Spider King
aoyunyang/spider-king-skill
Pure-web protocol reverse skill: turn hostile browser clients into browser-free Python collectors.
Create and manage sandboxed WASM agents for isolated code execution
MITAuto-check: notes
Install Wasm Agent
$ npx skills add ruvnet/ruflo --skill wasm-agent -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install ruvnet/ruflo wasm-agent --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/plugins/ruflo-agent/skills/wasm-agent .claude/skills/wasm-agent && 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 "wasm-agent" agent skill from https://github.com/ruvnet/ruflo/tree/main/plugins/ruflo-agent/skills/wasm-agent into .claude/skills/wasm-agent/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "wasm-agent", 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/plugins/ruflo-agent/skills/wasm-agentType 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 wasm-agent -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install ruvnet/ruflo wasm-agent --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/plugins/ruflo-agent/skills/wasm-agent .agents/skills/wasm-agent && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "wasm-agent" agent skill from https://github.com/ruvnet/ruflo/tree/main/plugins/ruflo-agent/skills/wasm-agent into .agents/skills/wasm-agent/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "wasm-agent", 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 wasm-agent -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install ruvnet/ruflo wasm-agent --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/plugins/ruflo-agent/skills/wasm-agent .cursor/skills/wasm-agent && 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 "wasm-agent" agent skill from https://github.com/ruvnet/ruflo/tree/main/plugins/ruflo-agent/skills/wasm-agent into .cursor/skills/wasm-agent/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "wasm-agent", 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 plugins/ruflo-agent/skills/wasm-agent--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 wasm-agent -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install ruvnet/ruflo wasm-agent --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/plugins/ruflo-agent/skills/wasm-agent .gemini/skills/wasm-agent && 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 "wasm-agent" agent skill from https://github.com/ruvnet/ruflo/tree/main/plugins/ruflo-agent/skills/wasm-agent into .gemini/skills/wasm-agent/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "wasm-agent", 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 wasm-agentInstalls 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 wasm-agent -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/plugins/ruflo-agent/skills/wasm-agent .github/skills/wasm-agent && 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 "wasm-agent" agent skill from https://github.com/ruvnet/ruflo/tree/main/plugins/ruflo-agent/skills/wasm-agent into .github/skills/wasm-agent/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "wasm-agent", 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 wasm-agent -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 wasm-agent --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/plugins/ruflo-agent/skills/wasm-agent .opencode/skills/wasm-agent && 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 "wasm-agent" agent skill from https://github.com/ruvnet/ruflo/tree/main/plugins/ruflo-agent/skills/wasm-agent into .opencode/skills/wasm-agent/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "wasm-agent", 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
wasm-agent- GitHub stars
- 74k
- Used in
- 1 other repo
- Token cost
- ~436 tokens
- SKILL.md length
- 141 words
- Files
- 1
- Skills in repo
- 264
- Repo updated
- First seen
- Licence
- MIT
At a glance
Create and manage sandboxed WASM agents for isolated code execution
- Works in 7 steps: Create agent — call… → Send prompt — call… → Use tools — call… → …
- SKILL.md covers When to use, Steps and Benefits
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Wasm Agent is an agent skill from ruvnet/ruflo. Create and manage sandboxed WASM agents for isolated code execution
Its SKILL.md is about 440 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 WebAssembly and Model Context Protocol. 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
- “/wasm-agent”
Requirements
- Pre-approved tools (allowed-tools): mcp__plugin_ruflo-core_ruflo__wasm_agent_create, mcp__plugin_ruflo-core_ruflo__wasm_agent_list, mcp__plugin_ruflo-core_ruflo__wasm_agent_prompt, mcp__plugin_ruflo-core_ruflo__wasm_agent_tool, mcp__plugin_ruflo-core_ruflo__wasm_agent_files, mcp__plugin_ruflo-core_ruflo__wasm_agent_export, mcp__plugin_ruflo-core_ruflo__wasm_agent_terminate, Bash
Workflow steps
7 steps, taken from the first numbered list in SKILL.md.
- Create agent — call mcpplugin_ruflo-core_ruflowasm_agent_create with agent configuration
- Send prompt — call mcpplugin_ruflo-core_ruflowasm_agent_prompt to interact with the agent
- Use tools — call mcpplugin_ruflo-core_ruflowasm_agent_tool to give the agent access to specific tools
- Manage files — call mcpplugin_ruflo-core_ruflowasm_agent_files to read/write files in the sandbox
- Export — call mcpplugin_ruflo-core_ruflowasm_agent_export to package the agent for sharing
- List agents — call mcpplugin_ruflo-core_ruflowasm_agent_list to see all running WASM agents
- Terminate — call mcpplugin_ruflo-core_ruflowasm_agent_terminate to stop an agent
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 these tools, so the agent can use them without asking each time:
mcp__plugin_ruflo-core_ruflo__wasm_agent_createmcp__plugin_ruflo-core_ruflo__wasm_agent_listmcp__plugin_ruflo-core_ruflo__wasm_agent_promptmcp__plugin_ruflo-core_ruflo__wasm_agent_toolmcp__plugin_ruflo-core_ruflo__wasm_agent_filesmcp__plugin_ruflo-core_ruflo__wasm_agent_exportmcp__plugin_ruflo-core_ruflo__wasm_agent_terminateBash
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
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.
Context cost
Wasm Agent loads about 436 tokens when it runs. Until then it costs about 20 tokens; SKILL.md has 141 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: notes
The automated check noted patterns worth knowing about, such as sudo or a known installer.
- NotePre-approves every shell command (allowed-tools: Bash)SKILL.md
allowed-tools: mcp__plugin_ruflo-core_ruflo__wasm_agent_create, mcp__plugin_ruflo-core_ruflo__wasm_agent_list, mcp_
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). 141 words, ~436 tokens.
Download SKILL.mdSave it as
.claude/skills/wasm-agent/SKILL.md (or your agent's skills folder).- name
- wasm-agent
- description
- Create and manage sandboxed WASM agents for isolated code execution
- allowed-tools
- mcp__plugin_ruflo-core_ruflo__wasm_agent_create, mcp__plugin_ruflo-core_ruflo__wasm_agent_list, mcp__plugin_ruflo-core_ruflo__wasm_agent_prompt, mcp__plugin_ruflo-core_ruflo__wasm_agent_tool, mcp__plugin_ruflo-core_ruflo__wasm_agent_files, mcp__plugin_ruflo-core_ruflo__wasm_agent_export, mcp__plugin_ruflo-core_ruflo__wasm_agent_terminate, Bash
- argument-hint
- <create|list|prompt|terminate> [options]
WASM Agent
Create sandboxed agents that run in WebAssembly for safe, isolated execution.
When to use
When you need to run untrusted code, experiment with agent configurations, or create portable agents that run anywhere WASM is supported.
Steps
- Create agent — call
mcp__plugin_ruflo-core_ruflo__wasm_agent_createwith agent configuration - Send prompt — call
mcp__plugin_ruflo-core_ruflo__wasm_agent_promptto interact with the agent - Use tools — call
mcp__plugin_ruflo-core_ruflo__wasm_agent_toolto give the agent access to specific tools - Manage files — call
mcp__plugin_ruflo-core_ruflo__wasm_agent_filesto read/write files in the sandbox - Export — call
mcp__plugin_ruflo-core_ruflo__wasm_agent_exportto package the agent for sharing - List agents — call
mcp__plugin_ruflo-core_ruflo__wasm_agent_listto see all running WASM agents - Terminate — call
mcp__plugin_ruflo-core_ruflo__wasm_agent_terminateto stop an agent
Benefits
- Full sandbox isolation — agents cannot access the host filesystem
- Portable — export and run on any WASM runtime
- Reproducible — same behavior across platforms
- Safe — no risk of system damage from agent actions
© 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 plugins/ruflo-agent/skills/wasm-agent of ruvnet/ruflo.
Open the folder on GitHubat commit 6051f67
Used in 1 other repository
We found 2 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in ruvnet/ruflo, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Wasm Agent 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 |
|---|---|---|---|---|---|---|
| Wasm Agent this skillruvnet/ruflo | 74k | 1 repos | ~436 | Automated safety check: Notes | MIT | |
| Spider Kingaoyunyang/spider-king-skill | 507 | — | ~7.3k | Automated safety check: Pass | MIT | |
| Webapp Buildersidequery/sidemantic | 129 | — | ~5.5k | Automated safety check: Pass | AGPL-3.0 | |
| Bringupjenissimo/bottleship | 132 | — | ~2.9k | Automated safety check: Pass | Apache-2.0 | |
| Playground Website DebuggingWordPress/wordpress-playground | 2k | — | ~1.9k | Automated safety check: Pass | GPL-2.0 | |
| Harnessskillsynchq/txcript | 154 | — | ~4.2k | Automated safety check: Pass | Apache-2.0 |
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Related
Works with
Questions about Wasm Agent
What does Wasm Agent do?
Create and manage sandboxed WASM agents for isolated code execution. Wasm Agent is an agent skill from ruvnet/ruflo.
How do I install Wasm Agent in Claude Code?
Run `npx skills add ruvnet/ruflo --skill wasm-agent -a claude-code`. Or copy the skill folder (plugins/ruflo-agent/skills/wasm-agent in ruvnet/ruflo) into .claude/skills/wasm-agent in your project. Claude Code loads it when a task matches its description.
How do I install Wasm Agent in Codex?
Run `npx skills add ruvnet/ruflo --skill wasm-agent -a codex`. Or copy the skill folder (plugins/ruflo-agent/skills/wasm-agent in ruvnet/ruflo) into .agents/skills/wasm-agent in your project. Codex loads it when a task matches its description.
Can I use Wasm Agent 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 wasm-agent -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/wasm-agent, .gemini/skills/wasm-agent, .github/skills/wasm-agent and .opencode/skills/wasm-agent in your project.
What does Wasm Agent need to run?
SKILL.md names no scripts, command-line tools or credentials: Wasm Agent is instructions for the agent only. Its frontmatter pre-approves these tools: mcp__plugin_ruflo-core_ruflo__wasm_agent_create, mcp__plugin_ruflo-core_ruflo__wasm_agent_list, mcp__plugin_ruflo-core_ruflo__wasm_agent_prompt, mcp__plugin_ruflo-core_ruflo__wasm_agent_tool, mcp__plugin_ruflo-core_ruflo__wasm_agent_files, mcp__plugin_ruflo-core_ruflo__wasm_agent_export, mcp__plugin_ruflo-core_ruflo__wasm_agent_terminate, Bash.
Does Wasm Agent 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 Wasm Agent safe to install?
Our automated static check of SKILL.md found notes only (pre-approves every shell command (allowed-tools: bash)), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.
What licence does Wasm Agent use?
Wasm Agent 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 Wasm Agent use?
About 436 tokens (SKILL.md is roughly 1.7k 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 Wasm Agent?
Skills that share tags, products or a category with Wasm Agent: Spider King (aoyunyang/spider-king-skill, 507 stars), Webapp Builder (sidequery/sidemantic, 129 stars), Bringup (jenissimo/bottleship, 132 stars) and Playground Website Debugging (WordPress/wordpress-playground, 2k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Wasm Agent?
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.