Is the CodeAct skill free?

Yes. The skill itself is free from gradion-ai/ipybox. SkillProof publishes the install command and an independent test verdict at no cost.

How do I install CodeAct?

Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.

Can I use CodeAct with Cursor, Copilot, Gemini CLI, Codex or other AI tools?

The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.

CodeAct

Executes Python via the ipybox MCP server for code-mode tool calling — requires the full ipybox plugin bundle.

by gradion-ai · gradion-ai/ipybox

Tested · Didn't pass

Read why it failed Download source ↗

Test report

Verdict: Tested · Didn't pass
Tested: Jul 14, 2026
Environment: Claude Code 2.x (agent harness)
Upstream re-checked: Aug 10, 2026 · e1b1d29

The skill only functions bundled with its own ipybox MCP server and a project's gentools/mcptools folders; without those (the default state for any other Claude install) it can't execute anything, while a plain Python one-liner solved the same task instantly.

Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works

Installs cleanly 4/5
Triggers reliably 5/5
Output vs. baseline 2/10
Docs & honesty 3/5

What CodeAct does

Generates and executes Python code through the ipybox MCP server's execute_ipython_cell tool, chaining reusable tools sourced from a project's gentools/ and mcptools/ packages and optionally saving new code actions as reusable tools. Triggers only on explicit requests to 'use the codeact skill' or similar phrasing, by design. It ships as part of the ipybox Claude Code plugin and does nothing on its own without that MCP server running and the project-specific tool directories in place.

How to install CodeAct

git clone https://github.com/gradion-ai/ipybox
cd ipybox
mkdir -p ~/.claude/skills
cp -r plugin/skills/codeact ~/.claude/skills/codeact

Skills live in ~/.claude/skills/ (global) or .claude/skills/ (per-project). Restart Claude Code after installing.

Commands — how to trigger CodeAct

/codeact Executes Python via the ipybox MCP server for code-mode tool calling — requires the full ipybox plugin bundle.

It also activates on plain-language prompts like these:

Write and execute Python code to compute the sum of squares to 10.
Run this data transformation through your code execution environment.
Execute a quick Python calculation and show me the actual result.

Frequently asked questions

Is the CodeAct skill free?: Yes. The skill itself is free from gradion-ai/ipybox. SkillProof publishes the install command and an independent test verdict at no cost.
Does CodeAct work with Claude Code?: We tested it with Claude Code 2.x (agent harness) on Jul 14, 2026. Verdict: Tested · Didn't pass. The skill only functions bundled with its own ipybox MCP server and a project's gentools/mcptools folders; without those (the default state for any other Claude install) it can't execute anything, while a plain Python one-liner solved the same task instantly.
How do I install CodeAct?: Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
Can I use CodeAct with Cursor, Copilot, Gemini CLI, Codex or other AI tools?: The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.