes

tmux is a plugin published in the GitHub repository nicknisi/claude-plugins (114 stars, last pushed 22d ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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 2026-08-30.

Browser automation Debugging Testing

tmux

Getting it into your agent

Grade A, and why

Nothing flagged

What it actually says

What this file has done since we first saw it

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