Agent skill

Tmux

by bastani-inc in bastani-inc/atomic

Control tmux-compatible sessions/windows/panes for interactive CLIs: list, capture output, send keys, paste text, monitor prompts.

Custom licenceAuto-check: notes

Install Tmux

skills CLI
$ npx skills add bastani-inc/atomic --skill tmux -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install bastani-inc/atomic tmux --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/bastani-inc/atomic.git skills-src && mkdir -p .claude/skills && cp -r skills-src/packages/subagents/skills/tmux .claude/skills/tmux && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
tmux
GitHub stars
855
Token cost
~1.6k tokens
SKILL.md length
403 words
Files
3 (incl. scripts)
Skills in repo
15
Repo updated
First seen
Licence
Custom licence

At a glance

Control tmux-compatible sessions/windows/panes for interactive CLIs: list, capture output, send keys, paste text, monitor prompts.

  • SKILL.md covers Installation, Basics, Send input and Sessions, plus 4 more sections
  • Runs Shell scripts from its folder; calls make, git and cargo; reaches github.com

What it does

Tmux is an agent skill from bastani-inc/atomic. Control tmux-compatible sessions/windows/panes for interactive CLIs: list, capture output, send keys, paste text, monitor prompts.

Its SKILL.md is about 1.6k tokens, which your agent loads only when the skill is triggered. The skill folder holds 3 other files, including scripts (for example `scripts/find-sessions.sh` and `scripts/wait-for-text.sh`).

It works with tmux. The repository describes itself as: The verifiable coding agent runtime. Define your coding agent's process in natural language with stages, checks, and approval gates instead of hoping it follows your…

Example prompts

  • “/tmux”

Requirements

  • A Bash shell

What it can do on your machine

Read from SKILL.md and the folder at commit 23dbfd7. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Ships 2 files in scripts/ (Shell), which the agent can run.

    Shell commands in SKILL.md call:

    • make
    • git
    • cargo
    • brew
    • sh
    • winget
    • choco
    • rg

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Hosts in commands or code, which the agent is likely to contact:

    • github.com

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Tmux loads about 1.6k tokens when it runs. Until then it costs about 34 tokens; SKILL.md has 403 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~34
When it runs · the whole SKILL.md, loaded when a task matches
~1.6k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

  • NoteRuns commands with sudoSKILL.md:77
    sudo make install
  • NoteRuns commands with sudoSKILL.md:87
    sudo make install

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.

SKILL.md

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 403 words (~1,597 tokens).

“Use tmux for interactive terminal sessions and terminal UI verification. For ordinary commands, use bash: supported owner-bound calls can run in the background explicitly with wait: { kind: "background" } or automatically after their foreground observation budget expires. Use tmux…”

— opening of SKILL.md by bastani-inc, Custom licence
name
tmux

Read the full SKILL.md on GitHub

Files

SKILL.md and 2 other files (scripts) in packages/subagents/skills/tmux of bastani-inc/atomic.

  • SKILL.md
  • scripts/find-sessions.sh
  • scripts/wait-for-text.sh

Open the folder on GitHubat commit 23dbfd7

Compare with similar skills

Tmux next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Tmux compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Tmux this skillbastani-inc/atomic855—~1.6kAutomated safety check: NotesCustom licence
1passwordtrpc-group/trpc-agent-go1.9k14 repos~656Automated safety check: PassApache-2.0
CodeGraph Agent Evalcolbymchenry/codegraph74k—~950Automated safety check: PassMIT
Tmuxtrpc-group/trpc-agent-go1.9k23 repos~868Automated safety check: PassApache-2.0
CodexBar Live QAsteipete/CodexBar22k—~1.2kAutomated safety check: PassMIT
Tmuxopenclaw/openclaw392k1 repos~640Automated safety check: PassMIT

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Works with

Questions about Tmux

What does Tmux do?

Control tmux-compatible sessions/windows/panes for interactive CLIs: list, capture output, send keys, paste text, monitor prompts. Tmux is an agent skill from bastani-inc/atomic. Control tmux-compatible sessions/windows/panes for interactive CLIs: list, capture output, send keys, paste text, monitor prompts.

How do I install Tmux in Claude Code?

Run `npx skills add bastani-inc/atomic --skill tmux -a claude-code`. Or copy the skill folder (packages/subagents/skills/tmux in bastani-inc/atomic) into .claude/skills/tmux in your project. Claude Code loads it when a task matches its description.

How do I install Tmux in Codex?

Run `npx skills add bastani-inc/atomic --skill tmux -a codex`. Or copy the skill folder (packages/subagents/skills/tmux in bastani-inc/atomic) into .agents/skills/tmux in your project. Codex loads it when a task matches its description.

Can I use Tmux in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add bastani-inc/atomic --skill tmux -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/tmux, .gemini/skills/tmux, .github/skills/tmux and .opencode/skills/tmux in your project.

What does Tmux need to run?

Going by SKILL.md and its folder, Tmux needs a shell for the scripts in its folder and the command-line tools its instructions call (make, git, cargo, brew, sh and winget). Our summary lists: A Bash shell.

Does Tmux access the network?

SKILL.md names 1 domain. In commands or code: github.com; the agent is likely to contact it when it follows the instructions. This is read from the text; nothing was executed.

Is Tmux safe to install?

Our automated static check of SKILL.md found notes only (runs commands with sudo), nothing it rates as a warning. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does Tmux use?

Tmux has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Tmux use?

About 1.6k tokens (SKILL.md is roughly 6.4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Tmux?

Skills that share tags, products or a category with Tmux: 1password (trpc-group/trpc-agent-go, 1.9k stars), CodeGraph Agent Eval (colbymchenry/codegraph, 74k stars), Tmux (trpc-group/trpc-agent-go, 1.9k stars) and CodexBar Live QA (steipete/CodexBar, 22k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Tmux?

bastani-inc (a GitHub organization) maintains it in bastani-inc/atomic, which has 855 GitHub stars. The repository holds 15 skills in this directory. The repository was last updated on October 10, 2026.

Source: bastani-inc/atomic on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.