1password
trpc-group/trpc-agent-go
Set up and use 1Password CLI (op). An agent skill from trpc-group/trpc-agent-go.
Manage persistent tmux terminal sessions: create, read, write to, list, and close named shell sessions.
MITAuto-check passed
Install Vellum Terminal Sessions
$ npx skills add vellum-ai/vellum-assistant --skill vellum-terminal-sessions -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install vellum-ai/vellum-assistant vellum-terminal-sessions --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/vellum-ai/vellum-assistant.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/vellum-terminal-sessions .claude/skills/vellum-terminal-sessions && rm -rf skills-srcUse ~/.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/
Install the "vellum-terminal-sessions" agent skill from https://github.com/vellum-ai/vellum-assistant/tree/main/skills/vellum-terminal-sessions into .claude/skills/vellum-terminal-sessions/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "vellum-terminal-sessions", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/vellum-ai/vellum-assistant/tree/main/skills/vellum-terminal-sessionsType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add vellum-ai/vellum-assistant --skill vellum-terminal-sessions -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install vellum-ai/vellum-assistant vellum-terminal-sessions --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/vellum-ai/vellum-assistant.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/vellum-terminal-sessions .agents/skills/vellum-terminal-sessions && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "vellum-terminal-sessions" agent skill from https://github.com/vellum-ai/vellum-assistant/tree/main/skills/vellum-terminal-sessions into .agents/skills/vellum-terminal-sessions/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "vellum-terminal-sessions", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add vellum-ai/vellum-assistant --skill vellum-terminal-sessions -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install vellum-ai/vellum-assistant vellum-terminal-sessions --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/vellum-ai/vellum-assistant.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/vellum-terminal-sessions .cursor/skills/vellum-terminal-sessions && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "vellum-terminal-sessions" agent skill from https://github.com/vellum-ai/vellum-assistant/tree/main/skills/vellum-terminal-sessions into .cursor/skills/vellum-terminal-sessions/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "vellum-terminal-sessions", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/vellum-ai/vellum-assistant.git --path skills/vellum-terminal-sessions--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add vellum-ai/vellum-assistant --skill vellum-terminal-sessions -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install vellum-ai/vellum-assistant vellum-terminal-sessions --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/vellum-ai/vellum-assistant.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/vellum-terminal-sessions .gemini/skills/vellum-terminal-sessions && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "vellum-terminal-sessions" agent skill from https://github.com/vellum-ai/vellum-assistant/tree/main/skills/vellum-terminal-sessions into .gemini/skills/vellum-terminal-sessions/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "vellum-terminal-sessions", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install vellum-ai/vellum-assistant vellum-terminal-sessionsInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add vellum-ai/vellum-assistant --skill vellum-terminal-sessions -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/vellum-ai/vellum-assistant.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/vellum-terminal-sessions .github/skills/vellum-terminal-sessions && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "vellum-terminal-sessions" agent skill from https://github.com/vellum-ai/vellum-assistant/tree/main/skills/vellum-terminal-sessions into .github/skills/vellum-terminal-sessions/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "vellum-terminal-sessions", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add vellum-ai/vellum-assistant --skill vellum-terminal-sessions -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install vellum-ai/vellum-assistant vellum-terminal-sessions --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/vellum-ai/vellum-assistant.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/vellum-terminal-sessions .opencode/skills/vellum-terminal-sessions && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "vellum-terminal-sessions" agent skill from https://github.com/vellum-ai/vellum-assistant/tree/main/skills/vellum-terminal-sessions into .opencode/skills/vellum-terminal-sessions/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "vellum-terminal-sessions", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
vellum-terminal-sessions- GitHub stars
- 1.4k
- Token cost
- ~704 tokens
- SKILL.md length
- 144 words
- Files
- 6 (incl. scripts, references)
- Skills in repo
- 108
- Repo updated
- First seen
- Licence
- MIT
At a glance
Manage persistent tmux terminal sessions: create, read, write to, list, and close named shell sessions.
- SKILL.md covers Overview, Prerequisites and Workflow: Orchestrating…
- Runs Shell scripts from its folder
What it does
Vellum Terminal Sessions is an agent skill from vellum-ai/vellum-assistant. Manage persistent tmux terminal sessions: create, read, write to, list, and close named shell sessions. For Claude Code or Codex, use the ACP skill instead.
Its SKILL.md is about 700 tokens, which your agent loads only when the skill is triggered. The skill folder holds 7 other files, including scripts and reference files (for example `references/host-sessions.md`, `references/sandbox-sessions.md` and `references/tmux-best-practices.md`). Compatibility notes: Sandbox mode works without any host dependencies. Host mode requires tmux installed on the user's machine. Works on macOS and Linux.
It works with tmux. The repository describes itself as: An AI Assistant that’s easy to setup, does your work 24/7, knows your preferences and gets better over time. The licence is MIT.
Example prompts
- “/vellum-terminal-sessions”
Requirements
- A Bash shell
- Compatibility (from SKILL.md): Sandbox mode works without any host dependencies. Host mode requires tmux installed on the user's machine. Works on macOS and Linux.
What it can do on your machine
Read from SKILL.md and the folder at commit 33cc983. 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.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
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.
Compatibility
Sandbox mode works without any host dependencies. Host mode requires tmux installed on the user's machine. Works on macOS and Linux.
From compatibility in the SKILL.md frontmatter.
Context cost
Vellum Terminal Sessions loads about 704 tokens when it runs, and up to ~3.3k if it reads all its reference files. Until then it costs about 45 tokens; SKILL.md has 144 words of instructions outside code blocks.
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 passed
The automated check found no risky patterns in SKILL.md.
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
The full file from vellum-ai/vellum-assistant at commit 33cc983, republished under its MIT licence (© vellum-ai). 144 words, ~704 tokens.
Download SKILL.mdSave it as
.claude/skills/vellum-terminal-sessions/SKILL.md (or your agent's skills folder). This skill also uses 5 other files; get the full folder from GitHub.- name
- vellum-terminal-sessions
- description
- Manage persistent tmux terminal sessions: create, read, write to, list, and close named shell sessions. For Claude Code or Codex, use the ACP skill instead.
- compatibility
- Sandbox mode works without any host dependencies. Host mode requires tmux installed on the user's machine. Works on macOS and Linux.
- metadata.emoji
- 🖥️
- metadata.author
- vellum-ai
- metadata.version
- 0.2
Overview
This skill manages persistent terminal sessions via tmux. Two modes:
| Sandbox Mode | Host Mode | |
|---|---|---|
| Where tmux runs | In the assistant's sandbox | On the user's host machine |
| How user connects | vellum terminal attach <session-name> | User opens their own terminal |
| Assistant access | Direct (bash tool) | Via host_bash |
| Best for | Long-running builds, servers, always-on tasks | Work needing host access (e.g. SwiftUI builds, host-local services) |
Default: Use Sandbox Mode unless the task specifically requires host access. Details: sandbox-sessions.md · host-sessions.md · tmux-best-practices.md
Prerequisites
Sandbox Mode: No setup needed — tmux is available in the sandbox.
Host Mode: Requires tmux on the host — see host-sessions.md.
Workflow: Orchestrating Multiple Sessions
- List all sessions:
tmux list-sessionsto get names and current commands - Read each:
tmux capture-pane -t NAME -p -S -50(30-50 lines is usually enough) - Summarize before acting: "Build done, tests at 73%, deploy waiting for confirmation"
- Act on the user's instructions
© vellum-ai, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 5 other files (scripts, references) in skills/vellum-terminal-sessions of vellum-ai/vellum-assistant.
- SKILL.md
- references/host-sessions.md
- references/sandbox-sessions.md
- references/tmux-best-practices.md
- scripts/setup-auto-tmux.sh
- scripts/tt
Open the folder on GitHubat commit 33cc983
Compare with similar skills
Vellum Terminal Sessions 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Vellum Terminal Sessions this skillvellum-ai/vellum-assistant | 1.4k | — | ~704 | Automated safety check: Pass | MIT | |
| 1passwordtrpc-group/trpc-agent-go | 1.9k | 14 repos | ~656 | Automated safety check: Pass | Apache-2.0 | |
| CodeGraph Agent Evalcolbymchenry/codegraph | 74k | — | ~950 | Automated safety check: Pass | MIT | |
| Tmuxtrpc-group/trpc-agent-go | 1.9k | 23 repos | ~868 | Automated safety check: Pass | Apache-2.0 | |
| CodexBar Live QAsteipete/CodexBar | 22k | — | ~1.2k | Automated safety check: Pass | MIT | |
| Tmuxopenclaw/openclaw | 392k | 1 repos | ~640 | Automated safety check: Pass | MIT |
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Remote-control tmux sessions for interactive CLIs by sending keystrokes and scraping pane output.
CodexBar Live QA
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Runs live QA for the CodexBar app: provider usage matrix checks through its packaged CLI, config validation and menu checks, with 1Password-backed credentials handled safely.
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openclaw/openclaw
Control tmux sessions/panes for interactive CLIs: list, capture output, send keys, paste text, monitor prompts.
Agent Feature Reproduction
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Reproduces a feature from Codex or Claude Code in Qwen Code by running the reference agent under capture, reading the traces, then implementing matching behavior.
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Questions about Vellum Terminal Sessions
What does Vellum Terminal Sessions do?
Manage persistent tmux terminal sessions: create, read, write to, list, and close named shell sessions. Vellum Terminal Sessions is an agent skill from vellum-ai/vellum-assistant. Manage persistent tmux terminal sessions: create, read, write to, list, and close named shell sessions.
How do I install Vellum Terminal Sessions in Claude Code?
Run `npx skills add vellum-ai/vellum-assistant --skill vellum-terminal-sessions -a claude-code`. Or copy the skill folder (skills/vellum-terminal-sessions in vellum-ai/vellum-assistant) into .claude/skills/vellum-terminal-sessions in your project. Claude Code loads it when a task matches its description.
How do I install Vellum Terminal Sessions in Codex?
Run `npx skills add vellum-ai/vellum-assistant --skill vellum-terminal-sessions -a codex`. Or copy the skill folder (skills/vellum-terminal-sessions in vellum-ai/vellum-assistant) into .agents/skills/vellum-terminal-sessions in your project. Codex loads it when a task matches its description.
Can I use Vellum Terminal Sessions 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 vellum-ai/vellum-assistant --skill vellum-terminal-sessions -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/vellum-terminal-sessions, .gemini/skills/vellum-terminal-sessions, .github/skills/vellum-terminal-sessions and .opencode/skills/vellum-terminal-sessions in your project.
What does Vellum Terminal Sessions need to run?
Going by SKILL.md and its folder, Vellum Terminal Sessions needs a shell for the scripts in its folder. Our summary lists: A Bash shell. Compatibility (from SKILL.md): Sandbox mode works without any host dependencies. Host mode requires tmux installed on the user's machine. Works on macOS and Linux..
Does Vellum Terminal Sessions access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Vellum Terminal Sessions safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. 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 Vellum Terminal Sessions use?
Vellum Terminal Sessions is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Vellum Terminal Sessions use?
About 704 tokens (SKILL.md is roughly 2.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 2.6k tokens, read only when the agent opens those files.
What are the alternatives to Vellum Terminal Sessions?
Skills that share tags, products or a category with Vellum Terminal Sessions: 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 Vellum Terminal Sessions?
vellum-ai (a GitHub organization) maintains it in vellum-ai/vellum-assistant, which has 1,408 GitHub stars. The repository holds 108 skills in this directory. The repository was last updated on October 9, 2026.
Source: vellum-ai/vellum-assistant on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.