Kit Extensions

Q: What is a Claude Code skill and how does the Kit Extensions skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Kit Extensions is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Content category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Content · Sub-category: content-misc · Last updated: 2026-06-13

Guide for creating Kit extensions. Use when the user asks to build, create, or modify a Kit extension, add a custom tool, slash command, widget, keyboard shortcut, editor interceptor, tool renderer, or hook into any Kit lifecycle event.

From the source SKILL.md

Kit extensions are single-file Go programs interpreted at runtime by Yaegi. They hook into Kit's lifecycle, register custom tools and slash commands, display widgets, intercept editor input, render tool output, register and switch color themes, and more.

What this skill does

Kit Extensions is a community-contributed Claude Code skill in the content-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/kit-extensions/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when the user asks to build, create, or modify a Kit extension, add a custom tool, slash command, widget, keyboard shortcut, editor interceptor, tool renderer, or hook into any Kit lifecycle event.

Who uses this skill

The Kit Extensions Claude Code skill is built for content creators, marketers, copywriters, SEO professionals, and editorial teams. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 116,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/kit-extensions
curl -L https://claudskills.com/skills/kit-extensions/SKILL.md \
  -o ~/.claude/skills/kit-extensions/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/kit-extensions/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/kit-extensions/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\kit-extensions\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Kit Extensions Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/kit-extensions/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Kit Extensions skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Kit Extensions skill?

Use Kit Extensions when your Claude Code task falls under the Content category — specifically in the content misc area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Kit Extensions" or describe the task and let Claude pick). Browse related skills at /category/content/.

What is a Claude Code skill and how does the Kit Extensions skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Kit Extensions is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Content category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/mark3labs/kit/blob/7f366eab845d7277b1f3e285d3b847d47f6e77bb/skills/kit-extensions/SKILL.md
License: MIT
Author: mark3labs
Website: http://go-kit.dev/

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

mark3labs. (2026). Kit Extensions [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/kit-extensions/

BibTeX

@misc{kit-extensions-2026,
  author    = {mark3labs},
  title     = {Kit Extensions [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/kit-extensions/}
}

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