LangBot Core Development
langbot-app/LangBot
Covers developing the LangBot core backend and web UI: dev setup, repo layout, API auth types, adding endpoints, migrations and keeping the MCP server in step.
Agent skill for sandbox - invoke with $agent-sandbox. An agent skill from ruvnet/ruflo.
MITAuto-check passed
Install Agent Sandbox
$ npx skills add ruvnet/ruflo --skill agent-sandbox -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install ruvnet/ruflo agent-sandbox --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/ruvnet/ruflo.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/agent-sandbox .claude/skills/agent-sandbox && 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 "agent-sandbox" agent skill from https://github.com/ruvnet/ruflo/tree/main/.agents/skills/agent-sandbox into .claude/skills/agent-sandbox/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "agent-sandbox", 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/ruvnet/ruflo/tree/main/.agents/skills/agent-sandboxType 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 ruvnet/ruflo --skill agent-sandbox -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install ruvnet/ruflo agent-sandbox --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ruvnet/ruflo.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/agent-sandbox .agents/skills/agent-sandbox && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "agent-sandbox" agent skill from https://github.com/ruvnet/ruflo/tree/main/.agents/skills/agent-sandbox into .agents/skills/agent-sandbox/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "agent-sandbox", 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 ruvnet/ruflo --skill agent-sandbox -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install ruvnet/ruflo agent-sandbox --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ruvnet/ruflo.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/agent-sandbox .cursor/skills/agent-sandbox && 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 "agent-sandbox" agent skill from https://github.com/ruvnet/ruflo/tree/main/.agents/skills/agent-sandbox into .cursor/skills/agent-sandbox/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "agent-sandbox", 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/ruvnet/ruflo.git --path .agents/skills/agent-sandbox--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 ruvnet/ruflo --skill agent-sandbox -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install ruvnet/ruflo agent-sandbox --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ruvnet/ruflo.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/agent-sandbox .gemini/skills/agent-sandbox && 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 "agent-sandbox" agent skill from https://github.com/ruvnet/ruflo/tree/main/.agents/skills/agent-sandbox into .gemini/skills/agent-sandbox/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "agent-sandbox", 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 ruvnet/ruflo agent-sandboxInstalls 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 ruvnet/ruflo --skill agent-sandbox -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/ruvnet/ruflo.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/agent-sandbox .github/skills/agent-sandbox && 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 "agent-sandbox" agent skill from https://github.com/ruvnet/ruflo/tree/main/.agents/skills/agent-sandbox into .github/skills/agent-sandbox/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "agent-sandbox", 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 ruvnet/ruflo --skill agent-sandbox -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install ruvnet/ruflo agent-sandbox --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ruvnet/ruflo.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/agent-sandbox .opencode/skills/agent-sandbox && 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 "agent-sandbox" agent skill from https://github.com/ruvnet/ruflo/tree/main/.agents/skills/agent-sandbox into .opencode/skills/agent-sandbox/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "agent-sandbox", 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
agent-sandbox- GitHub stars
- 74k
- Used in
- 3 other repos
- Token cost
- ~777 tokens
- SKILL.md length
- 267 words
- Files
- 1
- Skills in repo
- 264
- Repo updated
- First seen
- Licence
- MIT
At a glance
Agent skill for sandbox - invoke with $agent-sandbox. An agent skill from ruvnet/ruflo.
- Works in 6 steps: Analyze Requirements: Understand the… → Select Template: Choose the appropriate… → Configure Environment: Set up… → …
- Needs API_KEY
What it does
Agent Sandbox is an agent skill from ruvnet/ruflo. Agent skill for sandbox - invoke with $agent-sandbox
Its SKILL.md is about 780 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It works with Python and React. The repository describes itself as: 🌊 The original agent harness. Deploy intelligent multi-player swarms, coordinate autonomous workflows, and build conversational AI systems. Features adaptive memory…. The licence is MIT.
Example prompts
- “/agent-sandbox”
Requirements
- Python 3
- Node.js
- A credential in API_KEY
Workflow steps
6 steps, taken from the first numbered list in SKILL.md.
- Analyze Requirements: Understand the development environment needs and constraints
- Select Template: Choose the appropriate template (Node.js, Python, React, etc.)
- Configure Environment: Set up environment variables, packages, and startup scripts
- Execute Workflows: Run code, tests, and development tasks in the sandbox
- Monitor Performance: Track resource usage and execution metrics
- Cleanup Resources: Properly terminate sandboxes when no longer needed
What it can do on your machine
Read from SKILL.md and the folder at commit 6051f67. 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
No scripts in the folder and no shell commands in SKILL.md (its code samples are javascript).
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 these keys or tokens, usually read from environment variables:
API_KEY
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Agent Sandbox loads about 777 tokens when it runs. Until then it costs about 17 tokens; SKILL.md has 267 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); files beside SKILL.md are not scanned.
SKILL.md
The full file from ruvnet/ruflo at commit 6051f67, republished under its MIT licence (© ruvnet). 267 words, ~777 tokens.
Download SKILL.mdSave it as
.claude/skills/agent-sandbox/SKILL.md (or your agent's skills folder).- name
- agent-sandbox
- description
- Agent skill for sandbox - invoke with $agent-sandbox
name: flow-nexus-sandbox description: E2B sandbox deployment and management specialist. Creates, configures, and manages isolated execution environments for code development and testing. color: green
You are a Flow Nexus Sandbox Agent, an expert in managing isolated execution environments using E2B sandboxes. Your expertise lies in creating secure, scalable development environments and orchestrating code execution workflows.
Your core responsibilities:
- Create and configure E2B sandboxes with appropriate templates and environments
- Execute code safely in isolated environments with proper resource management
- Manage sandbox lifecycles from creation to termination
- Handle file uploads, downloads, and environment configuration
- Monitor sandbox performance and resource utilization
- Troubleshoot execution issues and environment problems
Your sandbox toolkit:
// Create Sandbox
mcp__flow-nexus__sandbox_create({
template: "node", // node, python, react, nextjs, vanilla, base
name: "dev-environment",
env_vars: {
API_KEY: "key",
NODE_ENV: "development"
},
install_packages: ["express", "lodash"],
timeout: 3600
})
// Execute Code
mcp__flow-nexus__sandbox_execute({
sandbox_id: "sandbox_id",
code: "console.log('Hello World');",
language: "javascript",
capture_output: true
})
// File Management
mcp__flow-nexus__sandbox_upload({
sandbox_id: "id",
file_path: "$app$config.json",
content: JSON.stringify(config)
})
// Sandbox Management
mcp__flow-nexus__sandbox_status({ sandbox_id: "id" })
mcp__flow-nexus__sandbox_stop({ sandbox_id: "id" })
mcp__flow-nexus__sandbox_delete({ sandbox_id: "id" })Your deployment approach:
- Analyze Requirements: Understand the development environment needs and constraints
- Select Template: Choose the appropriate template (Node.js, Python, React, etc.)
- Configure Environment: Set up environment variables, packages, and startup scripts
- Execute Workflows: Run code, tests, and development tasks in the sandbox
- Monitor Performance: Track resource usage and execution metrics
- Cleanup Resources: Properly terminate sandboxes when no longer needed
Sandbox templates you manage:
- node: Node.js development with npm ecosystem
- python: Python 3.x with pip package management
- react: React development with build tools
- nextjs: Full-stack Next.js applications
- vanilla: Basic HTML/CSS/JS environment
- base: Minimal Linux environment for custom setups
Quality standards:
- Always use appropriate resource limits and timeouts
- Implement proper error handling and logging
- Secure environment variable management
- Efficient resource cleanup and lifecycle management
- Clear execution logging and debugging support
- Scalable sandbox orchestration for multiple environments
When managing sandboxes, always consider security isolation, resource efficiency, and clear execution workflows that support rapid development and testing cycles.
© ruvnet, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in .agents/skills/agent-sandbox of ruvnet/ruflo.
Open the folder on GitHubat commit 6051f67
Used in 3 other repositories
We found 4 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 3 other GitHub owners. This page covers the copy in ruvnet/ruflo, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Agent Sandbox 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 |
|---|---|---|---|---|---|---|
| Agent Sandbox this skillruvnet/ruflo | 74k | 3 repos | ~777 | Automated safety check: Pass | MIT | |
| LangBot Core Developmentlangbot-app/LangBot | 18k | — | ~1.4k | Automated safety check: Notes | Apache-2.0 | |
| Technology Searchfreestylefly/wesight | 943 | — | ~3.3k | Automated safety check: Pass | MIT | |
| Renderdoc GPU Debugrudybear/renderdoc-skill | 211 | — | ~4k | Automated safety check: Pass | MIT | |
| Tidyfactor StylerTidyFactor/Styler | 118 | — | ~1.7k | Automated safety check: Pass | Apache-2.0 | |
| Code Review SkillRain-kl/OpenFlare | 288 | — | ~2.3k | Automated safety check: Notes | MIT |
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Related
Questions about Agent Sandbox
What does Agent Sandbox do?
Agent skill for sandbox - invoke with $agent-sandbox. An agent skill from ruvnet/ruflo. Agent Sandbox is an agent skill from ruvnet/ruflo.
How do I install Agent Sandbox in Claude Code?
Run `npx skills add ruvnet/ruflo --skill agent-sandbox -a claude-code`. Or copy the skill folder (.agents/skills/agent-sandbox in ruvnet/ruflo) into .claude/skills/agent-sandbox in your project. Claude Code loads it when a task matches its description.
How do I install Agent Sandbox in Codex?
Run `npx skills add ruvnet/ruflo --skill agent-sandbox -a codex`. Or copy the skill folder (.agents/skills/agent-sandbox in ruvnet/ruflo) into .agents/skills/agent-sandbox in your project. Codex loads it when a task matches its description.
Can I use Agent Sandbox 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 ruvnet/ruflo --skill agent-sandbox -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/agent-sandbox, .gemini/skills/agent-sandbox, .github/skills/agent-sandbox and .opencode/skills/agent-sandbox in your project.
What does Agent Sandbox need to run?
Going by SKILL.md and its folder, Agent Sandbox needs credentials named API_KEY. Our summary lists: Python 3; Node.js; A credential in API_KEY.
Does Agent Sandbox 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 Agent Sandbox 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. Review the folder before installing.
What licence does Agent Sandbox use?
Agent Sandbox 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 Agent Sandbox use?
About 777 tokens (SKILL.md is roughly 3.1k 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 Agent Sandbox?
Skills that share tags, products or a category with Agent Sandbox: LangBot Core Development (langbot-app/LangBot, 18k stars), Technology Search (freestylefly/wesight, 943 stars), Renderdoc GPU Debug (rudybear/renderdoc-skill, 211 stars) and Tidyfactor Styler (TidyFactor/Styler, 118 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Agent Sandbox?
ruvnet (a GitHub user) maintains it in ruvnet/ruflo, which has 74,089 GitHub stars. The repository holds 264 skills in this directory. The repository was last updated on October 8, 2026.
Source: ruvnet/ruflo on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.