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Agent skill

Skill Editor

by stacklok in stacklok/toolhive-studio

REQUIRED for editing any skill file. An agent skill from stacklok/toolhive-studio.

Apache-2.0Auto-check passedAgent Workflows

Install Skill Editor

skills CLI
$ npx skills add stacklok/toolhive-studio --skill skill-editor -a claude-code

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

GitHub CLI
$ gh skill install stacklok/toolhive-studio skill-editor --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/stacklok/toolhive-studio.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.codex/skills/skill-editor .claude/skills/skill-editor && 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
skill-editor
GitHub stars
170
Token cost
~408 tokens
SKILL.md length
126 words
Files
1
Skills in repo
9
Repo updated
First seen
Licence
Apache-2.0

At a glance

REQUIRED for editing any skill file. An agent skill from stacklok/toolhive-studio.

  • Works in 3 steps: Always edit Claude first -… → Replicate with CLI - Copy changes to… → Never edit Codex/Cursor directly - They…
  • Tasks that involve MCP servers
  • SKILL.md covers Workflow, Finding Existing Skills, Editing a Skill and Verification, plus 2 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Skill Editor is an agent skill from stacklok/toolhive-studio. REQUIRED for editing any skill file. Ensures changes sync to Claude, Codex, and Cursor. Never edit .claude/skills/ files directly - always use this skill.

Its SKILL.md is about 410 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Agent Workflows, covering MCP servers. It works with Model Context Protocol. The repository describes itself as: ToolHive is an application that allows you to install, manage and run MCP servers and connect them to AI agents. The licence is Apache-2.0.

When your agent uses it

  • Tasks that involve MCP servers

Example prompts

  • “/skill-editor”

Workflow steps

3 steps, taken from the first numbered list in SKILL.md.

  1. Always edit Claude first - .claude/skills//SKILL.md is the canonical source
  2. Replicate with CLI - Copy changes to .codex/skills/ and .cursor/skills/
  3. Never edit Codex/Cursor directly - They are copies of Claude's version

What it can do on your machine

Read from SKILL.md and the folder at commit fc76b24. 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 bash).

    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

Skill Editor loads about 408 tokens when it runs. Until then it costs about 42 tokens; SKILL.md has 126 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~42
When it runs · the whole SKILL.md, loaded when a task matches
~408

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 stacklok/toolhive-studio at commit fc76b24, republished under its Apache-2.0 licence (© stacklok). 126 words, ~408 tokens.

Download SKILL.mdSave it as .claude/skills/skill-editor/SKILL.md (or your agent's skills folder).
name
skill-editor
description
REQUIRED for editing any skill file. Ensures changes sync to Claude, Codex, and Cursor. Never edit .claude/skills/ files directly - always use this skill.

Skill Editor

Edit existing AI agent skills while keeping Claude, Codex, and Cursor in sync.

Workflow

  1. Always edit Claude first - .claude/skills/<name>/SKILL.md is the canonical source
  2. Replicate with CLI - Copy changes to .codex/skills/ and .cursor/skills/
  3. Never edit Codex/Cursor directly - They are copies of Claude's version

Finding Existing Skills

List all skills:

bash
ls -la .claude/skills/

Read a skill:

bash
cat .claude/skills/<name>/SKILL.md

Editing a Skill

  1. Read the current skill content from .claude/skills/<name>/SKILL.md
  2. Make the requested changes
  3. Replicate to other agents:
    bash
    cp .claude/skills/<name>/SKILL.md .codex/skills/<name>/
cp .claude/skills/<name>/SKILL.md .cursor/skills/<name>/

Verification

Always verify sync after editing:

bash
diff .claude/skills/<name>/SKILL.md .codex/skills/<name>/SKILL.md
diff .claude/skills/<name>/SKILL.md .cursor/skills/<name>/SKILL.md

No output means files are identical.

Common Edits

  • Update description - Improve auto-discovery keywords
  • Add instructions - Expand the skill's capabilities
  • Fix errors - Correct mistakes in the skill logic
  • Add references - Create references/ directory for supporting docs

Deleting a Skill

Remove from all three locations:

bash
rm -rf .claude/skills/<name> .codex/skills/<name> .cursor/skills/<name>

© stacklok, Apache-2.0. 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 .codex/skills/skill-editor of stacklok/toolhive-studio.

Open the folder on GitHubat commit fc76b24

Compare with similar skills

Skill Editor 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 Editor compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Skill Editor this skillstacklok/toolhive-studio170—~408Automated safety check: PassApache-2.0
MCP Server Builderanthropics/skills180k64 repos~2.3kAutomated safety check: PassApache-2.0
MCP Server BuildershareAI-lab/learn-claude-code78k5 repos~1.2kAutomated safety check: PassMIT
MCP Integration for Pluginsanthropics/claude-plugins-official38k11 repos~3.1kAutomated safety check: PassApache-2.0
Fastmcp Client CLIPrefectHQ/fastmcp28k1 repos~823Automated safety check: PassApache-2.0
Crush Configurationcharmbracelet/crush29k—~3.7kAutomated safety check: PassCustom licence

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  • MCP Server Builder

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  • MCP Server Builder

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    28k GitHub starsUsed in 1 repo~823 tokens
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Works with

Categories

Questions about Skill Editor

What does Skill Editor do?

REQUIRED for editing any skill file. An agent skill from stacklok/toolhive-studio. Skill Editor is an agent skill from stacklok/toolhive-studio. REQUIRED for editing any skill file.

When should I use Skill Editor?

Skill Editor fits situations like: tasks that involve MCP servers.

How do I install Skill Editor in Claude Code?

Run `npx skills add stacklok/toolhive-studio --skill skill-editor -a claude-code`. Or copy the skill folder (.codex/skills/skill-editor in stacklok/toolhive-studio) into .claude/skills/skill-editor in your project. Claude Code loads it when a task matches its description.

How do I install Skill Editor in Codex?

Run `npx skills add stacklok/toolhive-studio --skill skill-editor -a codex`. Or copy the skill folder (.codex/skills/skill-editor in stacklok/toolhive-studio) into .agents/skills/skill-editor in your project. Codex loads it when a task matches its description.

Can I use Skill Editor 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 stacklok/toolhive-studio --skill skill-editor -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/skill-editor, .gemini/skills/skill-editor, .github/skills/skill-editor and .opencode/skills/skill-editor in your project.

What does Skill Editor need to run?

SKILL.md names no scripts, command-line tools or credentials: Skill Editor is instructions for the agent only.

Does Skill Editor 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 Skill Editor 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 Skill Editor use?

Skill Editor is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Skill Editor use?

About 408 tokens (SKILL.md is roughly 1.6k 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 Skill Editor?

Skills that share tags, products or a category with Skill Editor: MCP Server Builder (anthropics/skills, 180k stars), MCP Server Builder (shareAI-lab/learn-claude-code, 78k stars), MCP Integration for Plugins (anthropics/claude-plugins-official, 38k stars) and Fastmcp Client CLI (PrefectHQ/fastmcp, 28k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Skill Editor?

stacklok (a GitHub organization) maintains it in stacklok/toolhive-studio, which has 170 GitHub stars. The repository holds 9 skills in this directory. The repository was last updated on October 7, 2026.

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